HomeMy WebLinkAboutLUA-08-074_Report 1CITY OF RENTON
DEPARTMENT OF COMMUNITY & ECONOMIC
DEVELOPMENT
MEMORANDUM
Date: March 20, 2009
To: City Clerk's Office
From: Stacy 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 Sediment Removal
LUA (file) Number: LUA-08-074, SME
Cross-References:
AKA's:
Project Manager: Vanessa Dolbee
Acceptance Date: July 22, 2008
Applicant: John Koon, King County
Owner: City of Renton
Contact: Same as applicant
PID Number: 3779200090
ERC Decision Date:
ERC Appeal Date:
Administrative Approval: July 22, 2008
.
Appeal Period Ends: August 5, 2008
Public Hearing Date: I
Date Appealed to HEX:
By Whom:
HEX Decision: Date:
Date Appealed to COuncil:
By Whom:
COuncil Decision: Date:
Mylar Recording Number:
Project Description: The applicant Is proposing to remove sediment from a 1,540 sq ft area Inside the
Black River Pump Station, as normal maintenance of an existing structure. The River Pump Station Is located
on the Black River. at rive mile 0.33. The project would result in the removal of approximately 150 cubic yards
of sediment from within the concrete structure of the Black River Pump Station to allow two pumps that have
been out of service to be repaired, tested and returned to active status. This work will meet immediate needs
related to flood risk reduction and flood plain mapping In the Green River floodplain. If the current propsed
maintenance work Is not completed, the ability of the pump station to return flood flows from a right bank
breach of the Green River levees would be reduced by approximately 35%.
Location: Black River -river mile 0.33 (Black River Pump Station)
COmments:
CITY OF RENTON
CERTIFICATE OF EXEMPTION FROM
SHORELINE SUBSTANTIAL DEVELOPMENT PERMIT
DATE: July 22,2008
LAND USE ACTION FILE NO.: LUA08-074, SME
PROJECT NAME: Black River Pump Station Sediment Removal
OWNER:
APPLICANT:
PROJECT MANAGER:
PROPOSAL:
City of Renton, Parks Department
1055 S Grady Way
Renton, WA 98057
John Koon
King County
201 S Jackson st. Ste 600
Seattle, WA 98104
Vanessa Dolbee
Associate Planner
NAME INITIALJOATE
The applicant is proposing to remove sediment from a
1,540 square foot area inside the Black River Pump
Station, as normal maintenance of an existing
structure. The Black River Pump Station is located on
the Black River at River Mile 0.33. The project would
result in the removal of approximately 150 cubic yards
of sediment from within the concrete structure of the
Black River Pump Station to allow two pumps that
have been out of service to be repaired, tested and
returned to active status. This work will meet
immediate needs related to flood risk reduction and
flood plain mapping in the Green River floodplain. If
the current proposed maintenance work is not
completed, the ability of the pump station to return
flood flows from a right bank breach of the Green
River levees would be reduced by approximately 35
percent.
The shoreline in the work area is a concrete dam.
Immediately upstream of the work area the shoreline
is a concrete bulkhead. Further upstream, the
constructed forebay has become largely naturalized
and had adapted to the current water level which,
based on the pump station operations, is kept
between the elevation of 3 and 6 feet.
Exemption from Shoreline Substantial Development Permit
CITY OF RENTON
CERTIFICATE OF EXEMPTION FROM
SHORELINE SUBSTANTIAL DEVELOPMENT PERMIT
DATE: July 22,2008
LAND USE ACTION FILE NO.: LUA08-074, SME
PROJECT NAME: Black River Pump Station Sediment Removal
OWNER: City of Renton, Parks Department
1055 S Grady Way
Renton, WA 98057
APPLICANT: John Koon
King County
201 S Jackson St. Ste 600
Seattle, WA 98104
PROJECT MANAGER: Vanessa Dolbee
Associate Planner
PROPOSAL: The applicant is proposing to remove sediment from a
1,540 square foot area inside the Black River Pump
Station, as normal maintenance of an existing
structure. The Black River Pump Station is located on
the Black River at River Mile 0.33. The project would
result in the removal of approximately 150 cubic yards
of sediment from within the concrete structure of the
Black River Pump Station to allow two pumps that
have been out of service to be repaired, tested and
returned to active status. This work will meet
immediate needs related to flood risk reduction and
flood plain mapping in the Green River floodplain. If
the current proposed maintenance work is not
completed, the ability of the pump station to return
flood flows from a right bank breach of the Green
River levees would be reduced by approximately 35
percent.
The shoreline in the work area is a concrete dam.
Immediately upstream of the work area the shoreline
is a concrete bulkhead. Further upstream, the
constructed forebay has become largely naturalized
and had adapted to the current water level which,
based on the pump station operations, is kept
between the elevation of 3 and 6 feet.
Exemption from Shoreline Substantial Development Permit
PROJECT LOCATION:
LEGAL DESCRIPTION:
SEC-TWN-R:
WATER BODYIWETLAND:
Specific actions for the maintenance project include
but are not limited to: Creation of temporary sediment
dewatering area, installation of a geotextile turbidity
curtain immediately outside of the pump bays, the use
of a hydraulic dredge suspended from existing
overhead cranes, water quality monitoring and
mitigation actions if necessary. No additional
encroachment on the shoreline area is proposed.
This work would occur during August 15th to the 31 st of
2008 or the same time frame in 2009.
King County has made a Determination of Non-
Significance for the subject Shoreline Exemption.
Black River at River Mile 0.33
550 Monster Road
Renton, WA 98057
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 BETTRS 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 SEL Y 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
SWL Y ALG SD BDRY LN TO BEG LESS PORTION
FOR CO ROAD
S. 13 T. 23N R. 4E
Black River (Natural Environment)
Exemption from Shoreline Substantial Development Permit
An exemption from a Shoreline Substantial Development Permit is hereby granted on
the proposed project in accordance with RMC 4-3-090L 6 and RMC 4-9-190C 3:
xx Normal maintenance or repair of existing structures or developments, including
damage by accident, fire or elements.
a. "Normal maintenance" includes those usual acts to prevent a decline,
lapse, or cessation from a lawfully established condition.
b. "Normal repair" means to restore a development to a state comparable
to its original condition, including but not limited to its size, shape,
configuration, location and external appearance, within a reasonable
period after decay or partial destruction, except where repair causes
substantial adverse effects to the shoreline resource or environment.
The proposed development is consistent or inconsistent with (check one):
CONSISTENT INCONSISTENT
xx
N/A
CONDITIONS OF APPROVAL:
Policies of the Washington State
Shoreline Management Act.
The guidelines of the Department of
Ecology where no Master Program has
been finally approved or adapted by the
Department.
The City of Renton Shoreline Master
Program.
1. To accommodate early summer Great Blue Heron nesting and late summer/fall
fisheries constraints sediment removal shall be conducted between August 15 to
August 31 of 2008 or 2009.
2. If during the course of the dredging and settling period, monitoring reveals that
state standards are at risk of being exceeded, the applicants shall take action to
mitigated for water quality as listed in attachment A.
3. When dredging the banks shall not be disturbed unless absolutely necessary. If
it is absolutely necessary to disturb the adjacent banks for access to the dredging
area, the responsibility rests with the applicant to propose and carry out a
method of restoration of the disturbed area to a condition minlmizing erosion and
siltation. J.t
Exemption from Shoreline Substantial Development Permit
C-~< v-sa
C. E. Vincent, Planning Director,
Department of Community & Economic
Development
Attachments:
A. Black River Pump Station Sediment Removal Project Narrative
B. Determination of Non-Significance, Dated July 19, 2008
c. Cover Sheet
D. Plan View
E. Cross Section A-A
F. Neighborhood Map
cc: File
Exemption from Shoreline Substantial Development Permit
Black River Pump Station Sediment Removal JUL -32008
Phase 1: Pilot Project
Project Narrative for City of Renton Shoreline Substantial Development Request
a) Project name, size and location of site
Black River Pump Station Sediment Removal Pilot Project
The Black River Pump Station, also referred to as the P-1 pump station, is located
on the Black River at River Mile 0.33 in the city of Renton. The address of the
facility is 550 Monster Road. The facility is in the SE 1/4 Section 13, T23N R4E.
The dredging area is located at latitude N 47.4752, longitude W 122.24496.
Proposed work includes removal of sediment from a 1540 square foot area inside the Black
River Pump Station. Equipment will be operated from a 4000 square foot asphalt utility area
and a 1200 square foot area in the Black River Natural Area that is currently vegetated with
mowed grass (-1000 square feet) and with Himalayan Blackberry (-300 square feet).
Access will be along an existing 800 foot long primitive road that runs along the right (north)
bank of the Black River between Monster Road and the Black River Pump Station.
b) Brief description of proposed work
This project will result in the removal of approximately 150 cubic yards of sediment from
within the concrete structure of the Black River Pump Station to allow two pumps that have
been out of service to be repaired, tested and retumed to active status.
The Black River Pump Station 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 othelWise be flooded by
backflow through 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 Channel.
The Black River Pump Station was initially constructed in 1971. In 1986 the channel upstream
of the pump station, or forebay, was greatly enlarged, thereby increasing the storage area for
flood flows. Since the construction of the larger forebay, sediment has accumulated upstream
of the dam, including the area around the pump intakes. While this has kept the material out of
the Green/Duwamish River, the sediment has now reached a level that threatens the operation
of the pumps. To allow continued operation of the pumps, sediment immediately adjacent to
the pump intakes needs to be removed and a monitoring and maintenance program needs to
be established to meet ongoing sediment management needs.
The current pilot proposal is to remove approximately 150 cubic yards of sediment from in front
of two of the pump intakes to meet immediate pump station maintenance needs. This work will
meet immediate needs related to flood risk reduction and floodplain mapping in the Green
River floodplain. If the current proposed maintenance work is not completed, the ability of the
pump station to return flood flows from a right bank breach of Green River levees will be
reduced by approximately 35%. In addition to the increased risk to people and property
posed by not having these pumps in service, this reduction in the ability to evacuate flood
waters may result in an increase in the mapped base flood elevations for parts of the cities of
ATTACHMENT A
Black River Sediment Removal
Page 1 of4
Renton and Kent. Increased based flood elevations will increase flood insurance needs city
for businesses and will adversely impact economic development in the cities of Renton and
Kent.
Specific actions proposed as part of this maintenance project include:
1. Create a tempcrary sediment dewatering area in the grassy area immediately north of the
dam. The dewatering area will be comprised of a number of lined 47 cubic yard shipping
containers fitted with and geotextile fabric Geotubes or comparable dewatering structures.
It is anticipated that between three to five containers will be on site at any given time. The
actual number will depend on a number of variables such as rate of sediment removal and
dewatering, and the rate at which the waste disposal contractor is able to supply and export
the containers.
2. Install the existing concrete stop blocks in each of the pump bays to be cleaned (Zone 1
on plan set profile) to isolate the pump bays from the surrounding waters. In addition,
install a geotextile turbidity curtain immediately outside the pump bays in the forebay area
to contain any sediment that may be suspended while the area between the pump bays
and the trash rack (Zone 2) is being cleaned.
3. Establish water quality monitoring stations for turbidity monitoring at the following
locations:
3.1. within the work area when work is completed to ensure turbidity within the silt curtain
is no more than 5 NTUs greater than background prior to removal of the turbidity
curtain.
3.2. outside and at least 100 feet upstream of the work area
3.3. downstream of the dam near the low flow pump outfall
4. USing a hydraulic dredge suspended from the existing overhead cranes on the pump
station the building, pump sediment from the proposed work area to the temporary
dewatering facility described above. Other suction devises such as a vactor truck or
portable water pumps may also be used to complete the sediment removal work.
5. Throughout the dredging process, water segregated by the Geotubes in the shipping
containers will be pumped into a tanker truclk and transported off-site to a wastewater
treatment facility. If permitted, a limited amount of water will be recycled as process
water for use when cleaning the parts of the pump bays that are isolated from the
forebay. When all work is completed, this recycled water will also be exported to a
wastewater treatment facility.
6. If, during the course of the dredging and settling period, water quality monitoring reveals
that state standards are at risk of being exceeded, mitigation actions will be taken. These
actions will be selected from the following options:
6.1. Stop wOrk.
6.2. Adjust the turbidity curtain to eliminate leaks.
6.3. Add a second turbidity curtain outside the first curtain to improve containment.
6.4. Bypass flows coming into the forebay by pumping from a point at least 100 feet
upstream of the turbidity plume to allow baseflows to continue to the Black River
channel without passing thoug h the fore bay .
7. Once sediment has been sufficiently dewatered, transfer the sediment off-site to an
appropriate solid waste disposal facility.
8. Remove all equipment from the dewatering area and reseed any areas that may have been
disturbed during the placement and removal of shipping containers.
Black River Sediment Removal
Page 2 of4
9. Map sediment levels in the excavation area immediately after the excavation is complete
and the following spring to determine changes in sediment distribution.
10.Use infonmation gained during the pilot project to estimate future sediment management
needs and to develop long-term management alternatives.
c) Basis for the exemption request (reference exemption category from first page)
Normal maintenance or repair of existing structure.
d) Anticipated dates of work
To accommodate early summer Great Blue Heron nesting and late summer/fall fisheries
constraints sediment removal is planned for August 15 to 31, 2008. If permits cannot be
secured by this date, then work will be done during this same period in 2009.
e) Other permits required for proposed project
Hydraulic Project Approval
Industrial Discharge Permit for the discharge of water to the wastewater treatment facility
King County has made a determination of non significance for this maintenance work and is
in the process of completing the SEPA process.
f) Current and proposed use of the site
The site is currently used as a flood control facility which includes a dam across the Black
River Channel, a pump house that sits atop the dam, a small office, three above-ground diesel
storage tanks, an asphalt storage area and a gravel parking lot. Land uses adjacent to the
pump station include open space and a road. The surrounding area includes a railroad line, a
concrete recycling facility and residential and commercial properties.
The proposed maintenance work will not change the land use in the area.
g) Special site features (i.e. wetlands, water bodies, steep slopes)
The forebay of the Black River Pump Station backs up into the Black River Riparian Forest.
The forebay and the forest provide valuable habitat to a variety of birds and other wildlife,
including a Great Blue Heron Colony and a pair of Bald Eagles.
The Black River enters the Green River approximately 1/3 of a mile downstream of the Black
River Pump Station.
h) Statement addressing soil type and drainage conditions
The material being removed is primarily fine silt. This material will be saturated when
removed. The area from which the sediment is being removed is concrete.
i) Total estimated construction cost and estimated fair market value of the proposed
project
$100,000-$150,000
j) Estimated quantities and type of materials involved if any fill or excavation is
proposed
Black River Sediment Removal
Page 30f4
Approximately 150 cubic yard of fine sediment will be exported from the site.
k) Number, type and size of any trees to be removed
No trees will be removed as a result of this maintenance activity.
I) Distance from closest area of work to the Ordinary High Water Mark of the shoreline
The work will occur below the ordinary high water mark within the Black River Pump station.
m) Nature of the existing shoreline (e.g •. high bank, naturalize, rip rap, bulkhead, etc.)
The shoreline in the work area is a concrete dam. Immediately upstream of the work area
the shoreline is a concrete bulkhead. Further upstream, the constructed forebay has
become largely naturalized and has adapted to the water current water level which, based
on the pump station operations, is kept between the elevations of 3 and 6 feet.
n) If the proposed project exceeds a height of 35-feet above the average grade level,
discuss the approximate location of and number of residential units, existing and
potential, that will have an obstructed view
The proposed maintenance work will not affect views.
Black River Sediment Removal
Page 4 of 4
tAl
King County
Water and Land Resources Division
Department of Natural Resources and Parks
King Street Center
201 South Jackson Street, Suite 600
Seattle, WA 98104-3855
206-296-6519 Fax 206-296-0192
TTY Relay: 711
Determination of Non-Significance
.,UN 2 5 2008
RECE.tVED
Name of Proposal: Black River Pump Station Sediment Removal Pilot Project
Description of Proposal:
King County Water and Land Resources Division proposes to remove sediment from the forebay
ofthe Black River Pump Station. The current pilot proposal is to remove approximately 150
cubic yards of sediment from in front of the pump intakes to meet inunediate pump station
maintenance needs. The program will include routine monitoring of sediment migration and
accumulation within the forebay to assess the need for future sediment management actions.
The Black River Pump Station consists of a dam across the historic Black River channel and
eight pumps that sit atop the dam. The dan1 prevents flooding of the levee-protected area in the
northeast portion of the lower Green River valley that would otherwise be flooded by backflow
through 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 Channel.
Location of Proposal:
The Black River Pump Station, also referred to as the P-l pump station, is located on the Black
River at River Mile 0.33 in the city of Renton. The address ofthe facility is 550 Monster Road.
The facility is in the SE 114 Section 13, T23N R4E. The dredging area is located at latitude N
47.4752, longitude W 122.24496.
Responsible Official: Mark Isaacson
PositionITitle: Division Director, Water and Land Resources Division
Address: 201 South Jackson Street, Suite 600
Seattle, WA 98104-3855
DATE: SIGNAT
ATTACHMENT B 6/18108
Detennination ofNon-Si~ cance
Black River Pump Station Sediment Removal Pilot Project
Page 2
Proponent and Lead Agency: King County Department of Natural Resources and Parks
Water and Land Resources Division
Contact Person(s): John Koon, Project Manager, 206-296-8062
The lead agency for this proposal has detennined that it does not have a probable significant
adverse impact on the environment. An Environmental Impact Statement (EIS) is not required
under Revised Code of Washington (RCW) 43.2IC.030(2)(c}. This decision was made after
review of a completed environmental checklist and other infonnation on file with the lead
agency. THIS INFORMATION IS AVAILABLE TO THE PUBLIC ON REQUEST (for a
nominal photocopying fee).
THIS DETERMINATION OF NON-SIGNIFICANCE (DNS) is issued under Washington
Administrative Code (WAC) 197-11-340(2); the lead agency will not act on this proposal until
after July 10, 2008. Comments must be submitted by that date.
For additional information, please contact:
0/08-
John Koon, Project Manager
206-296-8062
King County Water and Land Resources Division
201 South Jackson Street, Suite 600
Seattle,WA 98104-3855 .
6118/08
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1
2
3
4
INDEX
DESCRIPTION
COVER SHEET
PLAN VIEW
CROSS SECTION A-A
NEIGHBORHOOD MAP
PRO.ECT
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MANAGER' JOHN KOON . I a ~.
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--"""""" BY I ~TE
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SURVEY No.
O£SIGH £NlERED: UCA DUlAN 6-2008 I MAJNTENAJNCE DIVISION No.
FlO 1 04
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King County
Department of Natural Resources and Parks
Water and Land Resources Division
Flood Hazard ReductIon ServIces SectIon
Pam Bissonnette, Director
Department of Natural Resources and Parks
BLACK RIVER PUMP STATION
SEDIMENT REMOVAL
PHASE 1
c!J
DEVELOPMENT pu>NNING
CITY CF ?Ft·.JTt}i"J
U1 King County
DapartmenI cfNat\.l'ef ReeourceI and Parka
Water and land Resources Division
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1-800-424-5555
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BLACK RIVER PUMP ST A TlON
SEDIMENT REMOVAL
SHEET
1
OF
PHASE 1 4
~stEET SHEETS
~
SUR't'EY IN( YAP:: ..........
EXisting Asphalt
Staging Area
Existing -----
Fence
Existing
Shed
11. 40' ~'
I
Pump
Station
Proposed
Temporary
Dewatering Tanks
/~//A" ~
~--8---
~ Proposed
Dredging Area
Proposed Temporary
Silt Curtain
Existing
Trash Rack
Apron
Approximate
O.H.W.M.
Black River
Direction of Flow
6J
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.....
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6-2008 I ~NJ6IrNCE No • DESIGN DmR£D:: LJCA DOlAN
8-2008
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SEClUENT RBtOVAL
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Pam~. DInIcftx PLAN \lEW SHEETS
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Trash
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Floor Plates
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"
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Concrete
Apron
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....,..,... ......,.... Xl( FED. AID No. -------J
I'RO.ECT '
SUIMY MSE MAP: MANAGER: JOHN KOON 6 2008
_ """""" PROJECT No. FlO104
SURVEY No. ------1
HUM. R!VISIOM __ OESIQN £N1ERED: LJCA DUlAH 6-2008 MAINTENANCE •• ....... DMSlDN No.
Overhead Crane
Pump
Sediment
~ King County
DapartmanI of NauaI Reeourms and PaIk:a
water and Land Resources 0Msi0n ......... __ ....
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SHEET
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SURVEY BASE WAf>: w.NAGER: JOHN KOON 6 2008
CHECKED: DESIGNED: PROJECT No. FlO104 SURVEY No. ______ ---1
NUIoI. REVISION DESIGN ENTEREO: UCA DUlAN 6-2008 MAJNTENANCE BY 041£ DMSION No.
SUBJECT PARCEL
(377920090)
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W King County
Deparfment d NstlnI A8ecutee end Pwb
Watef and land Resources 0Msi0n
Rlvwand FIoodpWn ......... Nnt Unit
BLACK RNER PUMP STATION
SEDIMENT REMOVAL
SHEEr
4
OF
PHASE 1 4
Pam""""",_ taClH!ORHOOD MAP SHEETS
City of Renton
LAND USE PERMIT
MASTER APPLICATION
PROPERTY OWNER(S) PROJECT INFORMATION
I
NAME ',<;\';;'..,. L"(/"'~(i Fc."Z..D
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ADDRESS: ? c? 1 5 ~c\"$"'" s...,. j;.. OOOL
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CITY: :?5~'~ ZIP q~IO '1 v
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PROJECT OR DEVELOPMENT NAME:
\31"c\: ~)-.u. Yv-t> S\.,.\,'" ~t--\ ~...,".\" ,"".
PROJECT/ADDRESS(S)/LOCATION AND ZIP CODE:
55'0 .M l.?~ ., -\,. V" Q ", .. J. "t ~o5r
TELEPHONE NUMBER:
/., -\ &01>1 ~qO-'Z-SbZ. KING COUNTY ASSESSOR'S ACCOUNT NUMBER(S):
APPLICANT (if other than owner) 377qZOoO~O
NAME:
-S~"'V\ \C, ,::> .,. ""
EXISTING LAND USE(S):
t'v-o S b\-..",..,
COMPANY (if applicable):
'? ~ VI c., (0 "" ..... -\ ""
PROPOSED LAND USE(S):
AJo L.\"c.-~L
• y
ADDRESS:
70\ S, joe'l So", St.SI;-U; ~
EXISTING COM':[~HENSIVE PLAN MAP DESIGNATION: :tI:'l J '
CITY: ~.-:;IT\~ ZIP: C( '61 0 t.j-PROPOSED COMPREHENSIVE PLAN MAP DESIGNATION
(if applicable): f'I/A
TELEPHONE NU,)ER
(Z&b ?>«D-Z-sb2-EXISTING ZONING: PL..
CONTACT PERSON PROPOSED ZONING (if applicable): NIA
NAME: SITE AREA (in square feet): 1'500
.A .cw hoca' 'f\-t SQUARE FOOTAGE OF PUBLIC ROADWAYS TO BE
COMPANY (if applicable): DEDICATED: Nc:>"-L
,
SQUARE FOOTAGE OF PRIVATE ACCESS EASEMENTS:
ADDRESS: N/It
PROPOSED RESIDENTIAL DENSITY IN UNITS PER NET
CITY: ZIP:
ACRE (if applicable): tvlA
NUMBER OF PROPOSED LOTS (if applicable):
TELEPHONE NUMBER AND E-MAIL ADDRESS: AliA
NUMBER OF NEW DWELLING UNITS (if applicable):
JIIM
C:\Documents and SettingsVkoo\Locai Settings\Temporary Internet Files\OLKI2\masterapp.doc -I '
PR ECT INFORMATION (conti I -=idL-.) ______ --.
NUMBER OF EXISTING DWELLING UNITS (if applicable):
NI.A
SQUARE FOOTAGE OF PROPOSED RESIDENTIAL
BUILDINGS (if applicable): IVI.A
SQUARE FOOTAGE OF EXISTING RESIDENTIAL
BUILDINGS TO REMAIN (if applicable): f'J I p.,
SQUARE FOOTAGE OF PROPOSED NON-RESIDENTIAL
BUILDINGS (if applicable): NIA
SQUARE FOOTAGE OF EXISTING NON-RESIDENTIAL
BUILDINGS TO REMAIN (if applicable): 64~D
NET FLOOR AREA OF NON-RESIDENTIAL BUILDINGS (if
applicable): 6 'i e,O I lAC/> ;'Wo~""-\
NUMBER OF EMPLOYEES TO BE EMPLOYED BY THE
NEW PROJECT (if applicable): filA
PROJECT VALUE: -.:Ii I 6" 0 J oeo
IS THE SITE LOCATED IN ANY TYPE OF
ENVIRONMENTALLY CRITICAL AREA. PLEASE INCLUDE
SQUARE FOOTAGE (if applicable):
o AQUIFER PROTECTION AREA ONE
o AQUIFER PROTECTION AREA TWO
o FLOOD HAZARD AREA sq. ft.
o GEOLOGIC HAZARD sq. ft.
o HABITAT CONSERVATION sq. ft.
fi SHORELINE STREAMS AND LAKES ;'8 sO sq. ft.
o WETLANDS sq. ft.
LEGAL DESCRIPTION OF PROPERTY
(Attach legal description on separate sheet with the following infonnation included)
SITUATE IN THE S E Ii "l QUARTER OF SECTION 1:2 TOWNSHIP "z '-. RANGE oy IN THE CITY
OF RENTON. KING COUNTY. WASHINGTON.
TYPE OF APPLICATION & FEES
List all land use applications being applied for:
1. 'Ss Of}! 3.
2. 4.
Staff will calculate applicable fees and postage: $
AFFIDAVIT OF OWNERSHIP
I. (Print Name/s) -:5&"'" "'" ~O'" V\ . declare that I am (please check one) _ the Clment owner of Ihe property
involved in this application or \7 the authorized representative to act for a corporation (please attach proof of authorization) and that the foregOing
statements and answers herein contained and the information herewith are in all respects true and correct to the best afmy knowledge and belief.
I certify that I know or have satisfactory evidence that.-=::-cc=_-:;-~:----:-~
signed this instrument and acknowledged ~ to be hisJherllheir tree and voluntary act for the Q cA.c=-= ~~ uses and purposes mentioned in the instrument
\
(Signature of Owner/Representative)
Notary Public in and for the State of Washington
(Signature of Owner/Representative)
Notary (Print), ___________ _
My appOintment expires' ________ _
C:\Documents and Settings\Jkoo\Local Settings\Temporary Internet Files\OLKI2\mssterapp.doc -2 -
01/20/2008 PIU 1212!i FAX Q21!i4;1~1j~Q C1ty or l4,en'tOl"l aEi/fluHlH'
• DEVELOPMENT SERVICES DIVISION
WAIVER OF SUBMITTAL REQUIREMENTS
FOR LAND USE APPLICATIONS
rhis requirement may btl waived by;
I. Property SetVice6 Section
!. Pubtic Works Plan Review Section
I. Building Section
k Development Planning Section
;! II,. 3
DEVELOPMENT SERVICES OMSION
WAIVcn. OF SUBMITTAL REQUIRE ... ...:NTS
FOR LAND USE APPUCATIONS
rhls requirement may be waIwd by:
I. Property SetVice6 Section
!. Public WorkS Plan Review Section
I. Building Section
k Development Planning Sectlon
Q:\weB\PWIOeVSERVlFOIm$lPlanninglMIv~,ofsubmitlain"l' J~~ .• I.
Black River Pump Station Sediment Removal JUL -3
Phase 1: Pilot Project t;J ....
~' ~ .';""":~: .
Project Narrative for City of Renton Shoreline Substantial Development Request
a) Project name, size and location of site
Black River Pump Station Sediment Removal Pilot Project
The Black River Pump Station, also referred to as the P-l pump station, is located
on the Black River at River Mile 0.33 in the city of Renton. The address of the
facility is 550 Monster Road. The facility is in the SE 1/4 Section 13, T23N R4E.
The dredging area is located at latitude N 47.4752, longitude W 122.24496.
Proposed work includes removal of sediment from a 1540 square foot area inside the Black
River Pump Station. Equipment will be operated from a 4000 square foot asphalt utility area
and a 1200 square foot area in the Black River Natural Area that is currently vegetated with
mowed grass (-1000 square feet) and with Himalayan Blackberry (-300 square feet).
Access will be along an existing 800 foot long primitive road that runs along the right (north)
bank of the Black River between Monster Road and the Black River Pump Station.
b) Brief description of proposed work
This project will result in the removal of approximately 150 cubic yards of sediment from
within the concrete structure of the Black River Pump Station to allow two pumps that have
been out of service to be repaired, tested and retumed to active status.
The Black River Pump Station 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 be flooded by
backflow through 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 Channel.
The Black River Pump Station was initially constructed in 1971. In 1986 the channel upstream
of the pump station, or forebay, was greatly enlarged, thereby increasing the storage area for
flood flows. Since the construction of the larger forebay, sediment has accumulated upstream
of the dam, including the area around the pump intakes. While this has kept the material out of
the GreenlDuwamish River, the sediment has now reached a level that threatens the operation
of the pumps. To allow continued operation of the pumps, sediment immediately adjacent to
the pump intakes needs to be removed and a monitoring and maintenance program needs to
be established to meet ongoing sediment management needs.
The current pilot proposal is to remove approximately 150 cubic yards of sediment from in front
of two of the pump intakes to meet immediate pump station maintenance needs. This work will
meet immediate needs related to flood risk reduction and floodplain mapping in the Green
River floodplain. If the current proposed maintenance work is not completed, the ability of the
pump station to return flood flows from a right bank breach of Green River levees will be
reduced by approximately 35%. In addition to the increased risk to people and property
posed by not having these pumps in service, this reduction in the ability to evacuate flood
waters may result in an increase in the mapped base flood elevations for parts of the cities of
Black River Sediment Removal
Page 1 of 4
Renton and Kent. Increased based flood elevations will increase flood insurance needs city
for businesses and will adversely impact economic development in the cities of Renton and
Kent.
Specific actions proposed as part of this maintenance project include:
1. Create a temporary sediment dewatering area in the grassy area immediately north of the
dam. The dewatering area will be comprised of a number of lined 47 cubic yard shipping
containers fitted with and geotextile fabriC Geotubes or comparable dewatering structures.
It is anticipated that between three to five containers will be on site at any given time. The
actual number will depend on a number of variables such as rate of sediment removal and
dewatering, and the rate at which the waste disposal contractor is able to supply and export
the containers.
2. Install the existing concrete stop blocks in each of the pump bays to be cleaned (Zone 1
on plan set. profile) to isolate the pump bays from the surrounding waters. In addition,
install a geotextile turbidity curtain immediately outside the pump bays in the forebay area
to contain any sediment that may be suspended while the area between the pump bays
and the trash rack (Zone 2) is being cleaned.
3. Establish water quality monitoring stations for turbidity monitoring at the following
locations:
3.1. within the work area when work is completed to ensure turbidity within the silt curtain
is no more than 5 NTUs greater than background prior to removal of the turbidity
curtain.
3.2. outside and at least 100 feet upstream of the work area
3.3. downstream of the dam near the low flow pump outfall
4. Using a hydraulic dredge suspended from the existing overhead cranes on the pump
station the building, pump sediment from the proposed work area to the temporary
dewatering facility described above. Other suction devises such as a vactor truck or
portable water pumps may also be used to complete the sediment removal work.
5. Throughout the dredging process, water segregated by the Geotubes in the shipping
containers will be pumped into a tanker truck and transported off-site to a wastewater
treatment facility. If permitted, a limited amount of water will be recycled as process
water for use when cleaning the parts of the pump bays that are isolated from the
forebay. When all work is completed, this recycled water will also be exported to a
wastewater treatment facility.
6. If, during the course of the dredging and settling period, water quality monitoring reveals
that state standards are at risk of being exceeded, mitigation actions will be taken. These
actions will be selected from the following options:
6.1. Stop work.
6.2. Adjust the turbidity curtain to eliminate leaks.
6.3. Add a second turbidity curtain outside the first curtain to improve containment.
6.4. Bypass flows coming into the forebay by pumping from a point at least 100 feet
upstream of the turbidity plume to allow baseflows to continue to the Black River
channel without passing though the forebay.
7. Once sediment has been sufficiently dewatered, transfer the sediment off-site to an
appropriate solid waste disposal facility.
8. Remove all equipment from the dewatering area. and reseed any areas that may have been
disturbed during the placement and removal of shipping containers.
Black River Sediment Removal
Page 20f4
9. Map sediment levels in the excavation area immediately after the excavation is complete
and the following spring to determine changes in sediment distribution.
10. Use infonmation gained during the pilot project to estimate future sediment management
needs and to develop long-term management alternatives.
c) Basis for the exemption request (reference exemption category from first page)
Normal maintenance or repair of existing structure.
d) Anticipated dates of work
To accommodate early summer Great Blue Heron nesting and late summer/fall fisheries
censtraints sediment removal is planned for August 15 to 31, 2008. If permits cannot be
secured by this date, then work will be done during this same period in 2009.
e) Other permits required for proposed project
Hydraulic Project Approval
Industrial Discharge Permit for the discharge of water to the wastewater treatment facility
King County has made a determination of non Significance for this maintenance work and is
in the process of completing the SEPA process.
f) Current and proposed use of the site
The site is currently used as a flood centrol facility which includes a dam across the Black
River Channel, a pump house that sits atop the dam, a small office, three above-g round diesel
storage tanks, an asphalt storage area and a gravel parking lot. Land uses adjacent to the
pump station include open space and a road. The surrounding area includes a railroad line, a
concrete recycling facility and residential and commercial properties.
The proposed maintenance work will not change the land use in the area.
g) Special site features (i.e. wetlands, water bodies, steep slopes)
The forebay of the Black River Pump Station backs up into the Black River Riparian Forest.
The forebay and the forest provide valuable habitat to a variety of birds and other wildlife,
including a Great Blue Heron Colony and a pair of Bald Eagles.
The Black River enters the Green River approximately 1/3 of a mile downstream of the Black
River Pump Station.
h) Statement addressing soil type and drainage conditions
The material being removed is primarily fine silt. This material will be saturated when
removed. The area from which the sediment is being removed is cencrete.
i) Total estimated construction cost and estimated fair market value of the proposed
project
$100,000-$150,000
j) Estimated quantities and type of materials involved if any fill or excavation is
proposed
Black River Sediment Removal
Page 3 of 4
Approximately 150 cubic yard of fine sediment will be exported from the site.
k} Number, type and size of any trees to be removed
No trees will be removed as a result of this maintenance activity.
I) Distance from closest area of work to the Ordinary High Water Mark of the shoreline
The work will occur below the ordinary high water mark within the Black River Pump station.
m) Nature of the existing shoreline (e.g. high bank, naturalize, rip rap, bulkhead, etc.)
The shoreline in the work area is a concrete dam. Immediately upstream of the work area
the shoreline is a concrete bulkhead. Further upstream, the constructed forebay has
become largely naturalized and has adapted to the water current water level which, based
on the pump station operations, is kept between the elevations of 3 and 6 feet.
n} If the proposed project exceeds a height of 35-feet above the average grade level,
discuss the approximate location of and number of residential units, existing and
potential, that will have an obstructed view
The proposed maintenance work will not affect views.
Black River Sediment Removal
Page 4 of4
King County Property Description for parcel number 3779200090 Pagelof3
HOME NEWS SERVICES DIRECTORY CONTACT
KCGIS Center
www.KingCounty,gov/GIS
............ -.. -""'.~~,~: •• ,:;' ',;';:' .. ~.:.,'. -..', "~-'."~-.. .,~~-~-~--.. ,~ .. ~'--'-.. ----~ ~--'0.:::;:-
KCGIS Parcel Reports Assessor information for parcel number 3779200090
Property Report
Districls and Development
Conditions Report
Find Your Council District
Find Your Watershed
KCGIS Center
King County GIS Center
King Street Center
201 S. Jackson SI.
Suite 706
Seattle, WA 981 04
giscenter@kingcounty,gov
+ 47,59909 N
-122,33136 W
+ 47' 35' 56,72"
-122019' 52.90"
Taxpayer name RENTON CITY OF f'arc.e!.n_uf11~.er. . ...... ~?!lI~()OC
Mailing address 1055 S GRADY WAY
RENTON WA 98055
Tax Acco .... n~.n..l'l11ber 1!7920()C
~I"e,,>, COd".. __ ._._ ....... , ~1 O~_
Legal description
~isdiction __ ,..._, __ .. REfoj!,o!'l
,P,:"".e.nt,use, ... __ . Utility, PI
~~praised value .. __ ,$1,443!?C
JUNCTION ADD POR TRS 21-22-23-24 & 25A & POR TRS 26 & 29 RENTON SHORELA
ADD BEG SW COR SEC 13-23-04 TH E 1271.74 FT TH N TAP ON BDRY LN BET TRS 2
RENTON SHORELANDS 2ND SUPL ADD & TPOB TH CONTG N 275 FT TH W 280.69 F
W 377.52 FT TH S 74-13-19 WTO ELY MGN OF CO RDTH SELY ALG SD ELY MGN TC
SD TR 29 TH ELY ALG SD SLY BDRY TO TPOB ALSO BEG TPOB ABOVE DESC TH ~
TANGENT CURVE TO RGT RAD OF 627.46 FT TAP ON BDRY LN BEG TRS 26 & 27 01
LDS 2ND SUPL ADD TH SWLY ALG SD BDRY LN TO BEG LESS PORTION FOR CO R
--o-.,---~~ '-'~' .... ~"-~=--'7"'---------------
Sales/Quit Claims/Transfers
Sale datie Sale Buyer Seller Excise Recording Instru
. price tsx number tyl
number
~:1997 -$0 ·'·C-,,-------~~ -,--~-~------RENTON GREEN RIVER 1(;40920 199..7.Q4.4.9.1.916. Warrar
CITY OF FLOOD Deed
CONTROL
lONEDIST.
Parcel description, ___________________ _
Property KING COUNTY PUMPING
name STATION
Property C -COMMERCIAL
type ,, __ _
Pres~!,,_u~~_ Utility, Publi-" .. __ ~ ... , .. __ ... _ ...
Lot ar"a. __ . 281,340 sq. ~Jl;,46."c:res)
Plat JUNCTION
name ADD
Plat
block
Plat lot PORS
-----~ --~~--~~-.-.------.,.-
O-S-T-SW-13-23-4
R
Water
systef11.~_ ..
Sewer
system
Access
Street
surface
' .... ~".~'.___c-"'7"c:__--------------
Commercial building:!....::'d.:::e~sc~r~ip:::t::.:io::n:.., ____________ _
. Buil~~n~~ .... _.,_.
Year built
1 of 2
1971
Building PUMP STATION
_d,,,scription_ _ ___ , ____ .. '"_,_,~ ..... '" '" ..
Predominant use EQUIPMENT (SHOP) E
http://www5.kingcounty.govIKCGISReports/property ,report.aspx?PIN=3 779200090 6/27/2008
King County Property Description for parcel number 3779200090
Construction
class
Building shape
PREFAB STEEL
Rect or Slight Irreg
!3ui~ding___ _ ____ 2._01_2_ .. _
Year built 1971
Stories 1 _M ___ • _______ _
Jl_uilding quality AVERAGE
Construction
class
Building shape
MASONRY
Rect or Slight Irreg
Taxable value history
Page 2 oD
Elevators
Building PUMP STATION
. descripti~ _____ . ___ .. _ ... _ .... _ ..... _. ___ . __ . __
Predominant use EQUIPMENT (SHOP) E
Gross sq. ft .. __ ._.~~ __ . ____ ._ .. __ '._
Net s'Lft_. ____ ~I!.. _________ ._
Heating system ELECTRIC WALL
Sprinklers N ---='-='='------_.-._-------_.
Elevators
Tax year Tax status Taxable value reason Appraised value Taxable value
2009 EXEMPT EXEMPT $1.406.700 (land) $0 (Iandj---
+ m...o..oo (improvements) + so. (improvement
$1,443,700 (total) $0 (tolal)
2008 EXEMPT EXEMPT $1.406.700 (land) $0 (land)
+ ~ (improvements) + so. (improvement
$1,442,800 (total) $0 (total)
2007 EXEMPT EXEMPT $1.406.700 (land) $0 (land)
-+ ~ (improvements) + .so. (improvement:
$1,440,200 (total) $0 (total)
2006 EXEMPT EXEMPT $1.406.700 (land) SO (land)
+ 10. (improvements) + so. (improvement
$1,406,700 (Iotal) $0 (Iotal)
Related resources
King County Assessor: SY.bmit.uequest to correct infg.rrnati.onJnll:1illxeR-o.rt
King County Assessor: eReal Property Report (PDF format requires Acrobat)
King County Assessor: Quarter .. S.!H;tio.n.MlIp (PDF format requires Acrobal)
King County GIS: .Property information FAQ
King County GIS: DistriCts and Development Conditi.onLRe.port (a detailed report ab,
this property)
King County DOES: Permit Applications Report (for unincorporated areas only)
King County Treasury Operalions: .P!:o.~rty_IJlXlnfImmItitmJQI.thi!i.IlIoPllr!):_
King County Recorders Office: Excise Tax AffldavillLRllP-Qrt
King County Recorders Office: Scanned images !!l/2lat!I .•
King County Recorders Office: Scanned images of surveys and other map dQcuments
Open.iMAP_Io.thisIlIoper!):. (requires a high sl!8ed internet connection)
OpellPar.ceLlliewer...IO.1hiIlP(o.perty: (any connection speed, but less features than iMt
http://wwwS.kingcounty.govIKCGISReports/property Jeport.aspx?PIN=3779200090 6/2712008
tQ
King County
Water and Land Resources Division
Department of Natural Resources and Parks
King Street Center
201 South Jackson Street, Suite 600
Seattle, WA 98104-3855
206.296.6519 Fax 206.296.0192
TTY Relay: 711
June 24, 2008
Jennifer Henning
Current Planning Manager
Department of Community and Economic Development
City of Renton
1055 S. Grady Way
Renton, W A 98057
PLANNING OEVEdi~~~WEN10N
JUN 25 200S
RECEWEO
RE: Black River Pump Station Sediment Removal Pilot Project -Project #FLDI04
Dear Ms. Henning:
Enclosed for your review and comment are the State Environmental Policy Aet Checklist and
Determination of Non-Significance for the above-referenced project.
Project Description
King County Water and Land Resources Division proposes to remove sediment from the forebay
of the Black River Pump Station. The current pilot proposal is to remove approximately 150
cubic yards of sediment from in front of the pump intakes to meet immediate pump station
rr,aintenance needs. The program will include routine monitoring of sediment migration and
accumulation within the forebay to assess the need for future sediment management actions.
The Black River Pump Station 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 be flooded by backflow
through 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 Channel.
Project Location
The Black River Pump Station, also referred to as the P-l pump station, is located on the Black
River at River Mile 0.33 in the city of Renton. The address of the facility is 550 Monster Road.
The facility is in the SE 114 Section 13, T23N R4E. The dredging area is located at latitude N
47.4752, longitude W 122.24496.
Jennifer Henning
June 24, 2008
Page 2
The enclosed documents are available for review and comment until July 10, 2008.
All comments must be received (or postmarked) by that date.
Please review these documents, and direct any questions or comments that you may have to
Project Manager John Koon at 206-296·8062, or write to:
John Koon, Project Manager
River and Floodplain Management Unit
King County Water and Land Resources Division
201 South Jackson Street, Suite 600
Seattle, W A 98104-3855
Thank you for your assistance.
Wm. Laird O'Rollins
Ecologist, Ecological Services Unit
WLO:ska
Enclosures
cc: Steve Bleifuhs, Manager, River and Floodplain Management Unit
Diane Concannon, Manager, Ecological Services Unit
John Koon, Engineer, River and Floodplain Management Unit
til
King County
Water and Land Resources Division
Department of Natural Resources and Parks
King Street Center
201 South Jackson Street, Suite 600
Seattle, WA 98104-3855
206-296-6519 Fax 206-296-0192
TTY Relay: 711
NI PlJ'NNING OEVEa~'t~ RENION
.lUt-ll 5 2008
RECENEU
Determination of Non-Significance
Name of Proposal: Black River Pump Station Sediment Removal Pilot Project
Description of Proposal:
King County Water and Land Resources Division proposes to remove sediment from the forebay
ofthe Black River Pump Station. The current pilot proposal is to remove approximately I SO
cubic yards of sediment from in front of the pump intakes to meet immediate pump station
maintenance needs. The program will include routine monitoring of sediment migration and
accumulation within the forebay to assess the need for future sediment management actions.
The Black River Pump Station consists of a dam across the historic Black River channel and
eight pumps that sit atop the dam. The dam prevents flooding ofthe levee-protected area in the
northeast portion of the lower Green River valley that would otherwise be flooded by backflow
through 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 Channel.
Location of Proposal:
The Black River Pump Station, also referred to as the P-I pump station, is located on the Black
River at River Mile 0.33 in the city of Renton. The address of the facility is 550 Monster Road.
The facility is in the SE 114 Section 13, T23N R4E. The dredging area is located at latitude N
47.4752, longitude W 122.24496.
Responsible Official: Mark Isaacson
Position/Title: Division Director, Water and Land Resources Division
Address: 201 South Jackson Street, Suite 600
Seattle, WA 98104-3855
DATE: SIGNAT
D/08-6118/08
Determination of Non-Sigmficance
Black River Pwnp Station Sediment Removal Pilot Project
Page 2
Proponent and Lead Agency: King County Department ofNaturaI Resources and Parks
Water and Land Resources Division
Contact Person(s): John Koon, Project Manager, 206-296-8062
The lead agency for this proposal has determined that it does not have a probable significant
adverse impact on the environment. An Environmental bnpact Statement (EIS) is not required
under Revised Code of Washington (RCW) 43.21C.030(2)(c). This decision was made after
review of a completed environmental checklist and other information on file with the lead
agency. THIS INFORMATION IS AVAILABLE TO THE PUBLIC ON REQUEST (for a
nominal photocopying fee).
THIS DETERMINATION OF NON-SIGNIFICANCE (DNS) is issued under Washington
Administrative Code (WAC) 197-11-340(2); the lead agency will not act on this proposal until
after July 10,2008. Comments must be submitted by that date.
For additional information, please contact:
0108·
John Koon, Project Manager
206-296-8062
King County Water and Land Resources Division
201 South Jackson Street, Suite 600
Seattle, WA 98104-3855
61\ 8108
W
King County
ENVIRONMENTAL CHECKLIST
PLANNING DEV'Ei~~~~FNT0~\
JUN 152008
RECENEu
Black River Pump Station Sediment Removal Pilot
Project
Purpose of the Checklist:
The State Environmental Policy Act (SEPA), Chapter 43.21 RCW, requires all governmental
agencies to consider the environmental impacts of a proposal before making decisions. An environ-
mental impact statement (EIS) must be prepared for all proposals with probable significant adverse
impacts on the quality ofthe environment. The purpose of this checklist is to provide information to
help you and the agency identify impacts from your proposal (and to reduce or avoid impacts from
the proposal, if it can be done) and to help the agency decide whether an EIS is required.
Instructions for Applicants:
This environmental checklist asks you to describe some basic information about your proposal.
Governmental agencies use this checklist to determine whether the environmental impacts of your
proposal are significant, requiring preparation of an EIS. Answer the questions briefly, with the most
precise information known, or give the best description you can.
You must answer each question accurately and carefully, to the best of your knowledge. In most
cases, you should be able to answer questions from your own observations or project plans without
the need to hire experts. If you really do not know the answer, or if a question does not apply to your
proposal, write "do not know" or "does not apply." Complete answers to the questions now may
avoid unnecessary delays later.
Some questions ask about governmental regulations, such as zoning, shoreline, and landmark
designations. Answer these questions if you can. If you have problems, the governmental agencies
can assist you.
The checklist questions apply to all parts of your proposal, even if you plan to do them over a period
of time or on different parcels of land. Attach any additional information that will help describe your
proposal or its environmental effects. The agency to which you submit this checklist may ask you to
explain your answers or provide additional information reasonably related to determining if there
may be a significant adverse impact.
Use of Checklist for Nonproject Proposals:
Complete this checklist for nonproject proposals, even though questions may be answered "does not
apply." In addition, complete the SUPPLEMENTAL SHEETFOR NONPROJECT ACTIONS
(PART D).
For nonproject actions, the references in the checklist to the words "project," "applicant," and
"property or site" should be read as "proposal," "proposer," and "affected geographic area,"
respectively.
King County Environmental ' ____ cklist Black River Pump Stat; ediment Removal Pilot Project
A. BACKGROUND
1. Name of the proposed project, if applicable:
Black River Pump Station Sediment Removal Pilot Project.
2. Name of Applicant:
King County Department of Natural Resources and Parks
Water and Land Resources Division
3. Address and phone number of applicant and contact person:
John Koon, Engineer
King County Water and Land Resources Division
201 South Jackson Street, Suite 600
Seattle, WA 98104-3855
Phone: 206-296-8062
Fax: 206-205-5134
4. Date checklist prepared:
June 17,2008.
5. Agency requesting checklist:
King County Department of Natural Resources and Parks
Water and Land Resources Division
6. Proposed timing or schedule (include phasing, if applicable):
To accommodate early summer Great Blue Heron nesting and late summer/fall fisheries
constraints sediment removal is planned for August 15 to 31, 2008. Ifpermits cannot be
secured by this date, then work will be done during this same period in 2009.
7. Do you have any plans for foture additions, expansion, or forther activity related to or
connected with this proposal? If yes, explain.
This pilot program addresses the immediate needs of pump station operation but will only
remove a small portion of the accumulated sediment. Additiol)-al work will be needed in
future years to address on-going sedimentation problems. The purpose of the pilot project is
to address immediate needs and evaluate the effectiveness and practicality of a routine
sediment removal program to keep the pump intakes free of sediment.
8. List any environmental information you know about that has been prepared, or will be
prepared, directly related to this proposal.
a) King County Water and Land Resources Division, River Management Program. 2003.
Progranunatic Biological Effects AnalYSis. 100 pages plus appendices.
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b) King County Water and Land Resources Division. January 2007. 2006 King County
Flood Hazard Management Plan. 350 pages plus appendices.
c) King County Water and Land Resources Division. February 2008. Characterization of
sediment samples collected from the Black River Pump Station. Unpublished
laboratory data.
9. Do you know whether applications are pending for governmental approvals of other
proposals directly affecting the property covered by your proposal? If yes, explain.
No.
10. List any government approvals or permits that will be needed for your proposal, if known.
City of Renton
Grade and Fill Permit
Shoreline Substantial Development Permit Exemption
King County
Industrial Waste Sewer Discharge Permit
State of Washington
Hydraulic Project Approval
Environmental Review Threshold Determination
11. Give a brief, complete description of your proposal, including the proposed uses and the
size of the project and site. There are several questions later in this checklist that ask you
to describe certain aspects of your proposal. You do not need to repeat those answers on
this page. (Lead agencies may modifo this form to include additional specific information
on the project description.)
The Black River Pump Station 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 be flooded by
backflow through the Black River Channel. The pumps convey Springbrook Creek and flows
from local drainages system from the landward side ofthe levee system to the Green River
via the Black River Channel.
The Black River Pump Station was initially constructed in 1971. In 1986 the channel
upstream, or forebay, was greatly enlarged increasing storage area for flood flows. Since the
construction of the larger forebay, sediment has accumulated upstream of the dam, including
the area around the pump intakes. While this has kept the material out of the
GreenlDuwamish River, the sediment has now reached a level that threatens the operation of
the pumps. The sediment level is still mostly below the live-storage area of the forebay;
however, it is also beginning to impact the stormwater storage capacity of the facility. To
allow continued operation ofthe pumps, sediment immediately adjacent to the pump intakes
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needs to be removed and a monitoring and maintenance program needs to be established to
meet ongoing sediment management needs.
The current pilot proposal is to remove approximately 150 cubic yards of sediment from in
front of two of the pump intakes to meet immediate pump station maintenance needs. The
program will include routine monitoring of sediment migration and accumulation within the
forebay to assess the need for future sediment management actions.
Specific actions proposed as part of this project include:
A) . Create a temporary sediment dewatering area in the grassy area immediately north of the
dam. The dewatering area will be comprised ofanumber oflined 47 cubic yard
shipping containers fitted with and geotextile fabric Geotubes or comparable dewatering
structures. It is anticipated that between three to five containers will be on site at any -
given time. The actual number will depend on a number of variables such as rate of
dredging and dewatering, and the rate at which the waste disposal contractor is able to
supply and export the containers.
B) Install the existing concrete stop blocks in each of the pump bays to be cleaned (Zone
1) to isolate the pump bays from the surrounding waters. In addition, install a
geotextile turbidity curtain immediately outside the pump bays in the forebay area to
contain any sediment that may be suspended while the area between the pump bays
and the trash rack (Zone 2) is being cleaned.
C) Establish water quality monitoring stations for turbidity monitoring at the following
locations:
1) within the work area when work is completed to ensure turbidity within the silt
curtain is no more than 5 NTUs greater than background prior to removal of the
turbidity curtain.
2) outside and at least 100 feet upstream of the work area.
3) downstream of the dam near the low flow pump outfall.
D) Using a hydraulic dredge suspended from the existing cranes inside and outside the
building, pump sediment from the proposed work area to the temporary dewatering
facility described above. Other suction devises such as a vactor truck or portable
water pumps may also be used to complete the sediment removal work.
E) Throughout the dredging process, water segregated by the Geotubes in the shipping
containers will be pumped into a tanker truck and transported off-site to a wastewater
treatment facility. If permitted, a limited amount of water will be recycled as process
water for use when cleaning the parts of the pump bays that are isolated from the
forebay. When all work is completed, this recycled water will also be exported to a
wastewater treatment facility.
F) If, during the course of the dredging and settling period, water quality monitoring
reveals that state standards are at risk of being exceeded, mitigation actions will be
taken_ These actions will be selected from the following options:
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1) Stop work.
2) Adjust the turbidity curtain to eliminate leaks.
3) Add a second turbidity curtain outside the first curtain to improve containment.
4) Bypass flows coming into the forebay by pumping from a point at least 100 feet
upstream ofthe turbidity plume to allow baseflows to continue to the Black
River channel without passing though the forebay.
G) Once sediment has been sufficiently dewatered, transfer the sediment off-site to an
appropriate solid waste disposal facility.
H) Remove all equipment from the dewatering area and reseed any areas that may have
been disturbed during the loading and unloading of shipping containers.
I) Map sediment levels in the excavation area, immediately after the excavation is
complete and the following spring, to determine changes in sediment distribution.
J) Use information gained during the pilot project to estimate future sediment management
needs and to develop long-term management alternatives.
12. Location of the proposal. Give sufficient information for a person to understand the
precise location of your proposed project, including a street address, if any, and section,
township, and range, if known. If a proposal would occur over a range of area, provide the
range or boundaries of the siteM. Provide a legal description, site plan, vicinity plan, and
topographic map, if reasonably available. While you should submit any plans required by
the agency, you are not required to duplicate maps or detailed plans submitted with any
permit applications related to this checklist.
The Black River Pump Station, also referred to as the P-l pump station, is located
on the Black River at River Mile 0.33 in the city of Renton. The address of the
facility is 550 Monster Road. The facility is in the SE 114 Section 13, T23N R4E.
The dredging area is located at latitude N 47.4752, longitude W 122.24496.
B. ENVIRONMENTAL ELEMENTS
1. Earth
a. General description of the site (underline one): flat, rolling, hilly, steep slopes,
mountainous, other.
The sediment removal area is within the concrete structure of the Pump station. The
turbidity curtain will be placed just outside the structure in the pump station forebay.
The bottom of the dredging area is made of concrete.
The flat dewatering area is currently vegetated with grass and Himalayan Blackberry.
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b. What is the steepest slope on the site (approximate percent slope)?
The ste\lPest slope in the work area is the vertical concrete wing wall on the side of the
forebay. The steep gravel upper banks of the forebay which have a slope of roughly'
2H:IV will not be disturbed.
c. What general types of soils are found on the site (for example, clay, sand, gravel, peat,
muck)? If you know the classification of agricultural soils, specifY them and note any
prime farmland.
Visual inspection of the sediment suggests that is it made up of silts and organic
material.
d. Are there suiface indications or history of unstable soils in the immediate vicinity? If
so, describe.
There is no evidence of surface instability in the upland and adjacent river bank areas.
e. Describe the purpose, type, and approximate quantities of any jilling or grading
proposed. Indicate the source of jill.
Approximately 150 cubic yards of sediment will be removed.
f Could erosion occur as a result of clearing, construction, or use? If so, generally
describe.
No. All work areas are either already paved or flat vegetated areas. Some Himalayan
Blackberry will need to be mowed to temporarily stage shipping containers on-site. The
footprint of the facility will not increase.
g. About what percent of the site will be covered with impervious suifaces after project
construction (for example, asphalt or buildings)?
Impervious cover will not change.
h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any:
2. Air
All dewatering water will be piped to prevent contact with the ground and eliminate
erosion potential.
a. What types of emissions to the air would result from the proposal (for example, dust,
automobile, odors, industrial wood smoke, greenhouse gases) during construction and
when the project is completed? If any, generally describe and give approximate
quantities, if known.
Implementation of the proposed maintenance work will require the use of various
vehicles and pieces of equipment that emit gasses with the potential to affect climate.
These gasses include carbon dioxide (C02 ), methane and nitrous oxide, as well as
others in much smaller amounts. The global warming potential (GWP) of these
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compounds is measured in "carbon dioxide equivalents," or C02e, which converts the
GWP of various gasses into their equivalent in CO2 • The amount of C02e that may be
emitted as a result of constructing the proposed project has been estimated by
computing the amount of fuel to be consumed by equipment used to construct the
project, both during construction and in transit from King County's Roads
Maintenance Headquarters Shops in Renton, where most crews and equipment
originate. For this project, C02e emissions were roughly calculated for the
transportation of removed sediment to the Roosevelt Regional Landfill near
Goldendale, Washington by diesel locomotive from the railhead at Renton, very near
to the project site, as well as for project site equipment usage. Fuel consumed is then
converted into C02 e emitted using formulae developed by the Energy Information
Administration (EIA) of the U.S. Department of Energy.
Using these formulae and estimates, implementation of the maintenance work will
likely result in the discharge of approximately 1.4 tons of C02 e to the atmosphere.
b. Are there any off-site sources of emissions or odor that may affect your proposal? If
so, generally describe.
No.
c. Proposed measures to reduce or control emissions or other impacts to the air, if any:
Standard vehicle emission standards will apply to all vehicles. Use of rail cars will result
in less air pollution than if trucks alone were used to transport sediment.
3. Water
a. Surface:
1) Is there any surface water body on or in the immediate vicinity of the site
(including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)?
If yes, describe the type and provide names. If appropriate, state what stream or
river it flows into.
The pump station forebay is in the historic Black River Channel which, although
deprived of the majority of its flow as a result of upstream diversions made early
in the 20th century, still receives flow from Springbrook Creek and other local
drainages. The Black River flows into the GreenlDuwamish River which flows
into Puget Sound.
2) Will the project require any work over, in, or adjacent to (within 200 feet) the
described waters? If yes, please describe and attach available plans.
Yes. The work will involve both the removal of sediment from within the pump
station structure, and dewatering in temporary containers within 200 feet of the
channel. (See attached plans.)
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3) Estimate the amount of fill and dredge material that could be placed in or
removed from surface water or wetlands and indicate the area of the site that
would be affected. Indicate the source of fill material.
The project will not place any fill.
The project will result in the removal of approximately 150 cubic yards of
sediment from within the pump station. (See attached plans.)
4) Will the proposal require surface water withdrawals or diversions? Give
general description, purpose, and approximate quantities, ifknown.
Water withdrawals will be limited to the water removed as part of the dredging
process. If permitted, a portion of the wastewater may be recycled from the
dewatering area and used as process water to allow continued sediment removal
after the existing water in the isolated pump bays has been depleted. Upon the
completion of the sediment removal work, the recycled water will also be removed
and exported from the site as wastewater. Recycling waste water and using it as
process water should save an estimated 700 cubic feet of water that would
otherwise have to be allowed to enter the work area either directly from the
forebay or imported through the domestic water supply.
5) Does the proposal lie within a lOO-year floodplain? Ifso, note location on the
site plan.
The pump station and sediment removal area are within the 100-year floodplain.
The sediment dewatering area is outside the 100-year floodplain.
6) Does the proposal involve any discharges of waste materials to surface waters?
If so, describe the type of waste and anticipated volume of discharge.
No, except as described in the response to question 3.aA above.
Ultimately all wastewater, including recycled process water, will be exported from
the work area.
b. Ground:
1) Will ground water be withdrawn, or will water be discharged to ground water?
Give general description, purpose, and approximate quantities, if known.
No. The proposal will not result in any type of groundwater withdrawals or
discharges to groundwater.
2) Describe waste material that will be discharged into the ground from septic
tanks or other sources, if any (for example: domestic sewage; industrial
containing the following chemicals ... ; agricultural; etc.). Describe the general
size of the system, the number of such systems, the number of houses to be served
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(if applicable), or the number of animals or humans the system(s) are expected to
serve.
The proposal will not result in any discharges from septic tanks or other sewage
systems.
c. Water RunofJ (including storm water):
1) Describe the source of runofJ (including storm water) and method of collection
and disposal, if any (include quantities, if known). Where will this waterflow?
Will this water flow into other waters? Ifso, describe.
As described above, water from the sediment dewatering process will be
transported off-site.
2) Could waste materials enter ground or surface waters? If so, generally describe.
Wastewater will not be allowed to re-enter the work area except within the
confines of the pump bays which will be isolated from the surrounding waters by
the concrete stop blocks. If permitted, a limited amout of wastewater may be
recycled from the dewatering area and used as process water to allow continued
sediment removal after the existing water in the pump bays has been depleted.
Upon the completion of the sediment removal work, the recycled water will also
be removed and exported from the site as wastewater. See also response to
question B.3.aA.
d. Proposed measures to reduce or control surface, ground, and runofJwater impacts, if
any:
Throughout the dredging process, water segregated by the Geotubes in the shipping
containers will be pumped into a tanker truck and transported to a wastewater
treatement facility. After the dredging ceases, water quality will be monitored as
described above until the water within the turbidity curtain area can be allowed to mix
with the other water in the forebay without exceeding state water quality standards.
If during the course of the dredging and settling period, water quality monitoring
reveals that escaping suspended solids may increase turbidity outside the turbidity
curtain to a degree that may result in state standards being exceeded, mitigation
actions will be taken. These actions will be selected from the following options:
1) Stop dredging.
2) Adjust the turbidity curtain to eliminate leaks.
3) Add a second turbidity curtain outside the first curtain to improve containment.
4) Bypass flows coming into the forebay by pumping from a point at least 100 feet
upstream of the turbidity plume to allow baseflows to continue to the Black
River channel without passing though the forebay.
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4. Plants
a.Check or underline types of vegetation found on the site:
[;8] Deciduous trees: alder, maple, aspen, other
[;8] Evergreen trees: fir, cedar, pine, other
[;8] Shrubs
[;8] Grass o Pasture o Crop or grain
[;8] Wet soil plants: cattail, buttercup, bulrush, skunk cabbage, other
[;8] Water plants: water lily, eelgrass, milfoil, other
[;8] Other types of vegetation
The proposed dewatering area is currently vegetated with grass and Himalayan
blackberry.
h. What kind and amount of vegetation will be removed or altered?
Approximately 300 square feet of Himalayan blackberry will be removed.
c. List threatened or endangered species known to be on or near the site.
None known.
d. Proposed landscaping, use of native plants, or other measures to preserve or enhance
vegetation on the site, if any:
No landscaping is proposed.
5. Animals
a. Check or underline any birds or animals that have been observed on or near the site,
or are known to be on or near the site:
B o
Birds: hawk. heron. eagle. songbirds, other
Mammals: deer, bear, elk, beaver, other
Fish: bass, salmon, trout, herring, shellfish, other
Other mammals: rodents and coyotes
b. List any threatened or endangered species known to be on or near the site.
Chinook Salmon
Steelhead Trout
Bull Trout
This site has been designated as Critical Habitat for Chinook salmon (U.S. Department
of Commerce, National Oceanographic and Atmospheric Administration (NOAA)
Fisheries, 50 CSR, Part 226, RIN 0648-AU38). While this area has been mapped as
critical habitat, Chinook salmon and Bull Trout are unlikely to inhabit this system due to
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King County Environmental _ •• ecklist Black River Pump Statio .. "edimeot Removal Pilot Project
high water temperatures, low dissolved oxygen, and chronic high turbidity. Steelhead
trout have very rarely been found upstream of the dam.
c. Is the site part of a migration route? If so, explain.
Downstream of the site, the Green River is a major salmon migration route. Chinook,
coho and steelhead trout have been observed in the Black River and Springbrook Creek.
Upstream and downstream fish migration facilities are operated seasonally at the dam.
All fish passage structures are located at the end of the dam opposite the dredging area
and should not be impacted by the sediment removal work.
d. Proposed measures to preserve or enhance wildlife, if any:
Work will be conducted as late as possible in the fledging season to minimize potential
impacts on the nearby heronry but before the fall fish migration season. Mowing of the
blackberries in the proposed dewatering area will also be delayed until right before work
begins to minimize impacts on birds that may have nested in this area.
6. Energy and Natural Resources
a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet
the completed project's energy needs? Describe whether it will be used for heating,
manufacturing, etc.
Energy needs will be limited to diesel and electricity to remove the accumulated
sediment and transport it off-site.
b. Would your project affect the potential use of solar energy by adjacent properties? If
so, generally describe.
No.
c. What kinds of energy conservation features are included in the plans of this proposal?
List other proposed measures to reduce or control energy impacts, if any:
Recycling water from the dewatering facility for use as process water within the isolated
sediment removal areas inside the dam will reduce the total amount of wastewater
produced by the project. This will result in a reduction in the amount of fuel needed to
transport wastewater off site and to treat it at a wastewater treatment facility.
7. Environmental Health
a. Are there any environmental health hazards, including exposure to toxic chemicals,
risk of fire and explosion, spill, or hazardous waste, that could occur as a result of this
proposal? If so, describe.
Lubricating oil from urban stonn runoff is known to be present in the sediments being
removed. Some of this oil could be re-released into the system if appropriate BMPs are
not employed.
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1) Describe special emergency services that might be required.
No special emergency services will be required as a result of this proposal.
2) Proposed measures to reduce or control environmental health hazards, if any: .
The purpose of this project is to reduce the risk of flood impacts to the City of
Renton and Kent by resorting full operation ()fthe pumps stations. Flooding of
urban areas can create myrid environmental health issues including the release of
toxic chemical and sewage into the environment.
During the sediment removal work, isolation ofthe work area with the concrete
stop blocks and turbidity curtain will prevent turbid water from leaving the work
area.
By removing the sediment and associated pollutants, the sediment removal project
will also prevent sediments known to be high in lubricating oil from being
transported into the Duwamish River and Elliot Bay. Maintenance of very low,
but positive flow of water from outside the work are to inside the work area,
combined with the installation of an oil absorbing ooom immediately inside the
turbidity curtain, should prevent oil that becomes separated from the sediment
from being released into the forebay.
The primary environmental health risk associated with this project will be to
workers working within the confined spaces of the darn as sediments are disturbed.
OSHA requirements for working in confined spaces will be observed to protect
workers from the associated hazards.
b. Noise:
1) What types of noise exist in the area that may affect your project (for example,
traffic, equipment, operation, other)?
The area in which the project occurs is very noisy with vehicle traffic on Monster
Road, train traffic on the adjacent railroad tracks, aircraft traffic from the King
County Airport, and industrial noise from the adjacent concrete recycling facility.
TItis ambient noise should not adversely affect the project.
2) What types and levels of noise would be created by or associated with the project
on a short"term or long-term basis (for example, traffic construction, equipment
operation, other)? Indicate what hours noise would come from the site.
Noise will be created during a 2-week period of hydraulic dredging and when
sediments are trucked off-site for disposal.
3) Proposed measures to reduce or control noise impacts, if any:
Operation of dredges and trucks will be limited to 7 a.m. to 6 p.m.
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8. Land and Shoreline Use
a. What is the current use of the site and adjacent properties?
The site is currently used as a flood control facility which includes a dam across the
Black River Channel, a pump house that sits atop the dam, a small office, three above-
ground diesel storage tanks, an asphalt storage area and a gravel parking lot. Land uses
adjacent to the pump station include open space and a road. The surrounding area
includes a railroad line, a concrete recycling facility and residential and commercial
properties.
b. Has the site been used for agriculture? If so, describe.
No.
c. Describe any structures on the site.
The pump station itself consists of a 200 x 30ft building atop the dam and pumps. Also
on-site is a small office building and three aboveground storage tanks. One holds
stormwater while two are used for diesel storage to run the pumps. There is a trash rack
with a powered rake and small conveyor system that is used to load debris into a large
dumpster.
d. Will any structures be demolished? If so, what?
No.
e. What is the current zoning classification of the site?
Current zoning is "Resource Conservation."
f What is the current comprehensive plan designation of the site?
"Employment Area -Valley."
g. If applicable, what is the current shoreline master program designation of the site?
Urban and Natural.
h. Has any part of the site been classified as an "environmentally sensitive" area? If so,
specify.
No.
i. Approximately how many people would reside or work in the completed project?
None.
j. Approximately how many people would the completed project displace?
None.
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k. Proposed measures to avoid or reduce displacement impacts, if any:
N/A.
I. Proposed measures to ensure the proposal is compatible with existing and projected
land uses and plans, if any:
This is a maintenance project and no measures are needed to ensure compatibility with
existing and projected land uses and plans.
9. Housing
a. Approximately how many units would be provided, if any? Indicate whether high-,
middle-, or low-income housing.
This proposal will not affect any housing units.
b. Approximately how many units, if any, would be eliminated? Indicate whether high-,
middle-, or low-income housing.
This proposal will not affect any housing units.
c. Proposed measures to reduce or control housing impacts, if any: .
This proposal will not affect any housing units.
10. Aesthetics
a. What is the tallest height of any proposed structure(s), not including antennas? What
is the principal exterior building maierial(s) proposed?
No buildings will be constructed as part of this project.
b. What views in the immediate vicinity would be altered or obstructed?
None.
c. Proposed measures to reduce or control aesthetic impacts, if any:
None.
11. Light and Glare
a. What type of light or glare will the proposal produce? During what time of day would
it mainly occur?
The proposal will not produce light or glare.
b. Could light or glare from the finished project be a safety hazard or interfere with
views?
No.
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c. What existing off-site sources of light or glare may affect your proposal?
The proposal will not be affected by off-site sources of light or glare.
d. Describe proposed measures to reduce or control light and glare impacts, if any.
The proposal will not produce light or glare.
12. Recreation
a. What designated and informal recreational opportunities are in the immediate
vicinity?
The Black River riparian forest supports bird watching and hiking.
b. Would the proposed project displace any existing recreational uses? Ifso, describe.
The proposal will not displace any existing recreational uses.
c. Proposed measures to reduce or control impacts on recreation, including recreation
opportunities to be provided by the project or applicant, if any:
The proposal will not adversely affect existing recreational uses.
13. Historical and Cnltural Preservation
a. Are there any places or objects listed on, or proposed for, national, state, or local
preservation registers known to be on or next to the site? If so, generally describe.
No places or objects listed on or proposed for national, state, or local preservation
registers known to be on or next to the sites affected by this proposal.
b. Generally describe any landmarks or evidence of historical, archaeological, scientific,
or cultural importance known to be on or next to the site.
The Black River is know to have been an important area to Native Americans and is
likely to contain artifacts in the surrounding areas but not in the dredging area which
will affect only very fine sediment that has been deposited inside the dam structure
since 1984. The area continues to be of cultural importance to at least one Native
American tribe.
c. Proposed measures to reduce or control impacts, if any:
With the exception of the excavation ofrecentJy accumulated sediment in the concrete
based pump station, no excavation will occur, thus eliminating the risk of disturbing
artifacts.
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14. Transportation
a. IdentifY public streets and highways serving the site and describe proposed access to
the existing street system. Show on-site plans, if any.
Monster Road SW is along the south side of the property.
b. . Is the site currently served by public transit? If not, what is the approximate distance
to the nearest transit stop?
Not applicable.
c. How many parking spaces would the completed project have? How many would the
project eliminate?
None.
d. Will the proposal require any new roads or streets, or improvements to existing roads
or streets, not including driveways? If so, generally describe {indicate whether public
or private}.
No.
e. Will the project use (or occur in the immediate vicinity oj) water; rail, or air
transportation? If so, generally describe.
Yes the project is near railway lines but will not impact their use.
f How many vehicular trips per day would be generated by the completed project? If
known, indicate when peak volumes would occur.
None.
g. Proposed measures to reduce or control transportation impacts, if any:
N/A.
15. Public Services
a. Would the project result in an increased need for public services (for example: fire
protection, police protection, health care, schools, other)? If so, generally describe.
No.
b. Proposed measures to reduce or control direct impacts on public services, if any:
The proposal will not affect the need for public services.
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16. Utilities
a. Underline utilities currently available at the site: electricity, natural gas, water,
refuse service, telephone, sanitary sewer, septic system, other.
Electricity, water, telephone, sanitary sewer.
b. Describe the utilities that are proposed for the project, the utility providing the
service, and the general construction activities on the site or in the immediate vicinity
that might be needed.
No utilities will be affected by the proposal.
C. SIGNATURE
The above answers are true and complete to the best of my knowledge. I understand that
the lead agency is relying on them to make its decision.
Signature:
Title:
Date Submitted: b-lcc,-o'6
i:\fonns\environmental checklist.doc 16 06117108
Greenhouse Gas (GHG) Emissions Worksheet
Black River Pump Station Sediment Removal Pilot Project
Note: The finished project will emit no GHGs aside form those occuring in the
enVironment by natural processes. All emissions are therefore related to construction
of the proposed project.
Distance of project site from Renton Shops. where most
daily construction-related vehicle trips will start and end: 10.18 miles
Estimated days of construction activity: 110 1
Rate Em. Coef.
(mpg or (Ibs C02el
Vehicle Milesl hours gallhr*) uel use' Fuel Type gal)
Pickup 101.8 20.7 4.9179 Gas 19.564
Pickup 101.8 20.7 4.9179 Gas 19.564
Rail transport 65053 ton-miles 762.0 85.371 Biodiesel 4.737
Vactor 70 6.3 441 Biodiesel 4.737
Heavy Egui(! Trans(!ort 45 1.9 23.684 Biodiesel 4.737
TOTAL:
Emissions
(Ibs CO,e)
96.21
96.21
404.40
2089.02
112.19
2798.04
Tons
CO,e
0.0481
0.0481
0.2022·
1.0445
0.0561
1.3990
.struJ.. , , ,
VlCNTYIW'
HlEX
DESCRIPTION
COYER SHEEr
PlAN ~EW
CROSS SECTION A-1t
~-I -~ I Im~'. =:--U _ 1.IJ:=_Si:~ ~,~
w
KJngCounty
Department of Natural Resources and Parks
Water and land. Resources DIvlsIon
Flood Huard Reduction So ...... _on
PM! BI..onnea., 0INd0r
DepartnenI of NWnd R.o!Jna II'Id Parka
BLACK RIVER PUMP STATION
SEDIMENT REMOVAL
PHASE 1
CAU. 2 WORKfIIQ DAYS
IlEFOAE YOU IlIQ
1-tOO-404-OI505 (l,II_'JfIJf'tI.l)eA1lOH!l __ J.)
~ KIng County a..--d' ____ _
V¥ __ ~_~
_" ___ ~LIoI. ___ c.-
8l.ACK FIYet fILMI SfA"nON
SI!CIoENT """"'AI.
I'IWEI
"""" ......
SHErr
1
" 3
SKEETS
Existin
Shed
111111v,..=.~·
xisting ASphalt
taging Area
Pump
Station
IOfficel
/'
---+-Proposed Temporary
Silt Curtain
Existing
Trash Rack
Apron
~-I -~ I I~n =:--U _ 1.1 J=~"7i: ~ ~~
I
I I I I 'I 2iI I :I(l 0/1 I)
seAl( III fUr
Black River
Direction of Flow
--+-------:::::::::::=-=:=:=:::=-=
CALL 2 WOAKJNQ DAYS
BEFORE YOU CIQ
~
(I.OIIIOIQOICMO\lU.ft'l'~MI;_.)
ta lOng County
~ ............... -BlACK IWEII PUMP STA1lON
SI!IlIIENr IBtOYAL
SHE[<
2
OF ._-.... ----......----'"' ---PHASE 1 ..... -3
.!!!!!r!.
f'l[LIlIlOOl<, --.....,
Oott><ca-.
Overhead Crane
Removable
Floor Plates
Overhead Crane
_'7~I~I~~~~=;~~~===== Trash~ ! \ ( I',
Rack ~ I J ~
' i ! , Flow" ;
Stop Log
Slot
f-_-,-M",i",n. 1,!p~ream Wa~r !evel EL 0::'0'_ Zone 1
~~'t5;P:;'W
.-~I-
Concrete
Apron
Temporary Silt
Curtain
~ U IfLO. 1110 10". ------I
~..1O ... ~Q(lI< !·lOO8
PftO.J£CT til>., ::::::":'''':''':'=:::: Sll~ No._ -
_OOlWO-.I.Ieo\.OUIJ,II HOO' I ~~~tcW1l~~
Pump
Sediment
Concrete
Apron
II.. 1\ J 0 ,e'
$CAU iN fit'
CALL 2 WORKING DAYS
BEFORE YOU DIQ
1-800-424-55515
(_t.lG'IOU"~""""","""1\DI<S .... £ ...... 0 •. )
SHEET
w~~r __ ~~ E:'I..AQ( AVER Plf"P STATION
""""""" FEMOVAL
3
" I'IWEt W_ ..... l ... _~ _ ..... ,""""" ... ""_ ............. , 3 --... -(;1Il1085 eecnof<I A-A SHEETS
VICINITY MAP
1
INDEX
SHEET DESCRIPTION
1 COVER SHEET
2 PlAN VIEW
:3 CROSS SECTION A-A
4 NEIGHBORHOOO MAP
""""""'" xx I FED. AID No.
PROJECT JOHN KOON ..... AGEl< 1620081
PROJECT No.
DESIGNED: I SURVEY No.
_., '" """'" I BY I DATE
• OESXOH EN~1k UCA OUlAN I 6 20081 MAINTENANCE DNiSfON No.
RELO 8OO:~'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ,t-.
SU!MY BASE _,
CHro<EI),
FlDl04
t;
King County
Department of Natural Resources and Parks
Water and Land Resources Division
Flood Hazard Reduction Services Section
Pam Bissonnette, Diraclor
Department of Natural Resources and Parks
BLACK RIVER PUMP STATION
SEDIMENT REMOVAL
PHASE 1
<!)
-'
~ ....,
CALL 2 WORKING DAYS
BEFORE YOU DIG
1-800-424-5555
(UNDERGROUND UTIurv lOCATIONS ME APPROX.)
tQ King County
o.p.trnent of NIIhnI ReeoIReIa .-.d P-'a
Water and Land Resoun::es Division
RIwr IIIId FIoodpI:IIn ............ UnI ----
BLACK RIVER PUMP STATlON
SEDIMENT REMOVAL
PHASE 1
COYERstEEl'
SHEET
1
OF
4
SHEETS
SIJR\fE't EWIE ~ -
Existing Asphalt
Staging Area
Existing -----
Fence
Existing
Shed
/r
j "" , 1
Pump
Station
Proposed
Temporary
Dewatering Tanks
/~//"11 /
-.~-8-· --
Proposed
Dredging Area
Proposed Temporary
Silt Curtain
Existing
Trash Rack
________ Concrete
Apron
(p
:.:.
~
L.;
O.H.W.M.
Black River
Direction of Flow
Office~PfJ ----w....-------~/ ~ ----............. -.-~ ----=::::::: ~-==--~---------~-------~ ---------
..... RE\/ISION
Ir i
Parking
Lot
----18 -------==-----:-..:=== --l8 l ~ ---=;~~-==-~
~/~~~ ~ I ./
e,l>
~ --------/\
N'PRCMD: XX I FED. AID No. --------1
...1 ....
== JOHN KOON 6-2008 ......... I IPRO.IECT No, FW1",
SURVEY No, --------J
8-2008 ~"!t5N~~ 1DIGIN!NlERED: LICA DU~
tQ King County
DepnnenI 01 NIiIInI Reeawoee and p..u
Watef and Land Resources I:lIIisIoo
Rlvwand ~ ..... , ..... UnIt
Pam P' ..... Dhdr:r
CALl. 2 WOI'tKNl DAYS
BEl Of£ YOU CD
~
(UNOERGROUNO UTIU1Y LOCA11ONS NI.£ APPROX.)
BLACK RIVER PUMP STATION
SfD'ENT REMOVAL
SHEET
2
Of"
PHASE 1 3
I'LANW!W SHEETS
f--_-=-=M-"-in:..:.;:. IJpstream Water !,evel EI. 0'-0'_
Overhead Crane
Trash
Rack
Removable
Floor Plates
Flow --
cb
-+
Stop Log
Slot
Zone 1
Concrete
Apron
Temporary Silt
Curtain
........ III' I !WE
FE1D """"'~;' ~~~~~t~~~;jiiiiiiiiii~iri~-xx
............. FEll. AID No. _____ -I
......" .... _ ~ JOHN "CON 6-2008
_ ........ PROJECT No. FW'04
SURVEY No. -------1
NUll. DESIGN DfID£D: l.JCA OULAN 6-2008 MAiNTENANCE DMSlON No.
Overhead Crane
Pump
,',
Sediment
W King County
DIf*In'IeI'd of NatlnI ReIcuR:M and Parb
Water and Land Resources IJMsIon
RMrMCI FIaocIpWn ............ UnI
Pam " wMIItB. Dhdar
Concrete
Apron
@
-,
CAU. 2 WORKNl DAYS
BEl CAE YOU OIQ
~
(UNO£RGROUNO UTIlIJ'r' l.OCA11ONS ARE APPROX.)
SHEET
BLAC< RIY8l PlM' STATION
SEDlIENI' IBAOYAL 3
OF
PHASE 1 4
CROB8 8ECJION A-A SHEETS
~
~
(
~
////
/,/
//////
PROJECT
OCATION
. ----
S 143RD ST
--, ,
SUBJECT PARCEL
(377920090)
--~~ \ BLACK RIVER ..
I
/
/1
'-.....,.
-'~':>...-
) \ \ ,
~
//
/ ~ /
• I. '> " . \
////
, \.
/
~.-\
(f)
~ ---
'm
~-
fT\
~l
: ~".
... J
CALL 2 WORKING DAYS
BEFORE YOU DIG
1-800-424-5555
(UNDERGROUND UllUlY lOCATIONS ARE APPR<»:.)
SHEET
st.<MI'EI>. . FED. AJD No.
PRQ.JECT
SURVEY eASE ~ WANAGER; JOHN KOON 6 2008
AaD 9OC*:~'",;:::::::::::::1I:::::::::1l"'.1:=:=:=:=-:-: __ :=:=:=:=:=J!:=1!:=:=1~ xx I
tQ King County
DepnnenfofNllhnl ~ and Parb
Water and land Rosourt:es I:msion RIWr_ RoodptIIn ........... UrdI
BLACK RIVER PUMP STATION
SEDIMENT REMOVAL 4
OF
CHECKED: DESIGNED:. PROJECT No. FLD104
SU~ No. -------1
NUM. REVISION DESIGN DllERED: UCA DUlAN 6 200B MAINTENANCE 6V I»lTE DIVISION No.
PHASE 1
III3CHIORHOOD MAP ----4
SHEETS