HomeMy WebLinkAboutPermit L96-0043 - KING COUNTY / SURFACE WATER MANAGEMENT - TUKWILA 205 LEVEE SHORELINE EXEMPTIONL96 -0043
TUKWILA 205 PROJECT
SHORELINE
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July 24, 1996
City of Tukwila John W. Rants, Mayor
Department of Community Development Steve Lancaster, Director
Dave Clark
River Management Section
King County.Surface Water Management
700 Fifth Avenue, Suite 2200
Seattle, WA 98104
RE: NOTICE OF EXEMPTION
for Proposed 1996 Levee Repairs (File No. L96 -0043)
Dear Mr. Clark:
We have reviewed the proposed" riverbank . repairs for the Tukwila 205 project and we
concur the project meets the criteria for shoreline permit exemption based on normal
repair and maintenance (WAC173- 14- 040(b)), and complies with the Shoreline
Management Act and local shoreline master program policies (WAC 173 -14- 040(1)(3)).
Project Name: Tukwila 205 Levee Repair Project.
Applicant: King County Surface Water Management Division
Project Location: Green River - Between S. 180th Street and Southern City Boundary.
Lower Green River Federally Authorized Levee Job No: GRE -2 -96
The project involves the excavation /regrading of slumping riverbank areas and
reconstruction of the banks. Riverbank repair will occur at four locations along the Green
River south of S. 180th Street and north of the southern city boundaries. All work will be
conducted on the left bank.
Restoration includes regrading the slumping bank to a 1.5:1 slope with a filter blanket on
the bank and installing a toe buttress with large woody debris for fish habitat. The
embankment will be reconstructed with live geogrid layers containing willow and dogwood
cuttings.
6300 Southcenter Boulevard, Suite #100 • Tukwila, Washington 98188 • (206) 431-3670 • Fax (206) 431-3665
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Removal of trees within the shoreline zone is subject to a tree permit from the City of
Tukwila. If the project is going to result in the removal of any trees, you must first obtain
the permit through the Department of Community Development.
If you have any questions, please call John Jimerson at 431 -3663.
Sincerely,
Steve Lancaster
DCD Director
cc: File
Phil Fraser, Public Works
Alice Kelly, DOE
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King County
Surface Water Management Division
Department ofNatural Resources
700 5th Avenue Suite 2200
Seattle, WA 98104
(206) 296 -6519
(206) 296 -0192 FAX
July 11, 1996
Steve Lancaster, Director
Department of Community Development
City of Tukwila
6300 Southcenter Boulevard, Suite #100
Tukwila, WA 98188
RE: Maintenance Exemption for Tukwila 205 Project
Dear Mr. Lancaster:
The purpose of this letter is to request confirmation that repairs scheduled this summer to work
the Tukwila 205 project are exempt from formal issuance of a City of Tukwila Shoreline
Substantial Development permit and SEPA determination.
My interpretation is that the proposed repair work is exempt from shorelines substantial
development permit requirements pursuant to WAC 173- 14- 040(b). Repair activities at the site
will be carried out by the U.S. Army Corps of Engineers (Corps) under their Section 205
project authority. A map and copy of the proposed plans for the project are attached for your
reference. The Green River Flood Control Zone District (GRFCZD) is the local sponsor for
this work, which will be constructed under a valid SEPA declaration in accordance with WAC
197 -11 -926. The GRFCZD, as local sponsor, is required to demonstrate compliance with all
local permitting requirements.
As noted in the Corps' plan package, this project involves repairs to four sections of the levee
within the City of Tukwila, on the left bank of the Green River from river mile 16.2 to 13.. The
3 proposed includes removing unstable side slope material and resloping the bank as necessary
to produce a 1.5 :1 slope ratio. A filter blanket will be installed on the bank and woody debris
structures will be installed under the toe to deflect flows and provide fish habitat. Live
vegetation will be planted on the slopes of the levee. All installation of vegetation is considered
"betterments" by the Corps and will be supported at 100 percent local (GRFCZD) cost. The
total cost for the project is anticipated at $427,000.
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Steve Lancaster
July 11, 1996
Page 2
The GRFCZD has already received verbal approval of an Hydraulic Project Approval from the
State Department of Fisheries for this project.
Please contact City of Tukwila Public Works Director Ross Earnst or Senior Engineer Phil
Fraser if you have any questions about this important flood repair work. I can also be reached
at 296 -8388. Thank you in advance for your assistance.
Sincerely,
Dave Clark
Manager, River Management Section
DC:SL:acJ14
Enclosures
cc: Ross Earnst, Public Works Director, City of Tukwila
ATTN: Phil Fraser, Senior Engineer, City of Tukwila
Andy Levesque, Senior Engineer, Green River Basin Program
Stephanie Lucash, Program Coordinator, Green River Basin Program
NE►LV TO
ATTENTION OF
Planning Branch
DEPARTMENT OF THE ARMY
SEATTLE DISTRICT. CORPS OF ENGINEERS
P.O. BOX 3755
SEATTLE, WASHINGTON 98124-2255
,tune 25, 1996
Andy Levesque
King County Surface Water Management.
700 Fifth Avenue Suite 2200
Seattle, WA 98104
Dear Andy:
Enclosed is the revised version of the technical memo for the Lower Green River
Federally Authorized Levee PL -84 -99 project. This memo reflects the change in project
cost sharing that we discussed in our 24 June phone conversation. I did not submit the
enclosures that accompanied the original memo in that the originals are still current.
If you have any questions, please contact me at 764 - 6959.
Sincerely,
Bruce Sexauer
Project Manager
Enclosure
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TOTAL OuANT T ES FOR SECTION A
MATERIAL
OUANT1 TY
EXCAVATION a RESLOPE
CU.4RRY SPALL
GRANULAR FILL
GRAVEL FILTER
CLASS IV RIPPAP
TOPS011
1700 C .Y
350 C .Y
1300 C .Y .
300 C .Y .
770 C .
300 C .Y .
TOTAL GUANT I TIES FOR SECT I ONS 6. C, D
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WEIGHTED TOE
CLASS,Iv RIPRAP
LARGE WOODY DEBR 1 S
12 ' - 5' LENGTH
- 2' TRUNK DIAMETER
PLACED 50' INTERVALS
9'
15'
MAX .
TYPICAL SECTION
SECTIONS 6, C, D
NOT TO SCALE
EXCAVA T I ON
QUARRY SPALL
CL ASS Iv RIPRAP
SECTION LENGTHS
SECTION A = 200 LF
SECTION 2 = 100 LF
SECTION C = 950 LF
SECTION 0 = 700 LE
2600 C .Y
1300 C .Y .
6790 C .Y
CLASS IV RIPRAP GRADATION
PERCENT STONE 'WEIGHT,
BY WEIGHT LBS•
90% 200 - 1000
50% 400 - 1000
30% 550 - 1000
0% 25 - 200
NOTE:
• I. = ESTIMATED WATER SURFACE AT TIME
2. WILLOW SHOOTS WILL BE PLACED BETWEEN TH
PER PL84-99 REGULATION, WILLOWS WITH BASI
> 2" WILL BE THINNED AND/OR REMOVED AS
+I 0' LEVEE MAINTENANCE. WORK WILL BE DONE BY
3. MAXIMUM OF 4 WOODY DEBRIS STRUCTURES. F(
MAXIMUM OF 3 W000Y DEBRIS STURCTURES Fi
MAXIMUM OF 20 W000Y DEBRIS STRUCTURES 1
MAXIMUM OF 15 WOODY DEBRIS STRUCTURES F
DATE itiO TIME PLOT TED: OG•MA f -199
' DESIGN FILE, 11.00e3Ignsoml3c4clvolpIS
IC
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TOTAL QUANTITIES FOR SECTION A
MATER I AL
OUANTITY
EXCAVATION & RESLOPE
CUARRY SPALL
:3R4NULAR FILL
GRAVEL FILTER
CLASS IV RIPPAP
TOPSOIL
1700 C.Y.
350 C.Y.
I300 C.Y.
300 C.Y.
770 C Y.
300 C .'f .
TOTAL QUANi'ITIES FOR SECTIONS B. C, D
mATERIAL OUANT ! TY
EXCAVATION
QUARRY SPALL
C! ASS I V R I PRAP
SECTION LENGTHS
SECT I ON A = 200 LF
SEC TIloll a 2 I00 LF
SECT I ON C = 950 LF
SECTION 0 = 700 I_F
2600 C .Y .
I300 C.Y.
6.790 C .Y •
CLASS I t/ R I PRAP GRAD.AT I ON
PERCENT STONE WE I GHT ,
BY WE I GHT LBS
90% 200 - 1000
50 400 - 1000
30% 550 - 1000
i r ;% 25 - 200
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NOTE:
• I. N.H.W. = ESTIMATED WATER SURFACE AT TIME OF CONSTRUCTION.
2. WILLOW SHOOTS WILL BE PLACED BETWEEN THE 2.5' LIFTS.
PER PL84 -99 REGULATION, WILLOWS WITH BASE DIAMETERS
i 2" WILL BE THINNED AND/OR REMOVED AS A PART OF
+1 0 ' LEVEE MAINTENANCE. WORK WILL BE DONE BY OTHERS.
3. MAXIMUM OF 4 WOODY DEBRIS STRUCTURES FOR SECTION 'A'
MAXIMUM OF 3 WOODY DEBRIS STURCTURES FOR SECTION 'B'
MAXIMUM OF 20 WOODY DEBRIS STRUCTURES FOR SECTION 'C'
MAXIMUM OF 15 WOODY DEBRIS STRUCTURES FOR SECTION 'D'
DATE ANO DATE PLOTTED: O6 -MAE -1996 12:S3
OESICN FILET IVOeslOnsbnlaoAcIvAp199Ap199 .pre2.0On
LOCATION MAP
AT TO SCALE
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REDUCED TO S0Z OF LULL SIZE
U.S ARMY ENGNEER DISTIUCT, SEATTLE
CORPS Of ENGINEERS
RATTLE. WA93+OTCN
GREEN RIVER
1998 FLOOD DAMAGE REPAIR
GRE -2-96
LEVEE REHABILITATION
SEGALE LEVEE
NEAR TUKWILA
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CENPS- EN -PL -CP
MEMORANDUM FOR Commander, North Pacific Division, ATTN: CENPD -ET -OE
SUBJECT: Green River, Washington, King County, Public Law 84 -99,
Levee Restoration, Lower Green River Federally Authorized Levee, Job No. GRE -2 -96
1. LOCATION.
The levee is located on the left bank of the Green River from RM 16.2 to RM 13.3, King
County, State of Washington. Enclosure 1 provides a location and vicinity maps, and a typical
cross - sections and estimated quantities for the proposed repair.
2. OWNER.
This Federal levee is operated and maintained by the City of Tukwila with the assistance
of King County Surface Water Management, King County, Washington.
.3. SPONSORS.
City of Tukwila has requested assistance in repairing the damaged levee sections on the
Green River within King County, see enclosure 2. The City of Tukwila will act as the local
sponsor. The local sponsor entered into an agreement on January 31,•1991 for the project. The
existing terms and conditions of the January 21, 1991 agreement apply to the proposed
rehabilitation work. The local sponsor will provide written acknowledgement of their continued
obligation of providing the usual items of local cooperation. Before construction begins, the City
of Tukwila will provide to the Government for acceptance all documentation needed to
demonstrate it owns all lands, easement and right -of -way, including suitable borrow sources and
dredged or excavated material disposal are, necessary for construction, operation and
maintenance of the levee system.
4. POINT OF CONTACT FOR SPONSOR.
Ross Earnst, Director of Public Works
City of Tukwila
telephone (206) 433 -0179
5. PROJECT CLASSIFICATION.
This is a Federally Authorized levee designed for flood control to provide protection from
periodic, recurring floods.
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6. DESIGN DATA OF PROJECT.
The levee extends from RM 16.2 to RM 13.3 along the left bank of the Green River. The
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and the downstream end ties into the upstream face of Interstate 405. The levee structure
consists of silty sandy gravel with riprap bank protection on the riverward slope of the levee at
areas of potential erosion. Prior to the flood damage, the levee provided a 500 year event level of
protection.
7. PREVIOUS PL -84 -99 ASSISTANCE.
The last Federal participation in repairs on this levee system was in 1990. The levee
slope was damaged for about 700 feet at RM 15.5. The repairs consisted of a weighted toe and
bank protection up to ordinary high water and topsoil above high water.
8. MAINTENANCE.
This levee section, the Lower Green River Federally Authorized Levee, is active in the
District's PL -84 -99 continuing eligibility inspection inventory, and is sufficiently maintained.
The City of Tukwila has expended an average of $1 5,000 per year on maintenance.
9. DISASTER INCIDENTS.
a. Job No. GRE -2 -95 involves repair of the levee that was damaged during the 8
February 1996 flood event. In early February 1996 14.62 inches of rain over a 96 hour period at
Howard Hanson Dam. The combination of the heavy rains and a rise in the freezing level to
above 8000 feet produced high water on the Green River for about 10 days. The magnitude of
the peak, occurring the afternoon of 8 February, was 12,400 cubic feet per second (cfs) as
measured at the USGS recording gage near Auburn, Washington. The estimated recurrence
interval of approximately 75- years. Average channel velocities at flood discharge through the
river reach covered by this report are estimated to be less than 5 feet per second. Some portions
of the damaged sections are located on the outsides of river bends, thus will have localized higher
velocities.
b. Situation Reports No. 1 through 23 for Western Washington were submitted to CENPD -CO -E
during the period of 5 February to 27 February 1996.
10. DAMAGE DESCRIPTION.
Four sections of the Lower Green River Federally Authorized levee were damaged during
the flood.
Section A. Levee saturation during the period of high flows caused a 200 foot section of
the levee embankment to slough as the river receded. The damaged levee section is at
approximate RM 14.5, see the section A photo in enclosure three.
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CENPS- EN -PL -CP
Green River, Washington, King County, Public Law 84 -99,
Levee Restoration, Lower Green River Federally Authorized Levee, Job No. GRE -2 -96
Section B. At RM 15, 100 feet of toe scour resulting from a combination of levee
saturation and high flows. There are no photos of this section, though the damage is similar to
mat shown by we section L. plwtos in enclosure three.
Section C. At RM 15.1 to 15.3, 950 feet of toe scour resulting from a combination of
levee saturation and high flows. The section C photos in enclosure three show damage typical to
this section. •
Section D. At RM 16, 700 ft of toe scour and areas of over - burden slump, resulting from
a combination of levee saturation and high flows. The section D photo in enclosure three shows
damage typical to this section.
11. PROPOSED WORK. This project will repair the Lower Green River Federally Authorized
levee to its pre -flood condition.
a. Repair to the Lower Green River Federally Authorized Section A levee will
consist of removing unstable side slope and reslping the bank as necessary to produce
a 1.5 foot horizontal (H) on 1 foot vertical (V) side slope. The county will provide a
suitable disposal site. A 1 foot thick filter will be placed on the resloped.bank. The
filter will consist of spalls below the water surface and gravels above. The levee will
have a weighted toe 9 feet long by 6 feet thick of class IV riprap. The toe will be
partially buried in the slope, with about six feet of width extending into the river. .
Woody debris structures consisting of individual tree trunks with root wad attached will
be.placed'under the toe spaced at about 50 foot, extending into the river no More than 5
feet, pointing upstream at an angle of 30 degrees from perpendicular to the toe. These
will act as flow deflectors and will provide fish habitat. The woody debris will be a root
wad and trunk. The trunk will be 12 to 15 feet long such that it can be sufficiently
anchored under the toe. Slope will be protected with a 30 inch thick blanket of class IV
riprap; extending from the top of the toe to a level of three feet above normal high
water. From the top of the bank protection three 2.5 foot lifts of granular fill will be
placed, each lift will be secured by a coir fabric /burlap wrap as shown on enclosure one.
Willow shoots will be placed between each lift. The coir fabric will serve to secure the
slope until the willow roots are established. Any willow that exceeds 2 inch diameter at
the base, will be thinned and removed as part of the annual maintenance. From the top
of the riprap bank protection to the top of the coir fabric/burlap wrap, approximately 40
feet, one foot gravel filter and one foot of topsoil will be placed. The coir fabric /burlap
mat will be placed on top of the topsoil, held in place with 24" survey spikes placed on
3 foot centers. The slope will be seeded for grass.
The addition of bio- engineering elements (woody debris, fabric and willows) for this
project is supported fully by the District, King County, Washington Department of Fish
and Wildlife, US Department of Fish and Wildlife. This design meets the requirements
of the PL 84 -99 for restoring flood protection to a damaged levee to pre -flood
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CENPS- EN -PL -CP
Green River, Washington, King County, Public Law 84 -99,
Levee Restoration, Lower Green River Federally Authorized Levee, Job No. GRE -2 -96
conditions. This design is also consistent with previously performed maintenance by
King County and the goals of the Green/Duwamish Ecosystem Restoration Study
euiieutiy uiiuei'\ uutiiurizeut uy rile Civii 1\ urks Lcosystem 1<cstuiutiwn Program,
reference EC 1105 -2 -210. Enclosure 4 shows photos of three sections of levee
rehabilitated using a similar design. In each example, King County has successfully
used bio- engineering to perform maintenance repairs.
King County is a strong proponent of bio - engineering techniques to provide protection
and yet be environmentally responsive.. The District has inspected previous County
bio- engineering projects and has found them successful. The bio- engineering items are
identified as such in the cost estimate.
Repair to Lower Green River Federally Authorized Levee section B, C and D will consist of
removing damaged toe and bank as necessary for placement of new toe. The levee will have a
weighted toe 9. feet long by .6 feet thick of Class IV riprap. A 30" layer of Class IV riprap will
be•placed to three feet above the normal high water. The damaged toe will be excavated and the
new toe placed such that the new toe does not exceed its original footprint.. Woody debris will
be placed under the toe, extending into the river no more than 5 feet, pointing upstream at an
angle of 30 degrees from perpendicular to the toe. These will act as flow deflectors and will
provide fish habitat. The woody debris will be a root wad and trunk. The trunks will be 12 to 15
feet long such that they can be sufficiently anchored under the toe. Willow shoots will be place
in areas of toe repair.that extend into the levee bank above ordinary high water. The willow
shoots will be placed between the toe repair and the levee slope, on three foot centers.
This type of design will result in increased hydraulic rougness. Criteria by which to accurately
quantify the increased roughness does not exist. However, judgemental estimates of the potential
range of roughness coefficients made for a similar repair along this levee in 1995 resulted in
computed increases in the design condition water surface elevaiton of 0.3 to 0.5 ft along, and just
upstream from, the federal project. Computations indicate that the affect of increased water
surface elevations at the project extend as far upstream as the city of Kent, about 6 miles
upstream from the project. The City of Tukwila, the local sposor of this project, has
acknowledged, and accepts, this loss of conveyance and loss of flood carrying capacity as an
acceptable trade -off to the environmental enhancement provided by this design concept..
All willows and woody debris are considered betterments and are being paid 100% by
the local sponsor.
b. In -water construction is curtailed on the Green River between 15 March and
15 June for salmonid fish runs. The following schedule will permit construction in a
timely manner and prior to the fall flood season. Plans and specifications will be
initiated following project approval. Assuming project approval.and receipt of funds by
31 May, 1996, the following schedule can be met:
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CENPS- EN -PL -CP
Green River, Washington, King County, Public Law 84 -99,
Levee Restoration, Lower Green River Federally Authorized Levee, Job No. GRE -2 -96
Complete plans and Specifications
Award rental equipment contract(s)
i3egi i conslr uelion
14 June 1996
7 July 1996
i9tiu
c. Benefits attributable to the proposed levee repair work are calculated based on the
difference in probabilities associated with the levels of protection provided by the levee in the
pre -flood condition 'compared to the post -flood condition. Prior to the flood, the levee provided
protection from floods with a 500 year recurrence interval. The post -flood level of protection is
estimated to be a 50 -year recurrence interval. The economic analysis was based on field work
done in 1988 for the Tukwila Section 205 Feasibility Flood Damage Reduction Study, that
covered the identical area. During the 1988 study, a 100 percent inventory of the flood plain was
conducted. Business enterprises were interviewed to develop individual depth vs. damage
relationships for the contents of each structure. Standard depth vs. damage curves were used for
each structure depending on size and type of material used for construction. This information
was updated for price level for use in this analysis.
d. The property protected by this levee consists of 570 acres of commercial and industrial
land that includes retail, wholesale and manufacturing concerns. This area contains 123
structures that house approximately 365 commercial enterprises, 11 industrial firms, 3 public
offices, and about 7 miles of roads and streets. The total value of damageable property was
estimated to be $500,000,000 in 1988.
e. With repair, the levee will be restored to a 500 year level of protection. In accordance
with ER500 -1 -1, the applicable period of analysis shall be the lesser of the degree of protection
afforded by the project, or 50 years. Annual benefits and costs are therefore based on an
economic life of 50 years and the current discount rate of 7.625 percent.
Average Annual Benefits (April 1996 Prices):
Commercial /Industrial /Public $348,000
First Cost (April 1996 Prices): $436,000
Annual Cost:
Interest and Amortization (50 yrs, @ 7 5/8 %) $34,100
Operation and Maintenance $15,000
Total Annual Cost $49,100
Benefit -to -Cost Ratio
-5-
7.1 to 1.0
CENPS- EN -PL -CP
Green River, Washington, King County, Public Law 84 -99,
Levee Restoration, Lower Green River Federally Authorized Levee, Job No. GRE -2 -96
The following check was performed:
(1) Total Value of Property Protected:
Commercial /Industrial
Public
Total
(2) Value of Cropland: Not Applicable
(3) Net Farm Income: Not Applicable
$ 500,000,000
Not Estimated
$ 500,000,000
Distribution of Project Benefits: There are hundreds of property owners in the protected area.
No individual receives more than 25 percent of project benefits.
12. COST ESTIMATE.. Estimated Cost (Price Level April 19961
(1) Construction Cost: (1950 feet)
Equipment Mob and Demob,
Excavation,
Gravel Filter
Granular Fill
Spalls
Riprap IV
Topsoil
Burlap Mat and Staking
Large Woody Debris
(betterment paid 100% by local
Willow Shoots
(betterment paid 100% by local
1 job L.S.
4300 cy at $ 12.00
300 cy at $11.00
1300 cy at $ 10.00
1650 cy at $29.00
7510 cy at $27.00
300 cy at $20.00
1000 sy at $2.00
42 ea. at $750
sponsor)
2500 ea at $0.80
sponsor)
Subtotal
Supervision and Inspection, (8 %)
Contingency, (10 %)
TOTAL CONSTRUCTION COST
-6-
$ 4,000
$ 51,600
$ 3,300
$ 13,000
$ 47,850
$ 202,770
$ 6,000
$ 2,000
$ 31,500
$ 2,000
$ $364,020
• $ 26,540
$ 36,440
$427,000
CENPS- EN -PL -CP
Green River, Washington, King County, Public Law 84 -99,
Levee Restoration, Lower Green River Federally Authorized Levee, Job No. GRE -2 -96
(2) Engineering and Design (Federal):
Plans and SpeL:illeaiioiis
(3) TOTAL PROJECT COST
(4) COST DISTRIBUTION
TOTAL FEDERAL COST
Total Project Cost - Betterments
TOTAL LOCAL COST
Betterments
$ 9,000
S 436,000
$ 402,500
.$ 33,500
13. STATEMENTS.
In accordance with ER 200 -2 -2, Procedures for Implementing NEPA,paragraph 8,
Emergency Actions, the environmental effects of the proposed levee rehabilitation have been
considered during the planning process. An environmental assessment (EA) will be prepared to
evaluate probable impacts of the project on the existing environment. Factors addressed by the
evaluation include public safety, water quality, wetlands, threatened and endangered species,
noise, economics, fish, and wildlife. An environmental assessment and Finding of No
Significant Impact (FONSI) will be completed, coordinated with applicable Federal and State
resource agencies and placed in the study file.
a. Water Quality. Construction windows for in stream construction due to fish
migration are being observed. Materials for construction will be obtained from an
established borrow pit and rock quarry. No contaminants are known or suspected to be
present in the construction materials. .
b. Fish and Wildlife. Construction will not directly affect any aquatic or
terrestrial fauna. Excavation, transportation, and placement of embankment materials
will require the use of heavy construction equipment whose presence and noise may
temporarily displace some species at both the borrow pit and construction sites. No
adverse impacts from excavation or removal of construction material are expected.
Threatened or endangered species.such as the bald eagle and American peregrine falcon
may transit the project area but are not expected to be affected as a result of the
proposed action.
c. Wetlands. The project area does not contain wetlands as defined by the
Corps of Engineers.
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CENPS- EN -PL -CP
Green River, Washington, King County, Public Law 84 -99,
Levee Restoration, Lower Green River Federally Authorized Levee, Job No. GRE -2 -96
d. Cultural Resources. No significant cultural resources are anticipated in the
project area due to the disturbed nature of the project area (compacted earth levee).
e. Recreation. The certain areas of levee have paved jogging paths on the levee
crest. Temporary blockage of these paths will occur during construction.
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f. The proposed work is being informally coordinated throughout the planning,.design, . �'
and construction phases with the following agencies. Their recommendations will be considered _1 c0,
and implemented as appropriate. , 'N o,
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(1) U.S. Fish and Wildlife. a LL
(2) Environmental Protection Agency . w 0
(3) Washington State Department of Fisheries and Wildlife _
(4) Washington State Department of Ecology a J'
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(5) Muckleshoot Indian Tribe 21 d
(6) Natural Resource Conservation Service 17 _:
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14. PERMITS. •z E
uj The District Commander has determined that the rehabilitation work is exempt in 2 �i
accordance with.33 CFR 323.4, emergency reconstruction of a recently damaged levee. 0 N
15. REQUEST FOR AUTHORITY. WORK ALLOWANCE. AND FUNDS. = vi
The damaged flood control levee at Tukwila, King County, Washington, qualify for ;u. 0,
repair under Public Law 84 -99. Unless these repairs are made, the next high water event could z
further damage the levee, possibly resulting in levee failure with resultant wide- spread flooding. w.I1
F=F.
Repair of the levee is recommended as described above. Authorization of the repairs and an p
allotment of $402,500 for this work is requested. Construction will be contingent upon the local z
sponsor furnishing the necessary items of local cooperation. There is no CWIS number for this
project.
FOR THE COMMANDER:
4 Encl.
as
Brian R. Applebury, P.E.
Chief, Operations Division
-8-
DEPARTMENT OF THE ARMY
SEATTLE DISTRICT. CORPS OF ENGINEERS
P.O. BOX 3755
SEATTLE, WASHINGTON 98124-2255
/IDLY TO
ATTENTION OF
Emergency Management Branch JUL 2 3 1996
Ross Earnst, Director
Public Works Department
City of Tukwila
6200 Southcenter Boulevard
Tukwila, Washington 98188
Dear Mr. Earnst:
RECEIVED
JUL 2 41996
uKW1LA
PUBLIC WORKS
Thank you for your letter of May 6, 1996, requesting assistance in repairing the
damaged Lower Green River federally authorized levee. The damaged sections of levee
are on the left bank of the Green River from River Mile 16.2 to 13.3. Enclosure 1 is a
location and vicinity map, with typical cross - sections for the proposed repairs.
Construction costs are 100% federal for the repair of this Federal project
designated as Job No. GRE -2 -96. The terms and conditions of the January 31, 1991,
Agreement (Enclosure 2) between the Department of the Army and the City of Tukwila
apply to the proposed construction work. Listed below are three of the basic
provisions to the Agreement known as the A- B -C's:
a. The City shall provide all the lands, easements and rights -of -way,
including suitable borrow and dredged material disposal areas, and perform all
relocations (excluding railroad bridges and approaches thereto) determined by the
Government to be necessary for construction of the project.
b. The City shall hold and save the Federal Government free from all
damages arising from the construction, operation, and maintenance of the Project.
c. The City shall operate, maintain, repair, replace, and rehabilitate the
completed Project, or functional portion of the Project, in accordance with regulations
or directions prescribed by the Government. For more specific information on
operation and maintenance see the O &M Manual of May 1992.
Please acknowledge your continued obligation of providing the A -B -C's
presented by having the County Commissioners sign in the spaces below. Please
return one of the original signed copies in the envelope provided by July 30, 1996, or
sooner.
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