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From: "Liz Stenning" <liz@earthcorps.org>
To: "Christian Munter" <Cmunter@ci.renton.wa.us>
Date: 10/15/03 11 A0AM
Subject: RE: Contract Budgets
Christian,
Thanks for looking into this. No, we won't go over budget with these two contracts. I will check in with you
about the Lower Cedar within the next two weeks so you can know our progress. But, we won't go over
budget. It's ok to push the planting and maintenance contracts into next year. I will work on getting those
together so you can get them processed. I am checking to see if live willow staking can happen in
January or if that is too late.
You should receive the invoice for Elliot and Maplewood in the next few days.
I'll be in touch in the next couple of weeks to set up a site visit with you for the Mouth of the Cedar
Talk to you soon.
Liz Stenning
Field Program Coordinator
6310 NE 74th Street, Suite 201 E
Seattle, WA 98115
(206) 322-9296 X 207
-----Original Message -----
From: Christian Munter[mailto:Cmunter@ci.renton.wa.us]
Sent: Wednesday, October 15, 2003 10:18 AM
To: Liz Stenning
Subject: Contract Budgets
Liz,
I'm going over the budgets to see what we'll have at the end of the
year. Do you foresee EarthCorps going over budget for either of our two
contracts? I wouldn't think so since you can merely stop working when
you reach the magic number. But I have to make sure you don't go over
because my Cedar River budget is very tight and there's literally no
room for play. This also means no planting for this year unfortunately.
I definately want to work on the planting and maintenance contracts for
next year though so we can get into your schedules at the appropriate
times.
Thanks.
Chris
Christian D. Munter, P.E.
Surface Water Utility
City of Renton
1055 S. Grady Way - 5th Floor
Renton WA 98055
Phone: 425-430-7205
From: "Liz Stenning" <liz@earthcorps.org>
To: "Christian Munter" <Cmunter@ci.renton.wa.us>
Date: 9/19/03 4:05PM
Subject: RE: Invasive Removal
Chris,
had a crew at the Maplewood site this week doing invasive removal. The crew was able to get through
the whole site, but left about 8 garbage bags on site with knotweed since their vehicle wasn't able to
transport it all. I will at the site Monday morning to inspect their work and pick up the bags. From there
will get the crew started at the Elliot site on Monday cutting down knotweed. The tentative schedule is for
the crew to be at the Elliot site next week and start at the Lower Cedar site at the end of the week or the
following week. Are you interested in coming out any of those days to meet the crew or look at the work?
I will be off next Thursday 9/25-Monday 9/29.
Have a great weekend.
Liz Stenning
Field Program Coordinator
6310 NE 74th Street, Suite 201 E
Seattle, WA 98115
(206) 322-9296 X 207
-----Original Message -----
From: Christian Munter[mailto:Cmunter@ci.renton.wa.us]
Sent: Friday, September 19, 2003 3:22 PM
To: Liz Stenning
Subject: RE: Invasive Removal
Liz,
Do you have a schedule for work next week? Any crew's out today?
Thanks and have a good weekend.
Chris
Christian D. Munter, P.E.
Surface Water Utility
City of Renton
1055 S. Grady Way - 5th Floor
Renton WA 98055
Phone: 425-430-7205
Fax: 425-430-7241
cmunter@ci.renton.wa.us
>>> "Liz Stenning" <liz@earthcorps.org> 09/04/03 01:22PM >>>
Hello Chris,
I have crews scheduled to work starting the week of September 15th. I
had hoped to get crews started sooner, but they were booked out several
weeks in advance. Our crews have gotten busy due to the end of the
summer flurry of ending construction projects. It was not my intention
e_ mQ;1tc( � ?1-/ Ct.rc c*- -tc-
`/-/7--o3
2003 CEDAR RIVER RIPARIAN VEGETATION
Elliot Rearing/Spawning Side -Channel
Distance
Segment (ft.) Width (ft.) Area (W) Objectives Priority Plants Required
Plant
Plant type Quantity Comments
rees: Western re
cedar, Red alder,
Cottonwood, Oregon
ash, Sitka spruce,
Western hemlock.
Shrubs: Red -osier
Remove
dogwood, Salmonberry,
It is imperative to
invasives.
Pacific ninebark,
protect plantings from
Replace
Pacific crabapple,
deer and beaver
1. Upstream end
native
Oregon grape.
Trees: 150
grazing. Width
of side -channel (at
planting.,,.
Emergent: Oregon
Shrubs and
measurement and
riprap weir) to road
Stabilizc
grape, Salal, rushes,
Emergents:
number of plantings is
crossing.
30
16500
bank.
I
ferns.
1, 2, 5 gallon units
360
for both banks.
Trees: Western re
cedar, Red alder,
Cottonwood, Oregon
2. From road
ash, Sitka spruce,
Several large woody
crossing to first
Western hemlock.
debris pieces take up
downstream bend
Remove
Shrubs: Red -osier
bank space, and limit
(-90 degrees),
invasives.
dogwood, Salmonberry,
Trees: 50
area for planting. It is
about 150 feet
Plant native
Pacific ninebark,
Shrubs and
imperative to protect
downstream of
trees and
Pacific crabapple,
Emergents:
plantings from deer and
road crossing.
150
15
2250
Ishrubs.
1
Oregon grape.
I. 2. 5 gallon units
100
beaver grazing.
3. From
confluence of
Trees: Western red
small tributary to
cedar, Red alder,
Elliot Side-
Cottonwood, Oregon
Channel (at about
ash, Sitka spruce,
It is imperative to
the mid -point of
Western hemlock.
protect plantings from
the side -channel)
Remove
Shrubs: Red -osier
deer and beaver
to 120 ffet
invasives.
dogwood, Salmonberry,
grazing. Width
downstream, or
Plant native
Pacific ninebark,
Trees: 60
measurement and
first bend (-90
trees and
Pacific crabapple,
Shrubs:
number of plantings is
de rees)
120
20
1 2400
Ishrubs.
11
Oregon grape.
11, 2, 5 gallon units
1120
1 for both banks.
2003 CEDAR RIVER RIPARIAN VEGETATION
Maplewood Revetment
Distance
Segment (ft.) Width (ft.) Area (ft2) Objectives Priority Plants Required Plant type Plant Quantity Comments
Conifers for
replacement planting
at top of bank -
Western red cedar,
Western hemlock,
and/or Sitka spruce.
28 Western red
Shrubs - Red -osier
cedar, Western
Remove invasive species.
dogwood, Red-
hemlock, and/or
1. At the eastern
Replace dead conifers on upper
flowering currant,
Sitka spruce.
Deer grazing has
edge of the
bank. Plant shrubs - especially
Pacific ninebark
600 shrubs - Red
caused shrub
Maplewood Golf
Red -osier dogwood, Red-
and/or Twinberry -
osier dogwood,
plantings on slope to
Course, adjacent to
flowering currant, Pacific
to be planted on
Red -flowering
fail. Any shrub or
the Cedar river, 300
ninebark, Twinberry on the
slope between
currant, Pacific
deciduous plantings
feet upstream of the
slope between the conifers at
conifers on bank top
1, 2, 5
ninebark and/or
must be protected
golf -cart bridge.
400
1 60
1 24000
Ithe top and the water's edge.
I 1
I and water's edge.
I gallon units
Twinberry.
from deer grazing.
2003 CEDAR RIVER RIPARIAN VEGETATION
Lower Cedar River, right bank.
Distance Width Area Plants Plant
Sevment (ft.) (ft.) (ft') Obiectives Prioritv Reauired Plant tyne Ouantitv Comments
We'd like to remove invasives that threaten park plantings, and are
considered noxious. This area is difficult to access and may present
Removal of invasive plants on very steep, narrow bank
safety problems because of very steep bank and deep water. We'd
I. Mouth to 30 ft.
between landscaped park property and water. Bank
Willow,
like to remove invasives with minimal bank erosion/sluffing, and
upstream (south) of'
stabilization. Replacement with native plants
Red -osier
eventually plant it with native plants that are acceptable to City of
boat launch.
660
to
6600
acceptable to City of Renton Parks Dept..
2
dogwood
Staking
220
Renton Parks De rtrnent;
Variety o
is segment as areas with a mature tree zone and a more
shrub and
gradually -sloped bank, so shading and bank stability have kept
2. Continuing
tree species
down invasives. Going south (upstream) there are some areas with
south, from 30 ft.
per
Staking;
steeper banks, and patches of Japanese knotweed. Invasive
upstream of boat
Spot removal of invasive plants. Spot replacement
restoration
1, 2, 5
occurrence is spotty; after removal of invasives, we're interested in
launch to beginning
with native plants acceptable to City of Renton Parks
team's
gallon
planting those areas with native plants acceptable to the City of
of floodwall.
107�
10
20750
1 Dept.
2
1 i ud ement
units.
220
lRenton Parks De t.
Varietyo
e i e o remove invasives that threaten park plantings, and are
shrub and
considered noxious. This area is difficult to access and may present
Removal of invasive plants between floodwall and
tree species
Staking;
safety problems because of very steep bank and deep water. We'd
water. Bank stabilization. Replacement with native
per
1, 2, 5
like to remove invasives with minimal bank erosion/sluffing, and
3. Entire length of
plants acceptable to City of Renton Parks Dept., and
restoration
gallon
eventually plant it with native plants that are acceptable to City of
floodwall.
3u
0
15900
consistent with existing plant community.
2
team's
units.
275
Renton Parks De ment.
We'd li e to remove invasives that threaten park plantings, and are
considered noxious. This area is difficult to access and may present
4. From south
Removal of invasive plants on very steep, narrow bank
safety problems because of very steep bank and deep water. We'd
(upstream) end of
between landscaped park property and water. Bank
Willow,
like to remove invasives with minimal bank erosion/sluffing, and
floodwall to South
stabilization. Replacement with native plants
Red -osier
eventually plant it with native plants that are acceptable to City of
Boeing bridge.
490
10
4900
acceptable to City of Renton Parks Dept..
2
dogwood
Staking
170
Renton Parks Department.
2003 CEDAR RIVER RIPARIAN VEGETATION
Lower Cedar River, left bank.
Distauec Width Area Plant
Segment (fl.) (ft.) (ft2l Obiectives Prioritv Plants Required Plant lvne Ouantitv Comments
1. Immediately north
(downstream) of
South Boeing bridge
to large complex of
willow trees, just
south (upstream) of
WDFW fisheries
monitoring station.
150
40
6000
Removal of invasives.
Replacement with native
plants, including emergent,
shrub, and tree species.
Possibly soil
supplementation and use of
groundcover to prevent re-
lestablishment of invasives.
I
Trees: Red alder, Oregon ash,
Cottonwood, Western red
cedar, Western hemlock,
Sitka spruce. Shrubs: Red -
osier dogwood, Pacific
ninebark, Red -flowering
currant. Emergent: Salal,
Oregon grape, ferns.
1, 2, 5
gallon units
100 trees,
500 shrub
or emergent.
Bank has a bluff -like
morphology, this area has
already had invasive removal
done once by Earthcorps.
2. Continuing north,
the next segment
begins 300 feet north
(downstream) of the
willow complex that
is at the end of
Removal of invasives.
Trees: Red alder, Oregon ash,
Segment I (above).
Replacement with native
Cottonwood, Western red
Bank has a bluff -like
The floodwall angles
plants, including emergent,
cedar, Western hemlock,
morphology, this area has
west, the bank is
shrub, and tree species.
Sitka spruce. Shrubs: Red-
already had invasive removal
wider, and the
Possibly soil
osier dogwood, Pacific
done once by Earthcorps.
floodwall is replaced
supplementation and use of
ninebark, Red -flowering
300 trees,
Some plantings already
by a chain -link
groundcover to prevent re-
currant. Emergent: Salal,
I, 2, 5
1000 shrub
established here, especially
fence.
600
0
18000
establishment of invasives.
1
Oregon grape, ferns.
gallon units
or emergent.
alder, salal, cedar.
Bank oes no ave a u
form - it's just above the
water, and is very narrow.
Salal and Oregon grape
465 willows
plantings are spaced about I
stakings,
meter apart, and most have
Replacement of failed
planted
been successful. There are
willow stakings. Removal
every two
also a few alders and
of invasives to allow for
feet. 300
cottonwoods. There were
3. Continuing north
Salal and Oregon grape on
Sala] and/or
hundreds of willow stakings
(downstream), the
bank to flourish. Additional
Oregon
in this segment, but were
floodwall begins
Salal and Oregon grape
grape
planted toofar waterward.
again, and the bank
plantings on bank. Possibly
plantings to
The focus in this segment is
narrows. This
soil supplementation and
supplement
to replace all willow stakings,
segment extends to
use of groundcover to
Staking;
established
and to make additional Salal
the end of the
prevent re-establishment of
1, 2 gallon
plants on
and Oregon grape plantings
floodwall.
1 930
1 8
1 7440 linvasives.
units. lbank.
Ion the bank.
2003 CEDAR RIVER RIPARIAN VEGETATION
Lower Cedar River, left bank from South Boeing Bridge to Logan Avenue.
Distance Width Area
Segment (ft.) (ft.) W)
Plants
Plant
Objectives Priority Required Plant type Quantity Comments
Bank here has bluff -like
morphology. Alders
planted are doing very
well; Salal and Oregon
Removal of invasives.
grape have had some
Replacement with
success. Focus in this
native plants, including
segment is to remove
emergent, shrub, and
invasives on bluff, and
tree species. Possibly
Alder, Salal,
make additional plantings
1. Going south
soil supplementation
Oregon grape,
140 Alder or
of Alder, Sala], Oregon
(upstream) from
and use of groundcover
possibly
Cottonwood,
grape between established
South Boeing
to prevent re-
Cottonwood,
1, 2, 5
290 Salal
plantings. Cottonwood
Bridge to Logan
establishment of
Red -osier
gallon
and/or Oregon
and Red -osier dogwood
Avenue Bridge.
1735
12
20820
invasives.
2
dogwood.
units.
grape.
would also work well.
City of Renton -Cedar River Riparian Vegetation Scope of Work -
April 2003
C- II
� 1+
Proposal for: Christian Munter
Prepared by EarthCorps
6310 NE 74th St, suite 201E
Maplewood Revetment
Seattle, WA 98115
206.322.9296 206.322.9312 fax
Date: April 28, 2003
Work Item #
Width
(see attached Unit Cost per
At the eastern edge of the
71WU=11K=1V111U"zV*i1W�_ NIL
Distance (ft.)
(ft.)
Area (sq.ft.)
spreadsheet) sq. ft. Subtotals
Assumptions/Notes
Remove invasive species.
Maplewood Golf Course,
Replace dead conifers on
adjacent to the Cedar
upper bank. Plant shrubs on
River, 300 feet upstream of
the slope between the conifers
the golf cart bridge.
at the top and the water's
400
60
24000
edge.
Plantin
7001 $0.20 $4,800.00
Includes deer protection tubes
Subtotal
$4,800.00
Field Project Management & Supervision (7% of Total) N/A
Project Administration (10% of Total) $480.00
Materials Handling Fee (10% of Total)
N/A
Mileage
_
N/A
TOTAL FEE
$5,280.00
FallPlant1.xls EarthCorps 05/02/2003
City of Renton- Cedar River Riparian Vegetation Scope of Work- April 2003
Proposal for: Christian Munter _
Prepared by EarthCorps
Elliot Rearing/Spawning Side Channel
1206.322.9296
6310 NE 74th St, Suite 201 E
Seattle, WA 98115
206.322.9312fax
Date April 28, 2003
Work Item #
Width (see attached Unit Cost per
Distance (ft.) (ft.) Area (sq.ft.) spreadsheet) sq. ft. Subtotals
Assumptions/Notes
Remove invasives. Replace native
plantings. Stabilize bank. Width
Upstream end of side -channel (at
measurement and number of
Segment 1 riprap weir) to road crossing. 550 30 16500
plantings is for both banks.
Includes deer protection tubes.
Planting 710 $0.63 $10,395.00
Subtotal
$10,395.00
From road crossing to first
Remove invasives. Replace
downstream bend (- 90 degrees),
native plantings. Stabilize bank.
about 150 feet downstream of road
Width measurement and number
Segment 2 1crossing.
67
15
1005
of plantings is for both banks.
720
$1.25
$1,256.25
Includes deer protection tubes.
Planting
Subtotal
$1,256.25
From confluence of small tributary to
Elliot Side -Channel (at about the
Remove invasives. Replace
mid -point of the side -channel) to
native plantings. Stabilize bank.
120 ffet downstream, or first bend
Width measurement and number
Segment_3 (-90 degrees) 58 20 1160
of plantings is for both banks.
Planting 720
$1.25
$1,450.00
Includes deer protection tubes.
Subtotal
$1,450.00
Subtotal of subtotals
$13,101.25
Field Project Management & Supervision (7% of Total)
N/A
$1,310.13
Project Administration (10% of Total)
Materials Handling Fee (10% of Total)
N/A
Mileage
N/A
TOTAL FEE
$14,411.38
FallPlant1.xls EarthCorps 05/02/2003
City of Renton -Cedar River Riparian Vegetation Scope of Work -
April 2003
Proposal for: Christian
Munter
Prepared by EarthCorps
Lower Cedar River
6310 NE 74th St, Suite 201 E
Seattle, WA 96115
206.322.9296 206.322.9312 fax
Date: April 28,
2003
Work Item #
Width
Distance (ft.) (ft.)
Area (sq.ft.)
see attached
(spreadsheet)
Unit Cost per
sq. ft.
(Subtotals
Assumptions/Notes: Paul
Conrecode
Assumptions/Notes:
EarthCorps
Immediately north (downstream) of
o1 s.
South Boeing bridge to large
Replace t with at
Replacement with native plants,
Prior Inasive Removal,
complex of willow trees, just south
including emergent, shrub, and
Bank Stabilization, and
(upstream) of WDFW fisheries
tree species. Possibly soil
Planting by EC. Poor
Left Bank
Segment 1
9
monitoring station. 150 40
6000
supplementation and use -
groundcover to prevent re
soil, no tree canopy.
Planting
710
$0.631
$3,780.00
Subtotal
$3,780.00
Continuing north, the next segment
begins 300 feet north (downstream)
Removal of invasives.
of the willow complex that is at the
Replacement with native plants,
Prior Inasive Removal,
end of Segment 1 (above). The
including emergent, shrub, and
Bank Stabilization, and
floodwall angles west, the bank is
tree species. Possibly soil
Planting by EC. Poor
wider, and the floodwall is replaced
supplementation and use of
soil, no tree canopy.
by a chain -link fence.
groundcover to prevent re -
S ment 2
Segment
600
Planting
30
18000
$3,600.00
establishment of invasives.
700
$0.20
Subtotal
$3,600.00
Replacement of failedwillow
Continuing north (downstream), the
stakings. Removal of invasives to
Prior willow stakings
floodwall begins again, and the
allow for Salal and Oregon grape
unsuccessful due to
bank narrows. This segment
on bank to flourish. Additional
bank heigth. Some
Segment 3
extends to the end of the floodwall.
930
8
7440
Salal and Oregon grape plantings
on bank. Possibly soil
native plantings of
groundcovers
supplementation and use of
successful.
Planting
710
$0.63 $4.687.20
oroundrover to prevent re -
Subtotal
$4,687.20
Subtotal
$12,067.20
Field Project Management & Supervision (7% of Total)
N/A
Project Administration (10% of Total)
$1,206.72
N/A
N/A
Materials Handling Fee (10% of Total)
Mileage
TOTAL FEE
$13,273.92
FalIPIant2.XIS EarthCorps 05/02/2003
EarthCorps 2003
Invasive
10%
Total
Site
Segment
Removal
Soil Prep
Planting
Elliot Channel
1
$1,650.00
$4,950.00
$10,395.00
$1,699.50
$18,694.50
2
$675.00
$675.00
$2,812.50
$416.25
$4,578.75
3
$720.00
$720.00
$3,000.00
$444.00
$4,884.00
10%
$304.5Q
$634 5t3
,6f 0.75
Total'
$
,I
17,828.25
$28,157.25
\
Invasive
10%
Total
Site
Se meat
Removal
Soil Prep
Planting
Maplewood
$2,400.00
$1,200.00
$4,800.00 /
$840.00
$9,240.00
10%
$240.00
$120.00
$480.00
Total
1
5,280.00
$9,240.00
Invasive
10%
Total
Site
Segment
Removal
Soil Prep
Planting
Cedar River
1
$1,800.00
$960.00
$3,780.00
$654.00
$7,194.00
Lower Left Bank
2
$5,400.00
$2,880.00
$3,600.00
$1,188.00
$13,068.00
3
$2-,232I----$1.190.40
$4,687.2$----,,
$810.96
$8,920.56
10%
—$943.20
$503.04
,206.72
Total
$10,375.20
$5,533.44
$29,182.56
Grand Totals
$16,364.70
$13,832.94
$T6,2.17
$66,579.81
2003Work.xls
City of Renton -Cedar River Riparian Vegetation Scope of Work -
April 2003
Proposal for: Christian Munter
Prepared by EarthCorps
Lower Cedar River
-
-
6310 NE 74th St, Sufte 201E
—
Seattle, WA 98115
206.322.9296 206.322.9312fax
Date: April 28,
2003
Work Item #
Width
(see attached
Unit Cost pert,
Assumptions/Notes: Paul
Assumptions/Notes:
Distance (ft.)
(ft.)
Area (sq.ft.) spreadsheet)
sq. ft. Subtotals
Conrecode
EarthCorps
� .� �.<• �, ter,..
Immediately north (downstream) of
South Boeing bridge to large
Removal invasives.
complex of willow trees, just south
Replacement with native plants,
Prior Inasive Removal,
(upstream) of WDFW fisheries
including emergent, shrub, and
Bank Stabilization, and
Left Bank Segment 1 monitoring station.
150
40
6000
tree species. Possibly soil
supplementation and use of
Plantingb EC. Poor
y
$0.30
$11,800.00
Invasive Removal/Disposal
600
groundcover to prevent re-
soil, no tree canopy.
Soil Preparation
510
$0.16
$960.00
establishment of invasives.
710
$0.63
$3,780.0
Planting
Subtotal
$6,540.00
Continuing north, the next segment
begins 300 feet north (downstream)
of the willow complex that is at the
Removal of invasives.
end of Segment 1 (above). The
Replacement with native plants,
Prior Inasive Removal,
floodwall angles west, the bank is
including emergent, shrub, and
Bank Stabilization, and
wider, and the floodwall is replaced
tree species. Possibly soil
Planting by EC. Poor
Segment 2 by a chain -link fence.
9
600
30
18000
supplementation and use of
groundcoverto prevent re-
soil, no tree canopy.
Invasive Removal/Disposal
_
establishment of invasives.
600
$0.30
$5,400.0
$0.16
$2,880.00
Soil Preparation
510
Planting
700
$0.20
$3,600.00
Subtotal
$11,880.00
Replacement of failed willow
Continuing north (downstream), the
stakings. Removal of invasives to
Prior willow stakings
floodwall begins again, and the
allow for Salal and Oregon grape
unsuccessful due to
bank narrows. This segment
on bank to flourish. Additional
bank heigth. Some
Segment 3
extends to the end of the floodwall.
930
81
7440
$2,232.00
Sala] and Oregon grape plantings
native plantings of
600
Invasive Removal/Disposal
510
$0.30
$0.16 $1,190.40
on bank. Possibly soil
supplementation and use of
groundcoverto prevent re -
groundcovers
successful.
Soil Pre aration
Planting
710
$0.63 $4,687.20
establishment of invasives.
u oa
Left Bank from
Removal of invasives.
South Boeing :Going south (upstream) from South
g )
Replacement with native plants,
Well established native
Bridge to Logan Boeing Bridge to Logan Avenue
e t
including emergent, shrub, and
g 9
tree/s,ntrmhrub canopy
Avenue Segment 1 Bridge.
1735
12
20820
tree species. Possibly soil
Renton Mitigation Estimate.xls EarthCorps 04/28/2003
City of Renton -Cedar River Riparian Vegetation Scope of Work -
April 2003
Invasive Removal/Disposal
1
600
$0.30
$6,246.00
supplementation and use of
groundcover to prevent re -
establishment of invasives.
invasives.
Soil Preparation
510
$0.16
$3,331.20
Planting
700
$0.20
$4,164.00
u o a
1 ,741.20
Right Bank
Segment 1
Mouth to 30 ft. upstream (south) of
boat launch.
Invasive RemovaUDis osal
660
10
6600
Removal of invasive plants on
very steep, narrow bank between
landscaped park property and
water. Bank stabilization.
Replacement with native plants
acceptable to City of Renton Parks
Dept.
Rip -rap, steep banks,
blackberry predominant.
620
$0.70
$4,620.0
Soil Preparation (includes bank
stabilization where necessary)
520
$0.45
$2,970.00
Planting
700
$0.20
$1,320.00
Subtotal
$8,910.0
Segment 2
Continuing south, from 30 ft.
upstream of boat launch to
beginning of floodwall.
2075
10
20750
Spot removal of invasive plants.
Spot replacement with native
plants acceptable to City of
Renton Parks Dept.
Good native tree
canopy, some bank
erosion, patchy
invasives.
Invasive RemovaUDis osal
610
$0.30
$6,225.00
Soil Preparation
500
$0.05
$1,037.50
Planting
700
$0.20
$4,150.0
Subtotal
$11,412.501
Segment 3
Entire length of floodwall.
530
30
15900
Removal of invasive plants
between floodwall and water.
Bank stabilization. Replacement
with native plants acceptable to
City of Renton Parks Dept., and
consistent with existing plant
community.
Dense blackberry and
knotweed patches
intermixed with native
shrubs and some alder.
Live staking along steep
banks.
Invasive RemovaUDis osal
620
$0.70
$11,130.00
Soil Preparation
510
$0.30
$4,770.00
Planting
700
$0.20
$3,186-bol
Subtotal
$19,080.0
Segment 4
From south (upstream) end of
floodwall to South Boeing bridge.
490
10
4900
$0.701
$3,430.00
Removal of invasive plants on
very steep, narrow bank between
landscaped park property and
water. Bank stabilization.
Replacement with native plants
acceptable to City of Renton Parks
Dept..
Dense blackberry and
knotweed patches. Live
staking along steep
banks.
Invasive RemovaUDis osal
620
Soil Preparation
500
$0.05
$245-00
Planting
720
$1.25 $6,125.00
u tota
Subtotal
$89,473.30
Field Project Management & Supervision (7% of Total)
Project Administration (10% of Total)
N/A
$8,947.33
N/A
_
_
Materials Handling Fee (10% of Total)
Mileage
N/A
TOTAL FEE
$98,420.63
Renton Mitigation Estimate.xls EarthCorps 04/28/2003
From: "Conrecode, Paul" <PConrecode@golder.com>
To: 'Christian Munter' <Cmunter@ci.renton.wa.us>
Date: 5/1 /03 10:53AM
Subject: RE: renton scope of work
Hi Chris,
Here's a rough prioritization of the vegetation work:
�1.) Elliot Side -Channel, segment 1
✓2.) Lower River, Left Bank, segment 1
9) Lower River, Left Bank, segment 2
4A.) Elliot Side -Channel, segment 2
5.) Elliot Side -Channel, segment 3
/6.) Maplewood
✓7.) Lower River, Left Bank, segment 3
8.) Lower River, Left Bank, S. Boeing to Logan Ave, segment 1
9.) Lower River, Right Bank, segment 3
10.) Lower River, Right Bank, segment 2
11.) Lower River, Right Bank, segment 4
12.) Lower River, Right Bank, segment 1
With $60k, it looks like we could do the first six items on the list.
Please let me know what you think. I would still like to see about
developing a volunteer team.
Paul Conrecode
Project Fisheries Biologist
Golder Associates Inc.
18300 NE Union Hill Rd., Ste 200
Redmond. WA 98052
Tel: (425)883-0777
Fax: (425)882-5498
-----Original Message -----
From: Christian Munter(mailto:Cmunter@ci.renton.wa.us]
Sent: Monday, April 28, 2003 3:40 PM
To: PConrecode@golder.com
Subject: Fwd: renton scope of work
Paul,
Attached are the cost estimates from EarthCorps based on the spread
sheets you put together. Ron and I have looked at the numbers and
think we only have about $60,000 for this years work. Would you take a
look at the spread sheet and let me know what you think is of the
highest priority. Right now we're looking at the Elliot Spawning
channel, Maplewood Revetment, and only the left bank of the Lower Cedar
River.
Thanks.
City of Renton- Cedar River Riparian Vegetation Scope of Work- April 2003
Proposal for: Christian Munter
Prepared by EarthCorps
Elliot Rearing/Spawning Side Channel
6310 NE 74tn St, suite 201E
Seattle, WA 98115
206.322.9296 206.322.9312 fax
Date: April 28, 2003
Work Item #
Width (see attached Unit Cost per
Distance (ft.) (ft.) Area (sq.ft.) spreadsheet) sq. ft. Subtotals
Assumptions/Notes
Remove invasives. Replace native
plantings. Stabilize bank. Width
Upstream end of side -channel (at
measurement and number of
Segment 1
riprap weir) to road crossing. 550 30 16500
Invasive Removal/Disposal 600 $0.10 $1,650.00
Soil Preparation (includes bank
plantings is for both banks.
stabilization where necessary) 510 $0.30 $4,950.00
Includes deer protection tubes.
Planting
710
$0.63
$10,395.00
Subtotal
$16,995.00
From road crossing to first
Remove invasives. Replace native
downstream bend (-90 degrees),
plantings. Stabilize bank. Width
about 150 feet downstream of road
measurement and number of
Segment 2
crossing.
150
15
2250
.
600
$0.30
$675.00
plantings is for both banks.
Invasive Removal/Dis osal
Soil Preparation (includes bank
stabilization where necessary)
510
$0.30
$675.00
Planting
$2,812.50
Includes deer protection tubes.
720
$1.25
Subtotal
$4,162.50
From confluence of small tributary
Remove invasives. Replace native
to Elliot Side -Channel (at about the
plantings. Stabilize bank. Width
mid -point of the side -channel) to
measurement and number of
120 ffet downstream, or first bend
plantings is for both banks.
Segment 3
(-90 degrees)
120
20
2400
600 $0.30'
$720.00
Invasive Removal/Disposal
Renton Mitigation Estimate.xls EarthCorps 04/28/2003
City of Renton- Cedar River Riparian Vegetation Scope of Work- April 2003
Soil Preparation (includes bank
stabilization where necessary)
510
$0.301 $720.00
Includes deer protection tubes.
Planting
720
$1.251
$3,000.00
Subtotal
$4,440.00
Subtotal of subtotals
Field Project Management & Supervision (7% of Total)
$25,597.50
N/A
Project Administration (10% of Total)
$2,559.75
Materials Handling Fee (10% of Total)
N/A
Mileage
N/A
ITOTAL FEE
$28,157.251
Renton Mitigation Estimate.xls EarthCorps 04/28/2003
City of Renton -Cedar River Riparian Vegetation Scope of Work -
April 2003
Proposal for: Christian Munter
Prepared by EarthCorps
Maplewood Revetment
631ONE 74th St, Suite 201E
Seattle, WA 98115
206.322.9296 206.322.9312fax
Date: April 28, 2003
Work Item #
Width
(see attached Unit Cost per'
Distance (ft.) (ft.) Area (sq.ft.)
spreadsheet) isq. ft.
Subtotals
Assumptions/Notes
At the eastern edge of the
Remove invasive species.
Maplewood Golf Course,
Replace dead conifers on
adjacent to the Cedar
upper bank. Plant shrubs on
River, 300 feet upstream of
the slope between the conifers
the golf cart bridge.
at the top and the water's
400 60 24000
edge.
Invasive Removal/Disposal
600
$0.10
$2,400.00
Soil Preparation
500
$0.05
$1,200.00
Includes soil prep.
Planting
700
$0.20
$4,800.00
Includes deer protection tubes
Subtotal
i $8,400.00
Field Project Management & Supervision (7% of Total)
N/A
$840.00
Project Administration (10% of Total)
Materials Handling Fee (10% of Total)
N/A
N/A
Mileage
TOTAL FEE
$9,240.00
Renton Mitigation Estimate.xls EarthCorps 04/28/2003
Soil Prep -Invasive Removal -Planting Bidding and Estimation Chart
UNIT COST
WORK ITEM
DESCRIPTION
UNIT
(materials and
labor
Soil Preparation
500
Sparse
Compost added per plant
sq. ft.
$ 0.05
Compost and arborist mulch around
510
Light
plants
sq. ft.
$ 0.35
Apply compost, cardboard slips when
520
Medium
needed, arborist mulch per plant
sq. ft.
$ 0.45
Full site compost, cardboard slips,
530
Heavy
arborist mulch
sq. ft.
$ 1.35
540
Heavy & Tilling
Heavy soil prep, machine tilling
sq. ft.
$ 1.55
Heavy soil prep, erosion control
550
Heavy & Bank Stabilization
fabric coir/jute)
sq. ft.
$ 1.55
Heavy soil prep, erosion control
Heavy, Bank Stabilization,
fabric (coir/jute), straw wattles/staked
560
Terracing
native wood
sq. ft.
$ 1.75
Invasive Control
600
Light
Spot removal of woody invasives
sq. ft.
$ .10-.30
Removal of patches of woody
610
Medium
invasives- light grubbing
sq. ft.
$ .30-.70
Removal of large patches of woody
invasives with no invasives present-
620
Heavy
light grubbing
sq. ft.
$ .70-1.00
Cutting and/or heavy grubbing.
Herbicide and/or fabric with few
630
Profuse
native plants present.
sq. ft.
$ 1.00-1.25
Planting
700
Sparse
45' on center, average 1 gal. plant
sq. ft.
$ 0.20
710
Light
15' on center, average 1 gal. plant
s q. ft.
$ 0.63
720
Medium
10' on center, average 1 gal. plant
ft.
$ 1.25
730
Dense
_sq.
5' on center, average 1 gal. plant
sq. ft.
$ 1.80
EARTHCORPS CONFIDENTIAL: NOT FOR RELEASE OR DISTRIBUTION. 04/28/2003
`/-/7-L-03
2003 CEDAR RIVER RIPARIAN VEGETATION
Elliot Rearing/Spawning Side -Channel
Distance
Segment (ft.) Width (ft.) Area (ft) Objectives Priority Plants Required
Plant
Plant type Quantity Comments
rees: Western re
cedar, Red alder,
Cottonwood, Oregon
ash, Sitka spruce,
Western hemlock.
Shrubs: Red -osier
Remove
dogwood, Salmonberry,
It is imperative to
invasives.
Pacific ninebark,
protect plantings from
Replace
Pacific crabapple,
deer and beaver
1. Upstream end
native
Oregon grape.
Trees: 150
grazing. Width
of side -channel (at
plantings.
Emergent: Oregon
Shrubs and
measurement and
riprap weir) to road
Stabilize
grape, Salal, rushes,
Emergents:
number of plantings is
crossing.
550
30
1 16500
bank.
I
ferns.
1, 2, 5 gallon units
360
Ifor both banks.
Trees: Western re
cedar, Red alder,
Cottonwood, Oregon
2. From road
ash, Sitka spruce,
Several large woody
crossing to first
Western hemlock.
debris pieces take up
downstream bend
Remove
Shrubs: Red -osier
bank space, and limit
(- 90 degrees),
invasives.
dogwood, Salmonberry,
Trees: 50
area for planting. It is
about 150 feet
Plant native
Pacific ninebark,
Shrubs and
imperative to protect
downstream of
trees and
Pacific crabapple,
Emergents:
plantings from deer and
road crossing.
150
15
1 2250
shrubs.
1
Oregon grape.
1, 2, 5 gallon units
100
1 beaver grazing.
3. From
confluence of
Trees: Western red
small tributary to
cedar, Red alder,
Elliot Side-
Cottonwood, Oregon
Channel (at about
ash, Sitka spruce,
It is imperative to
the mid -point of
Western hemlock.
protect plantings from
the side -channel)
Remove
Shrubs: Red -osier
deer and beaver
to 120 ffet
invasives.
dogwood, Salmonberry,
grazing. Width
downstream, or
Plant native
Pacific ninebark,
Trees: 60
measurement and
first bend (-90
trees and
Pacific crabapple,
Shrubs:
number of plantings is
de rees)
1 120
1 20
1 2400
Ishrubs,
1 I
Oregon grape.
11, 2, 5 gallon units
1120
Ifor both banks.
2003 CEDAR RIVER RIPARIAN VEGETATION
Maplewood Revetment
Distance
Seement (ft.) Width (ft.) Area (fe) Obiectives Prioritv Plants Required Plant tvve Plant Ouantity Comments
Conifers for
replacement planting
at top of bank -
Western red cedar,
Western hemlock,
and/or Sitka spruce.
28 Western red
Shrubs - Red -osier
cedar, Western
Remove invasive species.
dogwood, Red-
hemlock, and/or
1. At the eastern
Replace dead conifers on upper
flowering currant,
Sitka spruce.
Deer grazing has
edge of the
bank. Plant shrubs - especially
Pacific ninebark
600 shrubs - Red
caused shrub
Maplewood Golf
Red -osier dogwood, Red-
and/or Twinberry -
osier dogwood,
plantings on slope to
Course, adjacent to
flowering currant, Pacific
to be planted on
Red -flowering
fail. Any shrub or
the Cedar river, 300
ninebark, Twinberry on the
slope between
currant, Pacific
deciduous plantings
feet upstream of the
slope between the conifers at
conifers on bank top
1, 2, 5
ninebark and/or
must be protected
golf -cart bridge.
400
60
24000
the top and the water's edge.
I 1
land water's edge.
Igallon units
I Twinberry.
I from deer grazing.
2003 CEDAR RIVER RIPARIAN VEGETATION
Lower Cedar River, left bank.
Distance Width Area Plant
Segment (ft.) (ft.) (ft 2) Objectives Priority Plants Required Plant type Quantity Comments
1. Immediately north
(downstream) of
South Boeing bridge
to large complex of
willow trees, just
south (upstream) of
WDFW fisheries
monitoring station.
150
40
6000
Removal of invasives.
Replacement with native
plants, including emergent,
shrub, and tree species.
Possibly soil
supplementation and use of
groundcover to prevent re-
establishment of invasives.
1
Trees: Red alder, Oregon ash,
Cottonwood, Western red
cedar, Western hemlock,
Sitka spruce. Shrubs: Red -
osier dogwood, Pacific
ninebark, Red -flowering
currant. Emergent: Salal,
Oregon grape, ferns.
1, 2, 5
gallon units
100 trees,
500 shrub
or emergent.
Bank has a bluff -like
morphology, this area has
already had invasive removal
done once by Earthcor s.
2. Continuing north,
the next segment
begins 300 feet north
(downstream) of the
willow complex that
is at the end of
Removal of invasives.
Trees: Red alder, Oregon ash,
Segment 1 (above).
Replacement with native
Cottonwood, Western red
Bank has a bluff -like
The floodwall angles
plants, including emergent,
cedar, Western hemlock,
morphology, this area has
west, the bank is
shrub, and tree species.
Sitka spruce. Shrubs: Red-
already had invasive removal
wider, and the
Possibly soil
osier dogwood, Pacific
done once by Earthcorps.
floodwall is replaced
supplementation and use of
ninebark, Red -flowering
300 trees,
Some plantings already
by a chain -link
groundcover to prevent re-
currant. Emergent: Salal,
1, 2, 5
1000 shrub
established here, especially
fence.
600
30
18000
establishment of invasives.
I
Oregon grape, ferns.
gallon units
or emergent.
alder, salal, cedar.
lJanK does not have a bluff
form - it's just above the
water, and is very narrow.
Salal and Oregon grape
465 willows
plantings are spaced about I
stakings,
meter apart, and most have
Replacement of failed
planted
been successful. There are
willow stakings. Removal
every two
also a few alders and
of invasives to allow for
feet. 300
cottonwoods. There were
3. Continuing north
Salal and Oregon grape on
Sala] and/or
hundreds of willow stakings
(downstream), the
bank to flourish. Additional
Oregon
in this segment, but were
floodwall begins
Salal and Oregon grape
grape
planted too far waterward.
again, and the bank
plantings on bank. Possibly
plantings to
The focus in this segment is
narrows. This
soil supplementation and
supplement
to replace all willow stakings,
segment extends to
use of groundcover to
Staking;
established
and to make additional Salal
the end of the
prevent re-establishment of
1, 2 gallon
plants on
and Oregon grape plantings
floodwall.
1 930
1 8
1 7440
1 invasives.
1 2
1 lunits.
I bank.
Ion the bank.
2003 CEDAR RIVER RIPARIAN VEGETATION
Lower Cedar River, left bank from South Boeing Bridge to Logan Avenue.
Distance Width Area
Segment (ft.) (ft.) W)
Plants
Plant
Objectives Priority Required Plant type Quantity Comments
Bank here has bluff -like
morphology. Alders
planted are doing very
well; Salal and Oregon
Removal of invasives.
grape have had some
Replacement with
success. Focus in this
native plants, including
segment is to remove
emergent, shrub, and
invasives on bluff, and
tree species. Possibly
Alder, Sala],
make additional plantings
1. Going south
soil supplementation
Oregon grape,
140 Alder or
of Alder, Salal, Oregon
(upstream) from
and use of groundcover
possibly
Cottonwood,
grape between established
South Boeing
to prevent re-
Cottonwood,
1, 2, 5
290 Salal
plantings. Cottonwood
Bridge to Logan
establishment of
Red -osier
gallon
and/or Oregon
and Red -osier dogwood
Avenue Bridge.
1735
12
20820
invasives.
2
dogwood.
units.
grape.
would also work well.
2003 CEDAR RIVER RIPARIAN VEGETATION
Lower Cedar River, right bank.
Distance Width Area Plants Plant
Sepment (ft.) (ft.) W) 0hiectives Priority Renuired Plant tvne Onantity Cnmments
Welike to remove invasives that threaten park plantings, and are
considered noxious. This area is difficult to access and may present
Removal of invasive plants on very steep, narrow bank
safety problems because of very steep bank and deep water. We'd
1. Mouth to 30 ft.
between landscaped park property and water. Bank
Willow,
like to remove invasives with minimal bank erosion/sluffing, and
upstream (south) of
stabilization. Replacement with native plants
Red -osier
eventually plant it with native plants that are acceptable to City of
boat launch.
660
10
6600
acceptable to City of Renton Parks Dept..
2
Staking220
Renton ParksDeart.d
nwi
y
s segment as t a mature tree zone and a more
shrub and
gradually -sloped bank, so shading and bank stability have kept
2. Continuing
tree species
down invasives. Going south (upstream) there are some areas with
south, from 30 ft.
per
Staking;
steeper banks, and patches of Japanese knotweed. Invasive
upstream of boat
Spot removal of invasive plants. Spot replacement
restoration
1, 2, 5
occurrence is spotty; after removal of invasives, we're interested in
launch to beginning
with native plants acceptable to City of Renton Parks
team's
gallon
planting those areas with native plants acceptable to the City of
offloodwall.
2075
1 10
20750
Dept.
2
hudgement
units.
220
1 Renton Parks De t.
variety o
e i e o remove invasives mat threaten park plantings, and are
shrub and
considered noxious. This area is difficult to access and may present
Removal of invasive plants between floodwall and
tree species
Staking;
safety problems because of very steep bank and deep water. We'd
water. Bank stabilization. Replacement with native
per
I, 2, 5
like to remove invasives with minimal bank erosion/sluffing, and
3. Entire length of
plants acceptable to City of Renton Parks Dept., and
restoration
gallon
eventually plant it with native plants that are acceptable to City of
floodwall.
,0
0
15900
consistent with existing plant community.
2
team's
units.
275
Renton Parks De ent.
We'd like to remove mvasives that threaten park plantings, and are
considered noxious. This area is difficult to access and may present
4. From south
Removal of invasive plants on very steep, narrow bank
safety problems because of very steep bank and deep water. We'd
(upstream) end of
between landscaped park property and water. Bank
Willow,
like to remove invasives with minimal bank emsion/slufftng, and
floodwall to South
stabilization. Replacement with native plants
Red -osier
eventually plant it with native plants that are acceptable to City of
Boeing bridge.
490
10
4900
acceptable to City of Renton Parks Dept..
2
dogwood
Staking
170
Renton Parks Department.
From: "Liz Stenning" <liz@earthcorps.org>
To: "Christian Munter" <Cmunter@ci.renton.wa.us>
Date: 5/5/03 5:15PM
Subject: new spreadsheets
Chris,
I have revised the spreadsheets to show a project management fee.
Here is our business license number. 601459107
We will be renewing the insurance this week and it should be processed next week.
Will we be starting up a contract for the right bank as well or do we need to wait?
Let me know if you have any questions or concerns.
Liz Stenning
Field Program Coordinator
6310 NE 74th Street, Suite 201 E
Seattle, WA 98115
(206) 322-9296 X 207
From:
Christian Munter
To:
Stenning, Liz
Date:
5/2/03 9:18AM
Subject:
2003 Contracts
Liz,
Sorry it's taking a while to get this back to you but with the budget/contract constraints, sorting and
retasking was required.
What I have in mind is essentially 4 contracts to stay under our $20,000 limit. Two for invasive
removal/soil prep. and two for planting. The two for invasive removal and soil prep. will be for Elliot
Channel/Maplewood Revetment and Lower Cedar River Left Bank accordingly. The work on these can
start as soon as we get the insurance forms worked out and the contracts signed ..... 2 to 3 weeks
hopefullyl. The planting contracts will be set up the same way and we will work through those in the Fall
when planting time would be more appropriate.
Attached are the Invasive Removal/Soil Prep. scopes of work for your approval. I simply modified the
ones you sent me. Let me know if they are ok.
Also attached is the Insurance Information Pack. Have that filled out for each contract and send back to
me with the Certificates as soon as possible so we can get that out of the way.
Provided the scopes of work are ok with you, I will be working on the contracts.
If you have a City Bus License No., would you let me know what that is.
Let me know if you have any questions.
Thanks.
Chris
Christian D. Munter, P.E.
Surface Water Utility
City of Renton
1055 S. Grady Way - 5th Floor
Renton WA 98055
Phone: 425-430-7205
Fax: 425-430-7241
cmunter@ci.renton.wa.us
>>> "Liz Stenning" <liz@earthcorps.org> 04/28/03 02:26PM >>>
Chris,
Here are the cost estimates for each section. I have included the cost estimation chart so you can see
how we determined the costs for each area.
Let me know if you have trouble receiving the documents.
but feel free to email of call me tomorrow to discuss further
Liz Stenning
Field Program Coordinator
6310 NE 74th Street, Suite 201E
Seattle, WA 98115
(206) 322-9296 X 207
I will be out of the office for the rest of the day,
CC: pconrecode@golder.com; Straka, Ronald
From: Christian Munter
To: Flatley, Terrence
Date: 4/18/03 8:24AM
Subject: Cedar River 205 Project Vegetation Mitigation
Terrence,
The City is going to try and work with EarthCorps again to do invasive removal and planting as part of the
mitigation work along the Cedar River. I would like to start coordinating with you the work along the river
in the park area so things will run smoothly for all parties.
Attached is a spreadsheet of the proposed work. I expect EarthCorps to give me some estimates of times
and costs by early next week. I also expect some plans from the Consultant describing visually what work
will occur where. As soon as I get those maybe we can sit down and go over them or meet at the site with
EarthCorps and the Consultant.
Things I want to coordinate with the Parks Deptartment include:
Parks concernts of what to remove and what to plant at particular locations.
Spray of herbicides by Parks and EarthCorps.
Use of small dumptruck on park trails.
General scheduling.
Safety concerns.
IT be in touch as more info. develops
Thanks.
Chris
Christian D. Munter, P.E.
Surface Water Utility
City of Renton
1055 S. Grady Way - 5th Floor
Renton WA 98055
Phone: 425-430-7205
Fax: 425-430-7241
cmunter@ci.renton.wa.us
CC: rstraka@ci.renton.wa.us
e- ,
CEDAR RIVER VEGETATION RECOMMENDATIONS
Lower Cedar River, Right Ban
uJ �1 �
_ cti-`CS
lb C
1.) Most downstream segment — from mouth to boat launch — here, the bank has a bluff form
— a very steep drop between the upland, landscaped park, and the river. Invasives (Scq ch*
broom, blackberry, Common tanzy, Horsetail, Reed canarygrass, Japanese knotweed7K
grow in this steep area, and tend to creep into upland areas and crowd plantings. The
problem is that the steep area is unstable, difficult to plant, possibly unsafe to work in,
and subject to continued disturbance because of river level fluctuation and bank
erosion/sluffing. We'd like to remove invasives, but not let bank become unstable with
loss of plants and root cohesion with soil. We're interested in solutions that may
combine use of geotextile fabric, fescue/clover or other groundcover seeding, and
planting of native plants.
2.) South (upstream) of boat launch — to restrooms. Invasives less profuse here because
there is a mature tree zone in the riparian area, and the bank angle is more gradual and
thus more stable. Only removal of invasives is required in this area, and these invasives
are not profuse. Further south (upstream) there is a segment with a riprap bank area that
does not have a tree zone. Some invasives in this area, especially blackberry — be careful
not to confuse with Nootka rose.
3.) Between floodwall and river — invasives very profuse in open (non -shaded areas). From
the north (downstream) end of the floodwall to the South Boeing bridge:
• remove invasives between flood wall and river,
• Use some combination of geotextile fabric, soil/organic material supplement,
fescue/clover seeding to prevent re-establishment of invasives.
• Plant native tree species 6- 8 feet apart in a staggered pattern along both length and
width of bank area. Tree species should be at least 2 feet tall at planting, and include
a combination of Red alder, Cottonwood, Western red cedar, Western hemlock, or
Sitka spruce depending on price, availability, and professional judgement of the
landscaper.
• Plant native shrub or groundcover species in the spaces between trees, specifically
one shrub or groundcover in each space. Shrub species should include a combination
of Red -osier dogwood, Oregon ash, Tall Oregon grape, Nootka rose, Pacific willow,
Indian plum, Red -flowering currant, or Wild mock orange. Groundcover species
should include Salal, Swordfern, or Longleaf Oregon grape. The area should be
planted according to price, availability, and professional judgement of the landscaper.
• Water all plantings in first year from mid -June through October, as necessary.
Golder Associates
Lower Cedar River, Left Bank
1.) Immediately north of the South Boeing Bridge, there is a bank top area with invasive plants —
Scotch broom, blackberry, etc. Invasives were successfully removed from this area last
summer by Earthcorps. This area extends approximately 120 feet from the bridge to a large
clump of willow trees; the width of the area is about 40 feet. North of these willows the bank
narrows considerably.
• Remove scotch broom (including roots, to the extent practicable) and other invasives.
• Use some combination of geotextile fabric, soil/organic material supplement,
fescue/clover seeding to prevent re-establishment of invasives.
• Plant native tree species 6- 8 feet apart in a staggered pattern along both length and width
of bank area. Tree species should be at least 2 feet tall at planting, and include a
combination of Red alder, Cottonwood, Western red cedar, Western hemlock, or Sitka
spruce depending on price, availability, and professional judgement of the landscaper.
The area should be planted with 70-75 trees. Some planted alders are already growing
successfully near the wall.
• Plant native shrub or groundcover species in the spaces between trees, specifically one
shrub or groundcover in each space. Shrub species should include a combination of Red -
osier dogwood, Oregon ash, Tall Oregon grape, Nootka rose, Pacific willow, Indian
plum, Red -flowering currant, or Wild mock orange. Groundcover species should include
Salal, Swordfern, or Longleaf Oregon grape. The area should be planted with 70-75
shrub or groundcover plants according to price, availability, and professional judgement
of the landscaper.
• Water all plantings in first year from mid -June through October, as necessary.
2.) Continuing north, the bank is narrow for about 300 feet. This segment is not the most
amenable or cost effective area for re -vegetation efforts. The next area to be replanted is
where the white wall ends and chain link fence begins. This segment starts 300 feet north of
the end of the first re -vegetation area (described above), or approximately 600 feet north of
the South Boeing Bridge.
The segment to be replanted extends about 600 feet north, this is consistent with the entire
length of the chain link fence, and the part of the floodwall at each end of this segment where
the bank is still wide. Red alder planted here has been very successful on the slope.
However, the slope is barren of vegetation and the soil is exposed — not even invasive plants
are established on the slope below the fence.
• On slope below fence, excavate small "perched" terraces for shrub or groundcover
plantings by cutting vertically into the slope and then removing soil to leave about a one
square foot area for planting.
• Plant native tree species 6- 8 feet apart in a staggered pattern along both length and width
of bank area. Tree species should be at least 2 feet tall at planting, and include a
combination of Red alder, Cottonwood, Western red cedar, Western hemlock, or Sitka
spruce depending on price, availability, and professional judgement of the landscaper.
The area should be planted with 300-350 trees. Some planted alders are already growing
successfully near the chain -link fence, and Earthcorps' terraced area with salal plantings
and bark mulch has been very successful.
• Plant native shrub or groundcover species in spaces between established trees, roughly
one shrub or groundcover in each space between trees. Shrub species should include a
combination of Red -osier dogwood, Oregon ash, Tall Oregon grape, Nootka rose, Pacific
Golder Associates
t-
willow, Indian plum, Red -flowering currant, or Wild mock orange. Groundcover species
should include Salal, Swordfem, or Longleaf Oregon grape. The area should be planted
with shrub or groundcover plants according to price, availability, and professional
judgement of the landscaper.
On flat part of bank, remove and/or trim back Scotch broom, blackberry, and other
invasives around the planted groundcover species such as Oregon grape.
Use some combination of geotextile fabric, soil/organic material supplement,
fescue/clover seeding to prevent re-establishment of invasives.
Water all plantings in first year from mid -June through October, as necessary.
3.) Continuing north, the floodwall begins again and the bank narrows. This final segment
extends north for approximately 900 feet. In this segment, there are some Salal and Oregon
grape plantings (generally about a meter apart), and a few alders. The bank is narrow, the
soil is poor, and invasives are crowding out planted species. There are staked willows at the
toe of the bank that have had very little success.
• Remove invasive species.
• Use some combination of geotextile fabric, soil/organic material supplement,
fescue/clover seeding to prevent re-establishment of invasives.
• Plant groundcover, shrub, and tree species mentioned for above segments with plant
selection and spacing per professional judgement of landscaper. About 300 plants will
be required.
• Water all plantings in first year from mid -June through October, as necessary.
At the north end of this segment, the flood wall ends but a rock pile wall continues north.
Scotch broom and other invasives have been removed from this area, and a geotextile fabric
has been placed over the soil, but there has not been successful planting. The soil is poor in
this segment, very gravelly. This segment would also benefit from:
• Soil/organic material supplement, fescue/clover seeding to prevent re-establishment of
invasives.
• Plant groundcover, shrub, and tree species mentioned for above segments with plant
selection and spacing per professional judgement of landscaper. About 300 plants will
be required.
• Water all plantings in first year from mid -June through October, as necessary.
Golder Associates
Maplewood Golf Course Revetment Lou r- L- ov a `�
Replace dead trees on upper bank. 28 Western red cedars were dead but still in place along
the upper bank. Plant an equivalent number of Western hemlock, Western red cedar, or Sitka
spruce at least 2 feet tall as replacements.
Plant a combined total of 200 Red -osier dogwood and/or Red -flowering currant along the
bank
between the conifers on the upper bank and the water at the toe of the bank. Plant the shrubs
4 feet apart on the level part of the terraces. The revetment area extends 400 feet in length,
and there are 2 terraces between the upper bank and the water.
Protect existing shrubs and newly planted Red -osier dogwood with sturdy fencing (or other
protection) to prevent deer grazing. Given that shrub plantings will be continuous along the
terrace, it may be possible to use one continuous fence, rather than fencing around each plant.
Type of fencing will be left to the professional judgement of the landscaper.
��Q 7
Golder Associates
Elliot Rearing/Spawning Side -Channel
Red -osier dogwood plantings in the Elliot Rearing/Spawning Side -Channel area have been
heavily browsed/grazed by deer. Beavers have felled other trees. For this reason, all plantings
would benefit from individual fencing enclosures or other protective measures. To replace lost or
vandalized plantings, the following number of trees should be planted for each species:
• Red -osier dogwood, 40
• Salmonberry, 100
• Pacific ninebark, 20
• Western red cedar, 25
• Oregon ash, 60
• Pacific crabapple, 25
• Black cottonwood, 45
The best locations for these plantings would be three segments:
1. From the upstream end of the Elliot Rearing/Spawning Side -Channel to the road
crossing, both banks (Figures 2a and 2b),
2. From the road crossing downstream to the first bend (about 150 feet downstream of road
crossing), both banks (Figure 2c),
3. From the confluence of the small tributary and Elliot Rearing/Spawning Side -Channel
downstream to the first bend (about 100 feet downstream of the small tributary), both
banks (Figure 2e).
The shrub -type plants such as Red -osier dogwood, Salmonberry, Pacific ninebark, and Pacific
crabapple should be planted in a staggered pattern about one meter apart from each other and any
other plants. The remaining tree species should be planted two meters from each other, and at
least one meter from any shrub -type plants. The exact locations for each plant in the segments
identified above are left to the professional judgement of the landscaper.
Golder Associates
`1
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3,r-u iG,S ('wU-4 L4-4)
VEGETATION SUMMARY
1. Mitigation Requirements for Lower Cedar River and Elliot
Rearing/Spawning Side -Channel
Tables 6, 7, and 8 describe how Lower Cedar River and Elliot Rearing/Spawning Side -
Channel planted areas are progressing with respect to mitigation requirements.
Lower Cedar River right and left bank vegetation was assessed in 3.33 meter -diameter
circular plots every 100 meters as detailed in section 2 (Method) above. In addition, five
permanent photo points were established to assess overall vegetation. Mitigation
requirements stipulate that vegetation percent cover should be in the range of 40-60% in
year one, 60-75% in year two, and 75-90% in year five, and that percent survival should
increase similarly and remain steady at (or above) 90-95% after year five.
On the right bank (Cedar River Trail Park),15 of the 16 plot stations (Table 6) had
vegetation percent survival at or exceeding the year two requirement. 11 of the 16 plot
stations had greater than 90% survival. In contrast, only four of the 16 right bank plot
stations met the year two requirement for percent cover. There are two main reasons for
the significant difference between percent survival and percent cover. First, percent
cover is a function of growth. Generally, plant growth does not always increase linearly
with time. Young plants (especially after transplanting) have a low growth rate, then
growth increases linearly (after the plant is established and has increased leaf area for
photosynthetic activity to fuel growth). Growth rates level off again as the plant reaches
some optimal size where further growth is limited by maintenance demands. Given that
they were recently planted, many of the plants are still in their initial slow (non -linear)
growth phase and, in part, this accounts for the difference between percent cover and
percent survival.
Another reason for the low percent cover in contrast to high percent survival is that
many of the plot stations have only one or a few plants, and the remaining plot area is
park grass (Tables 1.1-1.16). This is especially true above (south of) 1100m (Table 6).
Park grass is not included in the percent cover or percent survival assessment, and the
one or few plants in these plots are not sufficient to meet the year two requirement of 60-
75%.
On the left bank, vegetation percent survival met the year two requirement in eight of 12
plot stations, but percent cover only met the requirement in five of 12 plot stations. Four
of these five plots were south of the South Boeing Bridge, where alders are established
and growing very well. At the other plot stations, the difference between percent cover
and percent survival is generally greater than on the left bank. The lower percent cover
is because of lower growth associated with the poor growing conditions on the left bank,
described in sections 3.2 and 4.2 above.
Golder Associates
1. RECOMMENDATIONS
1.1 Lower Cedar River, Right Bank
Lower river right bank sample plots generally showed high levels of survival, and good
growth as evidenced by percent cover and canopy cover. Bank stability is also good.
Given this success, trees and shrubs should be replanted to replace dead or lost
plantings based on gaps in the existing vegetation and shortfalls to functions and values,
such as reduced erosion, increased wildlife habitat, and reduction of "nuisance birds."
For shrubs, Red -flowering currant, Nootka rose (Rosa nutkana), and Wild mock orange
(Philadelphus lewisii) should be used as replacements. For trees, Shore pine (Pinus
contorta), Douglas maple (Acer glabrum), and Red alder would work well.
In many places along the lower river right bank downstream of the South Boeing Bridge,
there is a bluff -like morphology with an abrupt change in gradient from the upland side
to the riverside. Mitigation and park plantings are in the area upland of this bluff, and
generally benefit from the landscaping care in the park. On the bluff itself, invasive
species are growing profusely, and are beginning to extend upland. The invasive
species should be cut back or removed altogether. Following this, geotextile fabric
should be placed on the bluff areas to prevent erosion that might occur after the cutting
back/removal activity, and to prevent or delay return of invasive growth. Replacement
or supplemental plantings can then be made through the geotextile fabric in suitable
areas. For the replacement or supplemental plantings to survive and outcompete the
invasives, continual cutting back of the invasives is imperative.
1.2 Lower Cedar River, Left Bank
The lower Cedar River left bank is vulnerable to erosion and to loss of mitigation
plantings due to crowding from invasive species. Species that should be controlled are
Reed canary grass, Scotch broom, Common horsetail, and Common mullein. The
recommended method to control them is as follows:
1. Scarification — removal of aboveground part (i.e., stems and leaves) of invasive
plants, leaving roots to maintain coherence with soil.
2. Soil supplementation — addition of topsoil, compost, and/or partially
decomposed leaf litter to add nutrients, hold moisture, and stabilize soil surface
temperatures.
3. Seeding with grass/clover — hydroseeding with a mixture of Red fescue (Festuca
rubra), Perennial rye grass (Lolium perenne), and Red clover (Trifolium pratense).
4. Covering with geotextile fabric — cover will provide shading to discourage
invasive plants, and will prevent erosion of soil until grass/clover is established.
Golder Associates
5. Replanting - cut holes in geotextile fabric to plant trees, especially Red alder and
Willows which have already established quickly in a few areas of the lower river
left bank. Oregon ash and Red -osier dogwood would also be suitable species.
The use of geotextile fabrics, and grass/clover seeding have been successful at the
Maplewood Golf Course Revetment, Elliot Rearing/Spawning Side -Channel, and
Landsburg Gravel Supplementation Ramp areas, and should be applied on the left bank
of the lower river. The scarification, soil supplementation, and hydroseeding should be
done in mid -May, and the tree plantings should be done by mid -June. Invasives species
will have to be continually cut back and/or removed in order for the desired species to
become established.
Based on the survey plots done every 100 meters, the trees should be planted from 300
meters upstream of where the concrete floodwall begins (about 600 meters from the
river mouth) to the South Boeing bridge. The total distance is about 900 meters. With
trees planted every 5 meters (allowing for future growth and canopy development), a
total of 180 trees would be needed. 45 trees of each of Red alder, Willow species, Oregon
ash, and Red -osier dogwood should be planted.
Most of the shrub type plantings on the left bank were Oregon grape and Salal; with
flowering and fruiting, these plants provide some wildlife functions and value. Because
they are understory species, the Oregon grape and Sa should be replanted a year after
the trees to benefit from their canopy development and shading. Based on the survey.
plots, about 550 of each plant would be needed in the same reach as the tree plantings
mentioned above. The Oregon grape and Salal should be planted in the same manner as
the original plantings, roughly 10 plants spaced 2-3 feet apart in a staggered pattern.
Periodic trimming and removal of invasive plants on the left bank of the lower river will
help insure the long-term success of the plantings. Access is a significant issue for work
done on the lower river left bank; the space between the wall and the river is narrow and
somewhat unstable, and the Renton airport has safety and security concerns about use
of that area —
Plantings should be watered on a weekly basis from mid -July to the end of September.
An elevated tank could be placed on the airport side of the wall, with soaker hoses
extending into the planted areas.
1.3 Maplewood Golf Course Revetment
The overall condition of plantings and bank stability at the Maplewood Golf Course
Revetment area is good. Given this success, trees and shrubs should be replanted to
replace dead or lost plantings based on gaps in the existing vegetation. In particular,
shrubs should be replaced on the sloped area between the top of the bank where the
Golder Associates
coniferous trees are established and the bank toe near the water. For shrubs, Red -
flowering currant, Red -osier dogwood, and Oregon grape should be used as
replacements. Based on the original planting plans, 29 Red -flowering currant,121 Red -
osier dogwood, and 25 Oregon grape should be planted. The Red -osier dogwood plants
will need to be protected from deer grazing.
For trees, Douglas fir, Western red cedar, and Red alder would work well. The trees
should be planted in the upland area where space remains for growth, and on the slope
between the upland (landward) area and the bank toe. Based on the origina�tmg
plans, 25 Douglas fir, 23 Western red cedar, and 49 Red alder should be planted.
trees and woody (in contrast to herbaceous) shrubs (such as Red -osier
dogwood) should be protected with fencing to prevent deer and beaver
browsing/grazing.
There are many fewer willows alive (56) than were planted (1000, according to the
planting plan). However, the willows planted as stakes have flourished at the bank toe i o0 l:
(or water's edge), and their volume occupies much of the riparian area immediately V,, Ir
adjacent to the water (Figures 5a-d). In addition, the already -established willows can
propagate by rhizomes to surrounding areas. It is possible the extensive riprap at the
bank toe has prevented establishment of more willows. The existing willows do provide
riparian function: root cohesion prevents bank erosion, overhanging branches provide
some shade, refuge, and insects to the river, leaf input to river serves as organic detritus
that supports detritivores and other invertebrates that are the base of the aquatic food
web. The willows also serve as habitat for passerine (songbird) bird species.
1.4 Elliot Rearing/Spawning Side -Channel
Red -osier dogwood plantings in the Elliot Rearing/Spawning Side -Channel area have
been heavily browsed/grazed by deer. Beavers have felled other trees. For this reason,
all plantings would benefit from individual fencing enclosures or other protective
measures. To replace lost or vandalized plantings, the following number of trees should
be planted for each species:
• Red -osier dogwood, 40
• Salmonberry, 100
• Pacific ninebark, 20
• Western red cedar, 25
• Oregon ash, 60`
• Pacific crabapple, 25
• Black cottonwood, 45
The best locations for these plantings would be three segments:
Golder Associates
1. From the upstream end of the Elliot Rearing/Spawning Side -Channel to the road
crossing, both banks (Figures 2a and 2b),
2. From the road crossing downstream to the first bend (about 150 feet downstream
of road crossing), both banks (Figure 2c),
3. From the confluence of the small tributary and Elliot Rearing/Spawning Side -
Channel downstream to the first bend (about 100 feet downstream of the small
tributary), both banks (Figure 2e).
The shrub -type plants such as Red -osier dogwood, Salmonberry, Pacific ninebark, and
Pacific crabapple should be planted in a staggered pattern about one meter apart from
each other and any other plants. The remaining tree species should be planted two
meters from each other, and at least one meter from any shrub -type plants. The exact
locations for each plant in the segments identified above are left to the professional
judgement of the landscaper.
1.5 Landsburg Gravel Supplementation Ramp
Figure 4b shows the lower part of the ramp, close to the river's edge. Hydroseeding in
the lower ramp had less success than in the upper ramp. Although the geotextile fabric
is still intact, the area is vulnerable to erosion. The erosion could occur with higher river
levels, prolonged precipitation, and/or continued foot traffic. It would not be practical
to recommend extensive work in this area since gravel supplementation will continue
most years, and heavy equipment will be moving up and down the ramp. However,
two recommendations apply here:
1. Peel back the exposed geotextile fabric, add an inch of organic material
(compost), hydroseed the area again, and replace the geotextile fabric.
2. Divert foot traffic by roping off the newly hydro seeded area.
Golder Associates
2. DISCUSSION
2.1 Lower Cedar River, Right Bank (Cedar River Trail Park)
The first monitoring station is 100 meters south (upstream) of the North Boeing Bridge
at the mouth of the Cedar River. Subsequent monitoring stations are spaced 100 meters
apart, with the final station (1600 m) close to Logan Avenue North.
In many instances, the original Plant Material List and Legend and associated drawings
(U.S. Army Corps of Engineers, Seattle District, 1998) differ from actual plantings. This
may be due in part to mortality of original plantings, and subsequent re -plantings of
different species, or natural recruitment of volunteer species. Much of the right bank
immediately adjacent to the river is steep and unstable, and invasive species are
established in many of these areas.
Tables 1.1-1.16 show percent cover, canopy cover, and percent survival for planted
species as well as volunteer/invasive species. For grasses, forbs, and emergent -type
plants, "canopy cover" does not apply as a criterion (although "percent cover' does).
Likewise, for invasive species, "percent survival' does not apply. In these categories,
"N/A" (not applicable) is used.
Invasive species on both the right and left banks in the lower river tend to thrive on the
steeply sloped part of the bank. The establishment of plants like Reed canary grass
(Phalaris spp.), Common tanzy (Tanacetum vulgare), Scotch broom (Cytisus scoparius),
Common horsetail (Equisetum arvense), Common mullein (Verbascum thapsus), Japanese
knotweed (Polygonum cuspidatum) and Himalayan blackberry (Rubus discolor) in the
sloped area is consistent with disturbance there due to unstable soils, water level
fluctuations, etc. Moreover, these species have greater abundance on the left bank,
which generally has a more abrupt slope, and even in some areas a bluff -like
morphology.
Right bank plantings have less competition from invasive species because there are
revetted areas (to stabilize the bank), and because certain invasive species were
physically removed by the City of Renton Public Works Maintenance Division during
2000. In addition, it is possible the left bank plantings have other disadvantages related
to aspect (orientation to the sun), proximity to the airport floodwall (may affect
temperature, light, runoff, etc.), and soils (right bank has probably received some soil
supplementation as part of the landscaping). Right bank plantings also benefit from
irrigation and other maintenance efforts since they are in the Cedar River Trail Park.
Right bank sample plots generally showed high levels of survival, and good growth as
evidenced by percent cover and canopy cover. Forb/emergent, shrub, and tree
vegetation diversity is good, and maintains a wildlife function for the riparian area
consistent with the mitigation objective of reduced "nuisance bird" populations.
Golder Associates
2.2 Lower Cedar River, Left Bank
Left bank vegetation monitoring started at the north end of the airport wall that runs
roughly parallel to the river. This point is across from Station 600m on the left bank, and
is approximately 600 meters upstream (south) of the mouth of the river at Lake
Washington. The left bank has a greater abundance of invasive species (Tables 2.6 —
2.18), to the extent that many of the original plantings have failed because of crowding
by the invasives. These species are the same invasive species colonizing steep areas on
the right bank; their greater abundance on the left bank is probably due to a more
extensive disturbed area on the left bank, and to a lack of landscaping care.
In many instances, left bank plantings were alive, but crowded or shaded out by
invasive plants like Reed canary grass, Scotch broom, Common horsetail, Himalayan
blackberry, and Common mullein. At present, because the flowering/fruiting plants like
Salal and Oregon grape (Mahonia spp.) have lower survival, the wildlife function of the
left bank vegetation is compromised.
Red alder (Alnus rubra) and Pacific willow (Salix lasiandra) showed good growth and
high survival on the left bank. Tree species are important on the left bank for various
reasons:
shading is a potential means of control for many invasive plants, the deeper roots of the
tree species will have greater coherence with soils to prevent further erosion in this
unstable riparian area, and leaf litter is a source of organic material for the soil. In the
river, it serves as a food source for detritivores and other invertebrates that are the base
of the aquatic food web.
2.3 Maplewood Golf Course Revetment
In spite of low percent survival of plantings (Table 3), the overall condition of vegetation
and slope stability at the Maplewood Golf Course Revetment is good. The combination
of large woody debris, terraced slope, use of geotextile fabrics, and grass/clover cover
appears to be very effective. In addition, the large woody debris placements at the base
of the slope are still functioning.
Western red cedars (Thuja plicata) planted on the top of the slope showed good growth
and high survival, with the exception of nine trees in a row on the uppermost (northern)
portion of the top of the slope; these trees were still rooted with branches intact but had
died. Two Western red cedars had been felled by beavers, but were still alive. Douglas
fir (Pseudodotsuga menziesii) and Red alder (Alnus rubra) had fair survival from original
numbers planted but good growth overall. Willows (Salix spp.) and Red -osier dogwood
(Cornus stolonifera) had poor survival from original numbers planted, but fair growth of
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surviving plants. Deer browsing has severely limited the growth and establishment of
Red -osier dogwood.
Tall Oregon grape (Mahonia aquifolium) plants had excellent growth and survival. This
may be due in part to their spiny leaves and not being preferred forage for deer.
Red -flowering currant (gibes sanguineum) had fair survival from original plantings, but
good growth of surviving plants.
The seed mix of Red fescue (Festuca rubra), Perennial Rye grass (Lolium perenne), and Red
clover (Trifolium pratense) at this site achieves the objective of covering the soil and
preventing erosion without crowding or shading the understory or shrub -type
plantings.
Although Vine maple (Acer circinatum) are on the plant list for the site, none were
observed.
Invasive species include Japanese knotweed along the bank, and Bittersweet nightshade
(Solanum dulcamara), Himalayan blackberry, Canada thistle (Cirsium arvense), and Reed
canary grass on the slope between the toe and the top of the bank. At present, these are
not having a detrimental effect on the mitigation plantings, but have the potential to
overrun parts of the revetment area.
2.4 Elliot Rearing/Spawning Side -Channel
Plantings in the Elliot Rearing/Spawning Side -Channel (Tables 4.1-4.6) had fair growth
and fair survival. Many fewer plants were observed than were in the planting plan, and
since some uprooted and discarded plants had been observed earlier in the year, it is
possible many plants were removed by vandalism.
Red -osier dogwood plantings were heavily grazed by deer; in some cases, plants over
three feet tall had just one or two small leaves and very thin stems. At this rate, the
plants will not get established because their limited leaf area (and ability to
photosynthesize) will limit food production for the plant, and consequently its growth.
Western hemlock (Tsuga heterophylla) and Sitka spruce (Picea sitchensis) plantings were
fewer in number than the planting plan shows (possibly due to the vandalism), but had
good growth. Most of the removed plants were downstream of the road crossing. The
banks on either side of the channel segment about 200 feet downstream of the small
tributary (Figure 3) had no plantings present, although this area had obviously been
prepared for planting with hydroseeding and geotextile fabric.
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With the exception of the Western hemlock and Sitka spruce, over half of the plants on
the right bank upstream of the road crossing appear stressed, probably an effect of their
orientation to the sun, and the very low rainfall in 2000 and 2001.
Many of the Oregon ash (Fraxinus latifolia) plantings had orange beetles, and many of
their leaves were curled up at the distal ends.
The planting plans show two areas in the Elliot Rearing/Spawning Side -Channel to be
planted with native emergent plants. These include sedges and rushes, specifically
Lenticular sedge (Carex lenticularis), Sleder rush (Juncus tenuis), Sawbeak sedge (Carex
stipata), and Slough sedge (Carex obnupta). The two areas are at the upstream end of the
channel (Figure 2a, Figure 3), and immediately below the road crossing (Figure 2c,
Figure 3). However, many of the emergents were either not planted or did not survive.
At the upstream end of the channel, Reed canary grass and clover predominated, with
some Soft rush Uuncus effusus) at the water's edge. In the channel segment downstream
of the road crossing, clover, Reed canary grass, Colonial bentgrass (Agrostis capillaris),
and Soft rush predominated on the left bank. On the right bank, a sign on a string that
delineated the area read Carex obnupta (Slough sledge), but the predominant plants were
Soft rush, Reed canary grass, Colonial bentgrass, and a lot of clover. There were also 19
Hardstem bullrush (Scirpus acutus) in the segment from the road crossing downstream
to the first bend in the channel (about 150 feet, shown in Figure 2c).
Invasive species present at the site included extensive Japanese knotweed, Reed canary
grass, and Himalayan blackberry. At present, these invasives are not having a
detrimental effect on the mitigation plantings, but with time could easily overrun the
mitigation plantings.
2.5 Landsburg Gravel Supplementation Ramp
Nine Western red cedars and one Douglas fir were planted on the margins of the
Landsburg Gravel Supplementation Ramp, and all have survived. Two of the Western
red cedars were stressed, probably as a result of the transplantation and low
precipitation. The combination of hydroseeding and geotextile fabric was successful on
the upper bank (Figures 4a and 4c) but the hydroseeding was less successful on the
lower bank, and the geotextile fabric is exposed (Figure 4b). This exposed area is steeper
and more vulnerable to erosion from the river and from the significant foot traffic in that
area.
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