HomeMy WebLinkAboutReport 010 0
CITY OF RENTON
DEPARTMENT OF COMMUNITY & ECONOMIC
DEVELOPMENT
MEMORANDUM
Date: October 27, 2010
To: City Clerk's Office
From: Stacy M Tucker
Subject: Land Use File Closeout
Please complete the following information to facilitate project closeout and indexing by the City
Clerk's Office.
Project Name:
Black River Pump Station Debris Barrier
= LUA (file) Number:
LUA-10-065, SME, CAR
Cross -References:
i AKA's:
Project Manager:
Jennifer Henning
Acceptance Date:
October 4, 2010
Applicant:
Sarah McCarthy - King County Water and Land Resources Division
Owner:
City of Renton
3 Contact:
Same as applicant
PID Number:
3779200090
ERC Decision Date:
ERC Appeal Date:
Administrative Approval:
October 4, 2010
Appeal Period Ends:
October 18, 2010
Public Hearing Date:
Date Appealed to HEX:
By Whom:
HEX Decision:
Date:
Date Appealed to Council:
By Whom:
s
Council Decision: Date:
Mylar Recording Number: I
Project Description: Request for Critical Areas Exemption and Shoreline Exemption to install a
floating debris retention structure upstream of the Black River Pump Station.
Location: 550 Monster Road SW I
Comments:
DEPARTMENT OF COMMUNITY City-of.��
AND ECONOMIC DEVELOPMENT [ �. C %[
PLANNING DIVISION
CERTIFICATE OF EXEMPTION
FROM CRITICAL AREAS REGULATIONS
EVALUATION FORM & DECISION
DATE OF PERMIT ISSUANCE: October 4, 2010
LAND USE ACTION FILE NO.: LUA10-065, CAR
PROJECT NAME: Black River Debris Barrier Critical Areas Exemption
PROJECT MANAGER: Jennifer Henning, Planning Manager
OWNER/APPLICANT: City of Renton, 1055 South Grady Way
Renton, WA 98057
CONTACT: Sarah McCarthy, Senior Ecologist
King County Water and Land Resources Division
201 South Jackson Street, Suite 600
Seattle, WA 98104
PROJECT LOCATION: 550 Monster Road (upstream of the Black River Pump
Station (APN: 3779200090)
CRITICAL AREA: Buffer of the Black River
PROPOSAL DESCRIPTION: Applicant proposes to install a floating debris retention
structure (TUFFBOOM Log and Debris Boom) upstream of the Black River Pump Station. The
boom will be anchored on the banks of the Black River, and consist of a foating boom aligned
across the river at approximately 72 degrees to the flow of the Black River. The boom is
proposed to be approximately 320 feet long and the area of disturbance is a total of 1,600
square feet. The width along each cable is 10 feet (5 feet on each side of the cable). The
preferred alignment and anchors point locations were chosen by the City of Renton and
KingCounty in order to minimize disturbance to shoreline vegetation and the existing walking
trail. On the South bank, a total of 4 Spruce trees would need to be relocated. These trees
were installed as part of a recent revegetation effort would be transplanted outside of the 10 -
foot wide swath. In addition, 10 small maple and alder trees would be removed. On the
North bank, 7 small alder and cottonwood trees are within the area of work, and up to 4 of
City of Renton Department of Comity & Economic Development Certificate of 40ption from Critical Areas Exemption
Black River Pump Station Critical Areas Exemption ZUA10-065, CAR
October 4, 2010 _ T Page 2 of 3
these would require removal. In addition, up to 7 alder trees would be removed. A critical
areas exception is also being required by the City of Renton in order to remove and transplant
vegetation.
It is expected that the construction would occur between early October and mid-November,
2010. The construction would take 3 to 5 days to complete.
The purpose of the debris barrier is to keep the Black River Pump Station from being
overwhelmed by large floatingdebris (e.g., wooden pallets, logs, etc.) in the event of a flood
exceeding the existing capacity of the Howard Hanson Dam. The upstream face of the Black
River Pump Station is equipped with a coarse screen to protect the pumps from debris and a
rail -mounted system for debris removal. The pump operator (King County Flood Control
District) is concerned that the capacity of the screens and removal system could be insufficient
for the debris -loading associated with a 25,000 cubic foot per second (cfs) flood in the Valley.
The proposed debris barrier would trap large debris before it reaches the pump station
screens. Flooding that could occur in association with the conditions at the Howard Hanson
Dam is considered to be an "emergency" for purposes of the project.
EXEMPTION JUSTIFICATION: Pursuant to RMC4-3-050C.5.h.i and ii, Emergency
Activities in Critical Areas and Associated Buffers, of the Critical Areas Regulations an
exemption is hereby granted:
i. Emergency Activities: Emergency activities are those which are undertaken to correct
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 imminent danger to public or
private property, or to prevent an imminent threat of serious environmental degradation.
ii. Emergency Tree/Ground Cover Cutting or Removal by Agency or Utility: Removal of trees
and/or ground cover by any City department or agency and/or public or private utility in
emergency situations involving immediate danger to life or property, substantial fire hazards, or
interruption of services provided by a utility.
FINDINGS: The proposed development is consistent with the following findings pursuant to
RMC section 4-3-050C.5:
1. The activity is not prohibited by this or any other chapter of the RMC or state or federal
law or regulation.
City of Renton Department of Comety & Economic Development Certificate of E*tion from Critical Areas Regulotions
1-40511-5 to 58169 Stage 2 Widening & SR 515 Interchange Project LUA, CAR
DATE OE PERMIT: October 4, 2010 Page 3 of 3
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. All removed trees shall be retained as large woody debris in the stream/buffer and
wetland/buffer corridors, where feasible.
DECISION: An exemption from the critical areas regulations is approved for the
removal/relocation of vegetation in order to accommodate the Black River Pump Station Debris
Barrier during the time period October to mid-November, 2010.
SIGNATURE:
C�
C.E. "Chip" Vincent, Planning 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 October 18, 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: One (1) year from the date of approval (signature date).
City of rt
DEPARTMENT OF COMMUNITY
AND ECONOMIC DEVELOPMENT -`
PLANNING DIVISION
CERTIFICATE OF EXEMPTION
FROM SHORELINE SUBSTANTIAL DEVELOPMENT
EVALUATION FORM & DECISION
DATE OF PERMIT ISSUANCE: October 4, 2010
LAND USE ACTION FILE NO.: LUA10-65, SME
PROJECT NAME: Black River Pump Station Debris Barrier
PROJECT MANAGER: Jennifer Henning, Current Planning Manager
OWNER/APPLICANT: City of Renton, 1055 South Grady Way
Renton, WA 98057
CONTACT (if other than Owner): Sarah McCarthy, Senior Ecologist
King County Water and Land Resources Division
201 South Jackson Street, Suite 600
Seattle, WA 98104
PROJECT LOCATION: 550 Monster Road (upstream of the Black River Pump
Station (APN: 3779200090)
LEGAL DESCRIPTION: See Attachment "A"
SEC-TWN-R: SEC 13-TWN23N-R4E
WATER BODY/WETLAND: Black River
PROPOSAL DESCRIPTION: Applicant proposes to install a floating debris retention
structure (TUFFBOOM Log and Debris Boom) upstream of the Black River Pump Station. The
boom will be anchored on the banks of the Black River, and consist of a foating boom aligned
across the river at approximately 72 degrees to the flow of the Black River. The boom is
proposed to be approximately 320 feet long and the area of disturbance is a total of 1,600
square feet. The width along each cable is 10 feet (5 feet on each side of the cable). The
preferred alignment and anchors point locations were chosen by the City of Renton and
KingCounty in order to minimize disturbance to shoreline vegetation and the existing walking
trail. On the South bank, a total of 4 Spruce trees would need to be relocated. These trees
were installed as part of a recent revegetation effort would be transplanted outside of the
10 -foot wide swath. In addition, 10 small maple and alder trees would be removed. On the
City of Renton Deportment of Comm u0Economic Development Certificate of lrxemorom Shoreline Substantiaf Development
Block River Pump Station Debris Barrrer LUA30-65, SME
DATE OP PERMIT: October 4, 2010 Page 2 of 3
North bank, 7 small alder and cottonwood trees are within the area of work, and up to 4 of
these would require removal. In addition, up to 7 alder trees would be removed. A critical
areas exception is also being required by the City of Renton in order to remove and
transplant vegetation.
It is expected that the construction would occur between early October and mid-November,
2010. The construction would take 3 to 5 days to complete.
The purpose of the debris barrier is to keep the Black River Pump Station from being
overwhelmed by large floatingdebris (e.g., wooden pallets, logs, etc.) in the event of a flood
exceeding the existing capacity of the Howard Hanson Dam. The upstream face of the Black
River Pump Station is equipped with a coarse screen to protect the pumps from debris and a
rail -mounted system for debris removal. The pump operator (King County Flood Control
District) is concerned that the capacity of the screens and removal system could be
insufficient for the debris -loading associated with a 25,000 cubic foot per second (cfs) flood
in the Valley. The proposed debris barrier would trap large debris before it reaches the
pump station screens. Flooding that could occur in association with the conditions at the
Howard Hanson Dam is considered to be an "emergency" for purposes of the project.
An exemption from a Shoreline Management Substantial Development Permit is hereby granted
on the proposed project in accordance with RMC 4-9-190.C. 5. and/or for the following
reason(s):
5. Emergency construction necessary to protect property from damage
by the elements.
a. An "emergency" is an unanticipated and imminent threat to public
health, safety, or the environment which requires immediate action within a
time too short to allow for full compliance with this program.
b. Emergency construction does not include development of new
permanent protective structures where none previously existed. Where new
protective structures are deemed to be the appropriate means to address
the emergency situation, upon abatement of the emergency situation, the
new structure shall be removed or any permit which would have been
required, absent an emergency, pursuant to chapter 90.58 RCW, chapter
17-27 WAC or this Shoreline Program shall be obtained.
c. All emergency construction shall be consistent with the policies of
chapter 90.58 RCW and this Program.
d. In general, flooding or other seasonal events that can be
anticipated and may occur, but that are not imminent are not an emergency.
City of Renton Department of Comm u0 Economic Development Certificate of Exemorom Shoreline Substontiol Development
Black River Pump Station Debris Berner LUA10-6S, SME
DATE OF PERMIT: October 4, 2010 Page 3 of 3
The proposed development is consistent or inconsistent with (check one):
CONSISTENT
INCONSISTENT
Policies of the Shoreline Management Act.
N/A The guidelines of the Department of Ecology
where no Master Program has been finally
approved or adapted by the Department.
x
. ec?
C. E. "Chip" Vincent, Planning Director
Planning Division
Attachments: vicinity/Neighborhood Detail Map
Site Plan
cc: Owner/Applicant
Contact
City of Renton official File
The City of Renton Shoreline Master Program.
j 0 1(.1
Date
E
ATTACHMENT "A"
JUNCTION ADD POR TRS 21-22-23-24 & 25A & POR TRS 26 & 29 RENTON SHORELANDS 2ND
SUPL ADD BEG SW COR SEC 13-23-04 TH E 1271.74 FT TH N TAP ON BDRY LN BET TRS 28 & 29
OF SD RENTON SHORELANDS 2ND SUPL ADD & TPOB TH CONTG N 275 FT TH W 280.69 FT TH S
59-53-47 W 377.52 FT TH S 74-13-19 W TO ELY MGN OF CO RD TH SELY ALG SD ELY MGN TO SLY
BDRY OF SD TR 29 TH ELY ALG SD SLY BDRY TO TPOB ALSO BEG TPOB ABOVE DESC TH N 250
FT TH ON TANGENT CURVE TO RGT RAD OF 627.46 FT TAP ON BDRY LN BEG TRS 26 & 27 OF SD
RENTON SH LDS 2ND SUPL ADD TH SWLY ALG SD BDRY LN TO BEG LESS PORTION FOR CO
ROAD
0
z
0
Q
C W
IL
<
EL
0:
w m
�
�
Q
�
�
&K
\
,
i
� `
�
§(
& |
!§
2
!
|
Vol
�
Cl
§\LLJ
|
(TU
��.
$
\
,
i
R
i
.. 3
�
a S
� w
N
�
wS
� i
2
cJi� 02
i 40
rc�
� wo
os R<
u
O&r
i
ak
O
�
Z
jI
I
M1�
k
� 1
oV
w
V.,
g
MOON—
p
•.vis--xrx»m �ss�oosoeooxu�oan �•.a
i 9
City of Renton
LAND USE PERMIT
MASTER APPLICATION
PROPERTY OWNER(S)
NAME: City of Renton
ADDRESS: 1055 South Grady Way
CITY: Renton ZIP; 98057
TELEPHONE NUMBER: (425) 430-6600
APPLICANT (if other than owner)
NAME: Sarah McCarthy, Senior Ecologist
COMPANY (if applicable): King County Water and Land
Resources Division
ADDRESS: 201 South Jackson Street, Suite 600
CITY: Seattle ZIP: 98104
TELEPHONE NUMBER: (206) 263-0492
CONTACT PERSON
NAME: Same as applicant
Alternative: Erik Peters, (206) 684-1787
COMPANY (if applicable):
ADDRESS;
CITY: ZIP:
TELEPHONE NUMBER AND EMAIL ADDRESS:
sarah.mccarthy@kingcounty.gov: erik.peters@kingcounty.gov
PROJECT INFORMATION
PROJECT OR DEVELOPMENT NAME:
Black River Pump Station Debris Barrier
PROJECTIADDRESS(SYLOCATION AND ZIP CODE:
550 Monster Road
Renton, WA 98057
KING COUNTY ASSESSOR'S ACCOUNT NUMBER(S):
377920-0090
EXISTING LAND USE(S):Ublity, Public
PROPOSED LAND USE(S). Same, with floating debris barrier
upstream of Black River Pump Station
EXISTING COMPREHENSIVE PLAN MAP DESIGNATION:
PROPOSED COMPREHENSIVE PLAN MAP DESIGNATION
(if applicable) NIA
EXISTING ZONING:
RC(P)
PROPOSED ZONING (if applicable);
NIA
SITE AREA (in square feet):
281,340 (parcel size); Bearing area 1600 square feet
SQUARE FOOTAGE OF PUBLIC ROADWAYS TO BE
DEDICATED:
NIA
SQUARE FOOTAGE OF PRIVATE ACCESS EASEMENTS:
NIA
PROPOSED RESIDENTIAL DENSITY IN UNITS PER NET
ACRE (if applicable)
NIA
NUMBER OF PR65b FD � OTS (If applicable)
�/A
NUMBER QF,-WI=W DW LLi4G UNITS (if applicable):
I:IFIoo3 Drive FileslGreen1FL8046 Black River Pump SlalDebris5creenlWordlPermifsU2cnton ShGpeJi� es Apjilic ri.L,lRent. MasterApp BRPS Debris
Barrier.doc - 1 - �'' %� eCr111�E� 06109
f�
PROJECT INFORMA
NUMBER OF EXISTING DWELLING UNITS (if applicable):
NIA
SQUARE FOOTAGE OF PROPOSED RESIDENTIAL
BUILDINGS (if applicable): NIA
SQUARE FOOTAGE OF EXISTING RESIDENTIAL
BUILDINGS TO REMAIN (if applicable): NIA
SQUARE FOOTAGE OF PROPOSED NON-RESIDENTIAL
BUILDINGS (if applicable): NIA
SQUARE FOOTAGE OF EXISTING NON-RESIDENTIAL
BUILDINGS TO REMAIN (if applicable): 5950
NET FLOOR AREA ON NON-RESIDENTIAL BUILDINGS (if
applicable): 5950
NUMBER OF EMPLOYEES TO BE EMPLOYED BY THE NEW
PROJECT (if applicable):
0
TION continued
PROJECT VALUE: $50,000
IS THE SITE LOCATED IN ANY TYPE OF
ENVIRONMENTALLY CRITICAL AREA, PLEASE INCLUDE
SQUARE FOOTAGE (if applicable):
❑ AQUIFIER PROTECTION AREA ONE
0 AQUIFIER PROTECTION AREA TWO
❑ FLOOD HAZARD AREA sq. ft.
❑ GEOLOGIC HAZARD sq. ft.
❑ HABITAT CONSERVATION sq. ft.
❑ SHORELINE STREAMS & LAKES _1800_ sq. ft.
❑ WETLANDS sq. ft.
LEGAL DESCRIPTION OF PROPERTY
Attach le al description on separate sheet with the following information included
SITUATE IN THE _SW QUARTER OF SECTION _13_, TOWNSHIP _23N_, RANGE _4E_, IN THE
CITY OF RENTON, KING COUNTY, WASHINGTON
TYPE OF APPLICATION & FEES
List all land use applications being applied for:
1. Shoreline Exemption 3•
2. 4.
Staff will calculate applicable fees and postage: $
AFFIDAVIT OF OWNERSHIP
1, (Print Namels) , declare under penalty of perjury under the laws of the State of
Washington that 1 am (please check ane) _the current Aner of the property involved in this application or __!:,:�e authorized representative to act
for a corporation (please attach proof of authorization) and ftat the foregoing statements and answers herein contained and the information herewith are
in all respects true and correct to the best of my knowledge and belief.
I certify that I know or have satisfactory evidence that V_
signed this instrument and acknowledge it to be hWherRheir free and voluntary
act for the uses and purposes mentioned in the instrument.
( tgnature of OwnerlRe ative)
No ryPublic in an for the State of Washington
(Signature of Owner/Representattver r r
=Notary (Print) 3 rdlal i'Pt, 3
6r
My appointment expires: S " Z7' 2D -2
I:1Flood Drive FitcslGr'cenlFLS046 Black Riv ',WordlPcrmimRenton Shorelines Application MaterialslRentan MastcrApp BRPS Debris
Barr'rcr.doc 111111 - Z - 06149
LEGAL DESCRIPTION OF PROPERTY
Attach le al description on separate sheet with the following information included
SITUATE IN THE _SW QUARTER OF SECTION _13_, TOWNSHIP _23N_, RANGE _4E_, IN THE
CITY OF RENTON, KING COUNTY, WASHINGTON
TYPE OF APPLICATION & FEES
List all land use applications being applied for:
1. Shoreline Exemption 3•
2. 4.
Staff will calculate applicable fees and postage: $
AFFIDAVIT OF OWNERSHIP
1, (Print Namels) , declare under penalty of perjury under the laws of the State of
Washington that 1 am (please check ane) _the current Aner of the property involved in this application or __!:,:�e authorized representative to act
for a corporation (please attach proof of authorization) and ftat the foregoing statements and answers herein contained and the information herewith are
in all respects true and correct to the best of my knowledge and belief.
I certify that I know or have satisfactory evidence that V_
signed this instrument and acknowledge it to be hWherRheir free and voluntary
act for the uses and purposes mentioned in the instrument.
( tgnature of OwnerlRe ative)
No ryPublic in an for the State of Washington
(Signature of Owner/Representattver r r
=Notary (Print) 3 rdlal i'Pt, 3
6r
My appointment expires: S " Z7' 2D -2
I:1Flood Drive FitcslGr'cenlFLS046 Black Riv ',WordlPcrmimRenton Shorelines Application MaterialslRentan MastcrApp BRPS Debris
Barr'rcr.doc 111111 - Z - 06149
0
City of Renton Shoreline Exemption Request
Habitat and Stream Assessment
Name: Black River Pump Station Debris Barrier
Size: 320 linear feet (floating boom); 1.600 ftZ clearing area on bank
Location: Black River Pump Station
550 Monster Road
Renton, WA 98057
Parcel #: 377920-0090
The pump station has minimal vegetation on the property, with the exception of a few trees (but
mostly grass and Himalayan blackberry) around the fenceline. The project area is minimally
vegetated with a mixture of grass and invasive plant species (primarily Himalayan blackberry),
and the project alignment was selected jointly by the City of Renton and King County to
minimize vegetation disturbance. The area upstream of the pump station and the project area is
densely vegetated with coniferous and deciduous vegetation, and serves as a Great blue heron
rookery.
The habitat impacts of this project will be minimal, as we will only clear grass and small shrubs
along the alignment of the debris barrier attachments and anchors (10 -foot wide swath on each
bank). The site will be seeded and mulched immediately following construction.
Once installed, the floating boom will not be a passage barrier for adult or juvenile fish. The
floating boom and anchor points will not affect other wildlife (such as herons) once installed,
though birds may perch on the boom itself and feed.
Salmon habitat upstream of the pump station is limited by water quality; however, salmonids do
migrate up the Black River and through a fish ladder in the pump station and juveniles rear in
Springbrook Creek. Bull trout use in this system is unknown; however, Springbrook Creek
provides rearing and spawning habitat for threatened Chinook salmon and steelhead_ Fish
species are not likely to be affected by this project due to the distance from the ordinary high
water mark, as well as the short duration of work. However, various bird species (e.g., bald
eagle, great blue heron) may be impacted due to noise and construction disturbance adjacent to
nesting and perching habitat. There are no wetlands within the project area.
0 9
City of Renton Shoreline Exemption
Project Narrative
Name: Black River Pump Station Debris Barrier
Size: 320 linear feet (floating boom); 1600 ft2 clearing area on bank
Location: Black River Pump Station
550 Monster Road
Renton, WA 98057
Parcel #: 377920-0090
Background:
The Black River Pump Station was initially constructed in 1971, and consists of a dam across the
historic Black River channel and eight pumps that sit atop the dam. The dam prevents flooding of the
levee -protected area in the northeast portion of the lower Green River valley that would otherwise
backflow via the Black River Channel. The pumps convey Springbrook Creek and flows from local
drainages system from the landward side of the levee system to the Green River via the Black River_
Damage to the right abutment of Howard Hanson Dam has raised the threat of flooding in the
Green/Duwamish River Valley. The U.S. Army Corps of Engineers has notified downstream
communities of a situation at the Howard Hanson Dam that may require the release of more water
than usual during extreme rain events. As a result of this increased water release, parts of the Green
River valley are at a higher risk of flooding. The USACE has produced flood maps showing the
depths and extents of a flood through the Green/Duwamish River valleys resulting from a high flow
release of 25,000 cfs_ Normal maximum flow releases from the Howard Hanson Dam are 12,000 cfs.
If such a flood occurs, the Black River Pump Station is designed to relieve flooding in portions of
the City of Renton by pumping water from the Black River basin to the Green/Duwamish River.
The Black River Pump Station also blocks flows from the Duwamisb River to prevent flooding back
into the Black River, Springbrook Creek, and the Earlington Industrial Park in Renton. The Black
River Pump Station has a pumping capacity of 3,000 cfs and is located approximately 1,000 feet
upstream of the confluence with the Green/Duwamish River, in Renton. The upstream face of the
pump station is equipped with a coarse screen to protect the pumps from debris and a rail -mounted
system for debris removal. King County Flood Control District, the pump station operator, is
concerned that the capacity of the screens and removal system could be insufficient for the debris
loading associated with a 25,000 cfs flood in the Renton valley.
Brief Description of Proposed Work:
King County proposes to install a floating debris retention structure (TUFFBOOM Log and Debris
Boom; www.tuffhoom.com) upstream of the Black River Pump Station. This will consist of metal
anchors on the banks and a floating boom aligned across the river at approximately 72 degrees to the
flow of the Black River (see 75% plans, attached). The floating boom is approximately 320 feet
long. The preferred alignment and anchor point locations were chosen by the City of Renton and
King County in order to minimize disturbance to shoreline vegetation and a walking trail.
Basis for Exemption Request:
King County requests a Shoreline Exemption from the City of Renton because the project is
"emergency construction necessary to protect property from damage by the elements." (see
Background)
9
Anticipated Dates of Work: October 4,2010— November 12, 2010 (3-5 days of work)
Other Permits Required:
SEPA — This project is covered by King County's programmatic SEPA: King County Flood
Protection Facility Maintenance and Flood Damage Repair Program (2007-2012).
Though the project is covered, it should be considered exempt from SEPA compliance under WAC
197-11-880, in that it is considered an "action that must be undertaken immediately or within a time
too short to allow full compliance with this chapter, to avoid an imminent threat to public health or
safety [and] to prevent an imminent danger to public or private property..." King County is the lead
agency for this project.
Hydraulic Project Approval — King County will be applying for a HPA from the Washington
Department of Fish & Wildlife (Larry Fisher, Area Habitat Biologist)_
Current and proposed use of site:
The site is currently used for utility and public use. The proposed project will not change these land
uses, rather it will help protect and maintain the current use in the case of a large flood event.
The City of Renton owns the parcel upon which the proposed work will take place. The City has
requested that this work be completed in advance of the 2010-2011 flood season.
Special site features:
The site is adjacent to the Black River channel (see Habitat and Stream Assessment below). There
are no wetlands in the proposed work area-
Soils/Drainage:
The alluvium in the project area is predominantly fine silts and clays of the Woodinville silt loam
unit. This nearly level to gently undulating, poorly drained unit was formed in alluvium on
flood plains, and it is comprised of up to 7 in (18 cm) of gray to light brownish gray silty loam
(A horizon) overlying up to 15 in (38 cm) of gray silty clay loam (B horizon). Below these fine
units, the United States Department of Agriculture (USDA) Natural Resources Conservation
Service (NRCS) has mapped up to 5 ft (1.5 m) of stratified muck to silt loam, greenish -gray in
color (continued B horizon).
Total estimated construction cost and estimated fair market value of proposed project: $50,000
Quantity and nature of materials (temporary fill): N/A
Number, type, and size of any trees to be removed.
No trees will be removed as part of this project.
Closest distance to OHWM. 70 feet (north bank anchor distance), 90 feet (south bank anchor
distance)
Existing shoreline: riprap, Black River bank deposits, and vegetation
Project height: N/A
" x
a
N m �
W V c!
O
w x
m 1 l 1
-0 a f/ a�•� z z o
m? a IL �yW+ W sTt o w z W o
W(u Q Wo
N O d O w fn
z —J o
t �W o SC If
C @ J u
C N GJ t
}} H
E
n W w`
Q � O( aU i� .djlU m L o6 B
H 3i 2 O 3 Q
2 7
Q WLn
J wm M�
g
m
Lug
o�
Tux
U �#
O�O
W
2�
F_ S rc
z g K
/�o
I7
c
rr.g
z
22
LO
�:�
e
R
N
o
a
�
G �
'
1Nw
o
} z
z
Q
g �o
oN
rc3 WS
o rc�
�I
R�
pCm �
Y
le R
a
f
'
1
I
�I
I
lan
Wz
R�
pCm �
Y
le R
a
f
�
� 2§ }%�w�[
� `
.
77§
$
,}i
§
k # 2 �
°
+ \
� /
\
§
■!
�
-
� k/
�� ���
��
|}
§
� §
�
k§
2 §
�
f; $§�
k�
�
� �
��
§
\
.
� � �
� �
� \
`/; |
�`�!
§ �
. �i°
2� "
� a !
2�) f
, f. \
�
. §� [
| i ! ;
k �
)@\�� |
i ��
�
§\� � {
/�
- � �
�
�\
) � �
� # ��
i ' �
§
k/
��
_
�
. � .
¥
��/
\
\ �:\
� %
: � �
� � �!
«
��\
) §
)
�
� �!\
��
B
� �
/
� }
� §
� � �
�`
§ |
® w
�K
2�
� }
�
E
� �
h
§|�
|
�
. . �
|. ��
�� \
\|� �� !_
���
|
/ �§T
� � m;
�
� '§ \
�
q'\
�a
¥
�,
\ , � �
!|
�|
.
[`�;|�
§||§|§