HomeMy WebLinkAboutSite Evaluation for Lilliwaup Creek Restoration - PLN General - 7/18/2008 LILLIWAUP CREEK RESTORATION RECEDED
SITE EVALUATION JUL 2 2 2008
MASON COUNTY
MARTIG ENGINEERING
P.O. Box 11850
Olympia,WA 98508-1850
(360) 754-9687
Fax (360) 705-0789
June 30, 2008 (Z eV. Sv Y
Long Live The Kings
1326 Fifth Ave, Suite 450
Seattle, WA 98101
Attn: Michael Schmidt
Re: FLOOD DAMAGE TO LILLIWAUP CREEK:
*Damage Site:
Long Live The Kings, Lilliwaup Hatchery.
600 N Lilliwaup Street
P.O. Box 205
Lilliwaup,WA 98555
(360) 877-6960
Attn: Joy Waltenmire
* Site Location:Lots 3 &4 of Block 47 of Lilliwaup Falls.
Travel north on SR 101 to Lilliwaup, Washington from Shelton.
Take left onto N Lilliwaup Street at head of Lilliwaup Bay of Hood Canal. Proceed to
northerly dead end of Street and turn right,passing thru large gate and over bridge to east
side of Lilliwaup Creek. Veer right to Hatchery Site.
* Tax Parcel Nos.:32330-51-47003
* Mason County:Sec. 19, Township 23 N,Range 03 W;
* Purpose:This document outlines damages to the Lilliwaup Creek regime upstream from
the LLTK Lilliwaup Hatchery and presents stream restoration measures made necessary by
the December 2007 Heavy-rain induced flooding.
Dear Mr. Schmidt:
Martig Engineering has reviewed and documented the flood damages to the Lilliwaup Creek
regime located on the Reed's Property, from the base of Lilliwaup Falls to the eastern end of the
property below the hatchery.
The following sketches,photographs, and discussion present our findings and recommendations.
SUMMARY:
Based upon our analysis, it is imperative that stream restoration measures be implemented before
August 15, 2008,when adult summer chum begin returning to Lilliwaup Creek to spawn. It is
also imperative the work is done before heavy rains and high fall/winter flows return.
If not, additional severe damages will occur to:(i)the stream regime (shade trees, spawning beds
stream-bank stability, etc,);(ii)the Vehicle-Bridge;(iii)the Historic Power Plant's Tailrace;(iv)
the Historic Residence;(v)the access road servicing both the Hatchery Water Supply and the
Penstock:(vi)the Hatchery Facilities; and(vii) the other residences located within the
downstream easterly floodplain of Lilliwaup Creek..
DECEMBER 2007 STORM DISASTER:
Rapid runoff from unprecedented rainfall created conditions,within the very steeply sloping
portions of the Lilliwaup Creek watershed,that caused massive landslides of formerly stable
steep slopes.
This rapid,high-volume runoff carried the slides' sands, gravels, cobbles, and accompanying
forest woody debris down the very steep gradient slopes and channels within the watershed,
depositing them in the flat gradient portion of Lilliwaup Creek from the base of Lilliwaup Falls
all the way to Hood Canal.
The deepest resulting sediment deposits occurred between the pool, at the base of Lilliwaup
Falls, and the downstream nearby Vehicle-Bridge, for two reasons:
1. the source of the sediments was from both the steep upper reaches of Lilliwaup Creek
and the major Tributary that connects to the Creek at its major channel bend (the bend
where the elevated wooden Flume Structure from the Historic Power Plant spans the
natural Lilliwaup Creek channel);
2. the Lilliwaup Creek Channel is flat from the Falls to Hood Canal (and was under the
Tidal influence of the Canal before the deposits were laid),resulting in the loss of energy
required to keep the sediments moving downstream.
This Disaster is liken to the unprecedented deposits of sediment laid within the Toutle and
Cowlitz Rivers (when Mt. St. Helens erupted) that required extensive stream restoration.
2
The following page shows two photographs,both taken from the Historic Residence. The top
Photo #1 shows the core area between Lilliwaup Falls and the downstream Vehicle-Bridge,
before the unprecedented rainfall. The bottom Photo#2 shows the Creek regime damages that
resulted. Note the sediment deposits covering the prior grass meadow, except where the new
High-Flow Channel has been carved thru it.
Photo#1:
41
-,
sS
.w
Photo #2 }
�y '� 1 ^• ~ I Jul•
r
3
The following Sketch shows the prior existing natural location of Lilliwaup Creek within the
Floodplain between Lilliwaup Falls and the downstream Vehicle-Bridge.
S,
*kip
rn.�
� w
W
`n S
R'
JINN �
r � r
4
The following Sketch shows the flood damaged relocation of Lilliwaup Creek within the
Floodplain between Lilliwaup Falls and the downstream Vehicle-Bridge. Note the Photograph
locations shown in Green Numbers upon this Sketch. (For a more accurate representation,please
refer to the 2 foot by 2 foot site plan included in this package).
xl_ � J�
n
W \
it
R Oil
A %L r
o J
4
V)
J
�.! It -4 V
t y
TM
4-
d
A
5
The following sketches show the flood damage that occurred to the hatchery in the area
downstream of the roadway vehicle access bridge and the proposed restoration. A rough
description of the proposed restoration is also provided .
,e ase�1
6
n
iM 1. I t Deval eQa.! �7 t.�!�.I ' tS
_ Vic,
c 1L s
n
[rat4(
S,J,i.„ A-A
(Ne1-T•s��e�
ABC A: ., F Io
a
ok t.0N.P�(K4v11,C r i
stops S6,91—e,�4 of.,!
j � n
•i Li11iw.�P ?n�� �r.Slta ,T
c,&A4: bw
z
a._ Ssa�in•, A-A
(N•4 T•Se.le�
CRC9�e►e
FloeJpl..i.. �e Q�.or
Q J
-'# (Rsd*.•..►j i�s �•c-- o�..a�oPad yla4a1-ate � �•�.f
J LilG-P
5. tT
1
•
�� ar A-A
Sk.�l
bcww T*G
6
In reference to the sketches on the previous page, the diagram below shows where the hatchery
facility is located, downstream of the access bridge and away from the creek.
LILLIWAUP HATCHERY
SITE PLAN&TOPOGRAPHY MAP
(Lilliwaup Quad Map: "=100)
(20'Contours)
Nor PA
w Jf
� '
A ' 0 , . A
0
00
q00
00 C�CJ 00
�00 , 0
h
INVESTIGATION:
The following photographs document our investigation findings and support our conclusion that
stream restoration measures are needed to prevent further damage to the already damaged stream
regime.
Photo#3, looking downstream, from the pool at the base of the Falls, shows the sediment filled
prior existing Creek channel that existed left of the visible right-bank shade trees. The High-
Flow Channel, carved thru the grass meadow, is to the right of the trees heading to the right end
of the visible Historic Residence.
Photo#3:
AN
y I�
• S til
.TIV,
� •F
K
Photographs#4 thru#9 depict the depth of the sediment deposits laid between the Falls and the
Vehicle-Bridge.The locations and direction of each Photo are shown in the sketch on the
previous page(photo numbers in triangles).
Photo #4: Photo #5:
� I
Photo#6:Photo #7: y
r '4J
• _y.n'J 1 '1• J'��J .rI'.�..i� J!� wr
40
44
Photo #8:Photo #9:
AO
The water cascading down from the elevated wooden Tailrace Flume(shown in Photo #6) is the
flow of the major Tributary entering Lilliwaup Creek. This unnamed Tributary used to flow
9
under the elevated flume in a natural channel connecting to the prior existing Lilliwaup Creek
channel.
Photo#10 shows how the depth of the initially deposited sediments plugged the prior opening
under the wooden flume, where the Tributary's channel used to be located.
Photo #10:
MW
Jam' V� .,�5, •
• `` ,.ir awl.^._
The top portion of Photo#11 shows the Tributary's newly created cobble channel upgradient of
the wooden flume. This portion of the Tributary's channel remains on top of the initially laid
sediment deposits that remain wedged against the wooden flume. The Tributary's flow has
eroded the channel thru the deposited sediments on the downgradient side of the flume, where
the flow presently cascades over the top of the flume and along its downstream side.
Photo#11:
-,'�+-.•girt ,; .c.l, � � � _ - dT :��� "I'p' y .i
Ni—
'` -
.may + ,f'' 'i ` `' .i j '• _.^ . +'' - � '
The major Tributary, shown in the above Photos#10 l,provides the Primary Water Supply
to the Hatchery. The sediments remaining wedged against the upstream side of the wooden
flume, where the Tributary's new channel now exists, actually create a sediment plug that has
almost completely closed the 60-inch Diameter Culvert that conveys the major Tributary flow
under the access road servicing both the Hatchery Water Supply Intake Structure and the Historic
Power Plant Penstock Headworks.
11
The following Photo#12 shows the plugged condition of this important 60-inch Diameter
Culvert. You can barely make out the top of the culvert (appearing as a silver crescent)just
below the large rock.Note the brown log protruding from this culvert outlet.
Photo #12:
�4
got. APO*
ANN& fie
A Tailrace was installed to return the water, routed thru the Historic Power Plant,back to
Lilliwaup Creek at the pool located at the base of Lilliwaup Falls. This was to insure that the
streamflow within the Creek channel,between the Falls and the Historic Power Plant, remained
unchanged by the flow diverted thru the plant.
This Tailrace consists of an Elevated Wooden Flume and an Open Concrete Lined
Channel.Portions of this Tailrace are visible in the above Photographs. The following Photos
#13, #14,  show how this Tailrace remains filled with some of the initially laid sediments
deposited between the Falls and the Vehicle-Bridge.
Photo#13 shows the sediment filled Tailrace looking at its discharge location into the Falls'
pool. Photo#14 is looking toward the Elevated Wooden Flume where the High-Flow Channel,
carved thru the grass meadow,begins.
12
Photo#13:
Photo #14:
e f ^a•L _� _
Z M4
r w
13
Photograph#15,below, shows the inlet to the Elevated Wooden Flume filled with remaining
sediment, at the location where the major Tributary flow cascaded over the flume and down
along the downstream side of the flume(as shown in Photos#10  above).
Photo#15:
� s
12
"f 1
/ . .
AF-
The east abutment of the subject Vehicle-Bridge across Lilliwaup Creek was severely attacked
by the sediment laden flood flow and the car-bridge just downstream from the Hatchery was
swept away.
The following Photographs#16  show the concentrated erosion of the east floodplain bank
at the east Vehicle-Bridge abutment.Photo #17 shows the large fractured rock that was placed
during the flood (with an Emergency Permit). This armament saved the Abutment, the Vehicle
Bridge, and the shade trees. However, it is apparent that similar rock should be added to
complete the armament between the upstream Concrete Bulkhead and the east Bridge-Abutment
Concrete Wing-Wall.
14
Photo#16:
,r
..�.. ... .r,,c� L -.fir►,�.. R �
•
:Tina
Photo#17: (immediately downstream of, and overla ing, Photo#16, above)
ir I
TY.," i �, �+�..� .• yam
15
Photo i Photo of thefloodplain between the hatchery and Lilliwaup Creek,below
access bridge,bflood. Noteonce existing small tributary1•1 •
16
M a.
Photos#19 and 20: Photos of the floodplain between the hatchery and Lilliwaup Creek,below
the vehicle access bridge, after the flood. Several trees were demolished, and the acclimation
pond and small tributary stream was buried under about 4 to 6 feet of heavy gravel. Photos 19
and 20 were taken immediately after the flood and do not represent what the area looks like
today. Currently, there is no standing water and some of the gravel from around the hatchery
tanks has been moved.
.a 1
t
j7.
�W
17
LILLIWAUP CREEK RESTORATION WORK PLAN DECEIVE
(Phase I,with a brief description of the proposed Phase II work) ,JUL 2 2 2008
July 2I'h, 2008 MASON COUNTY
MARTIG ENGINEERING LONG LIVE THE KINGS
P.O. Box 11850 1326 5TH AVE. STE 450
Olympia, WA 98508-1850 SEATTLE,WA 98101
(360) 754-9687 206-382-9555 X27
Fax (360) 705-0789 FAX(206) 382-9913
Purpose
The purpose of the work is to restore and protect a major spawning location for ESA-listed
summer chum,protect property and structures from further damage, and protect Lilliwaup
Hatchery from catastrophic loss of Hamma and Lilliwaup summer chum and Duckabush and
Dewatto winter steelhead (all four stocks listed as threatened under the ESA)reared at the
facility(catastrophic loss occurred during the December 07 flood).
Much of the work is removing excess sediment that the stream cannot handle on its own.
Removing the excess loose material around the creek and preventing further bank erosion will
allow the creek to scour and continue to re-form itself naturally over the course of the next few
winters.
The current request is for completing Phase I of the restoration process. Phase II work will not be
completed at this time. Permit authorities WDFW and Mason County requested that the Phase II
portion be separated out due to the other property owners involved and the need for more
extensive evaluation.
Specifically:
Phase I
a) Reduce an upstream gravel bar that forces water into the meadow on the creek's elbow
and against the steep north slope, threatening to continue erosion;
b) Restore the upland meadow where a flood channel has cut through and remove excess
sediments from the right bank of the meadow above the vehicle access bridge to save
shade trees,prevent further erosion, and allow the creek to center itself under the bridge;
c) Remove the sediment from the mostly plugged 60-inch Culvert on Beardslee Creek and
restore the stream channel from the 60-inch Culvert to its intersection with Lilliwaup
Creek;
d) Reduce the sediment load in front of the historic residence, restore an upland area and
re-grade the bank slope with surplus sediments to protect a pre-existing concrete
retaining wall;
Lilliwaup Creek Restoration Work Plan July 21, 2008 .
e) Protect the property access bridge and adjacent slope from washout(like the washout of
the Car-Bridge downstream from the Hatchery)by armoring with fractured rock,
including a root wad for fish habitat;
f) Restore the flood plain adjacent to LLTK's Lilliwaup Hatchery,rebuild the facility's
acclimation pond, restore a mitigation stream in the floodplain and construct a berm to
protect the facility from further damages if flooding were to again occur;
Phase II (Not under the scope of the current permit request)
g) Restore mainstem flows in an area plugged with gravel downstream to prevent
degradation of the estuary and restore salmon spawning habitat.
Eusineer
Ken Martig of Martig Engineering—Ken Martig has 45 years of practical experience,mostly as
the primary owner of a private engineering practice. He has an MSCE Degree in Hydraulic
Engineering and has been an integral part of numerous environmental engineering projects, from
stream rehabilitation,to wastewater treatment, to dam and salmon hatchery construction and
maintenance.
Contractor
Ron Gold and RG Forestry-RG Forestry has an extended history of restoring numerous creeks
in the Hood Canal area.
Cost and Timeframe
The cost of the project is approximately$65,000-$75,000.
If authorized,the plan is to begin the work as early as Friday, July 250', and complete the work
no later than August 20`h when the adult summer chum begin returning.
Work Plan
The following is a list of the proposed work to be completed starting at the base of the falls and
working down toward the estuary. Please refer to the large format site plan,the cross-section
enlargements and the photos and rough diagrams in the site evaluation for a graphical description j
of the work.
Phase I
1. Gravel Bar
2
Lilliwaup Creek Restoration Work Plan July 21, 2008
Photos 1-3 of the above site evaluation and cross-sections 3-3, 4-4, 5-5, and 6-6 of the site plan
depict the gravel bar that was left by the flood just below the pool of Lilliwaup Falls. The gravel
bar is approximately 170' long and over 3' tall at its highest point.
The bar constrains what was once a single channel, dividing it into two streams and pushing the
original bounds of the stream. The higher channel along the right bank brings water to the edge
of the hydropower flume and is what caused the water to overflow through the elbow during the
flood. The lower, deeper channel along the left bank carries the highest concentration of water
and flow against the toe of the steep slope along the bank.
The plan is to reduce the grade of the gravel bar to 6" above water level so that the river can
migrate back to the center of the channel as scouring occurs with higher flows. This will prevent
further erosion to the toe of the north slope along the left bank and prevent the creek from
passing water over the upland area that is the elbow of the stream.
Approximately 600 yards of sediment will be removed. The sediment will be moved to the stock
pile/transfer area on the upland area of the elbow (see the site plan). The stock pile area is well
up and away from the flood zone at the back of the meadow/elbow where there is currently no
significant vegetation that will be impacted. From here sediment can be moved offsite.
2. Elbow
Photos 2 and 15 of the above site evaluation, the cross-sections on the page labeled X-1 and, on
the site plan, the area along the right bank from the concrete flume down to entrance road depict
the elbow.
During the flood, an overflow channel formed across the upland elbow. The channel directed
stream flow at the left bank of the original stream, eroding the bank and threatening the access
bridge abutment. The overflow channel remains but only has standing water in it as this time
(unlike what is show in the photographs).
Along the right bank of the elbow, directly above the entrance road and access bridge, excess
sediment accumulated, forcing the stream to the far left bank under the bridge, creating a much
steeper gradient right bank slope and choking shade trees. See the site plan area labeled "Remove
sediment from shade trees".
The plan is return the right bank of the elbow back to its original margin and grade, save the
shade trees, and then use some of the material removed (approximately 500 yards) to re-establish
the upland elbow area by filling in the overflow channel. After a year or two once the area
settles, this fill will be covered with topsoil and re-seeded with grasses like those on the
surrounding upland area.
The remaining excess sediment will be moved to the stock pile/transfer area on the upland area
of the elbow (see the site plan). The stock pile area is well up and away from the flood zone at
the back of the meadow/elbow where there is currently no significant vegetation that will be
impacted. From here sediment can be moved offsite.
3
Lilliwaup Creek Restoration Work Plan July 21, 2008
3. Beardslee Creek(Lilliwaup Creek Tributary)
Photos 4, 5, 10, 11, and 12 of the above site evaluation and cross-sections 1-1 and 2-2 of the site
plan depict Beardslee Creek and its confluence with Lilliwaup Creek.
During the flood, a major slide occurred on Beardslee Creek. Sediment from the slide passed
through the 60 inch culvert and buried the steeper gradient area from the culvert to the
confluence. Up to 8 feet deep of sediment was deposited, redirecting Beardslee Creek up and
over the wooden bridge for the hydro flume. The culvert was also plugged.
The plan is to unplug the 60 inch culvert,remove excess gravel from below the culvert, and re-
establish the prior Beardslee creek channel between the culvert and the confluence. The channel
to be re-established is approximately 75 feet long. The channel slopes will be graded to 2 to 1.
Up to 600 yards of sediment will be removed. The sediment will be moved to the stock
pile/transfer area on the upland area of the elbow (see the site plan). From here sediment can be
moved offsite.
To reduce the amount of water coming through the culvert while the work is being completed,
Beardslee Creek water will be bypassed around the culvert down to Lilliwaup creek using
pumps. Silt fences, etc. will be used at the confluence of Beardslee Creek and Lilliwaup Creek to
minimize sediment transport downstream.
(Plan revision based on WDFW request) The area underneath the hydro flume will also be
scalloped, deepened to increase flow capacity.
4. Left Bank in Front of Historic Residence
Photos 6 and 8 of the above site evaluation, cross-section 7-7 and X-2 of the site plan depict the
sediment deposit along the left bank in front of the residence, and that occurred erosion below
the residence between the two concrete retaining structures.
The plan is reduce the sediment load, repair the lower concrete retaining structure, and rebuild
the upland area between the lower and upper concrete retaining structure. The area may be
terraced if desired by the owner. Sediment from below will be used as base fill for the upland
area. After a year or so once the area settles, top soil will be added and the area will be replanted.
Erosion control fabric may be used if needed.
(Plan revision based on WDFW request) The area in front of the lowest concrete retaining
structure to the stream will be reduced in width and graded so that it slopes from the base of the
lower concrete retaining structure to 6"above the stream bed at the toe. The slope will be
extended the length of the lower concrete retaining structure. The width of the slope from the
retaining wall to the toe will be dictated by how it influences the stream flow as it moves
downstream towards the access bridge.
4
Lilliwaup Creek Restoration Work Plan July 21, 2008
The sediment deposit to be manipulated is 130' long, 30' wide and on average 7' deep,
approximately 1000 yards of material. Any excess sediment will be moved to the stock
pile/transfer area on the upland area of the elbow (see the site plan). From here sediment can be
moved offsite.
5. Left Bank and Access Bridge Abutment
Photos 16 and 17 of the site evaluation and cross-section 8-8 of the site plan depict the erosion
that occurred along the left bank just upstream of the access bridge. The erosion was primarily
caused during the flood when the creek migrated across the elbow through the overflow channel.
After the flood, an emergency HPA was authorized by the Washington Department of Fish and
Wildlife to insert a minimal amount of fractured rock to protect the bridge abutment from being
undermined. Erosion continued around the fractured rock and the bridge abutment until flows
subsided in the spring.
The plan is to add fractured rock to improve the armament and fill in the eroded area. The grade
of the slope and potential velocity of the water limit the options for bank armament. A large root
wad will be included near the base of the structure on its upstream end as mitigation to provide
habitat for fish.
The finished armament will extend approximately 40 feet from the bridge abutment upstream to
a big leaf maple root wad. Approximately 20 yards of fractured rock is required. Trees on the
property that were downed during the flood will be used to establish the root wad.
6. Floodplain restoration, hatchery protection and re-establishing the hatchery settling pond
Photos 18, 19 and 20 and the color cross-section A-A of the site evaluation and cross-section 9-9
of the work plan depict the floodplain and hatchery region. Photos 19 and 20 were taken
immediately after the flood and do not represent what the area looks like today. Currently, there
is no standing water and some of the sediment from around the hatchery tanks has been moved.
During the flood, a surge of water and sediment buried the land between Lilliwaup Hatchery and
Lilliwaup Creek. Up to 4 feet of sediment was deposited on the land and 8 feet of sediment
buried the hatchery's settling pond, blocking the water outtake. Additionally a man-made
tributary stream that was installed as mitigation for the hatchery building was buried. Several
chum once spawned in the mitigation stream and the area was prime juvenile rearing habitat. The
hatchery outtake has temporarily been excavated and a small diversion channel through the
excess sediment created for the mitigation stream.
The plan is to remove the excess dry sediment from the area between the hatchery and Lilliwaup
Creek (approximately 2,000 yards). This includes restoring the hatchery's settling pond (30'x
70'x 4') and the mitigation stream. The settling pond will be restored as it was, an earthen pond
with shallow sloped banks. A new outtake will be installed with a column that allows water to
exit if the pond is again buried. The mitigation stream channel was and will be very shallow and
narrow (no more than 1 to 2' deep and 5 feet wide). The restored stream area is approximately
5
Lilliwaup Creek Restoration Work Plan July 21, 2008
200 ft. Vegetation will be added as needed along the mitigation stream bank and some woody
debris will be incorporated.
Using the excess dry sediments removed, a new high-Creek-flow berm (approx. 15 feet wide x 6
feet high x 180 feet long, with logs placed laterally in the toe of the berm for reinforcement) will
be installed along the westerly edge of the hatchery, as close as possible(20' to 30')to the
facility, approximately 90-120 feet from the bank of Lilliwaup Creek. The berm will be
constructed to protect the hatchery facility from flow-related damage if another flood event were
to occur. The 2007 flood rose to a depth of 3 feet with flows directed at the hatchery building and
outdoor rearing tanks. 6 of the 28 outdoor rearing tanks were undermined as a result of high
flowing water scouring the ground. The berm will deflect flows but still allow the area continue
to function as a floodplain. A 24"culvert will be included in the berm for the mitigation stream
to pass through. The culve4fwidth was based upon another pre-existing culvert (18") about 40
feet upstream that salmon have been found to pass through without a problem. We are currently
in the process of modifying the hatchery facilities intake and outflow structures so that the entire
facility can continue to operate even when submerged in up to three feet of water(basically,
operate in the conditions presented during the 2007 flood event).
Phase II
7. Pony channel through the gravel plug downstream of the Reed's property
The site evaluation presented on June 300'did not include the 900 foot gravel plug as it focused
on the Reed's property itself. After the evaluation was complete, engineer Ken Martig felt it was
necessary to acknowledge the gravel plug and its potential impacts if nothing is done to reduce it.
Please see the separate site plan(2/2) and cross-sections 10-10 through 13-13 that were created
to describe the gravel plug and the proposed work to be completed. Also the following photos
depict the plug:
6
Lilliwaup Creek Restoration Work Plan July 21, 2008
Photos I and II. Upstream end of gravel plug and area where mainstem flow is now diverted
eastward into the estuary.
•
.-a
S•' A
A 1 !
'4
7
Lilliwaup Creek Restoration Work Plan July 21, 2008
Photos III and IV. Looking down (I1I) and up (IV)the 900 ft gravel plug. The gravel is up to 3
feet above the water level in some areas.
rJ
Y
- .... a... 1..
1 i
� S
� J.
h �
3.y"' '
V 3...�1 r
i
n
a
8
Lilliwaup Creek Restoration Work Plan July 21, 2008
Photo V. The tail end of the gravel plug in a zone of tidal influence. High tides bring water
approximately 300 feet up the plug. Currently, the plug is above water even during high tide.
• .�� illt
Aaa
41
a�L
The 900 foot plug is a result of gravel settling in an extremely low gradient to slightly upward
gradient area of the creek. The gravel now plugs what was the mainstem reach. Water has been
diverted eastward into the estuary into braids that typically do not see the amount of flow
produced by the creek. If the gravel plug is left, the concern is that flows will continue east into
the estuary and degrade the estuary channels that are primarily composed of fine sediments.
Additionally, a lot of water has gone subterranean under the plug, reducing the amount of water
available to provide fish passage. The vast area above the tidal influence on the gravel plug was
historically spawning habitat for summer chum. Finally, some of the subterranean flows appear
to have migrated under the rip-rap protecting Lilliwaup Road(the road that follows closely to
what was the mainstem and now is the plug). There are concerns that the flows could erode the
surface below the rip-rap and the road, threatening their integrity.
The proposal is to create a 20'wide pony channel up through the gravel bar to restore mainstem
flows to the area. A control sill would be installed where the water currently flows eastward to
bring the main flow back into the pony channel. The walls of the pony channel would degrade
over time and return the mainstem to a similar state prior to the flood. Please see the site-plan
and cross sections 10-10 through 13-13 for a graphical depiction.
Excavation of the pony channel would begin on the downstream end of the plug so that the
machines can work in the dry the entire time. When operations near the upstream end of the
plug, or if water is reached, silty water will be pumped away from the site and strained through
upland grassy areas. Silt fences, etc. will be used to control downstream migration of sediments.
A sediment catchment basin will also be created near the upstream end of the plug that will be
pumped.
9
Lilliwaup Creek Restoration Work Plan July 21, 2008
Equipment and Operations
The following is a list of equipment that will be used to complete the work:
Excavators:
• Komatsu PC120, 27,OOO1b, steel tracked
• Komatsu PC75, 17,OOO1b, rubber tracked
• Komatsu PC25,mini-excavator
Front-end loaders :
• ASV RC60 rubber tracked skip loader
• Komastu rubber tracked dozer
• John Deer 550 dozer
Carriers:
• Morooka 4 and 6 yd tracked carriers (for moving material out of creek basin where
necessary)
• 3 standard 10 yard dump trucks (for removing material offsite)
Mini-excavators and large excavators will be used for excavating the delineated undesirable
sediment mounds. The large excavators are equipped with an articulating lever/thumb for
picking up undesirable debris that is mixed within the sediment mounds, and for placing large
fractured rock where delineated. The dozers will also be used for sediment removal and for re-
grading bank slopes where necessary.
The carriers will be used to move the excavated sediments off-site or to safer locations outside of
the primary stream floodplain. The Morooka tracked carriers are capable of removing materials
from more delicate zones with minimal impact and without stirring up sediment.
Note regarding equipment access: For all work upstream of the Reed property entrance road
(except for the rip-rap along the left-bank adjacent the access bridge),the equipment access point
will be above the right bank before the access bridge. For work downstream of the access bridge
adjacent to the hatchery, the access point will be the hatchery parking lot adjacent the hatchery
building. For work on the 900 foot gravel plug near the estuary, a temporary slope and platform
will have to be established from Lilliwaup Road to the plug.
Fish in Lilliwaup Creek
Duringthe work period there will be cutthroat and juvenile coho in the creek, as identified b
p J Y
LLTK Lilliwaup Hatchery staff. ESA-listed summer chum will not be in the creek durini the
work period. The chum do not return until mid to late August(approximately August 20 ). All
fish will be removed from work sites to safe areas in Lilliwaup Creek with dip nets by LLTK
Lilliwaup Hatchery staff and kept out of work sites using gravel-filled burlap bags.
10
Lilliwaup Creek Restoration Work Plan July 21, 2008
Lessening Impacts
• Most of the equipment that will be used operates on rubber tracks with high weight
distribution to minimize the potential for degrading the area of operation. The steel tracked
excavator will only be used in areas where the ground is highly stable.
• The equipment will work from a position upon dry sediments,removing the mounds of
undesirable sediments that are also primarily dry. Therefore, very little water will be stirred
up nor will much water pass thru the removed sediments.
• When equipment must cross the stream, it will do so on mats or make-shift bridges,
constructed using old culvert sections and mats. The equipment wheels/tracks will not come
in contacted with the wetted stream bottom gravel/deposits.
• Equipment used for this project shall be free of external petroleum-based products while
working around the stream. Accumulation of soils or debris shall be removed from the drive
mechanisms(wheels,tires,tracks, etc.) and undercarriage of equipment prior to its working
below the ordinary high water line. Equipment shall be checked daily for leaks and any
necessary repairs shall be completed prior to commencing work activities along the stream.
• Erosion control methods shall be used to prevent silt-laden water from entering the stream
during all phases of the project. These may include,but are not limited to, filter fabric,
temporary sediment ponds, check dams of pea gravel-filled burlap bags or other material,
and/or immediate mulching of exposed areas. If high flow conditions that may cause
siltation are encountered during this project,work shall stop until the flow subsides.
• If fish are in the project area, they will first be removed by LLTK Lilliwaup Hatchery staff
using dip nets. The work area will be enclosed using burlap sacks to prevent fish access.
• If at any time, as a result of project activities, fish are observed in distress, a fish kill occurs,
or water quality problems develop (including equipment leaks or spills), immediate
notification shall be made to the Washington Department of Ecology at 1-800-258-5990, and
to the Area Habitat Biologist.
• Water in work areas will be removed using submersible or trash pumps and, if silty,
transferred to upland grassy areas for filtration.
• Where there is silty water, or standing water in an upland project area, such as work that is
occurring in the overflow channel on the elbow, any fish found will be removed by LLTK
Lilliwaup Hatchery staff with dip nets and reintroduced in the stream. The water will then be
removed with submersible pumps and transferred to upland grassy areas for filtration.
• For establishing the rip-rap on the left bank adjacent the access bridge abutment,the large
fractured rock being placed is also clean and dry. It will be positioned like placing a cup
within a saucer,hence no mucking of the stream.
• Note that the sediments being removed, and the majority of the stream bottom sediments, are
larger than very coarse sand. They are mostly large rock and cobbles ranging in size from
11
Lilliwaup Creek Restoration Work Plan July 21, 2008
pea-gravel to 4" - 10" diameter cobbles. These soil sizes do not create muck when disturbed.
Very little fine-sand, silt and clay sized soil remains (between the Falls pool and the washed
out car-bridge location), since the large flows flushed them to resting locations downstream.
These fine soils are the ones that create muck when stirred-up. Since they are not present in
normal quantities, even when the make-shift bridges and mats are being placed &removed,
only insignificant mucking will occur.
• If at any time, as a result of project activities, fish are observed in distress, a fish kill occurs,
or water quality problems develop (including equipment leaks or spills), immediate
notification shall be made to the Washington Department of Ecology at 1-800-258-5990, and
to the Area Habitat Biologist.
Stream Monitorins
At the request of the Washington Department of Fish and Wildlife, LLTK, applicant and leasee
of the hatchery on the Reed's property, will continue to monitor gravel deposition in the stream
after the work is completed to determine whether Lilliwaup Creek is aggregating or degrading
and other changes to the stream. LLTK will work with WDFW to establish a monitoring plan.
12
PROJECT
•SEATTLE i
FALLS g� VICINITY MAP
lea
SCALE MILES o 1
00- Zoo
-1'1ZZ W4 �P PI
50 �APPROX GOD
SITE
o
Q
� o
w a
J ;,0
v
Q
I m
0
STORE O
LOCATION C ATION MAP
goo
(O " = MILE
Figure 1 Location map of Lilliwaup Wild Salmon Facility
2
r1 fWlw J Yla f�H,1 W N N. •.asl.�a tw-w ft. rMn
.�>V w«. ••wi,o�t..-«t•. ap,a .t« u« ys tw« t«w wn• t•'a• .�„ �Z �r.
Oil
r -
••, " \ 6 _
00 .I
' o.o00
J R
_ 1
1,�. 1
' i t
' .f.. .... .r,. .i.. .�,. .1.. .�,. .�.. .tw ,.: .I... .e. ,.;,. �.;.. �in ,>I>o ..I>e a,',o ,ai•e m++ . .m. . . '�
—1
P�qT �jo�•e�A"t�S 1
1
y - U i7 a J J r-
a� �. a � �It f7 N •�- .)R., i a r ) b' � �� f"i 'W .. ° d1 1 d1 I 7 h y. I 17 i N -1 _ _.�
--._ _._�.._ I i� .'.—„_ I- � y . _...;�.' -,.�ii.YJR_• �„1-i,_ ..J.� \i,••{'r•`:4',•y�'_•' V < ,' ' i' y ��
V) i
0 � � '��•i
i
xi�r-
CD
N G Q� 61 r t9 8U - 1 6� ® N - W.Nd d rt I
r► I , \
i i. y _i u y 1.1't"-µ-�t"�t�"' S---1'' `„-i--f�T-
10
N•1 ��// lY/ �{ -Y o.P e.l oS 'i!` 09' 4J. O,f 0.1
N I r> I �} b 1: o I r. I _ 61 I n ' h di °o u N 4 I a`.�I.N _ c
1,-:c,I m o I _ I N 1 A i Q '�'� - I - _ !® -- - i -• - Q - - _ 1 - I I �- � -� .- I I I __I.•• `I N 9_
u•r .� �i i li Q
aAv
-f-rT
1 1
U; - I o I B7 ,i •° n I h a'
` I.... •� i r..._:.: �....... -. ...:3...a.T_..._o' �...�S.._�..'.-+.:_i S• 41 �•?'y`__�...:�._�.�.al__°_=•._lc.f�y o!�; o t'_� o!•_ q p• n r i „r 1.o , o-. y.aS a .+S O� _o S .�.0
� .
4. r
LLIWAUP FALLS GENERATING CO .
'HATCHERY SITE
12 7 12
0 W ESTin
7
f G Hatchery i I
r -0 Bldg.--�j
[1--Bldg.
Storage I 6
-- D
C ►-48 i w� = i
705 Effluent - O 0 '
-_ . O • 5
rn ` Pond Z
81O0
0 8
O O
i ! I ---
D 00
m 3 81
R O 1 3
63.lI _ Rearing Tanks
' EAST '
r7 od
y 2 17 2 17 Z
� 1
w u
0
a 0 I 18 I 18 I
n
w
100 _ 50 — 100 ---�00— 30 -70
rt
o
m
w
�j
Svare, U�1,_ (300 c z_ o ck"
s
�91 o
10
r
t
Q1 u5�<d
C,Ao ev}-
a4LaIttt�
c f
4P
Cti
LOI
v
G'�� �jT 1^l D V LttC` CI.�MN G
70
b 0 4 t7 2-0
a
l �C 1v!✓r
70
too 80
20'
�I
pArlo -�`-+a���as dal �qL'1'��1' �� a�
- �a
sy�F ,. p�s��a� to v
r iv C7 V
�t�'
OL
Aq
o(v
oZ 11
QL
lr�
/XtIP, N �OfIv /�7 x �a �)ti�
,1vC7
IOV4 h
I
b
�v
sa �
o
J°
Lo.✓P✓
Gv at�C
PIAVt ���
n�
Re-VISed
G,.-ade
00
Se..+t, es-A i
t''=Mo
�j
�O
i
a
W e��
.Ao CS g
R
l P
1
Road �
ne-
51�e
�r -
Qlah
-7l Ho cx
f
f� '
x
KI
^ -�
�� v�` � x`'t �9 0 �1
J�
Q° e flD
(�� ���"''au P �,✓ �� �'� X �A� � �(e -a�
`
1� 3 �oQ 0✓lve�.�w��q� 'raa�
70
r...v. P,'prt F_*ij jn 4* Abe!
Br
24
L7l V5
r�
� � b <o-R
roo
J � ,
Gv � i'r�o�- C�{-►� 2 Sir cavv,
GInAHN� .,
�o l
(O 0
90 3• Qo
6a
. S ed ����-,�-- Covered ��hel�� � 6�►, �6�
6�
d
ar�d�e
fob
�
J '47 ?r<<
+T`
213 95s� c
7Q
LA I-k
%A
4 L
' P
n -7 a p
.�- E— Cros� $ �-lo►� d A r
-2
d >�\>
CA
sKsx i� f�
1 0
�s
J d �
o.
n �
w004 Au-AC
0 0
T — X
f
� Locw�tlh
i 3 o a
lit
11
40, W f 141
0.1I K1
I g'ti � DSO
QV
TiO,3�tl
•r .-+•far— _ _
cc), 6s
60
Re�Kes�kd. Sec-�-tov. � K-5 i_oo�ca►,,.� a} g�lk�.eo�d ' '�
5
i 5-J
(7/1/2008) Tammi Wright- Martig engineering evaluation -30June08.doc Page 1
MARTIG ENGINEERING
P.O.Box 11850
Olympia,WA 98508-1850
(360)754-9687
Fax(360)705-0789
June 30, 2008
Long Live The Kings
1326 Fifth Ave, Suite 450
Seattle,WA 98101
Attn: Michael Schmidt
Re:FLOOD DAMAGE TO LILLIWAUP CREEK:
*Damage Site:
Long Live The Kings,Lilliwaup Hatchery.
600 N Lilliwaup Street
P.O.Box 205
Lilliwaup,WA 98555
(360)877-6960
Attn: Joy Waltermire
* Site Location:Lots 3 &4 of Block 47 of Lilliwaup Falls.
Travel north on SR 101 to Lilliwaup,Washington from Shelton.
Take left onto N Lilliwaup Street at head of Lilliwaup Bay of Hood Canal.Proceed
to northerly dead end of Street and turn right,passing thru large gate and over bridge
to east side of Lilliwaup Creek.Veer right to Hatchery Site.
*Tax Parcel Nos.:32330-51-47003
*Mason County:Sec. 19,Township 23 N,Range 03 W;
*Purpose:This document outlines damages to the Lilliwaup Creek regime upstream
from the LLTK Lilliwaup Hatchery and presents stream restoration measures made
necessary by the December 2007 Heavy-rain induced flooding.
Dear Mr. Schmidt:
Martig Engineering has reviewed and documented the flood damages to the Lilliwaup
Creek regime located on the Reed's Property,from the base of Lilliwaup Falls to the
eastern end of the property below the hatchery.
The following sketches,photographs,and discussion present our findings and
recommendations.
(7/1/2008) Tammi Wright- Martig engineering evaluation -30June08.doc Page 2
SUMMARY:
Based upon our analysis,it is imperative that stream restoration measures be implemented
before August 15,2008,when adult summer chum begin returning to Lilliwaup Creek to
spawn.It is also imperative the work is done before heavy rains and high fall/winter flows
return.
If not,additional severe damages will occur to:(i)the stream regime(shade trees,
spawning beds stream-bank stability,etc,);(ii)the Vehicle-Bridge;(iii)the Historic Power
Plant's Tailrace;(iv)the Historic Residence;(v)the access road servicing both the
Hatchery Water Supply and the Penstock:(vi)the Hatchery Facilities;and(vii)the other
residences located within the downstream easterly floodplain of Lilliwaup Creek..
DECEM 3ER 2007 STORM DISASTER:
Rapid runoff from unprecedented rainfall created conditions,within the very steeply
sloping portions of the Lilliwaup Creek watershed,that caused massive landslides of
formerly stable steep slopes.
This rapid,high-volume runoff carried the slides' sands,gravels,cobbles,and
accompanying forest woody debris down the very steep gradientslopes and channels
within the watershed,depositing them in the flat gradient portion of Lilliwaup Creek from
the base of Lilliwaup Falls all the way to Hood Canal.
The deepest resulting sediment deposits occurred between the pool,at the base of
Lilliwaup Falls,and the downstream nearby Vehicle-Bridge,for two reasons:
1. the source of the sediments was from both the steep upper reaches of Lilliwaup
Creek and the major Tributary that connects to the Creek at its major channel
bend(the bend where the elevated wooden Flume Structure from the Historic
Power Plant spans the natural Lilliwaup Creek channel);
2. the Lilliwaup Creek Channel is flat from the Falls to Hood Canal(and was under
the Tidal influence of the Canal before the deposits were laid),resulting in the
loss of energy required to keep the sediments moving downstream.
This Disaster is liken to the unprecedented deposits of sediment laid within the Toutle
and Cowlitz Rivers(when Mt. St.Helens erupted)that required extensive stream
restoration.
The following page shows two photographs,both taken from the Historic Residence.The
top Photo#1 shows the core area between Lilliwaup Falls and the downstream Vehicle-
Bridge,before the unprecedented rainfall.The bottom Photo#2 shows the Creek regime
damages that resulted.Note the sediment deposits covering the prior grass meadow,
except where the new High-Flow Channel has been carved thru it.
(7/1/2008)Tammi Wright - Martig engineering evaluation -30JuneO8.doc Page 3
Photo#1:
I
Photo #2
s
gw .. :Tire
e
;�.-
(7/1/2008)Tammi Wright - Martig engineering evaluation -30JuneO8.doc Page 4 11
The following Sketch shows the prior existing natural location of Lilliwaup Creek within
the Floodplain between Lilliwaup Falls and the downstream Vehicle-Bridge.
(7/1/2008) Tammi Wright - Martig engineering evaluation -30JuneO8.doc Page 5
x�
x
i
r°
The following Sketch shows the flood damaged relocation of Lilliwaup Creek within the
Floodplain between Lilliwaup Falls and the downstream Vehicle-Bridge.Note the
Photograph locations shown in Green Numbers upon this Sketch.
7 1 2008) Tammi Wright - Martig engineering evaluation -30June08.doc Page 6'
O
Y s
0
A
41
f � ao R
s
�� Y1
J C
i
r
� t
The following sketches show the flood damage that occurred to the hatchery in the area
downstream of the roadway vehicle access bridge and the proposed restoration.A
description of the proposed restoration is provided in the work scope later in this
(7/1/2008)Tammi Wright- Martig engineering evaluation -30JuneO8.doc Page 7
document.
i __ Cc cl oaf µweal i cry M 3 1 -J w f IW.iar� <A
Src�ion A-A
cAti.po�a R4v�Na � s,�
epasi .� �•�
YV i tl6�
Ssc�in•. A-A
��ler
d v
due Ssc�tiah A-A
In reference to the sketches on the previous page,the diagram below shows where the
hatchery facility is located, downstream of the access bridge and away from the creek.
. -- _ _ ............
_
(7/1/2008) Tammi Wright- Martig engineering evaluation -30JuneO8.doc Page 8 '
F
LILLCYJAUP HATCHERY
SITE PLAN&TOPOGRAPHY MAP
(Llliwaup Quad Map:!"=100')
(2W Contours)
Nor PA
00 GO
p tv
.,. ,-✓ OQ
Q
s
I
f
INVESTIGATION:
(7/1/2008)Tammi Wright- Martig engineering evaluation -30JuneO8.doc Page 9
The following photographs document our investigation findings and support our
conclusion that stream restoration measures are needed to prevent further damage to the
already damaged stream regime.
Photo#3,looking downstream,from the pool at the base of the Falls,shows the sediment
filled prior existing Creek channel that existed left of the visible right-bank shade trees.
The High-Flow Channel,carved thru the grass meadow,is to the right of the trees
heading to the right end of the visible Historic Residence.
Photo#3:
i
oce
.wA+
Photographs#4 thru#9 depict the depth of the sediment deposits laid between the Falls
and the Vehicle-Bridge.The locations and direction of each Photo are shown in the sketch
on the previous page(photo numbers in triangles). I
(7/1/2008) Tammi Wright - Martig engineering evaluation -30JuneO8.doc Page 10�
Photo#4: Photo#5:
n
u m
Photo#6:Photo#7:
a ;
H
u
w
Ict .
Photo#8:Photo#9:
1
wa r C
The water cascading down from the elevated wooden Tailrace Flume(shown in Photo#6)
is the flow of the major Tributary entering Lilliwaup Creek.This unnamed Tributary used
to flow under the elevated flume in a natural channel connecting to the prior existing
Lilliwaup Creek channel.
(7/1/2008) Tammi Wright - Martig engineering evaluation -30JuneO8.doc _---Page 11T�
Photo#10 shows how the depth of the initially deposited sediments plugged the prior
opening under the wooden flume,where the Tributary's channel used to be located.
Photo#10:
� � A
i
P
The top portion of Photo#11 shows the Tributary's newly created cobble channel
upgradient of the wooden flume. This portion of the Tributary's channel remains on top
of the initially laid sediment deposits that remain wedged against the wooden flume.The
Tributary's flow has eroded the channel thru the deposited sediments on the
downgradient side of the flume,where the flow presently cascades over the top of the
flume and along its downstream side.
(7/1/2008) Tammi Wright - Martig engineering evaluation -30JuneO8.doc Page 121
Photo#11:
4 ,Y .yy
y r
y�
s
t
The major Tributary,shown in the above Photos#10,provides the Primary Water
Supply to the Hatchery. The sediments remaining wedged against the upstream side of the
wooden flume,where the Tributary's new channel now exists,actually create a sediment
plug that has almost completely closed the 60-inch Diameter Culvert that conveys the
major Tributary flow under the access road servicing both the Hatchery Water Supply
Intake Structure and the Historic Power Plant Penstock Headworks.
The following Photo#12 shows the plugged condition of this important 60-inch Diameter
Culvert. You can barely make out the top of the culvert(appearing as a silver crescent)
just below the large rock.Note the brown log protruding from this culvert outlet.
Photo#12:
(7/1/2008) Tammi Wright- Martig engineering evaluation -30June08.doc Page 13
i
k a
r
ti
A Tailrace was installed to return the water,routed thru the Historic Power Plant,back to
Lilliwaup Creek at the pool located at the base of Lilliwaup Falls.This was to insure that
the streamflow within the Creek channel,between the Falls and the Historic Power Plant,
remained unchanged by the flow diverted thru the plant.
This Tailrace consists of an Elevated Wooden Flume and an Open Concrete Lined
Channel.Portions of this Tailrace are visible in the above Photographs.The following
Photos#13,#14, show how this Tailrace remains filled with some of the initially
laid sediments deposited between the Falls and the Vehicle-Bridge.
Photo#13 shows the sediment filled Tailrace looking at its discharge location into the
Falls' pool.Photo#14 is looking toward the Elevated Wooden Flume where the High-
Flow Channel,carved thru the grass meadow,begins.
I
(E 7/1/2008)Tammi Wright- Martig engineering evaluation -30June08.doc � _ Page 14
I
Photo#13:
I„y IijvrN
Photo#14:
ro _
r
E
S
,k
(7/l/2008)Tammi Wright - Martig engineering evaluation -30JuneO8.doc Page 15
Photograph#15,below,shows the inlet to the Elevated Wooden Flume filled with
remaining sediment,at the location where the major Tributary flow now cascades over
the flume and down along the downstream side of the flume(as shown in Photos#10&
#11 above).
Photo#15:
,ar
i.
d
.P k
m
,W
The east abutment of the subject Vehicle-Bridge across Lilliwaup Creek was severely
attacked by the sediment laden flood flow and the car-bridge just downstream from the
Hatchery was swept away.
The following Photographs#16 show the concentrated erosion of the east
floodplain bank at the east Vehicle-Bridge abutment.Photo#17 shows the large fractured
rock that was placed during the flood(with an Emergency Permit).This armament saved
the Abutment,the Vehicle Bridge,and the shade trees.However,it is apparent that
similar rock should be added to complete the armament between the upstream Concrete
Bulkhead and the east Bridge-Abutment Concrete Wing-Wall.
(7/1/2008) Tammi Wright- Martig engineering evaluation -30June08.doc Page 16
Photo#16:
w.
s
r �
Photo#17: (immediatel downstream of,and overla in ,Photo#16,above
Photo#18: Photo of the floodplain between the hatchery and Lilliwaup Creek,below the
_.......
(7/1/2008) Tammi Wright- Martig engineering evaluation -30JuneO8.doc Page 17
vehicle access bridge,before the flood.Note the once existing small tributary stream in
the floodplain.
x
�e
(7/1/2008) Tammi Wright- Martig engineering evaluation -30JuneO8.doc Page 18
Photos#19 and 20:Photos of the floodplain between the hatchery and Lilliwaup Creek,
below the vehicle access bridge,after the flood. Several trees were demolished,and the
acclimation pond and small tributary stream was buried under about 4 to 6 feet of heavy
gravel.
ry=
rM
I
r,
A.
9F. p1
i
! ( F
t r.
4-4
M111111111111111111-
� r {F•'" �i.^1.. »rye" - 4 jJ
. .. � . ,
(7/1/2008)Tammi Wright- Martig engineering evaluation -30June08.doc Page 19
NECESSARY STREAM RESTORATION
i
Purpose
The purpose of the work is to restore and protect a major spawning location for ESA-
listed summer chum,protect property and structures from futher damage, and protect
Lilliwaup Hatchery from catastrophic loss of Hamma and Lilliwaup summer chum and
Duckabush and Dewatto winter steelhead(all four stocks listed as threatened under the
ESA)reared at the facility(catastrophic loss occurred during the December 07 flood).
Over 90%of the work is removing excess sediment that the stream cannot handle on its
own.
Specifically:
a) Restore the lost Creek Spawning areas and protect existing spawning areas;
b) Save the Creek Shade Trees from dying and/or washout;
c) Save the Vehicle-Bridge from washout(like the washout of the Car-Bridge
downstream from the Hatchery)and prevent further washout of the bank abutting
the historic residence
d) Remove the sediment from the mostly plugged 60-inch Culvert on Beardslee
Creek to restore its flow capacity;
e) Restore the major Tributary stream(Beardslee Creek) channel from the 60-inch
Culvert to its intersection with Lilliwaup Creek,under the wooded flume;
f) Save the Access Road that services the Hatchery Water Supply Intake Structure
&the Historic Power Plant Penstock Headworks;
g) Prevent further damage to the Historic Power Plant Tailrace&restore it;
h) Reduce further damages to the LLTK Lilliwaup Hatchery located immediately
downstream.
i) (For possible inclusion)Removal of gravel plug in stream's mainstem, at the
head of the estuary downstream of the Reed's property
Removing the excess loose material around the creek and preventing further bank erosion
will allow the creek to scour and continue to re-form itself naturally over the course of the
next few winters.
Scope
The following is a list of the proposed work to be completed. The work is estimated to
take 3 to 4 weeks to complete and cost approximately$100,000. See the before damage
creek sketch for the area above the vehicle access bridge(basically,restore the area to its
pre-flood state)and the after restoration sketch for the area adjacent to the hatchery for a
depiction of how things should look after the work is complete:
a) Remove the sediments from the 60-inch culvert on Beardslee Creek,below the
hatchery intake;
(7/l/2008)Tammi Wright- Martig engineering evaluation -30JuneO8.doc Page 20
i
b) Remove the sediments stacked up in and against the wooden flume to restore the
Beardslee Creek stream channel under the flume where it enters Lilliwaup Creek;
c) Remove excess sediment from areas of build up along the existing concrete
bulkheads and fractured rock retainment structure under the historic residence and
dispose much of the removed sediment offsite.Use some of the remaining
sediment to fill in behind a new ecology block retaining wall to be constructed
above the existing retainment structure,in between the two hillside concrete
walkways/bulkheads. This retainment structure will replace property lost during
the December 2007 storm and protect the hillside from further erosion in extreme
high water events. (see photos 4-9)
d) Repair the damage to the existing concrete bulkheads along the frontage of the
Historic Residence;
e) Complete the placement of Large Fractured Stones along the easterly edge of the
Creek,between the existing upstream Concrete Bulkhead and the existing Vehicle-
Bridge Abutment Concrete Wing-Wall. This is required to protect the vehicle
bridge that provides access to the property,which stands on spread footings that
will be comprised if the work is not completed. (for location, see photos 16& 17).
Up to 3 truckloads of fractured rock will be used.
f) Restore the meadow on the opposite side of the historic residence by removing
sediment from some areas and filling in others such as the area scoured during the
flood (this scour is currently dry with no water running through it. The picture in
this report was taken earlier in the season). Excess sediment will either be
disposed of offsite or moved well up and away from the flood zone to the back of
the meadow where there is currently no significant vegetation that will be
impacted.
g) Without entering or disturbing the present wetted/flowing streambed,remove
remaining dry sediments from the preexisting Lilliwaup Creek channel zone on
property so the stream can expand in width to its previous state as scouring
occurs;
h) Remove the smothering sediment from around streambank shade trees.
i) Using the excess dry sediments (gravel)removed from the preexisting channel
zone, install a new high-Creek-flow berm(approx. 15 feet wide x 4 feet high x
200 feet long) along the westerly edge of the Hatchery, approximately 150 feet
from the bank of Lilliwaup Creek,using the sediments deposited during the Flood
Event. The berm will be constructed to protect the hatchery facility from flow-
related damage if another flood event were to occur. The 2007 flood rose to a
depth of 3 feet with flows directed at the hatchery building and outdoor rearing
tanks. 6 of the 28 outdoor rearing tanks were undermined as a result of high
flowing water scouring the ground (these will also be repaired as part of the
work). The berm will deflect flows but still allow the area continue to function as
a floodplain. We are currently in the process of modifying the hatchery facilities
intake and outflow structures so that the entire facility can continue to operate
even when submerged in up to three feet of water(basically, operate in the
conditions presented during the 2007 flood event). Additionally,the settling pond
will be restored. See the sketches presented previously in this document.
j) (For possible inclusion)Remove the plug of gravel in the mainstem of Lilliwaup
[(7/l/2008)Tammi Wright- Martig engineering evaluation -30JuneO8.doc Page 21
Creek,downstream of the Reed's property.At the head of the estuary,the creek
has been plugged.Most of the water now goes below the gravel,with very little
veering into another channel in the estuary. To provide the appropriate access for
summer chum traveling upstream during low flows,this plug should be removed.
The plug is about 100-150 feet in length. There is no water in that area now. The
creek could continue to be diverted while the gravel is removed. This component
is not currently included because it is not on the Reed's property.We are still
trying to determine who's property it is on,or if this is a county or DOT issue if it
is in a public land area.
Equipment
Mini-excavators and large excavators will be used for excavating the delineated
undesirable sediment mounds.The large excavators are equipped with an articulating
lever/thumb for picking up undesirable debris that is mixed within the sediment mounds,
and for placing large fractured rock where delineated.Front end loaders will fill Dump-
Trucks to move the excavated sediments off-site or to safer locations outside of the
primary stream floodplain. Small dozers and backhoes will be used to remove the
sediment mounds that are choking/killing the stream shade trees.
All equipment will work from a position upon dry sediments,removing the mounds of
undesirable sediments that are also dry. Therefore,no water will be stirred up nor will any
water pass thru the removed sediments. The large fractured rock being placed is also
clean and dry. It will be positioned like placing a cup within a saucer,hence no mucking
of the stream.When equipment must cross the stream,it will do so on make-shift bridges,
constructed using old culvert sections and mats. The equipment wheels/tracks will not
come in contacted with the wetted stream bottom gravel/deposits.
It is important to note that the sediments being removed,and the majority of the stream
bottom sediments,are larger than very coarse sand. They are mostly large rock and
cobbles ranging in size from pea-gravel to 4"- 10"diameter cobbles.These soil sizes do
not create muck when disturbed.
Very little fine-sand,silt and clay sized soil remains(between the Falls pool and the
washed out car-bridge location),since the large flows flushed them to resting locations
downstream. These fine soils are the ones that create muck when stirred-up. Since they
are not present in normal quantities,even when the make-shift bridges and mats are being
placed&removed,only insignificant mucking will occur.
Monitoring
At the request of the Washington Department of Fish and Wildlife,Long Live the Kings,
applicant and leasee of the hatchery on the Reed's property,will continue to monitor
gravel deposition in the stream to determine whether the stream is aggregating or
degrading.Monitoring will be performed by measuring from the bridge to the stream bed.
Page 1 of 16
Michael Schmidt
To: Kenneth W. Martig Jr.
Subject: RE: LLTKStreamDamage06-13-08E-MaiModi.doc
MARTIG ENGINEERING
P.O. Box 11850
Olympia, WA 98508-1850
(360) 754-9687
Fax 360 705-0789
June 12, 2008
Long Live The Kings
1326 Fifth Ave, Suite 450
Seattle, WA 98101
Attn: Michael Schmidt
Re: FLOOD DAMAGE TO LILLIWAUP CREEK:
* Damage Site: Long Live The Kings, Lilliwaup Hatchery. (360) 877-6960
600 N Lilliwaup Street
P.O. Box 205
Lilliwaup, WA 98555
Attn: Joy Waltermire
* Site Location: Lots 3 & 4 of Block 47 of Lilliwaup Falls.
Travel north on SR 101 to Lilliwaup, Washington from Shelton.
Take left onto N Lilliwaup Street at head of Lilliwaup Bay of Hood
Canal. Proceed to northerly dead end of Street and turn right,
passing thru large gate and over bridge to east side of Lilliwaup
Creek. Veer right to Hatchery Site.
* Tax Parcel Nos.: 32330-51-47003
* Mason County: Sec. 19, Township 23 N, Range 03 W;
* Purpose: This document outlines damages to the Lilliwaup Creek regime
upstream from the LLTK Lilliwaup Hatchery and presents stream
restoration measures made necessary by the December 2007
Heavy-rain induced flooding.
Dear Mr. Schmidt:
Martig Engineering has reviewed and documented the flood damages to the Lilliwaup Creek
regime located between Lilliwaup Falls and the Vehicle-Bridge that provides access to the
6/19/2008
Page 2 of 16
Hatchery, Power Plant, and Residence.
The following sketches, photographs, and discussion present our findings and
recommendations.
SUMMARY:
Based upon our analysis, it is imperative that stream restoration measures be implemented
before October 15 2008, when heavy winter rains return.
If not, additional severe damages will occur to: (i) the stream regime (shade trees, spawning
beds stream-bank stability, etc,); (ii) the Vehicle-Bridge; (iii) the Historic Power Plant's
Tailrace; (iv) the Historic Residence; (v) the access road servicing both the Hatchery Water
Supply and the Penstock: (vi) the Hatchery Facilities; and (vii) the other residences located
within the downstream easterly floodplain of Lilliwaup Creek..
DECEMBER 2007 STORM DISASTER:
Rapid runoff from unprecedented rainfall created conditions, within the very steeply sloping
portions of the Lilliwaup Creek watershed, that caused massive landslides of formerly stable
steep slopes.
This rapid, high-volume runoff carried the slides' sands, gravels, cobbles, and accompanying
forest woody debris down the very steep gradient slopes and channels within the watershed,
depositing them in the flat gradient portion of Lilliwaup Creek from the base of Lilliwaup Falls
all the way to Hood Canal.
The deepest resulting sediment deposits occurred between the pool, at the base of Lilliwaup
Falls, and the downstream nearby Vehicle-Bridge, for two reasons:
1. the source of the sediments was from both the steep upper reaches of Lilliwaup Creek
and the major Tributary that connects to the Creek at its major channel bend (the bend
where the elevated wooden Flume Structure from the Historic Power Plant spans the
natural Lilliwaup Creek channel);
2. the Lilliwaup Creek Channel is flat from the Falls to Hood Canal (and was under the
Tidal influence of the Canal before the deposits were laid), resulting in the loss of
energy required to keep the sediments moving downstream.
This Disaster is liken to the unprecedented deposits of sediment laid within the Toutle and
Cowlitz Rivers (when Mt. St. Helens erupted) that required extensive stream restoration.
The following page shows two photographs, both taken from the Historic Residence. The top
Photo #1 shows the core area between Lilliwaup Falls and the downstream Vehicle-Bridge,
before the unprecedented rainfall. The bottom Photo #2 shows the Creek regime damages that
resulted. Note the sediment deposits covering the prior grass meadow, except where the new
High-Flow Channel has been carved thru it.
6/19/2008
\ �
Page 3 0!6
Photo#1:
Photo #2
619208 .
Page 4 of 16
The following Sketch shows the prior existing natural location of Lilliwaup Creek within the
Floodplain between Lilliwaup Falls and the downstream Vehicle-Bridge.
`•,,� v
w `
u3 t D
0
r
f
V)
C
,r
if
E
6/19/2008
Page 5 of 16
The following Sketch shows the flood damaged relocation of Lilliwaup_Creek within the
Floodplain between Lilliwaup Falls and the downstream Vehicle-Bridge. Note the Photograph
locations shown in Green Numbers upon this Sketch.
I 1 1
') Y' µ+
.y
0� 1
a
J
W
til
c -R
of
4
6/19/2008
Page 6 of 16
INVESTIGATION:
The following photographs document our investigation findings and support our conclusion that
stream restoration measures are needed, before October 15, 2008, to prevent further
damage to the already damaged stream regime.
Photo #3, looking downstream, from the pool at the base of the Falls, shows the sediment filled
prior existing Creek channel that existed left of the visible right-bank shade trees. The High-
Flow Channel, carved thru the grass meadow, is to the right of the trees heading to the right
end of the visible Historic Residence.
A
�b
Photo#3:
Photographs #4 thru #9 depict the depth of the initial sediment deposits, laid between the Falls
and the Vehicle-Bridge, before the continued high flow flushed portions of the initially laid
sediment deposits to downstream resting locations. The locations and direction of each Photo
are shown on the Page 5 Sketch, using Green Numbers.
6/19/2008
Page 7 of 16
Photo #4: Photo #5:
Photo #6: Photo #7:
i
e x
N
i
x
Y
Photo #8: Photo #9:
ss
The water cascading down from the elevated wooden Tailrace Flume (shown in Photo #6) is
the flow of the major Tributary entering Lilliwaup Creek. This unnamed Tributary used to flow
under the elevated flume in a natural channel connecting to the prior existing Lilliwaup Creek
channel.
Photo #10 shows how the depth of the initially deposited sediments plugged the prior opening
6/19/2008
Page 8 of 16
under the wooden flume, where the Tributary's channel used to be located.
,51
M . M
r
+ r=
vmm
+i
r � J ATM..a• x� do-.,,' S _ . .3` 2
a U a
w
CIA.
Photo #10:
The top portion of Photo #11 shows the Tributary's newly created cobble channel upgradient of
the wooden flume. This portion of the Tributary's channel remains on top of the initially laid
sediment deposits that remain wedged against the wooden flume. The Tributary's flow has
eroded the channel thru the deposited sediments on the downgradient side of the flume, where
the flow presently cascades over the top of the flume and along its downstream side.
6/19/2008
Page 9 of 16
x
er
r
y�
i
--.. AIDa
a
Photo #11'.
The major Tributary, shown in the above Photos #10 & #11, provides the Primary Water
Supply to the Hatchery. The sediments remaining wedged against the upstream side of the
wooden flume, where the Tributary's new channel now exists, actually create a sediment plug
that has almost completely closed the 60-inch Diameter Culvert that conveys the major
Tributary flow under the access road servicing both the Hatchery Water Supply Intake
Structure and the Historic Power Plant Penstock Headworks.
The following Photo #12 shows the plugged condition of this important 60-inch Diameter
Culvert. You can barely make out the top of the culvert (appearing as a silver crescent) just
below the large rock. Note the brown log protruding from this culvert outlet.
6/19/2008
Page 10 of 16
rv,
? ,
ii
Photo #12:
A Tailrace was installed to return the water, routed thru the Historic Power Plant, back to
Lilliwaup Creek at the pool located at the base of Lilliwaup Falls. This was to insure that the
streamflow within the Creek channel, between the Falls and the Historic Power Plant,
remained unchanged by the flow diverted thru the plant.
This Tailrace consists of an Elevated Wooden Flume and an Open Concrete Lined Channel.
Portions of this Tailrace are visible in the above Photographs. The following Photos #13, #14,
& #15 show how this Tailrace remains filled with some of the initially laid sediments deposited
between the Falls and the Vehicle-Bridge.
Photo #13 shows the sediment filled Tailrace looking at its discharge location into the Falls'
6/19/2008
Page 11 of 16
pool. Photo #14 is looking toward the Elevated Wooden Flume where the High-Flow Channel,
carved thru the grass meadow, begins.
k
x �
k-
CIE
BII��
Photo:#13:
6/19/2008
IPage 12 of 16
g,.
s a,
S�
t,°5
4
� s
p..
Photo #14:
. w .
Photograph #15, below, shows the inlet to the Elevated Wooden Flume filled with remaining
sediment, at the location where the major Tributary flow now cascades over the flume and
down along the downstream side of the flume (as shown in Photos #10 & #11 above).
6/19/2008
iPage 13 of 16
v _ .
14
IJ
B o
e
w�: r
r
Photo #15:
The east abutment of the subject Vehicle-Bridge across Lilliwaup Creek was severely attacked
by the sediment laden flood flow and the car-bridge just downstream from the Hatchery was
swept away.
The following Photographs #16 & #17 show the concentrated erosion of the east floodplain
bank at the east Vehicle-Bridge abutment. Photo #17 shows the large fractured rock that was
placed during the flood (with an Emergency Permit). This armament saved the Abutment, the
Vehicle Bridge, and the shade trees. However, it is apparent that similar rock should be added
to complete the armament between the upstream Concrete Bulkhead and the east Bridge-
Abutment Concrete Wing-Wall.
6/19/2008
Page 14 of 16
AS
., {
Photo #16:
W�..
x ^"
'I" � ,
t
r'
4k,
kv:d i�T 'ren8=P s9 � .'gym +i
ow
,KA
Photo #17: (immediately downstream of, and overlapping, Photo #16, above)
NECESSARY STREAM RESTORATION
Purpose: The purpose of the Stream Restoration is to:
1 . Restore the lost Creek Spawning areas;
2. Save the Creek Shade Trees from dying and/or washout;
3. Save the Vehicle-Bridge from washout (like the washout of the Car-Bridge downstream
from the Hatchery);
6/19/2008
Page 15 of 16
4. Remove the sediment from the mostly plugged 60-inch Culvert to restore its flow
capacity;
5. Restore the major Tributary stream channel from the 60-inch Culvert to its intersection
with Lilliwaup Creek, under the wooded flume;
6. Save the Access Road that services the Hatchery Water Supply Intake Structure & the
Historic Power Plant Penstock Headworks;
7. Prevent further damage to the Historic Power Plant Tailrace & restore it;
8. Prevent further washout of the Floodplain bank abutting the Historic Residence;
9. Reduce further damages to the LLTK Lilliwaup Hatchery located immediately
downstream.
Work Scope: The following list describes the restoration work recommended:
1. Remove the deep piles of remaining sediment shown in Photographs #4 thru #9,
disposing of as much of the removed sediment offsite if/as possible, with the remainder
being used to restore (and raise the elevation of) the prior existing grass meadow;
2. Remove remaining dry sediments from the prior existing Lilliwaup Creek channel zone,
without entering or disturbing the present wetted/flowing streambed;
3. Remove the smothering sediment from around the prior streambank Shade Trees;
4. Remove the sediments from the 60-inch culvert;
5. Remove the sediments stacked up against the wooden flume to restore the major
Tributary stream channel under the flume where it enters Lilliwaup Creek;
6. Repair the damage to the prior existing concrete bulkheads along the frontage of the
Historic Residence;
7. Complete the placement of Large Fractured Stones along the easterly edge of the
Creek Floodplain, between the existing upstream Concrete Bulkhead and the existing
Vehicle-Bridge Abutment Concrete Wing-Wall (for location, see Photos #16 & #17).
LLTK LILLIWAUP HATCHERY DAMAGES
The LLTK Hatchery was also severely damaged by the same December 2007 event.
Investigations have led to the following repairs necessary to restore and maintain continued
operation of the hatchery.
Work Scope: The minimum recommended repairs and improvements include the following:
1. Reposition the Tank Farm tanks that were displaced by the flood waters, and examine
connecting piping, repairing any breaks discovered;
2. Restore the Settling/Treatment Pond and Install a New Overflow Standpipe where the
Tank Drain System discharges into the Settling-Pond;
3. Install a New high-Creek-flow Deflector-Bumper-Berm along the westerly edge of the
Hatchery Improvements, using the sediments deposited during the Flood Event;
4. Install a New Structural Support for the primary Hatchery water supply Intake Screen;
5. Install a New Well-Screen Intake Manifold (within the bottom of the existing primary
Hatchery water Supply Pond located behind the Concrete Dam) and connect it in
6/19/2008
I
Page 16 of 16
parallel with the Newly reinforced existing screened intake system;
6. Install a New Access Road to the westerly edge of the Supply Pond for the easy/regular
removal of accumulated sediments from the pond.
7. Install a New EMERGENCY Backup Water Supply System, the employs three
components:
a. a New Catchment/Intake and gravity piping system to deliver the Spring-Flow
that drains thru the ditch along the west side of the Hatchery site;
b. a New Catchment/Intake and gravity piping system to deliver the Spring-Flow
that drains thru the wetland along the east side of the Hatchery site;
C. New Electric Submersible-Pump positioned (upon a protected, anchored, float)
within the floodplain for supplying floodwater.
8. Purchase, install, and wire-in an EMERGENCY Electric Generator System (installed
above the highest flood level) for running the new submersible pump and supplying
power to the other necessary emergency equipment.
6/19/2008