HomeMy WebLinkAboutWWP2703557U**'-',FINANCE AND INFORMATION SERVICES
DEPARTMENT
M E M O R A N D. U M
DATE: March 1, 2011
TO: Casaundra Commodore, Finance & Information Services
Department
FROM: Mike Benoit,. Wastewater Utility
SUBJECT: Re: INTERFUND TRANSFER REQUEST
Instructions: Please note that failure to provide all digits will result in processing
delays. All Signatures and correct documentation must be included.
Please prepare the following inter -fund transfer:
Y)PngrtmPnt Charcrpd-
Account Numbery
Project, function,
Description
Amount
task, sub -task
426.465492.018.5953.35.63.000
U45492.f010.0000.0000
Water Permit Fee #WI 10033 for Lake
$2,260
Washington Beach Lift Station
Replacement Project, CAG-10-120
(Misc Water Installation)
426.465492.018.5953.35.63.000
U45492.f010.0000.0000
Water Permit Fee #W110033 for Lake
$67.80
Washington Beach Lift Station
Replacement Project, CAG-10-120
%(Technology
Fee)
Total
$2,327.80
*Charged Department Authorizations ,'
APPROVAL SIGNATURE:
Printed Name Dave Christensen
ralq2-110a
Date March 1, 2010
Account Number
Project, function, task,
Description
Amount
sub -task
405.000000.018.388.10.00.013
4059 Misc Water
Water Permit Fee #W 110033 for Lake
$2,260
Installation
Washington Beach Lift Station
Replacement Project, CAG-10-120
(Misc Water Installation)
503.000000.004.322.10.00.011
3080 Tech Fee
Water Permit Fee #W110033 for Lake
$67.80
Washington Beach Lift Station
Replacement Project, CAG-10-120
(Technology Fee)
Total
$2,327.80
Reason:
Water Service Permit Fee #W 110033 for the Lake Washington Beach Lift Station Replacement Project, CAG-10-120 for
both Misc Water Installation and Technology Fee payment.
Note: Documentation to support this transfer request must be attached and all signatures are required.
H:\File Sys\WWP - WasteWater\WWP-27-3557 Lake Washington Beach Lift Sta Replacement\permits\InterfundTransfer Lake WA Beach
Water Permit Fee.doc
Revised 01/09
Printed: 03-01-2011
Payment Made
CITY OF RENTON
1055 S. Grady Way
Renton, WA 98055
Water Service Permit
RECEIPT
Permit#: W110033
03101 /2011 10:35 AM
Total Payment: 2,327.80
UTILITY DIVISION
Receipt Number: R1100645
Payee: IOT - FROM WASTEWATER
Current Payment Made to the Following Items:
Trans Account Code Description Amount
------------------------------------------------------ ----------------
3080 503.000000.004.322 Technology Fee 67.80
4059 405.000000.018.388 Misc. Water Installation 2,260.00
Payments made for this receipt
Trans Method Description Amount
---------- -------- --------------------------- ---------------
Payment IOT WASTEWAT 2,327.80
Account Balances
Trans
Account Code
Description
Balance Due
------
3080
------------------
503.000000.004.322
------------------------------
Technology Fee
---------------
.00
4021
405.000000.018.343
Meter Processing Fee
.00
4056
425.000000.018.388
Spec Util Connect Water
.00
4059
405.000000.018.388
Misc. Water Installation
.00
4068
405.000000.000.237
Hydrant Deposit
.00
Remaining Balance Due: $0.00
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DEPARTMENT OF COMMUNITY D City of
AND ECONOMIC DEVELOPMENT
M E M O R A N D U M
DATE: September 20, 2010
TO: Mike Benoit, Wastewater Utility
FROM: C. E. "Chip" Vincent, Planning Director
SUBJECT: Lake Washington Beach Lift Station
The Lake Washington Beach Lift Station, located within the south parking lot of Gene
Coulon Park is proposed for replacement by the City's Wastewater Utility. The project is
not proposed on lands covered by water, and all utility lines associated with the project
are 8-inches or less in diameter. The project is located within the buffer of John's Creek;
however, work is limited to the developed areas of the park, specifically the parking lot.
One tree is proposed for removal as part of project construction. A Critical Areas
Exemption has been requested in order to allow work within the creek buffer.
WAC 197-11-800 (23) (b) exempts the project from SEPA environmental review:
(23) Utilities. The utility -related actions listed below shall be exempt, except for
installation, construction, or alteration on lands covered by water. The exemption
includes installation and construction, relocation when required by other governmental
bodies, repair, replacement, maintenance, operation or alteration that does not change
the action from an exempt class.
(b) All storm water, water and sewer facilities, lines, equipment, hookups or
appurtenances including, utilizing or related to lines eight inches or less in diameter.
Per RMC4-3-050C.5.e.ii., the project qualifies for a Critical Areas Exception for
replacement, modification, and repair of utility systems in a stream buffer area, and
vegetation management/essential tree removal (RMC4-3-050C.5.e.v.). The Code states
that any trees removed shall be retained as large woody debris in the stream buffer
corridor, where feasible. In this instance, retention of the removed tree in the buffer at
this location does not appear to be feasible, in that the area is currently developed, and
placement of the tree in the stream could result in damage to the riparian corridor as
the tree is moved to the stream. Therefore, the retention of the tree as large woody
debris is not required.
cc: Jennifer Henning, Planning Manager
Rocale Timmons, Associate Planner
h:\ced\planning\current planning\jth\correspondence\2010\coulon lift station.doc
DEPARTMENT OF COMMUNITY 00000
D cityof. ;; S
AND ECONOMIC DEVELOPMENT I Itti,
PLANNING DIVISION
CERTIFICATE OF EXEMPTION
FROM CRITICAL AREAS REGULATIONS
EVALUATION FORM & DECISION
DATE OF PERMIT ISSUANCE: August 19, 2010
LAND USE ACTION FILE NO.: LUA10-054, CAR
PROJECT NAME: Lake Washington Beach Lift Replacement
PROJECT MANAGER: Rocale Timmons, Associate Planner
OWNER/APPLICANT: City of Renton
1055 S. Grady Way
Renton, WA 98057,
CONTACT (if other than Owner): Michael Benoit AUG 2 5 2010
City of Renton CITY OF ON
1055 S. Grady Way UTILITYe����nc
Renton, WA 98057
PROJECT LOCATION: 1201 Lake Washington Blvd N
CRITICAL AREA: Stream (John's Creek)
PROPOSAL DESCRIPTION: The applicant, the City of Renton, is proposing to replace the
Lake Washington beach lift station. This station is used to provide sanitary sewer service to the
restrooms and bath -house located in the south portion of Gene Coulon Memorial Beach Park. The
station was constructed in 1969 and requires replacement. The area of work is located within the
buffer of John's Creek, a Class 2 waterbody. The new station would be constructed utilizing specialized
"chopper" pumps designed to pass foreign debris and prevent clogging. The project is categorically
exempt from Environmental "SEPA" Review. The area of work is approximately 18,000 square feet
and is located within the R-1 zoning designation.
EXEMPTION JUSTIFICATION: Pursuant to RMC4-3-050C.5.g.i Maintenance and
Construction — Existing Uses and Facilities, of the Critical Areas Regulations is hereby granted:
RMC4-3-050C.5.g.i. Remodeling, Replacing, Removing Existing Structures, Facilities, and
Improvements: Remodeling, restoring, replacing or removing structures, facilities and other
X improvements in existence on the date this section becomes effective and that do not meet
the setback or buffer requirements of this section provided the work complies with the
criteria in RMC 4-10-090.
FINDINGS: The proposed development is consistent with the following findings pursuant to RMC
section 4-3-050C.5:
City of Renton Department of Community & Economic Development Certificate of Exemption from Critical Areas Regulations
LAKE WASHINGTON BEACH LIFT REPLACEMENT LUA20-054, CAR
DATE OF PERMIT: August 17, 2010 Page 2 of 2
1. The activity is not prohibited by this or any other chapter of the RMC or state or federal law or
regulation.
2. The activity will be conducted using best management practices as specified by industry
standards or applicable Federal agencies or scientific principles if submitted plans are followed
and the conditions of approval of this exemption are met.
3. Impacts will be minimized and disturbed areas will be immediately restored, if submitted plans
are followed and the conditions of approval of this exemption are met.
4. Where stream or buffer disturbance occurs during construction or other activities in accordance
with this exemption, the site will be revegetated with native vegetation as required and
monitored for success as a condition of approval for this exemption.
DECISION: An exemption from the critical areas regulations is approved for the stream and its
buffer.
SIGNATURE:
G. 427. 6,t --- V — q ((,7 1 /in
C.E. "Chip" Vincent, Director Date
Planning Division
APPEALS: Appeals of permit issuance must be filed with the City of Renton Hearing Examiner by 5:00
p.m. on September 2, 2010. Appeals must be filed in writing, together with the required fee to the City
of Renton Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057. City of Renton
Municipal Code Section 4-8-110 governs appeals to the Hearing Examiner. Additional information
regarding the appeal process may be obtained from the Renton City Clerk's Office, (425) 430-6510.
EXPIRATION: Five (5) years from the date of approval (signature date).
PUBLIC WORKS DEPARTMENT p ^Ci��O� O
M E M O R A N D U M
DATE: August 4, 2010
TO: Chip Vincent, CED Planning Director
FROM: Mike Benoit, Wastewater Utility, x7206�1
SUBJECT: Lake Washington Beach Lift Station Replacement
The Wastewater Utility is proposing to replace the Lake Washington Beach Lift Station. This
station is operated solely for the purpose of providing sanitary sewer service to a portion of
Gene Coulon Memorial Beach Park. The station is located in the south parking lot of the park.
A vicinity map and a project narrative are attached.
It is our interpretation, under WAC 197-11-800(23), that this project is categorically exempt.
The project is not proposed for lands covered by water and all of the utility lines associated
with the project are eight inches or less in diameter.
The project is located within the buffer of John's Creek. Work will be limited to the developed
areas, specifically the parking lot. We are also proposing to remove one of the planter islands,
including a tree, as part of the construction. This is in coordination with the Parks Department
who are balancing the need to keep available parking versus the value of the one planter and
tree.
We are also in the process of submitting a request for a critical area exemption to replace the
lift station and remove the tree in the buffer area. It is our interpretation that this project
meets the requirements.
We do note that it is typically a condition, as part of the critical area code, that a removed tree
be placed in the stream / buffer where feasible. We would recommend that, in this instance, it
be determined not feasible as permitted by the code. This is based upon the concern of the
Parks Department about the impacts of placing and maintaining the tree at that location. Our
stream study, which will be submitted with the request for exemption, also raises concern
about potential damage to the riparian corridor in an attempt to move the tree down to the
stream.
Please let us know whether or not you agree with our determination that this project is
categorically exempt.
Attachments
h:\file sys\wwp - wastewater\wwp-27-3557 lake washington beach lift sta elimination\permits\catag exempt
memo.doc\MABtp
Lake Washington Beach Lift Station Replacement Proiect Narrative:
The City of Renton needs to replace the Lake Washington Beach Lift Station. This lift
station provides sanitary sewer service to the restrooms and bathhouse located in the
south portion of Gene Coulon Memorial Beach Park. It is not designed or proposed to
provide for any "regional" service outside of the park usage.
The station was constructed in 1969. The station has reached the end of its useful life. In
addition to age, there are other operations and maintenance issues with the station that
need to be resolved as part of the replacement.
The uncontrolled public use of the site has caused operations problems as parks patrons
have been known to flush everything through the restrooms, up to and including bathing
suits and beach towels. This has caused consistent plugging of the pumps shutting down
the station and the need for maintenance call outs. The new station will be constructed
utilizing specialized "chopper" pumps designed to pass foreign debris and prevent
clogging.
The existing station is located in the middle of the parking lot in an unsecured location.
During the park's high usage periods, when the station is going to be in most need of
maintenance or repair, it is difficult to get to the station with equipment. What access we
do have potentially blocks patron vehicles. In addition, since the area is unsecured, the
maintenance staff has to utilize additional manpower to prevent the curious public from
approaching the opened underground structures.
The new station will be located at the outer rim of the parking area, away from the flow
of patron traffic. It will also be enclosed by a short fence. The new area will provide for
an open space for the crews to park their vehicle during typical maintenance activities
that won't block usage by parks patrons and act as a security barricade to prevent casual
approach to the work area.
We have worked with the Parks Department to best place the station within the available
situation. The project will eliminate four parking stalls and a small planter that contains a
15" diameter tree. We will regain three parking stalls by restriping the lot in the area.
Construction of the new station will include:
• The installation of an eight foot diameter underground wet well (storage) with
submersible pumps installed inside.
• The installation of an underground vault for the valving.
• Installation of approximately 50 feet of 8" gravity sewer main to route flows to
the new station
• Installation of a 3/a" water service for maintenance of the site.
• Abandon the old lift station in place.
• Seal coat and restripe parking lot in the construction area.
• Installation of an above ground cabinet housing the control and telemetry panels.
• Installation of a 42" high fence around lift station.
_ _ _ _\1 7,
— — — — — — — — — -A
LAKE -
WASHINGTON
to
-———— — — — — —,
OULON
--——— — PARK
- - OJEC
LO ATI
milliIMo
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LAKE WASHINGTON BEACH
LIFT STATION REPLACEMENT
4-3-050C
p EXEMPT ACTi1lITIES PERMITTE[}Wlil[CR,ktXtf
Aquifer Flood
Geologic Habitat
Streams and
Protection Hazard
Hazard Conservation
Lakes: Class
EXEMPT ACTIVITY Area Area
Area Area
2 to 4 Wetlands
e. Roads, Parks, Public and Private Utilities: (Continued)
iv. Modification of Existing Utilities and
X
X:
X:
Streets by Ten Percent (10%) or Less: Over-
building (enlargement beyond existing
Exemption is
Exemption is
project needs) or replacement of existing
not allowed
not allowed in
utility systems and replacement and/or reha-
in Category 1
Category 1
bilitation of existing streets, provided:
wetlands.
wetlands.
(1) The work does not increase the foot-
print of the structure, line or street by more
than ten percent (10%) within the critical
area and/or buffer areas, and occurs in the
existing right-of-way boundary or easement
boundary.
(2) Restoration shall be conducted where
feasible. Compensation for impacts to buff-
ers shall include enhancement of the
remaining buffer area along the impacted
area where there is enhancement opportu-
nity.
(3) The Administrator determines that,
based on best judgment, a person would
not: (a) be able to meaningfully measure,
detect, or evaluate insignificant effects; or
(b) expect discountable effects to occur.
(4) This exemption allows for 10% maxi-
mum expansion total, life of the project. After
the 10% expansion cap is reached, future
improvements are subject to all applicable
provisions of this Section.
v. Vegetation Management/Essential Tree
X
X
X
X:
X:
Removal for Public or Private Utilities,
Roads, and Public Parks: Maintenance
Trees shall
Tree cutting
activities, including routine vegetation man-
be retained
and vegeta-
agement and essential tree removal, and
as large
tion manage-
removal of non-native invasive vegetation or
woodydebris
ment accom-
weeds listed by the King County Noxious
in the
plished such
Weed Board or other government agency,
stream/
that trees are
for public and private utilities, road rights -of-
buffer corri-
retained in the
way and easements, and parks.
dor, where
wetland and
feasible.
buffer where
feasible.
If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
(Revised 6/05) 3 - 18.4
LIMITS OF CONTRACTOR
NORTH �i OPERATIONS
(BELOW GRADE)
LIFT STATION
ANTENNA
'00
CONTROL PANEL
VALVE VAULT
(BELOW GRADE)
APPROXIMATE
FENCED AREA
680 SO FT
(18 FT x 38 FT)
IT - IV MD41 ROLL GATE
1.
K-.-'�SITE PLAN
�SCALE �1"—
FIIE ...V
. . . ............
GENE COULON MEMORIAL BEACH
PARKENTRANCE
Figure No. 2
0, SITE PLAN
LAKE WASHINGTON BEACH LIFT STATION
CITY OF RENTON
Working Wonders With Water
C:\pvv_working\projectwiseXhgarcia\dms99193\Figure-2 3-30-10 03:14pm HGarcia XREFS: 8453-SRV
4-3-050C
ment permit, but is subject to this Sec-
do not need to comply with mitigation ra-
tion, the Department Administrator shall
tios of subsection M11 of this Section,
determine whether to grant or deny a
Wetlands Creation and Restoration, or
separate critical areas permit based upon
subsection M12 of this Section, Wetland
compliance with applicable standards
Enhancement, unless required in exemp-
and regulations of this Section.
tion criteria.
b. Aquifer Protection Area — Operat- c. Reports and Mitigation Plans Re-
ing and Closure Permits: Aquifer pro- quired: A report for the specific critical
tection area operating permit and closure area affected, and/or enhancement or
permit requirements are contained in mitigation plan shall be required pursuant
RMC 4-9-015, Aquifer Protection Area to subsections H to M of this Section, un-
Permits. less otherwise waived by the Department
Administrator.
3. Finding of Conformance Required:
d. Administrator Findings: In deter -
a. General: Conformance with these
mining whether to issue a letter of ex -
critical area regulations shall be a finding
emption for activities listed in subsections
in any approval of a development permit
C5, C6, and C7 of this Section, the Ad -
or aquifer protection area permit, and
ministrator shall find that:
such finding shall be documented in writ-
ing in the project file.
i. The activity is not prohibited by
this or any other chapter of the RMC
b. Aquifer Protection Areas: No
or State or Federal law or regulation;
changes in land use shall be allowed nor
shall permits for development be issued if
ii. The activity will be conducted us -
the Department finds that the proposed
ing best management practices as
land use, activity, or business is likely to
specified by industry standards or
impact the long-term, short-term or cu-
applicable Federal agencies or sci-
mulative quality of the aquifer. The find-
entific principles;
ing shall be based on the present or past
activities conducted at the site; hazard-
iii. Impacts are minimized and,
ous materials that will be stored, handled,
where applicable, disturbed areas
treated, used or produced; and the po-
are immediately restored, unless the
tential for the land use, activity, or busi-
exemption is a wetland below the
ness to degrade groundwater quality.
size thresholds pursuant to subsec-
tion C5f(i) of this Section;
4. Letter of Exemption:
iv. Where water body or buffer dis-
a. Aquifer Protection, Flood Haz-
turbance has occurred in accordance
ards, Geologic Hazards, Habitat Con-
with an exemption during construc-
servation, Streams and Lakes,
tion or other activities, revegetation
Wetlands: Except in the case of public
with native vegetation shall be re -
emergencies, all exemptions in subsec-
quired.
tions C5, C6 and C7 of this Section re-
quire that a letter of exemption be
v. If a hazardous material, activity,
obtained from the Department Adminis-
and/or facility that is exempt pursu-
trator prior to construction or initiation of
ant to this Section has a significant or
activities.
substantial potential to degrade
groundwater quality, then the Depart-
b. Applicability of Section Require-
ment Administrator may require com-
ments to Exempt Activities: Exempt
pliance with the aquifer protection
activities provided with a letter of exemp-
requirements of this Section other-
tion may intrude into the critical area or
wise relevant to that hazardous ma -
required buffer subject to any listed con-
terial, activity, and/or facility. Such
ditions or requirements. Exempt activities
3 - 17 (Revised 6/05)
4-3-050C
determinations will be based upon
site and/or chemical -specific data.
5. Specific Exemptions — Critical Areas
and Buffers: Specific exempt activities are
listed in the following table. If an "X" appears
in a box, the listed exemption applies in the
specified critical area and required buffer. If
an "X" does not appear in a box, then the ex-
emption does not apply in the particular criti-
cal area or required buffer. Where utilized in
the following table the term "restoration"
means returning the subject area back at a
minimum to its original state following the per-
formance of the exempt activity. Activities tak-
ing place in critical areas and their associated
buffers and listed in the following table are ex-
empt from the applicable provisions of this
Section, provided a letter of exemption has
been issued per subsection C4 of this Sec-
tion, Letter of Exemption. Whether the ex-
empted activities are also exempt from
permits will be determined based upon appli-
cation of chapters 4-8 and 4-9 RMC, or other
applicable sections of the Renton Municipal
Code.
Aquifer Flood
Geologic
Habitat
Streams and
Protection Hazard
Hazard
Conservation
Lakes: Class
EXEMPT ACTIVITY Area Area
Area
Area
2 to 4
Wetlands
` Corfsefvat�an, Eairte�ret,` utlo)? ansl,t?etated Ac`trvities:.,
a� ,
....
Xk f ,
i. Natural Resource/Habitat Conservation
X
X
X
X
X
or Preservation: Conservation or preserva-
tion of soil, water, vegetation, fish and other
wildlife.
ii. Enhancement activities as defined in
X
X
X
X
X
chapter 4-11 RMC.
iii. Approved Restoration/Mitigation: Any
X'
X
X
X
X
X
critical area and/or buffer restoration or other
mitigation activities which have been
�L
approved by the City.��
b n s
t tesearch r� SEtt#Ve`tgttooll
4 y"
i. Education and Research: Nondestructive X' X X
X
X
X
education and research.
ii. Site Investigative Work: Site investiga- X' X X X
X X
tive work necessary for land use application
submittals such as surveys, soil logs, perco-
lation tests and other related activities.
Investigative work shall not disturb any more
than five percent (5%) of the critical area and
required buffer. In every case, impacts shall
be minimized and disturbed areas shall be
immediately restored at a 1:1 ratio.
c Agriculttrral��ar�r,�stinc�".j�e�et�ti��t�l�rfagen�i�nt: .:' �s-
��
� ����` a g
i. Harvesting Wild Foods: The harvesting
X1
X
X
X
X
X
of wild foods in a manner that is not injurious
to natural reproduction of such foods and
provided the harvesting does not require till-
ing of soil, planting of crops or alteration of
the critical area.
'If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
(Revised 6/05) 3 - 18
4-3-050C
EXEMPT AGTIVMES - PERMITTED W1Tt IN C#iITiCAL AREAS AND ASSOCIATED BUFFERS m .....
Aquifer
Flood
Geologic
Habitat
Streams and
Protection
Hazard
Hazard
Conservation
Lakes: Class
EXEMPT ACTIVITY
Area
Area
Area
Area
2 to 4
Wetlands
c. Agricultural, Harvesting, Vegetation Management: (Continued)
ii. Existing/Ongoing Agricultural Activities:
X
X
X
X
X
Existing and ongoing agricultural activities
Ifarming, horticulture, aquaculture
and/or maintenance of existing irrigation
systems. Activities on areas lying fallow as
part of a conventional rotational cycle are
part of an ongoing operation; provided, that
the agricultural activity must have been con-
ducted within the last five years. Activities
that bring a critical area into agricultural use
are not part of an ongoing operation. Mainte-
nance of existing legally installed irrigation,
ditch and pipe systems is allowed; new or
expanded irrigation, ditch, outfall or other
systems are not exempt. If it is necessary to
reduce the impacts of agricultural practices
to critical areas, the Responsible Official
may require a farm management plan based
on the King County Conservation District's
Farm Conservation and Practice Standards,
or other best management practices.
iii. Dead or Diseased Trees: Removal of
X'
X
X
X
X:
X:
dead, terminally diseased, damaged, or dan-
gerous ground cover or hazard trees which
Limited to
Tree cutting of
have been certified as such by a forester,
cutting of
hazard trees
registered landscape architect, or certified
hazardtrees;
or other
arborist, selection of which to be approved by
such hazard
woody vege-
the City based on the type of information re-
trees
shall be
tation accom-
quired, or the City prior to their removal.
retained as
plished such
large woody
that trees are
debris in the retained
in the
stream/
wetland and
buffer corri-
buffer where
dor, where
feasible.
feasible.
If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
3 - 18.1 (Revised 11/07)
4-3-050C
r
Streams and
Aquifer
Flood
Geologic Habitat
Protection
Hazard
Hazard Conservation
Lakes: Class
EXEMPT ACTIVITY
Area
Area
Area Area
2 to 4 Wetlands
d. Surface Water:
i. New Surface Water Discharges: New
X
X
X
surface water discharges to wetland Catego-
ries 1, 2 and 3, or buffers of Categories 1, 2
and 3, and to streams or lakes from deten-
tion facilities, presettlement ponds or other
surface water management structures; pro-
vided, the discharge meets the requirements
of the Storm and Surface Water Drainage
Regulations (RMC 4-6-030); will not result in
significant adverse changes in the water
temperature or chemical characteristics of
the wetland or stream/lake water sources;
and there is no increase in the existing rate
of flow unless it can be demonstrated that
the change in hydrologic regime would result
in equal or improved wetland or stream/lake
functions and values. Where differences
exist between these regulations and RMC
4-6-030, these regulations will take prece-
dence.
ii. New or Modified Regional Stormwater
X
X
X
Facilities: Regional stormwater management
facilities to be operated and maintained
under the direction of the City Surface Water
Utility that are proposed and designed con-
sistent with the Washington State Depart-
ment of Ecology Wetlands and Stormwater
Management Guidelines or meeting equiva-
lent objectives. For habitat conservation
areas, this exemption applies only to Cate-
gory 1 wetlands.
iii. Flood Hazard Reduction: Implementa-
X
X
tion of public flood hazard reduction and
public surface water projects, where habitat
enhancement and restoration at a 1:1 ratio
are provided, and appropriate Federal and/
or State authorization has been received.
iv. Storm Drainage Piping: Installation of
X
new storm drainage lines in any geologic
hazard area when a geotechnical report
clearly demonstrates that the installation
would comply with the criteria listed in RMC
4-3-050J2b and that the installation would
be consistent with each of the purposes of
the geologic hazard regulations listed in
RMC 4-3-050A4. Also, to qualify for the
exemption, the report must propose appro-
priate mitigation for any potential impacts
identified in the report.
1If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
(Revised 11/07) 3 - 18.2
4-3-050C
EXEMPT ACTIVITIES — PERMITTED WITHIN CRITICAL AREAS AND ASSOCIATED BUFFERS .,
Aquifer
Flood
Geologic
Habitat
Streams and
Protection
Hazard
Hazard
Conservation
Lakes: Class
EXEMPT ACTIVITY
Area
Area
Area
Area
2 to 4
Wetlands
e. Roads, Parks, Public and Private Utilities:
i. Relocation of Existing Utilities out of Criti-
X'
X
X
X
X
X
cal Area and Buffer: Relocation out of critical
areas and required buffers of natural gas,
cable, communication, telephone and elec-
tric facilities, lines, pipes, mains, equipment
and appurtenances (not including substa-
tions), with an associated voltage of fifty five
thousand (55,000) volts or less, only when
required by a local governmental agency,
and with the approval of the City. Disturbed
eas shall be restored.
a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
tential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
r
otection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
3 - 18.2a (Revised I t/07)
This page left intentionally blank.
(Revised 11/07) 3 - 18.2b
4-3-050C
Aquifer
Geologic Habitat
Streams and
Flood
Protection
Hazard
Hazard Conservation
Lakes: Class
EXEMPT ACTIVITY
Area
Area
Area Area
2 to 4
Wetlands
ds,?tfks, P("iip and P>=ivate llt i
S �( of h�iaeli) ;s
ii. Existing Parks, Trails, Roads, Facilities,
X
X
X
X
and Utilities — Maintenance, Operation,
Repair: Normal and routine maintenance,
operation and repair of existing parks and
trails, streets, roads, rights -of -way and asso-
ciated appurtenances, facilities and utilities
where no alteration or additional fill materials
will be placed other than the minimum alter-
ation and/or fill needed to restore those facil-
ities to meet established safety standards.
The use of heavy construction equipment
shall be limited to utilities and public agen-
cies that require this type of equipment for
normal and routine maintenance and repair
of existing utility structures and rights -of -way.
In every case, critical area and required
buffer impacts shall be minimized and dis-
turbed areas shall be restored during and
immediately after the use of construction
equipment.
iii. Utilities, Traffic Control, Walkways,
X
X
X
X
Bikeways Within Existing, Improved Right -
of -Way or Easements: Within existing and
improved public road rights -of -way or ease-
ments, installation, construction, replace-
ment, operation, overbuilding or alteration of
all natural gas, cable, communication, tele-
phone and electric facilities, lines, pipes,
mains, equipment or appurtenances, traffic
control devices, illumination, walkways and
bikeways. If activities exceed the existing
improved area or the public right-of-way, this
exemption does not apply. Where applica-
ble, restoration of disturbed areas shall be
completed.
If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
3 - 18.3
(Revised 6/05)
4-3-050C
Aquifer
Flood
Geologic
Habitat Streams and
Protection
Hazard
Hazard
Conservation Lakes: Class
EXEMPT ACTIVITY Area
Area
Area
Area 2 to 4
Wetlands
e. ,T o01 ,arks, Pi bloc, nd Prtva a lifd
y��p�� 'QQraUn
,s;,
iv. Modification of Existing Utilities and
X
X:
X:
Streets by Ten Percent (10%) or Less: Over -
Exemption is
Exemption is
building (enlargement beyond existing
not allowed
not allowed in
project needs) or replacement of existing
in Category 1
Category 1
utility systems and replacement and/or reha
wetlands.
wetlands.
bilitation of existing streets, provided:
(1) The work does not increase the foot-
print of the structure, line or street by more
than ten percent (10%) within the critical
area and/or buffer areas, and occurs in the
existing right-of-way boundary or easement
boundary.
(2) Restoration shall be conducted where
feasible. Compensation for impacts to buff-
ers shall include enhancement of the
remaining buffer area along the impacted
area where there is enhancement opportu-
nity.
(3) The Administrator determines that,
based on best judgment, a person would
not: (a) be able to meaningfully measure,
detect, or evaluate insignificant effects; or
(b) expect discountable effects to occur.
(4) This exemption allows for 10% maxi-
mum expansion total, life of the project. After
the 10% expansion cap is reached, future
improvements are subject to all applicable
provisions of this Section.
v. Vegetation Management/Essential Tree
X
X
X
X:
X:
Removal for Public or Private Utilities,
Trees shall
Tree cutting
Roads, and Public Parks: Maintenance
be retained
and vegeta-
activities, including routine vegetation man-
as large
tion manage-
agement and essential tree removal, and
woodydebris
ment accom-
removal of non-native invasive vegetation or
in the
pli such
weeds listed by the King County Noxious
eam/ thatt
stream/
trees are
Weed Board or other government agency,
buffer corri- retained
in the
for public and private utilities, road rights -of-
dor, where
wetland and
way and easements, and parks.
feasible.
buffer where
feasible.
If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
(Revised 6/05) 3 - 18.4
4-3-050C
Aquifer
Flood
Geologic
Habitat
Streams and
Protection
Hazard
Hazard
Conservation
Lakes: Class
EXEMPT ACTIVITY
Area
Area
Area
Area
2 to 4
Wetlands
f. Wetland Disturbance,,,Modit;ea
i. Any Activity in Small Category 3 Wet-
X
lands: Any activity affecting hydrologically
isolated Category 3 wetland no greater than
two thousand two hundred (2,200) square
feet when consistent with all of the following
criteria:
(1) Standing water is not present in suffi-
cient amounts, i.e., approximately twelve
inches (12") to eighteen inches (18") in
depth from approximately December through
May, to support breeding amphibians;
(2) Species listed by Federal or State gov-
ernment as endangered or threatened, or
the presence of essential habitat for those
species, are not present;
(3) Some form of mitigation is provided for
hydrologic and water quality functions, for
example, stormwater treatment or landscap-
ing or other mitigation; and
(4) A wetland assessment is prepared by a
qualified professional demonstrating the cri-
teria of the exemption are met. The wetland
assessment shall be subject to independent
secondary review at the expense of the
applicant consistent with subsection F7 of
this Section.
ii. Temporary Wetland Impacts: Temporary
X
X
disturbances of a wetland due to construc-
tion activities that do not include permanent
filling may be permitted; provided, that there
are no permanent adverse impacts to the
critical area or required buffer, and areas
temporarily disturbed are restored at a 1:1
ratio. Category 1 wetlands and Category 2
forested wetlands shall be enhanced at a 2:1
ratio in addition to being restored. For habi-
tat conservation areas, this exemption
applies only to Category 1 wetlands.
m 1Uacii#et�anc an Ttrecst46�t#
d _
i. Remodeling, Replacing, Removing Exist-
X
X
X
X
ing Structures, Facilities, and Improvements:
Remodeling, restoring, replacing or remov-
ing structures, facilities and other improve-
ments in existence on the date this section
becomes effective and that do not meet the
setback or buffer requirements of this sec-
tion provided the work complies with the cri-
teria in RMC 4-10-090.
If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
3 - 18.5 (Revised 6)05)
4-3-050C
Aquifer
Flood
Geologic
Habitat
swum
OREM
Streams and
Protection
Hazard
Hazard
Conservation
Lakes: Class
EXEMPT ACTIVITY Area
Area
Area
Area
2 to 4 Wetlands
g {ll rnl enaii a anti Cons#rr #Qn — EzFstin uses
and'Fncil�fi � ntintt�d
�,. )
ii. Maintenance and Repair — Any Existing X
X
X
X
Public or Private Use: Normal and routine
maintenance and repair of any existing pub-
lic or private uses and facilities where no
alteration of the critical area and required
buffer or additional fill materials will be
placed. The use of heavy construction
equipment shall be limited to utilities and
public agencies that require this type of
equipment for normal and routine mainte-
nance and repair of existing utility or public
structures and rights -of -way. In every case,
critical area and required buffer impacts
shall be minimized and disturbed areas shall
be restored during and immediately after the
use of construction equipment.
iii. Modification of an Existing Single Fam-
X
X
X
X
ily Residence: Construction activity con-
nected with an existing single family
residence and/or garage; provided, that the
work does not increase the footprint of the
structure lying within the critical area or
buffer; and provided, that no portion of the
new work occurs closer to the critical area or
required buffers than the existing structure
unless the structure or addition can meet
required buffers. Existing or rebuilt acces-
sory structures associated with single family
lots such as fences, gazebos, storage
sheds, and play houses are exempt from
this Section. New accessory structures may
be allowed when associated with single fam-
ily lots such as fences, gazebos, storage
sheds, play houses and when built on and
located in a previously legally altered area.
iv. Existing Activities: Existing activities
X
X
X
X
X
which have not been changed, expanded or
altered, provided they comply with the appli-
cable requirements of chapter 4-10 RMC.
If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
(Revised 6/05) 3 - 18.6
4-3-050C
Aquifer
Flood
Geologic
Habitat
Streams and
Protection
Hazard
Hazard
Conservation
Lakes: Class
EXEMPT ACTIVITY Area
Area
Area
Area
2 to 4
Wetlands
h .emergency Activities: __..._
i. Emergency Activities: Emergency activi-
X'
X
X
X
X
X
ties are those which are undertaken to cor-
rect emergencies that threaten the public
health, safety and welfare pursuant to the
criteria in subsection C9b of this Section. An
emergency means that an action must be
undertaken immediately or within a time
frame too short to allow full compliance with
this Section, to avoid an immediate threat to
public health or safety, to prevent an immi-
nent danger to public or private property, or
to prevent an imminent threat of serious
environmental degradation.
ii. Emergency Tree/Ground Cover Cutting
X'
X
X
X
X:
X:
or Removal by Agency or Utility: Removal of
Downed haz-
Tree cutting
trees and/or ground cover by any City
and trees
and vegeta-
department or agency and/or public or pri-
shall be
tion manage-
vate utility in emergency situations involving
retained as
ment accom-
immediate danger to life or property, sub-
large woody
plashed such
stantial fire hazards, or interruption of ser-
debris in the
that trees are
vices provided by a utility.
stream/
retainedinthe
buffer.
wetland and
buffer where
feasible.
iii. Emergency Activities in Aquifer Protec-
X1
tion Area: Public interest emergency use,
storage, and handling of hazardous materi-
als by governmental organizations.
i *`azauslflater�als ky
i. Federal or State Pre-emption: Cleanups,
X1
monitoring and/or studies undertaken under
supervision of the Washington Department of
Ecology or the U.S. Environmental Protec-
tion Agency.
ii. Use of Materials with No Risk: Use, stor-
X1
age, and handling of specific hazardous
materials that do not present a risk to the
aquifer as determined and listed by the
Department.
' If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
6. Limited Exemptions: Activities that are
exempt from some, but not all provisions of
this Section are listed in the following table. If
an "X" appears in a box, the listed exemption
applies in the specified critical area and re-
quired buffer. If an "X" does not appear in a
box, then the exemption does not apply in the
particular critical area or required buffer.
Whether the exempted activities are also ex-
empt from permits will be determined based
upon application of chapters 4-8 and 4-9
RMC, or other applicable sections of the
Renton Municipal Code.
3 - j 8.7 (Revised 6/05)
4-3-050C
Aquifer
Flood
Geologic
Habitat
Streams
Protection
1EXEMPTACTIVITY
Hazard
Hazard
Conservation
and Lakes:
Area
Area
Area
Area
Class 2 to 4
Wetlands
a. HazardoUi§; Materials:
§ .
i. Materials for Sale in Original Small Con-
X1
tainers: Hazardous materials offered for sale
in their original containers of five (5) gallons
or less shall be exempt from requirements in
subsections H2d(i) through (vi) of this Sec-
tion and the requirements pertaining to
removal of existing facilities in subsection
H2a(i).
ii. Activities Exempt from Specified Aquifer
X1
Protection Area Requirements: The following
are exempt from requirements in subsec-
tions H2d(i) through (vi) of this Section, the
requirements pertaining to review of pro-
posed facilities in subsection C8d, Prohibited
Changes in Land Use and Types of New
Facilities — Aquifer Protection Areas, and the
requirements pertaining to removal of exist-
ing facilities in subsection 112a(i).
(1) Hazardous materials use, storage, and X'
handling in de minimis amounts (aggregate
quantities totaling twenty (20) gallons or less
at the facility or construction site). Weights of
solid hazardous materials will be converted
to volumes for purposes of determining
whether de minimis amounts are exceeded.
Ten (10) pounds shall be considered equal
to one gallon.
(2) Noncommercial residential use, stor- X1
age, and handling of hazardous materials;
provided, that no home occupation business
(as defined by chapter 4-11 RMC) that uses,
stores, or handles more than twenty (20) gal-
lons of hazardous material is operated on
the premises.
(3) Hazardous materials in fuel tanks and Xi
fluid reservoirs attached to a private or com-
mercial motor vehicle and used directly in
the operation of that vehicle.
(4) Fuel oil used in existing heating sys- X1
tems.
(5) Hazardous materials used, stored, and X1
handled by the City of Renton in water treat-
ment processes and water system opera-
tions.
'If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
(Revised 6/05) 3 - 18.8
4-3-050C
Aquifer
Flood
Geologic
Habitat
Streams
Protection
Hazard
Hazard
Conservation
and Lakes:
EXEMPT ACTIVITY
Area
Area
Area
Area
Class 2 to 4
Wetlands
_ � r
a. Hazardous Materials: (Gorttinued) 9
(6) Fueling of equipment not licensed for X'
street use; provided, that such fueling activi-
ties are conducted in a containment area
that is designed and maintained to prevent
hazardous materials from coming into con-
tact with soil, surface water, or groundwater
except for refueling associated with con-
struction activity regulated by subsection H7
of this Section, Construction Activity Stan-
dards — Zones 1 and 2.
(7) Hazardous materials contained in prop-
X1
erly operating sealed units (transformers,
refrigeration units, etc.) that are not opened
as part of routine use.
(8) Hazardous materials in fuel tanks and
X1
fluid reservoirs attached to private or com-
mercial equipment and used directly in the
operation of that equipment.
(9) Hazardous materials in aerosol cans.
X1
(10) Hazardous materials at multi -family
X1
dwellings, hotels, motels, retirement homes,
convalescent centers/nursing homes, mobile
or manufactured home parks, group homes,
and daycare family homes or centers when
used by owners and/or operators of such
facilities for on -site operation and mainte-
nance purposes.
Hazardous materials used for janitorial
X'
,(11)
purposes at the facility where the products
are stored.
(12) Hazardous materials used for per-
X'
sonal care by workers or occupants of the fa-
cility at which the products are stored includ-
ing but not limited to soaps, hair treatments,
grooming aids, health aids, and medicines.
iii. Uses, Facilities, and Activities in Zone 1
X1
Modified Aquifer Protection Area Exempt
from Specified Aquifer Protection Area
Requirements: Facilities located in the Zone
1 Modified Aquifer Protection Area in Figure
4-3-05001 are exempt from the following:
(1) Removal requirements in subsection
X1
H2a(i) of this Section except that the stor-
age, handling, use, treatment, and produc-
tion of tetrachloroethylene (e.g., dry-cleaning
fluid) shall continue to be prohibited;
(2) Additional facility requirements in sub-
X1
section H2d(vi) of this Section;
If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
3 - 18.9 (Revised 6/05)
4-3-050C
7MMM
Aquifer
Flood
ams
Geologic Habitat 7and
Protection
Hazard
Hazard Conservation akes:EMPT
ACTIVITY
Area
Area
Area Area 2 to 4
Wetlands
74-6-(�3)Wastewater requirements in RMC X'
040J1 a but shall be subject to Zone 2
equirements in RMC 4-6-040J2;
(4) The prohibition of septic systems con- X'
tained in subsection C8d(i)(f) of this Section;
and
(5) Surface water management require- X1
ments of RMC 4-6-030E except that Zone 2
requirements contained in RMC 4-6-030E
shall apply.
I If a hazardous material, activity, and/or facility that is exempt pursuant to this Section has a significant or substantial
potential to degrade groundwater quality, then the Department Administrator may require compliance with the aquifer
protection requirements of this Section otherwise relevant to that hazardous material activity and/or facility.
7. Exemptions in Buffers: The activities
listed in the following table are allowed within
critical area buffers, and are exempt from the
applicable provisions of this Section, pro-
vided a letter of exemption has been issued
per subsection C4 of this Section, Letter of
Exemption. If an "X" appears in a box, the
listed exemption applies in the specified
buffer. If an "X" does not appear in a box, then
the exemption does not apply in the required
buffer. Whether the exempted activities are
also exempt from permits will be determined
based upon application of chapters 4-8 and
4-9 RMC, or other applicable sections of the
Renton Municipal Code.
(Revised 6/05) 3 - 18.10
4-3-050C
Aquifer
Flood
Geologic
Habitat
Streams
Protection
Hazard
Hazard
Conservation
and Lakes:
EXEMPT ACTIVITY
Area
Area
Area
Area
Class 2 to 4
Wetlands
a. Activities in Grifical AreaZuffers
i. Trails and Open Space: Walkways and trails,
X
X
X
X
and associated open space in critical area buffers
located on public property, or where easements or
agreements have been granted for such purposes
on private property. All of the following criteria
shall be met.
(1) The trail, walkway, and associated open space
shall be consistent with the Comprehensive Parks,
Recreation, and Open Space Master Plan. The
City may allow private trails as part of the approval
of a site plan, subdivision or other land use permit
approvals.
(2) Trails and walkways shall be located in the
outer twenty-five percent (25%) of the buffer, i.e.,
the portion of the buffer that is farther away from
the critical area. Exceptions to this requirement
may be made for:
• Trail segments connecting to existing trails
where an alternate alignment is not practical.
• Public access points to water bodies spaced
periodically along the trail.
(3) Enhancement of the buffer area is required
where trails are located in the buffer. Where
enhancement of the buffer area adjacent to a trail
is not feasible due to existing high quality vegeta-
tion, additional buffer area or other mitigation may
be required.
(4) Trail widths shall be a maximum width of
twelve (12) feet. Trails shall be constructed of per-
meable materials. Impervious materials may be
allowed if pavement is required for handicapped or
emergency access, or safety, or is a designated
nonmotorized transportation route or makes a
connection to an already dedicated trail, or
reduces potential for other environmental impacts.
ii. Stormwater Management Facilities in Buffer:
X
X
X
Stormwater management facilities in critical area
buffers including stormwater dispersion outfall
systems designed to minimize impacts to the
buffer and critical area, where the site topography
requires their location within the buffer to allow
hydraulic function, provided the standard buffer
zone area associated with the critical area classi-
fication is retained pursuant to subsection L or
M6c of this Section, and is sited to reduce impacts
between the critical area and surrounding activi-
ties. For Habitat Conservation Areas, this exemp-
tion applies only to Category 1 wetlands.
Stormwater management facilities located in wet-
land buffers shall require buffer enhancement or
buffer averaging when they are sited in areas of
forest vegetation.
3 - 18.11 (Revised 6/05)
4-3-050C
8. Prohibited Activities: Prohibited activi-
ties are identified below for each critical area
governed by this Section.
a. General — All Critical Areas: No ac-
tion shall be taken by any person, com-
pany, agency, or applicant which results
in any alteration of a critical area except
as consistent with the purpose, objec-
tives, and requirements of this Section.
b. Prohibited Activities—Floodways:
Encroachments, including fill, new con-
struction, substantial improvements, and
construction or reconstruction of residen-
tial structures is prohibited within desig-
nated floodways, unless it meets the
provisions of subsection 14 of this Sec-
tion, Additional Restrictions within Flood -
ways.
c. Prohibited Activities — Streams/
Lakes and Wetlands: Grazing of ani-
mals is not allowed within a stream, lake,
wetland or their associated buffers.
d. Prohibited Changes in Land Use
and Types of New Facilities— Aquifer
Protection Areas.
i. Zone 1:
(a) Changes in land use and
types of new facilities in which
any of the following will be on the
premises:
(1) More than five hundred
(500) gallons of hazardous mate-
rial;
(2) More than one hundred fifty
(150) gallons of hazardous mate-
rial in containers that are opened
and handled;
(3) Containers exceeding five
(5) gallons in size; or
(4) Tetrachloroethylene (e.g.,
dry-cleaning fluid).
(b) Surface impoundments (as
defined in chapters 173-303 and
173-304 WAC);
(c) Hazardous waste treat-
ment, storage, and disposal facil-
ities;
(d)
All types of landfills, includ-
ing
solid waste landfills;
(e)
Transfer stations;
(f)
Septic systems;
(g)
Recycling facilities that han-
dle
hazardous materials;
(h) Underground hazardous
material storage and/or distribu-
tion facilities;
(i) New heating systems using
fuel oil except for commercial
uses when the source of fuel oil
is an existing above -ground
waste oil storage tank; and
0) Petroleum product pipe-
lines.
ii. Zone 2:
(a) Surface impoundments (as
defined in chapters 173-303 and
173-304 WAC);
(b) Recycling facilities that han-
dle hazardous materials;
(c) Hazardous waste treat-
ment, storage, and disposal facil-
ities;
(d) Solid waste landfills;
(e) Transfer stations;
(f) New heating systems using
fuel oil stored in underground
storage tanks; and
(g) Petroleum product pipe-
lines.
9. Temporary Emergency Exemption
Procedure:
a. Temporary Emergency Exemption
Purpose: Temporary emergency exemp-
(Revised 6/05) 3 - 18.12
r 5309 Shilshole Avenue NW www.adolfson.com
ESA A d o l f s o n
Suite 200
J Seattle, WA 98107
206.789.9658 p•io,u;
206.789.9684 fax
June 28, 2010
Michael Benoit
City of Renton Wastewater Utility
1055 S. Grady Way
Renton, WA 98057
Subject: Lake Washington Beach Lift Station Replacement Project — Stream Study
Dear Mr. Benoit:
ESA Adolfson is pleased to present the results of our field assessment of John's Creek, which is
associated with the City of Renton's Lake Washington Beach Lift Station Replacement Project. ESA
Adolfson biologist Steven Krueger visited the project area on June 11, 2010 and the following
discussion describes the proposed action, location of the proposed action, aquatic habitat observed
within the project area, ecological functions provided by John's Creek, and potential impacts of the
proposed action upon the habitats and species that utilize the project area.
Project Location
The project area is located at 1100 Lake Washington Boulevard North (Parcel No. 3344500775) in
Renton, Washington within an existing paved parking area of Gene Coulon Memorial Beach Park (SW
% Section 5, Township 23 North, Range 5 East) (Figure 1). The project area is entirely within an
established parking area and bounded by John's Creek to the east, parking areas to the west and south,
and lawn areas to the north (Figure 2).
Project Description
The City of Renton is proposing to replace the Lake Washington Beach Lift Station (station). The
station was constructed in 1969 and currently provides sanitary sewer service to the restrooms and
bathhouse located in the south portion of Gene Coulon Memorial Beach Park (Photo 1). The existing
facility is not designed or proposed to provide for any "regional" service outside of the park usage.
The age of the facility in addition to other operations and maintenance issues have necessitated the
replacement of the facility. The uncontrolled public use of the site has caused operations problems as
parks patrons have been known to flush everything through the restrooms, up to and including bathing
suits and beach towels. This has caused periodic plugging of the pumps shutting down the station and
the need for maintenance call outs. The new station will be constructed utilizing specialized "chopper"
pumps designed to pass foreign debris and prevent clogging. In addition, the existing station is located
in the middle of the parking lot in an unsecured location. During the park's high usage periods, when
the station is going to be in most need of maintenance or repair, it is difficult to get to the station with
equipment and furthermore there is the potential for blocking patron vehicles where access is available.
r FSA Adolfson
J
Michael Benoit
June 28, 2010
Page 2
The unsecured location also results in the need for additional manpower to prevent the curious public
from approaching the opened underground structures.
The new station is proposed to be located at the outer rim of the parking area, away from the flow of
patron traffic (Photo 2). It will also be enclosed by a short fence. The new area will provide for an open
space for the crews to park their vehicle during typical maintenance activities that won't block usage by
parks patrons and act as a security barricade to prevent casual approach to the work area. The overall
project will eliminate four parking stalls and a small planter island that contains a 15" diameter
sycamore tree (Photo 2). Three parking stalls will be recovered by restriping the lot in the area.
Construction elements of the new station will include:
• The installation of an eight foot diameter underground wet well (storage) with submersible
pumps installed inside.
• The installation of an underground vault for the valving.
• Installation of approximately 50 feet of 8-inch gravity sewer main to route flows to the new
station
• Installation of a 3/-inch water service for maintenance of the site.
• Abandon the old lift station in place.
• Seal coat and restripe parking lot in the construction area.
• Installation of an above ground cabinet housing the control and telemetry panels.
• Installation of a 42-inch high fence around lift station.
Regulatory Environment
John's Creek is classified as a Class 2 Water by the City of Renton. Class 2 Waters include any
intermittent or perennial salmonid bearing waters, which are mapped on Figure Q4 (Renton Water Class
Map) as a Class 2 Water and/or that were historically and/or currently known to support sahnonids,
including resident trout, at any stage in the species life cycle (Renton Municipal Code (RMC) 4-30-
050L- I (a)(ii)). John's Creek is identified in the Renton Water Class Map as a Class 2 Water and is
known to be used by both coho salmon and sockeye salmon for spawning. Juvenile Chinook salmon are
also believed to use the lower reaches of John's Creek for rearing (Larry Fisher, Washington
Department of Fish and Wildlife (WDFW) Habitat Biologist, personal communication, June 1, 2010). A
Class 2 Water requires a 100-foot buffer extending landward from the OHWM. The entire project area
is within the buffer of John's Creek.
r ESA Adolfson
Michael Benoit
June 28, 2010
Page 3
Field Assessment
ESA Adolfson senior fisheries biologist, Steven Krueger, visited the project area on June 11, 2010 in
order to assess the habitats within John's Creek and assess functions of the riparian area. The study area
included John's Creek adjacent to the identified work area and John's Creek extending 100 feet
upstream and downstream of the project area (Figure 2). A discussion of habitat is broken down into
three reaches, which includes that portion of John's Creek extending 100 feet downstream of the
northeast comer of the project area (Reach 1), John's Creek adjacent to the project area (Reach 2), and
John's Creek extending 100 feet upstream of the southeast comer of the project area (Reach 3; Figure
2).
Reach 1
John's Creek within Reach 1 contains primarily glide habitat with an average wetted width of 20 feet
(Photo 3). The channel is confined between earthen berms (levees), presumably for flood control, on
both sides of the channel for much of the reach length; however, at the lower end of the reach the stream
has more access to floodplain habitat and the distance between the ordinary high water marks (OHWM)
is approximately 37 feet. The distance between the OHWM throughout the more confined portions of
the reach is approximately 24 feet. The average depth within the glide habitat was 1.0 foot with a
maximum depth of 1.5 feet. The dominant substrate is large gravel and cobble with a sub -dominant
substrate of sand. In general, gravels are 20 to 30 percent embedded with fines such as sand and silt.
One lateral scour pool was identified at the upstream end of the reach, which has a maximum depth of
2.5 feet and an average depth of two feet with 25 feet of associated undercut bank (Photo 4).
Riparian vegetation is generally limited to a narrow band along both banks with an average width of
approximately 25 feet. Dominant species include western red cedar (Thuja plicata), big -leaf maple
(Acer macrophyllum), vine maple (Acer circinatum), willow (Salix spp.), sword fern (Polystichum
munitum), Himalayan blackberry (Rubus armeniacus), reed canarygrass (Phalaris arundinacea),
creeping buttercup (Ranunculus repens), and giant horsetail (Equisetum telmatei) (Photo 5).
Reach 2
John's Creek within Reach 2 contains the highest diversity of habitat types including 134 feet of glide
habitat (Photo 6) and 64 feet of low -gradient riffle habitat (Photo 7). Glide habitat substrate was
dominated by large gravels with a sub -dominant substrate of sand. Gravels were highly embedded with
fines. The average depth in the glide habitat is 1.0 foot with a maximum depth of approximately 1.5
feet. The average depth in the riffle habitat is four inches with a maximum depth of six inches.
Dominant substrate in riffle habitat is large gravel with a sub -dominant substrate of sand. Gravels are
moderately embedded with fines. Riparian vegetation was similar to that of Reach 1; however, the width
r FSA Adolfson
Michael Benoit
June 28, 2010
Page 4
of riparian vegetation on the right bank (looking downstream) was slightly less than on the left bank and
varied between 15 and 20 feet.
The wetted channel width within Reach 2 varied from 10 to 12 feet. The channel throughout this reach
was confined between earthen levees with some sporadic riprap armoring. Bank undercutting was
common in many areas and is likely attributed to the highly erosive nature of the bank material and
channelization.
Reach 3
John's Creek within Reach 3 contains approximately 30 feet of low -gradient riffle habitat (Photo 8) and 70
feet of glide habitat (Photo 9). Glide habitat substrate was dominated by sand with a sub -dominant
substrate of large gravel. The average flow depth in the glide habitat is one -foot with a maximum depth
of approximately 1.5 feet. The average depth in the riffle habitat is three inches with a maximum depth
of six inches. Dominant substrate in riffle habitat is large gravel and cobble with a sub -dominant
substrate of sand. Gravels are moderately embedded with fines. Riparian vegetation composition was
similar to that of Reaches 1 and 2; however, the width of riparian vegetation was similar to that of
Reach 2.
The wetted channel width within Reach 3 varied from 10 to 12 feet. The channel throughout this reach
was confined between earthen levees with some sporadic riprap armoring. Bank undercutting was
common in many areas and is likely attributed to the highly erosive nature of the bank material and
channelization (Photo 10).
General Habitat Conditions and Functional Assessment
John's Creek flows through a highly developed area and has been subjected to alterations such as
channelization, armoring, stormwater inputs and confinement between levees for flood control purposes.
The confinement of the channel between levees has reduced the floodplain connectivity and reduced
connections with streamside wetlands, which are important for reducing stream flow during high flow
events and contributing flow through groundwater interactions between wetlands and stream during the
drier summer months.
Habitat complexity is also an issue with John's Creek. In general, there is an overall lack of structure
within the stream that would promote the formation of complex habitats such as pools. There were no
pieces of large woody debris (LWD) encountered during the site visit. LWD plays an important role in
habitat formation and the sorting of bedload material. Without LWD, the channel has a reduced
capability of pool formation and there is a reduced capability of the stream to retain spawning sized
gravels. LWD is also important for providing cover to both juvenile and adult salmonids and may also
provide flow breaks during high flow events. The narrow band of riparian vegetation adjacent to John's
Creek does provide some cover and shading for the stream and there is a potential for future LWD
recruitment; however, under existing conditions the lack of LWD is a salmonid limiting factor for this
stream.
r ESA Adolfson
Michael Benoit
June 28, 2010
Page 5
Stormwater is also a factor in overall habitat conditions. Stormwater introduced into this system has
four primary effects on habitat. During heavy rains, excess stormwater is diverted to the stream at a rate
that would not occur in an undeveloped watershed. Rainfall flows much faster off impervious surfaces
such as roadways and parking lots as opposed to falling into vegetation and being allowed to slowly
infiltrate into subsurface soils. This results in higher peak flows than that which would occur in an
undisturbed watershed. Altered peak flows can also result in excessive erosion and subsequently
increased turbidity and sedimentation of spawning gravels. Rainfall that is not allowed to infiltrate into
subsurface soils and replenish aquifers reduces the amount of groundwater and surface water exchange
during the drier summer months resulting in reduced base flows. Water quality is also an issue with
stormwater. Stormwater from roadways and parking lots are known to contribute to reduced water
quality by introducing pollutants such as fuel, oil, grease, heavy metals, and fecal coliform bacteria. At
least two stormwater outfalls were observed within Reach 2 (Photo 11).
Substrate also plays a role in the ability of the stream to function properly and contribute to the overall
productivity within the stream. The dominant substrate throughout the project area was large gravel;
however, the gravel was moderately to highly embedded with fines. Fines present within the interstitial
spaces of gravel can limit the flow of oxygen around salmonid eggs deposited within the gravel layer
resulting in reduced reproductive success. Much of the gravel present in the stream contain a thick
covering of algae or other aquatic plant growth, which may indicate several problems including
inadequate flow during the drier summer months or the presence of elevated concentrations of nutrients
(Photo 12). The confinement of the channel within the levees also prohibits the stream from migrating
within the floodplain. The ability of the channel to move limits the ability to recruit sediment, including
gravels, from other areas within the floodplain.
Fish and Wildlife Observations
John's Creek is known to be used by both coho salmon and sockeye salmon for spawning. Juvenile
Chinook salmon are also believed to use the lower reaches of John's Creek for rearing (Larry Fisher,
Washington Department of Fish and Wildlife (WDFW) Habitat Biologist, personal communication,
June 1, 2010). No observations of fish were made during the June 11, 2010 site visit; however,
spawning sized gravels are present within John's Creek and it is anticipated that adult coho and sockeye
salmon as well as resident cutthroat trout would use John's Creek for spawning and rearing. The quality
of spawning habitat has been degraded by sedimentation and dense algal growth, but spawning is still
likely to occur. The only aquatic species identified within the project area was a crayfish.
Other wildlife species observed included the northwestern crow (Corvus caurinus), chestnut -backed
chickadee (Poecile rufescens), and merlin (Falco columbarius). The merlin is a state candidate species,
but has no federal listing at this time. No observations of mammals, amphibians, or reptiles were
documented. The project area likely supports a diverse number of bird species commonly associated
with riparian habitats and is likely used by many species for breeding and foraging purposes. Mammals
having a potential to occur in the project area are those species that have become accustomed to the
r ESA Adolfson
Michael Benoit
June 28, 2010
Page 6
urban environment and may include species such as raccoons, rats, opossums, and coyotes. Use of the
project area by mammalian species is likely limited to migration and foraging. According to WDFW's
Priority Habitat and Species (PHS) database, the project area and all of Gene Coulon Memorial Beach
Park is included within an area identified as Urban Natural Open Space (UNOS). No other priority
habitats or species were identified from the PHS database in the immediate vicinity of project area.
Project Related Impacts
As discussed above in the project description, all work will occur within the currently developed portion
of Gene Coulon Memorial Beach Park and within the buffer of John's Creek. The project will be
constructed within the existing parking lot, which is completely enclosed by a continuous system of
curbing. Potential impacts of the proposed project are primarily related to soil disturbing activities,
which if not properly controlled with appropriate temporary erosion and sediment control (TESC) best
management practices (BMPs), can result in the erosion of upland soils and the subsequent delivery of
sediment laden runoff to John's Creek. Sedimentation is a concern since it can cover spawning gravels
and thereby reduce the reproductive success of salmonids using the stream. Increased turbidity is a
concern because it can interfere with the respiration of fishes, delay spawning activity, and result in
behavioral changes.
The project proponent will limit the majority of work to the paved portion of the parking lot that is
completely enclosed by curbing. The only exception to this will be the removal of a small planter island
at the south end of the proposed lift station, which will be removed to allow for the creation of
additional parking spaces to compensate for those spaces lost during the construction of the new station.
Sediment and erosion control BMPs such as straw bales or silt fencing will be in place during removal
of the planter island and until such point that a new curb is installed. No stockpiling of excavation
materials will be allowed outside of the enclosed parking area. Catch basins within the parking area that
receive runoff from the construction area will be fitted with filter fabric or other similar material to
remove any sediment from runoff. The work area will be swept and cleaned upon project completion to
remove any remaining soil.
The removal of the planter island will require the removal of one 14-inch diameter non-native
landscaping tree (sycamore) and some landscaping shrubs (Photo 2). This tree is located approximately
30 feet from the OHWM of John's Creek. The distance of the tree from the stream combined with the
minimal nutrients provided by this one tree will not likely have an adverse affect on riparian functions
within the project area. Tree removal is an allowed exemption under RMC 4-30-050C (5) a granted that
the project proponent place the tree within the riparian buffer of the stream. Since LWD is limited
within this stream, placement of the tree within the riparian buffer would contribute to improving
habitat conditions by providing cover and increased habitat complexity. While it would be beneficial to
have the removed tree placed within the stream, this may not be possible due to the existing dense
r ESA Adolfson
J
Michael Benoit
June 28, 2010
Page 7
vegetation between the project area and the stream. It is likely that more damage would be done to the
existing riparian vegetation during placement of the tree, which would outweigh any benefits provided
to the habitat and overall function of the riparian area by placing the tree within the riparian buffer. All
other trees and vegetation outside of the parking area will be unaffected by project construction.
Furthermore, all work will occur within the developed portion of the parking area protecting trees from
construction activities.
Conclusions
Overall, the proposed action will not contribute to the degradation of instream or riparian habitat within
the project area if appropriate TESC measures are in place during construction. Placement of the
removed tree within the riparian buffer or stream may provide some benefit to the stream through an
increase in habitat complexity; however, placement of the tree under existing conditions may actually
result in additional and unwarranted damage to other trees in the riparian corridor due to the existing
tree density along the stream.
Sincerely,
Steven Krueger
Senior Scientist/Managing Associate
Legend
QProject Area
Streams (King Co)
Pack Rnundary
SOURCE: Carollo, 2010; King County, 2007 (Aerial), 2009 (Streams) Lake Washington Beach Lift Station. 210352
Figure 1
Vicinity Map
Renton, Washington
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FSA A d o l f s o n 5309 Shilshole Avenue NW www.adolfson.com
Suite 200
Seattle, WA 98107
206.789.9658
206.789.9684
June 28, 2010
Michael Benoit
City of Renton Wastewater Utility
1055 S. Grady Way
Renton, WA 98057
Subject: Lake Washington Beach Lift Station Replacement Project — Stream Study
Dear Mr. Benoit:
ESA Adolfson is pleased to present the results of our field assessment of John's Creek, which is
associated with the City of Renton's Lake Washington Beach Lift Station Replacement Project. ESA
Adolfson biologist Steven Krueger visited the project area on June 11, 2010 and the following
discussion describes the proposed action, location of the proposed action, aquatic habitat observed
within the project area, ecological functions provided by John's Creek, and potential impacts of the
proposed action upon the habitats and species that utilize the project area.
Project Location
The project area is located at 1100 Lake Washington Boulevard North (Parcel No. 3344500775) in
Renton, Washington within an existing paved parking area of Gene Coulon Memorial Beach Park (SW
'/4 Section 5, Township 23 North, Range 5 East) (Figure 1). The project area is entirely within an
established parking area and bounded by John's Creek to the east, parking areas to the west and south,
and lawn areas to the north (Figure 2).
Project Description
The City of Renton is proposing to replace the Lake Washington Beach Lift Station (station). The
station was constructed in 1969 and currently provides sanitary sewer service to the restrooms and
bathhouse located in the south portion of Gene Coulon Memorial Beach Park (Photo 1). The existing
facility is not designed or proposed to provide for any "regional" service outside of the park usage.
The age of the facility in addition to other operations and maintenance issues have necessitated the
replacement of the facility. The uncontrolled public use of the site has caused operations problems as
parks patrons have been known to flush everything through the restrooms, up to and including bathing
suits and beach towels. This has caused periodic plugging of the pumps shutting down the station and
the need for maintenance call outs. The new station will be constructed utilizing specialized "chopper"
pumps designed to pass foreign debris and prevent clogging. In addition, the existing station is located
in the middle of the parking lot in an unsecured location. During the park's high usage periods, when
the station is going to be in most need of maintenance or repair, it is difficult to get to the station with
equipment and furthermore there is the potential for blocking patron vehicles where access is available.
r ESAAdolfson
J
Michael Benoit
June 28, 2010
Page 2
The unsecured location also results in the need for additional manpower to prevent the curious public
from approaching the opened underground structures.
The new station is proposed to be located at the outer rim of the parking area, away from the flow of
patron traffic (Photo 2). It will also be enclosed by a short fence. The new area will provide for an open
space for the crews to park their vehicle during typical maintenance activities that won't block usage by
parks patrons and act as a security barricade to prevent casual approach to the work area. The overall
project will eliminate four parking stalls and a small planter island that contains a 15" diameter
sycamore tree (Photo 2). Three parking stalls will be recovered by restriping the lot in the area.
Construction elements of the new station will include:
• The installation of an eight foot diameter underground wet well (storage) with submersible
pumps installed inside.
• The installation of an underground vault for the valving.
• Installation of approximately 50 feet of 8-inch gravity sewer main to route flows to the new
station
• Installation of a 3/a-inch water service for maintenance of the site.
• Abandon the old lift station in place.
• Seal coat and restripe parking lot in the construction area.
• Installation of an above ground cabinet housing the control and telemetry panels.
• Installation of a 42-inch high fence around lift station.
Regulatory Environment
John's Creek is classified as a Class 2 Water by the City of Renton. Class 2 Waters include any
intermittent or perennial salmonid bearing waters, which are mapped on Figure Q4 (Renton Water Class
Map) as a Class 2 Water and/or that were historically and/or currently known to support salmonids,
including resident trout, at any stage in the species life cycle (Renton Municipal Code (RMC) 4-30-
050L-1(a)(ii)). John's Creek is identified in the Renton Water Class Map as a Class 2 Water and is
known to be used by both coho salmon and sockeye salmon for spawning. Juvenile Chinook salmon are
also believed to use the lower reaches of John's Creek for rearing (Larry Fisher, Washington
Department of Fish and Wildlife (WDFW) Habitat Biologist, personal communication, June 1, 2010). A
Class 2 Water requires a 100-foot buffer extending landward from the OHWM. The entire project area
is within the buffer of John's Creek.
r ESAAdolfson
Michael Benoit
June 28, 2010
Page 3
Field Assessment
ESA Adolfson senior fisheries biologist, Steven Krueger, visited the project area on June 11, 2010 in
order to assess the habitats within John's Creek and assess functions of the riparian area. The study area
included John's Creek adjacent to the identified work area and John's Creek extending 100 feet
upstream and downstream of the project area (Figure 2). A discussion of habitat is broken down into
three reaches, which includes that portion of John's Creek extending 100 feet downstream of the
northeast corner of the project area (Reach 1), John's Creek adjacent to the project area (Reach 2), and
John's Creek extending 100 feet upstream of the southeast corner of the project area (Reach 3; Figure
2).
Reach 1
John's Creek within Reach 1 contains primarily glide habitat with an average wetted width of 20 feet
(Photo 3). The channel is confined between earthen berms (levees), presumably for flood control, on
both sides of the channel for much of the reach length; however, at the lower end of the reach the stream
has more access to floodplain habitat and the distance between the ordinary high water marks (OHWM)
is approximately 37 feet. The distance between the OHWM throughout the more confined portions of
the reach is approximately 24 feet. The average depth within the glide habitat was 1.0 foot with a
maximum depth of 1.5 feet. The dominant substrate is large gravel and cobble with a sub -dominant
substrate of sand. In general, gravels are 20 to 30 percent embedded with fines such as sand and silt.
One lateral scour pool was identified at the upstream end of the reach, which has a maximum depth of
2.5 feet and an average depth of two feet with 25 feet of associated undercut bank (Photo 4).
Riparian vegetation is generally limited to a narrow band along both banks with an average width of
approximately 25 feet. Dominant species include western red cedar (Thuja plicata), big -leaf maple
(Acer macrophyllum), vine maple (Acer circinatum), willow (Salix spp.), sword fern (Polystichum
munitum), Himalayan blackberry (Rubus armeniacus), reed canarygrass (Phalaris arundinacea),
creeping buttercup (Ranunculus repens), and giant horsetail (Equisetum telmatei) (Photo 5).
Reach 2
John's Creek within Reach 2 contains the highest diversity of habitat types including 134 feet of glide
habitat (Photo 6) and 64 feet of low -gradient riffle habitat (Photo 7). Glide habitat substrate was
dominated by large gravels with a sub -dominant substrate of sand. Gravels were highly embedded with
fines. The average depth in the glide habitat is 1.0 foot with a maximum depth of approximately 1.5
feet. The average depth in the riffle habitat is four inches with a maximum depth of six inches.
Dominant substrate in riffle habitat is large gravel with a sub -dominant substrate of sand. Gravels are
moderately embedded with fines. Riparian vegetation was similar to that of Reach 1; however, the width
r ESA Adolfson
Michael Benoit
June 28, 2010
Page 4
of riparian vegetation on the right bank (looking downstream) was slightly less than on the left bank and
varied between 15 and 20 feet.
The wetted channel width within Reach 2 varied from 10 to 12 feet. The channel throughout this reach
was confined between earthen levees with some sporadic riprap armoring. Bank undercutting was
common in many areas and is likely attributed to the highly erosive nature of the bank material and
channelization.
Reach 3
John's Creek within Reach 3 contains approximately 30 feet of low -gradient riffle habitat (Photo 8) and 70
feet of glide habitat (Photo 9). Glide habitat substrate was dominated by sand with a sub -dominant
substrate of large gravel. The average flow depth in the glide habitat is one -foot with a maximum depth
of approximately 1.5 feet. The average depth in the riffle habitat is three inches with a maximum depth
of six inches. Dominant substrate in riffle habitat is large gravel and cobble with a sub -dominant
substrate of sand. Gravels are moderately embedded with fines. Riparian vegetation composition was
similar to that of Reaches 1 and 2; however, the width of riparian vegetation was similar to that of
Reach 2.
The wetted channel width within Reach 3 varied from 10 to 12 feet. The channel throughout this reach
was confined between earthen levees with some sporadic riprap armoring. Bank undercutting was
common in many areas and is likely attributed to the highly erosive nature of the bank material and
channelization (Photo 10).
General Habitat Conditions and Functional Assessment
John's Creek flows through a highly developed area and has been subjected to alterations such as
channelization, armoring, stormwater inputs and confinement between levees for flood control purposes.
The confinement of the channel between levees has reduced the floodplain connectivity and reduced
connections with streamside wetlands, which are important for reducing stream flow during high flow
events and contributing flow through groundwater interactions between wetlands and stream during the
drier summer months.
Habitat complexity is also an issue with John's Creek. In general, there is an overall lack of structure
within the stream that would promote the formation of complex habitats such as pools. There were no
pieces of large woody debris (L)VD) encountered during the site visit. LWD plays an important role in
habitat formation and the sorting of bedload material. Without LWD, the channel has a reduced
capability of pool formation and there is a reduced capability of the stream to retain spawning sized
gravels. LWD is also important for providing cover to both juvenile and adult salmonids and may also
provide flow breaks during high flow events. The narrow band of riparian vegetation adjacent to John's
Creek does provide some cover and shading for the stream and there is a potential for future LWD
recruitment; however, under existing conditions the lack of LWD is a salmonid limiting factor for this
stream.
r ESAAdolfson
Michael Benoit
June 28, 2010
Page 5
Stormwater is also a factor in overall habitat conditions. Stormwater introduced into this system has
four primary effects on habitat. During heavy rains, excess stormwater is diverted to the stream at a rate
that would not occur in an undeveloped watershed. Rainfall flows much faster off impervious surfaces
such as roadways and parking lots as opposed to falling into vegetation and being allowed to slowly
infiltrate into subsurface soils. This results in higher peak flows than that which would occur in an
undisturbed watershed. Altered peak flows can also result in excessive erosion and subsequently
increased turbidity and sedimentation of spawning gravels. Rainfall that is not allowed to infiltrate into
subsurface soils and replenish aquifers reduces the amount of groundwater and surface water exchange
during the drier summer months resulting in reduced base flows. Water quality is also an issue with
stormwater. Stormwater from roadways and parking lots are known to contribute to reduced water
quality by introducing pollutants such as fuel, oil, grease, heavy metals, and fecal coliform bacteria. At
least two stormwater outfalls were observed within Reach 2 (Photo 11).
Substrate also plays a role in the ability of the stream to function properly and contribute to the overall
productivity within the stream. The dominant substrate throughout the project area was large gravel;
however, the gravel was moderately to highly embedded with fines. Fines present within the interstitial
spaces of gravel can limit the flow of oxygen around salmonid eggs deposited within the gravel layer
resulting in reduced reproductive success. Much of the gravel present in the stream contain a thick
covering of algae or other aquatic plant growth, which may indicate several problems including
inadequate flow during the drier summer months or the presence of elevated concentrations of nutrients
(Photo 12). The confinement of the channel within the levees also prohibits the stream from migrating
within the floodplain. The ability of the channel to move limits the ability to recruit sediment, including
gravels, from other areas within the floodplain.
Fish and Wildlife Observations
John's Creek is known to be used by both coho salmon and sockeye salmon for spawning. Juvenile
Chinook salmon are also believed to use the lower reaches of John's Creek for rearing (Larry Fisher,
Washington Department of Fish and Wildlife (WDFW) Habitat Biologist, personal communication,
June 1, 2010). No observations of fish were made during the June 11, 2010 site visit; however,
spawning sized gravels are present within John's Creek and it is anticipated that adult coho and sockeye
salmon as well as resident cutthroat trout would use John's Creek for spawning and rearing. The quality
of spawning habitat has been degraded by sedimentation and dense algal growth, but spawning is still
likely to occur. The only aquatic species identified within the project area was a crayfish.
Other wildlife species observed included the northwestern crow (Corvus caurinus), chestnut -backed
chickadee (Poecile rufescens), and merlin (Falco columbarius). The merlin is a state candidate species,
but has no federal listing at this time. No observations of mammals, amphibians, or reptiles were
documented. The project area likely supports a diverse number of bird species commonly associated
with riparian habitats and is likely used by many species for breeding and foraging purposes. Mammals
having a potential to occur in the project area are those species that have become accustomed to the
r ESAAdolfson
Michael Benoit
June 28, 2010
Page 6
urban environment and may include species such as raccoons, rats, opossums, and coyotes. Use of the
project area by mammalian species is likely limited to migration and foraging. According to WDFW's
Priority Habitat and Species (PHS) database, the project area and all of Gene Coulon Memorial Beach
Park is included within an area identified as Urban Natural Open Space (UNOS). No other priority
habitats or species were identified from the PHS database in the immediate vicinity of project area.
Project Related Impacts
As discussed above in the project description, all work will occur within the currently developed portion
of Gene Coulon Memorial Beach Park and within the buffer of John's Creek. The project will be
constructed within the existing parking lot, which is completely enclosed by a continuous system of
curbing. Potential impacts of the proposed project are primarily related to soil disturbing activities,
which if not properly controlled with appropriate temporary erosion and sediment control (TESC) best
management practices (BMPs), can result in the erosion of upland soils and the subsequent delivery of
sediment laden runoff to John's Creek. Sedimentation is a concern since it can cover spawning gravels
and thereby reduce the reproductive success of salmonids using the stream. Increased turbidity is a
concern because it can interfere with the respiration of fishes, delay spawning activity, and result in
behavioral changes.
The project proponent will limit the majority of work to the paved portion of the parking lot that is
completely enclosed by curbing. The only exception to this will be the removal of a small planter island
at the south end of the proposed lift station, which will be removed to allow for the creation of
additional parking spaces to compensate for those spaces lost during the construction of the new station.
Sediment and erosion control BMPs such as straw bales or silt fencing will be in place during removal
of the planter island and until such point that a new curb is installed. No stockpiling of excavation
materials will be allowed outside of the enclosed parking area. Catch basins within the parking area that
receive runoff from the construction area will be fitted with filter fabric or other similar material to
remove any sediment from runoff. The work area will be swept and cleaned upon project completion to
remove any remaining soil.
The removal of the planter island will require the removal of one 14-inch diameter non-native
landscaping tree (sycamore) and some landscaping shrubs (Photo 2). This tree is located approximately
30 feet from the OHWM of John's Creek. The distance of the tree from the stream combined with the
minimal nutrients provided by this one tree will not likely have an adverse affect on riparian functions
within the project area. Tree removal is an allowed exemption under RMC 4-30-050C (5) a granted that
the project proponent place the tree within the riparian buffer of the stream. Since LWD is limited
within this stream, placement of the tree within the riparian buffer would contribute to improving
habitat conditions by providing cover and increased habitat complexity. While it would be beneficial to
have the removed tree placed within the stream, this may not be possible due to the existing dense
r ESA Adolfson
J
Michael Benoit
June 28, 2010
Page 7
vegetation between the project area and the stream. It is likely that more damage would be done to the
existing riparian vegetation during placement of the tree, which would outweigh any benefits provided
to the habitat and overall function of the riparian area by placing the tree within the riparian buffer. All
other trees and vegetation outside of the parking area will be unaffected by project construction.
Furthermore, all work will occur within the developed portion of the parking area protecting trees from
construction activities.
Conclusions
Overall, the proposed action will not contribute to the degradation of instream or riparian habitat within
the project area if appropriate TESC measures are in place during construction. Placement of the
removed tree within the riparian buffer or stream may provide some benefit to the stream through an
increase in habitat complexity; however, placement of the tree under existing conditions may actually
result in additional and unwarranted damage to other trees in the riparian corridor due to the existing
tree density along the stream.
Sincerely,
Steven Krueger
Senior Scientist/Managing Associate
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r ESA Adolfson
J
June 28, 2010
Michael Benoit
City of Renton Wastewater Utility
1055 S. Grady Way
Renton, WA 98057
5309 Shilshole Avenue NW
Suite 200
Seattle, WA 98107
206.789.9658 phone
206.789.9684 fax
Subject: Lake Washington Beach Lift Station Replacement Project — Stream Study
Dear Mr. Benoit:
www.adolfson.com
ESA Adolfson is pleased to present the results of our field assessment of John's Creek, which is
associated with the City of Renton's Lake Washington Beach Lift Station Replacement Project. ESA
Adolfson biologist Steven Krueger visited the project area on June 11, 2010 and the following
discussion describes the proposed action, location of the proposed action, aquatic habitat observed
within the project area, ecological functions provided by John's Creek, and potential impacts of the
proposed action upon the habitats and species that utilize the project area.
Project Location
The project area is located at 1100 Lake Washington Boulevard North (Parcel No. 3344500775) in
Renton, Washington within an existing paved parking area of Gene Coulon Memorial Beach Park (SW
'/4 Section 5, Township 23 North, Range 5 East) (Figure 1). The project area is entirely within an
established parking area and bounded by John's Creek to the east, parking areas to the west and south,
and lawn areas to the north (Figure 2).
Project Description
The City of Renton is proposing to replace the Lake Washington Beach Lift Station (station). The
station was constructed in 1969 and currently provides sanitary sewer service to the restrooms and
bathhouse located in the south portion of Gene Coulon Memorial Beach Park (Photo 1). The existing
facility is not designed or proposed to provide for any "regional" service outside of the park usage.
The age of the facility in addition to other operations and maintenance issues have necessitated the
replacement of the facility. The uncontrolled public use of the site has caused operations problems as
parks patrons have been known to flush everything through the restrooms, up to and including bathing
suits and beach towels. This has caused periodic plugging of the pumps shutting down the station and
the need for maintenance call outs. The new station will be constructed utilizing specialized "chopper"
pumps designed to pass foreign debris and prevent clogging. In addition, the existing station is located
in the middle of the parking lot in an unsecured location. During the park's high usage periods, when
the station is going to be in most need of maintenance or repair, it is difficult to get to the station with
equipment and furthermore there is the potential for blocking patron vehicles where access is available.
r ESA Adolfson
Michael Benoit
June 28, 2010
Page 2
The unsecured location also results in the need for additional manpower to prevent the curious public
from approaching the opened underground structures.
The new station is proposed to be located at the outer rim of the parking area, away from the flow of
patron traffic (Photo 2). It will also be enclosed by a short fence. The new area will provide for an open
space for the crews to park their vehicle during typical maintenance activities that won't block usage by
parks patrons and act as a security barricade to prevent casual approach to the work area. The overall
project will eliminate four parking stalls and a small planter island that contains a 15" diameter
sycamore tree (Photo 2). Three parking stalls will be recovered by restriping the lot in the area.
Construction elements of the new station will include:
• The installation of an eight foot diameter underground wet well (storage) with submersible
pumps installed inside.
• The installation of an underground vault for the valuing.
• Installation of approximately 50 feet of 8-inch gravity sewer main to route flows to the new
station
• Installation of a 3/4-inch water service for maintenance of the site.
• Abandon the old lift station in place.
• Seal coat and restripe parking lot in the construction area.
• Installation of an above ground cabinet housing the control and telemetry panels.
• Installation of a 42-inch high fence around lift station.
Regulatory Environment
John's Creek is classified as a Class 2 Water by the City of Renton. Class 2 Waters include any
intermittent or perennial salmonid bearing waters, which are mapped on Figure Q4 (Renton Water Class
Map) as a Class 2 Water and/or that were historically and/or currently known to support salmonids,
including resident trout, at any stage in the species life cycle (Renton Municipal Code (RMC) 4-30-
050L-l(a)(ii)). John's Creek is identified in the Renton Water Class Map as a Class 2 Water and is
known to be used by both coho salmon and sockeye salmon for spawning. Juvenile Chinook salmon are
also believed to use the lower reaches of John's Creek for rearing (Larry Fisher, Washington
Department of Fish and Wildlife (WDFW) Habitat Biologist, personal communication, June 1, 2010). A
Class 2 Water requires a 100-foot buffer extending landward from the OHWM. The entire project area
is within the buffer of John's Creek.
r ESA Adollson
Michael Benoit
June 28, 2010
Page 3
Field Assessment
ESA Adolfson senior fisheries biologist, Steven Krueger, visited the project area on June 11, 2010 in
order to assess the habitats within John's Creek and assess functions of the riparian area. The study area
included John's Creek adjacent to the identified work area and John's Creek extending 100 feet
upstream and downstream of the project area (Figure 2). A discussion of habitat is broken down into
three reaches, which includes that portion of John's Creek extending 100 feet downstream of the
northeast corner of the project area (Reach 1), John's Creek adjacent to the project area (Reach 2), and
John's Creek extending 100 feet upstream of the southeast comer of the project area (Reach 3; Figure
2).
Reach 1
John's Creek within Reach 1 contains primarily glide habitat with an average wetted width of 20 feet
(Photo 3). The channel is confined between earthen berms (levees), presumably for flood control, on
both sides of the channel for much of the reach length; however, at the lower end of the reach the stream
has more access to floodplain habitat and the distance between the ordinary high water marks (OHWM)
is approximately 37 feet. The distance between the OHWM throughout the more confined portions of
the reach is approximately 24 feet. The average depth within the glide habitat was 1.0 foot with a
maximum depth of 1.5 feet. The dominant substrate is large gravel and cobble with a sub -dominant
substrate of sand. In general, gravels are 20 to 30 percent embedded with fines such as sand and silt.
One lateral scour pool was identified at the upstream end of the reach, which has a maximum depth of
2.5 feet and an average depth of two feet with 25 feet of associated undercut bank (Photo 4).
Riparian vegetation is generally limited to a narrow band along both banks with an average width of
approximately 25 feet. Dominant species include western red cedar (Thuja plicata), big -leaf maple
(Acer macrophyllum), vine maple (Acer circinatum), willow (Salix spp.), sword fern (Polystichum
munitum), Himalayan blackberry (Rebus armeniacus), reed canarygrass (Phalaris arundinacea),
creeping buttercup (Ranunculus repens), and giant horsetail (Equisetum telmatei) (Photo 5).
Reach 2
John's Creek within Reach 2 contains the highest diversity of habitat types including 134 feet of glide
habitat (Photo 6) and 64 feet of low -gradient riffle habitat (Photo 7). Glide habitat substrate was
dominated by large gravels with a sub -dominant substrate of sand. Gravels were highly embedded with
fines. The average depth in the glide habitat is 1.0 foot with a maximum depth of approximately 1.5
feet. The average depth in the riffle habitat is four inches with a maximum depth of six inches.
Dominant substrate in riffle habitat is large gravel with a sub -dominant substrate of sand. Gravels are
moderately embedded with fines. Riparian vegetation was similar to that of Reach 1; however, the width
r ESA Adolfson
J
Michael Benoit
June 28, 2010
Page 4
of riparian vegetation on the right bank (looking downstream) was slightly less than on the left bank and
varied between 15 and 20 feet.
The wetted channel width within Reach 2 varied from 10 to 12 feet. The channel throughout this reach
was confined between earthen levees with some sporadic riprap armoring. Bank undercutting was
common in many areas and is likely attributed to the highly erosive nature of the bank material and
channelization.
Reach 3
John's Creek within Reach 3 contains approximately 30 feet of low -gradient riffle habitat (Photo 8) and 70
feet of glide habitat (Photo 9). Glide habitat substrate was dominated by sand with a sub -dominant
substrate of large gravel. The average flow depth in the glide habitat is one -foot with a maximum depth
of approximately 1.5 feet. The average depth in the riffle habitat is three inches with a maximum depth
of six inches. Dominant substrate in riffle habitat is large gravel and cobble with a sub -dominant
substrate of sand. Gravels are moderately embedded with fines. Riparian vegetation composition was
similar to that of Reaches 1 and 2; however, the width of riparian vegetation was similar to that of
Reach 2.
The wetted channel width within Reach 3 varied from 10 to 12 feet. The channel throughout this reach
was confined between earthen levees with some sporadic riprap armoring. Bank undercutting was
common in many areas and is likely attributed to the highly erosive nature of the bank material and
channelization (Photo 10).
General Habitat Conditions and Functional Assessment
John's Creek flows through a highly developed area and has been subjected to alterations such as
channelization, armoring, stormwater inputs and confinement between levees for flood control purposes.
The confinement of the channel between levees has reduced the floodplain connectivity and reduced
connections with streamside wetlands, which are important for reducing stream flow during high flow
events and contributing flow through groundwater interactions between wetlands and stream during the
drier summer months.
Habitat complexity is also an issue with John's Creek. In general, there is an overall lack of structure
within the stream that would promote the formation of complex habitats such as pools. There were no
pieces of large woody debris (LWD) encountered during the site visit. LWD plays an important role in
habitat formation and the sorting of bedload material. Without LWD, the channel has a reduced
capability of pool formation and there is a reduced capability of the stream to retain spawning sized
gravels. LWD is also important for providing cover to both juvenile and adult salmonids and may also
provide flow breaks during high flow events. The narrow band of riparian vegetation adjacent to John's
Creek does provide some cover and shading for the stream and there is a potential for future LWD
recruitment; however, under existing conditions the lack of LWD is a salmonid limiting factor for this
stream.
ESA Adoifson
J
Michael Benoit
June 28, 2010
Page 5
Stormwater is also a factor in overall habitat conditions. Stormwater introduced into this system has
four primary effects on habitat. During heavy rains, excess stormwater is diverted to the stream at a rate
that would not occur in an undeveloped watershed. Rainfall flows much faster off impervious surfaces
such as roadways and parking lots as opposed to falling into vegetation and being allowed to slowly
infiltrate into subsurface soils. This results in higher peak flows than that which would occur in an
undisturbed watershed. Altered peak flows can also result in excessive erosion and subsequently
increased turbidity and sedimentation of spawning gravels. Rainfall that is not allowed to infiltrate into
subsurface soils and replenish aquifers reduces the amount of groundwater and surface water exchange
during the drier summer months resulting in reduced base flows. Water quality is also an issue with
stormwater. Stormwater from roadways and parking lots are known to contribute to reduced water
quality by introducing pollutants such as fuel, oil, grease, heavy metals, and fecal coliform bacteria. At
least two stormwater outfalls were observed within Reach 2 (Photo 11).
Substrate also plays a role in the ability of the stream to function properly and contribute to the overall
productivity within the stream. The dominant substrate throughout the project area was large gravel;
however, the gravel was moderately to highly embedded with fines. Fines present within the interstitial
spaces of gravel can limit the flow of oxygen around salmonid eggs deposited within the gravel layer
resulting in reduced reproductive success. Much of the gravel present in the stream contain a thick
covering of algae or other aquatic plant growth, which may indicate several problems including
inadequate flow during the drier summer months or the presence of elevated concentrations of nutrients
(Photo 12). The confinement of the channel within the levees also prohibits the stream from migrating
within the floodplain. The ability of the channel to move limits the ability to recruit sediment, including
gravels, from other areas within the floodplain.
Fish and Wildlife Observations
John's Creek is known to be used by both coho salmon and sockeye salmon for spawning. Juvenile
Chinook salmon are also believed to use the lower reaches of John's Creek for rearing (Larry Fisher,
Washington Department of Fish and Wildlife (WDFW) Habitat Biologist, personal communication,
June 1, 2010). No observations of fish were made during the June 11, 2010 site visit; however,
spawning sized gravels are present within John's Creek and it is anticipated that adult coho and sockeye
salmon as well as resident cutthroat trout would use John's Creek for spawning and rearing. The quality
of spawning habitat has been degraded by sedimentation and dense algal growth, but spawning is still
likely to occur. The only aquatic species identified within the project area was a crayfish.
Other wildlife species observed included the northwestern crow (Corvus caurinus), chestnut -backed
chickadee (Poecile rufescens), and merlin (Falco columbarius). The merlin is a state candidate species,
but has no federal listing at this time. No observations of mammals, amphibians, or reptiles were
documented. The project area likely supports a diverse number of bird species commonly associated
with riparian habitats and is likely used by many species for breeding and foraging purposes. Mammals
having a potential to occur in the project area are those species that have become accustomed to the
ESA Adolfson
J
Michael Benoit
June 28, 2010
Page 6
urban environment and may include species such as raccoons, rats, opossums, and coyotes. Use of the
project area by mammalian species is likely limited to migration and foraging. According to WDFW's
Priority Habitat and Species (PHS) database, the project area and all of Gene Coulon Memorial Beach
Park is included within an area identified as Urban Natural Open Space (UNOS). No other priority
habitats or species were identified from the PHS database in the immediate vicinity of project area.
Project Related Impacts
As discussed above in the project description, all work will occur within the currently developed portion
of Gene Coulon Memorial Beach Park and within the buffer of John's Creek. The project will be
constructed within the existing parking lot, which is completely enclosed by a continuous system of
curbing. Potential impacts of the proposed project are primarily related to soil disturbing activities,
which if not properly controlled with appropriate temporary erosion and sediment control (TESC) best
management practices (BMPs), can result in the erosion of upland soils and the subsequent delivery of
sediment laden runoff to John's Creek. Sedimentation is a concern since it can cover spawning gravels
and thereby reduce the reproductive success of salmonids using the stream. Increased turbidity is a
concern because it can interfere with the respiration of fishes, delay spawning activity, and result in
behavioral changes.
The project proponent will limit the majority of work to the paved portion of the parking lot that is
completely enclosed by curbing. The only exception to this will be the removal of a small planter island
at the south end of the proposed lift station, which will be removed to allow for the creation of
additional parking spaces to compensate for those spaces lost during the construction of the new station.
Sediment and erosion control BMPs such as straw bales or silt fencing will be in place during removal
of the planter island and until such point that a new curb is installed. No stockpiling of excavation
materials will be allowed outside of the enclosed parking area. Catch basins within the parking area that
receive runoff from the construction area will be fitted with filter fabric or other similar material to
remove any sediment from runoff. The work area will be swept and cleaned upon project completion to
remove any remaining soil.
The removal of the planter island will require the removal of one 14-inch diameter non-native
landscaping tree (sycamore) and some landscaping shrubs (Photo 2). This tree is located approximately
30 feet from the OHWM of John's Creek. The distance of the tree from the stream combined with the
minimal nutrients provided by this one tree will not likely have an adverse affect on riparian functions
within the project area. Tree removal is an allowed exemption under RMC 4-30-050C (5) a granted that
the project proponent place the tree within the riparian buffer of the stream. Since LWD is limited
within this stream, placement of the tree within the riparian buffer would contribute to improving
habitat conditions by providing cover and increased habitat complexity. While it would be beneficial to
have the removed tree placed within the stream, this may not be possible due to the existing dense
r ESA Adolfson
Michael Benoit
June 28, 2010
Page 7
vegetation between the project area and the stream. It is likely that more damage would be done to the
existing riparian vegetation during placement of the tree, which would outweigh any benefits provided
to the habitat and overall function of the riparian area by placing the tree within the riparian buffer. All
other trees and vegetation outside of the parking area will be unaffected by project construction.
Furthermore, all work will occur within the developed portion of the parking area protecting trees from
construction activities.
Conclusions
Overall, the proposed action will not contribute to the degradation of instream or riparian habitat within
the project area if appropriate TESC measures are in place during construction. Placement of the
removed tree within the riparian buffer or stream may provide some benefit to the stream through an
increase in habitat complexity; however, placement of the tree under existing conditions may actually
result in additional and unwarranted damage to other trees in the riparian corridor due to the existing
tree density along the stream.
Sincerely,
Steven Krueger
Senior Scientist/Managing Associate
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Photo 2. Location for new lift station.
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Michael A Benoit
From:
Rocale Timmons
Sent:
Wednesday, July 28, 2010 10:16 AM
To:
Michael A Benoit
Subject:
Submittal
Waiver Form: If you received a waiver form during or after a "pre -application meeting", please provide 5
copies of this form.
Land Use Permit Master Application Form: Please provide the original plus 11 copies of the
COMPLETED City of Renton Planning Division's Master Application form. Application must have
notarized signatures of ALL current property owners listed on the Title Report. If the property owner is a
corporation, the authorized representative must attach proof of signing authority on behalf of the
corporation. The legal description of the property must be attached to the application form.
Request For Critical Areas Exemption Form (SEPA Exempt Activities): Please provide 3 copies of the
attached Critical Areas Exemption form if the project consists of one of the listed activities eligible for
SEPA exemption.
Site Plan: Please provide 12 copies of a fully -dimensioned plan sheet drawn at a scale of 1"=20' (or other
scale approved by the Planning Division). We prefer the site plan be drawn on one sheet of paper unless
the size of the site requires several plan sheets to be used. If you are using more than a single plan
sheet, please indicate connecting points on each sheet.
The Site Plan should show the following:
• Name of proposed project
• Date, scale, and north arrow (oriented to the top of the paper/plan sheet)
• Drawing of the subject property with all property lines dimensioned and names of adjacent
streets
• Widths of all adjacent streets and alleys
• Location of all existing public improvements including, but not limited to, curbs, gutters,
sidewalks, median islands, street trees, fire hydrants, utility poles, etc., along the full property
frontage
• Location and dimensions of existing and proposed:
1. structures
2. setbacks
3. parking, off-street loading space, curb cuts and aisle ways
4. fencing and retaining walls
5. free-standing signs and lighting fixtures
6. refuse and recycling areas
7. utility junction boxes and public utility transformers
8. storage areas and job shacks/sales trailers/model homes
• Location and dimensions of all easements referenced in the title report with the recording
number and type of easement (e.g. access, sewer, etc.) indicated
• Location and dimensions of natural features such as streams, lakes, required buffer areas,
open spaces, and wetlands
0 Ordinary high water mark and distance to closest area of work for any project located within
200-feet from a lake or stream
A legend/analysis of the following information MUST be included on the site plan:
• Total square footage of the site
• Total impervious surfacing. List the square footage of both existing impervious area to
remain plus new impervious areas to be installed, and the total square footage of parking
areas
• Square footage of all landscaping (total, interior of parking lot, and wildlife habitat/natural
areas)
• Allowable and proposed building heights
• Square footage of any on -site critical areas
• Parking analysis including the following:
1. Number of stalls required by Code (if more than one use/ratio show required number for
each use
2. Total number of stalls proposed (if less or more than total required attach a request for a
parking modification to the application package
3. Location and number of "ADA accessible" stalls, compact, employee and/or guest
parking stalls, and parking space dimensions
4. Sizes of various types of stalls proposed
5. Angle of stalls (if other than 90 degrees)
6. Location and size of curb cuts
7. Traffic flow within the parking, loading, maneuvering areas, ingress and egress
8. Location of wheel stops
9. Loading space(s) location and dimensions
10. Number of stacking space(s) for any drive -up windows
11. Location and dimensions of any bicycle racks, bus shelters, carpool parking spaces, or
facilities designed to accommodate access to the site.
Neighborhood Detail Map: Please provide 12 copies of a map drawn at a scale of 1" = 100' or 1" = 200'
(or other scale approved by the Planning Division) to be used to identify the site location on public
notices and to review compatibility with surrounding land uses. The map shall identify the subject site
with a much darker perimeter line than surrounding properties and include at least two cross streets in
all directions showing the location of the subject site relative to property boundaries of surrounding
parcels. The map shall also show: the property's lot lines, lot lines of surrounding properties, boundaries
of the City of Renton (if applicable), north arrow (oriented to the top of the plan sheet), graphic scale
used for the map, and City of Renton (not King County) street names for all streets shown. Please ensure
all information fits on a single map sheet.
Kroll Map Company (206-448-6277) produces maps that may serve this purpose or you may use the King
County Assessor's maps as a base for the Neighborhood Detail Map. Additional information (i.e. current
city street names) will need to be added by the applicant.
Standard Stream or Lake Study: Please provide 12 copies of a report containing the information
specified in RMC Section 4-8-120D. In addition, if the project involves an unclassified stream, a
supplemental stream or lake study is also required (12 copies). If any alteration to a water -body or
buffer is proposed a supplemental stream or lake study (12 copies) and a mitigation plan (12 copies)
are also required. See RMC 4-8-120D for plan content requirements.
Grading Plan, Detailed: Please provide 12 copies of a 22" x 34" plan drawn by a State of Washington
Licensed civil engineer or landscape architect at a scale of one inch to forty feet clearly indicating the
following:
• Graphic scale and north arrow
• Dimensions of all property lines, easements, and abutting streets
• Location and dimension of all on -site structures and the location of any structures within 15-feet
of the subject property or that may be affected by the proposed work
• Accurate existing and proposed contour lines drawn at two -foot, or less, intervals showing
existing ground and details of terrain and area drainage to include surrounding off -site contours
within 100-feet of the site
• Location of natural drainage systems, including perennial and intermittent streams and the
presence of bordering vegetation
• Setback areas and any areas not to be disturbed
• Finished contours drawn at two -foot intervals as a result of grading
• Proposed drainage channels and related construction with associated underground storm lines
sized and connections shown
• Finished floor elevation(s) of all structures, existing and proposed
General notes addressing the following (may be listed on a cover sheet):
• Area in square feet of the entire property
• Area of work in square feet
• Both the number of tons and cubic yards of soil to be added, removed, or relocated
• Type and location of fill origin, and destination of any soil to be removed from site
Topography Map: Please provide 4 copies of a plan showing the site's existing contour lines at five-foot
vertical intervals.
Plan Reductions: Please provide one 8 %" x 11" legible reduction of each full size plan sheet (unless
waived by your City of Renton Project Manager). The sheets that are always needed in reduced form
are: landscape plans, conceptual utility plans, site plan or plat plan, neighborhood detail map,
topography map, tree cutting/land clearing plan, critical areas plans, grading plan, and building
elevations. These reductions are used to prepare public notice posters and to provide the public with
information about the project. The quality of these reductions must be good enough so that a
photocopy of the reduced plan sheet is also legible. The reduced plans are typically sent in PDF format
to the print shop and then are printed on opaque white mylar-type paper (aka rhino cover) to ensure
legibility. If your reduced plans are not legible once photocopied, you will need to increase the font size
or try a different paper type. Illegible reductions cannot be accepted
Rocale Timmons
City of Renton - Current Planning
Associate Planner
1055 South Grady Way
Renton, WA 98057
Tel: (425) 430-7219
Fax: (425) 430-7300
rtimmons@rentonwa.gov