HomeMy WebLinkAbout18-166 - Schneider & Schneider - Right of Entry and Construction for 14900 Interurban Avenue SouthRIGHT OF ENTRY
AND CONSTRUCTION AUTHORIZATION AGREEMENT
18-166
Council Approval N/A
THIS RIGHT OF ENTRY AND CONSTRUCTION AND MAINTENANCE
AUTHORIZATION AGREEMENT ("Agreement") is entered into this p2 rP day of
, 20/' by and between Schneider & Schneider, LLC hereinafter referred to
e "Grantor(s)" and TUKWILA, a noncharter optional municipal code city, herein after referred to as
the "Grantee".
WHEREAS the Grantor owns property located at 14900 Interurban South in Tukwila,
Washington, which is also known as King County parcel number(s) 359700-0006 and 359700-0009
(the "Premises"); and
WHEREAS the City has funded and will complete a salmon habitat restoration project titled,
Green the Green, ("Project") along the shoreline of the Premises that will construct improvements
including invasive species removal and tree and shrub planting as well as other improvements and
amenities in accordance with the contract plans, specifications and standards of the Tukwila Municipal
Code; and
WHEREAS the primary function of the project is to plant and establish native trees and shrubs
that will provide shade, and thus maintain cool water temperatures critical to salmon survival and
reproduction.
WHEREAS the City (Grantee) anticipates said project will begin July 1, 2018 and be
completed by July 31, 2028 (the "Term"). This time period allows for multiple seasons of
maintenance associated with plant establishment.
WHEREAS the Grantor will provide access to and pay for an on -site supply of potable water
so that the Grantee may water plants for the duration of the Agreement.
NOW, THEREFORE, in consideration of the mutual promises set forth herein, it is agreed
as follows:
1. The Grantor shall grant the Grantee, and Grantee's officers, officials, employees, agents,
contractors and utilities the right and authorization to enter the Premises to perform the work described
and shown in Attachment A hereto, incorporated herein by this reference, hereto (the "Work").
2. Grantor represents and warrants that it is the owner or owner's authorized agent of the
Premises.
3. Grantee shall have the right of ingress and egress, in a reasonable manner, to and from the
Premises, to conduct the Work. Said Work shall be limited to the hours between 8:00 a.m. and 6:30
p.m. and shall be limited in scope and duration as is reasonably necessary for the performance of the
Work.
4. The Work may cause some disruption to the Premises. The Grantee shall seek to
minimize disruption of the Premises and shall restore the Premises to its existing condition, as nearly as
possible, after the Work is complete.
1
,S�a 1 d G�/6i09�S
5. The Grantee shall complete all Work at its sole cost and expense.
6. This agreement shall become effective upon mutual execution and shall expire ten years
from the date of mutual execution. The duration of this Agreement may be extended by the written
agreement between the Grantee and Grantor.
7. To the extent authorized by law, Grantee shall indemnify, defend and hold Grantor harmless
from and against any claims, loss, costs, legal action, Liability, or expense on account of personal injury
to any persons or damage to or destruction of property, resulting from the Grantee's or its agents
negligent exercise of the rights herein granted, excepting only to the extent such claims, costs, damage,
injury or expense are not caused by the negligence of the Grantee or are caused by Grantor's negligence.
8. This Agreement is the entire agreement of the parties and supersedes any prior agreement
with respect to the subject matter hereof. This Agreement may not be modified or assigned without the
written consent of the parties. If a court of competent jurisdiction deems any provision of this
Agreement invalid or unenforceable, the remaining provisions shall remain in full force and effect.
9. This Agreement may be executed in identical counterparts.
10. Any notices shall be delivered in person or mailed by certified post and addressed to the
Grantor or Grantee at the addresses set forth below.
11. This Agreement shall run with the land for the Term of the Agreement and will be recorded
against the Property by the City.
written.
IN WITNESS WHEREOF, the parties have set their hands the date and year first above
GRANTOR(S)
By:
3 a'j%: 0).� G� 7
Address
GRANTEE —CITY OF TUKWILA
2
6200 Southcenter Boulevard 10-5 _ pe,
Tukwila, WA 98188
APPROVED AS TO FORM:
City 4torney
STATE OF WASHINGTON
COUNTY OF KING
I hereby certify that I know or have satisfactory evidence that \..(({ 3 '(ArlUStlis the person who
appeared before me, and said person acknowledged that he/she signed this instrument, on oath stated that
he/she was authorized to execute the instrument and acknowledged it to be his/her free and voluntary, act
for the uses and purposes mentioned in this instrument.
Dated: C 2 2O
.Signatur
Notary Public in and +r the State of Washington
Notary (print name):
Residing at:
STATE OF WASHINGTON
COUNTY OF KING
I hereby certify that I know or have satisfactory evidence that 14 Ito,n EX , is the person who
a peared before me, and said person acknowledged thattshe signed this instrument, on oath stated that
eI%/she was authorized to execute the instrument and acknowledged it to beeRher free and voluntary, act
for the uses and purposes mentioned in this instrument.
Dated:
Signatur
DCh:=4,4.f- 5, 2..0 is
Notary Public in and for the State ofWashington
Notary (print name) )4 el a A �
Residing at: I /TC0 to cam.
3
Attachment A
Description of Work
4
riparian enhancement project plan
tukwila green the green
jsh properties
Table of Contents
Tukwila "Green the Green" Riparian Enhancement Project Plan
JSH Properties
Section 1— Project Plan
• Location Information
• Project Overview
• Roles and Responsibilities
• Timeline
• Zone Descriptions
• Site Preparation
o Himalayan Blackberry
o English Ivy
o Japanese Knotweed
o English Hawthorne
• Erosion Control
• Planting
o Plant Materials & Sources
o Plant Handling
o Plant Installation
■ Bareroot Plants
■ Stakes
o Plant Spacing
• Watering
• Maintenance & Monitoring
o Monitoring
o Maintenance
o Replanting
Section 2 - Location Maps
• Geographic Location Map
• Project Area Map
• Project Zones Map
Section 3 — Planting Plan
• Option 2 — Planting Plan Spreadsheet
• Option 2 — Project Cost Sheet
Appendices
• Detail for Bareroot Trees and Shrubs
• Straw Wattle Installation
• Tree/Shrub on Slope Planting Detail
Section 1 - Project Plan
Project Plan: JSH Properties
Location Information:
JSH Properties
Southcenter Plaza
14900 Interurban Ave South
Suite 130
Tukwila, WA 98168
www.jshproperties.com
Contact Information:
Amy LeMieux
Property Assistant
425-283-5467 (office)
425-890-8964 (cell)
amykajshproperties.com
Project Overview
The JSH Properties project plan was prepared by the King Conservation District on
behalf of the City of Tukwila to support the City's collaboration with JSH Properties on
installation of a Duwamish River riparian buffer enhancement project. The project
location is the JSH Properties Southcenter Plaza parcel in Tukwila where the
Duwamish River runs adjacent to the east side of the JSH Properties on parcel.
The primary riparian resource concerns identified at this location are a lack of diverse
native riparian vegetation and infestations of several different invasive species,
including large infestations of Himalayan blackberry (Rubus armeniacus), English ivy
(Hedera helix) and some infestations of Invasive knotweed (Polygonum spp.).
The agreed upon goals of the project plan are to remove and control the invasive
species and enhance the riparian vegetation with native trees and shrubs. These
resource improvement actions will have several long term ecological benefits,
including improved canopy for shade over the river, improved water quality', reduced
soil erosion, and improved wildlife habitat for both terrestrial and aquatic organisms2.
Roles & Responsibilities
The JSH Properties project plan outlines management activities aligned with the
Tukwila Green the Green Initiative that will be implemented under the direction of the
City of Tukwila. The City in its capacity as manager of the project will select a
contractor to install the project, issue a contract to the selected contractor, and
oversee contractor activities to ensure project success.
King Conservation District in its role of project planner was responsible for
communications with the landowner throughout the project selection and planning
phases. ruperlies wilt nutify City of Tukwild if they dre requesting additional
' The Washington Department of Ecology reports Duwamish River water quality issues
including temperature, pH, PCBs, 4,4'-DDD, 4,4'-DDT, 4,4'-DDE, and Alpha-BHC
z The Washington Department of Fish and Wildlife reports Duwamish River salmon species
including Fall Chinook, Pink, Coho, Winter & Summer Steelhead, Fall Chum, Bull, and Sockeye.
King Conservation District O C' r ect Plan & Specifications -- JSH Properties 0 May 2018
begin site
recommended to ensu
herbicide on the project site in ear
for chemical control of inv.
•
alternate time
c
18
Page 2
Timeline Use Alternative Timeline located after Zone Descriptions section
ollowing project implementation timeline assumes selection of a contrac •
tion during late spring and summer of 2018. Thi ' - ine is
ctive site preparation •(• .. anting. Spraying
mmer will meet Best Practices criteria
ecies prior to • • winter planting on the site. An
rovided in the Appendix should a con be unable to
e two applications of herbicide by mid -September 2018.
Winter - Contracts signed by landowner and City of Tukwila
• .ring - Select contractor and secure all funding for project install • ion
• Su • er (June)- First herbicide treatment of invasive species p sent
• Summ July/August) - Mow invasive species and leave on , e, install straw
wattles to •w erosion
• Summer (July •ust) - Spray in compost and mulc
• September - Retreany regrowth of invasive sp ies with herbicide
• October- Install nativ slant stakes in zone 1 : 2
2019
• January / February - Install bare , . plant species in zones 2 - 5
• June - Monitor site for surviva : ete q ine if any replanting is needed
• Summer - Water as neede
• July/August - Herbicid reatment of regro invasive plant species
2020-2023
• January/ Fe. uary - Replant bareroot plants as neede
• Summer onitor sites for invasive species regrowth aneat with herbicide
asne-:ed
2024 • d beyond
Thin tree species to promote optimal tree growth, including ideal tree c •wn to
height ratios and overall tree vigor.
Zone Descriptions
ZONE 1 (4,500 ft2): This zone is steep, wet, and tidally influenced with an ordinary high-
water line a few feet into the zone. There are some locations with established willows
and dogwood trees. Most of this zone has invasive Himalayan blackberry overhanging
the river. Treat the blackberry with herbicide and mow down dead canes before
��ir�a CcnseRiatic,,-,Project Plan & Specifications -- JSIH-1 Properties May 2018
Page 3
planting. Stake willows and shrubs all along the river in 3 rows with plants spaced 2
feet on center. Do not stake in areas that already have willows along the shore.
ZONE 2 (12,338 ft2): The zone is very steeply sloped with a mix of full sun to partially
shaded areas. The soil is mostly dry to moist since this zone is perched above the river.
This zone is tidally influenced during peak flow months in the winter and plants may
be submerged for up to 3 months. There are a few deciduous trees sparsely spread
throughout the zone. Invasive species present in this zone include Himalayan
blackberry and patches of invasive knotweed. There has been some treatment of the
knotweed in this zone by King County Noxious Weeds. Treat blackberry with herbicide
and mow down dead canes before planting. Stake willows and shrubs will be planted
in the steepest section of this zone, near the northern part of the property. Install
bareroot trees and shrubs throughout the rest of the zone that are tolerant of high
winter flows and summer drought.
ZONE 3 (5,338 ft2): This zone runs adjacent to a walking trail at the top of the bank. The
zone is mostly sunny and dry, with some areas of partial shade next to established
vegetation. There is currently dense, established ivy present in this zone, along with
some blackberry and knotweed. The ivy is up to 2 feet deep in some areas.
Landscaping fabric has been placed beneath some of the ivy. Apply herbicide to all
ivy, blackberry, and knotweed in this zone. Mow blackberry and leave on site. Stomp
knotweed canes and leave on site. Remove ivy and haul to dump. Bareroot shrubs and
groundcovers will be planted in this zone with consideration to aesthetics of other
property landscaping.
ZONE 4 (5,658 ft2): This zone is in full sun with a moderately steep slope. The conditions
are dry in the top portion of this zone. The lower section of this zone may still be
influenced by high winter flows. The walking trail runs along the top of the bank,
adjacent to this zone. There are small patches of dogwood along the toe of the slope.
Himalayan blackberry has overrun most of this zone. Install bareroot trees and shrubs
that can tolerate full sun and dry soil conditions.
• 6,893 ft2):This zone has a well -established tree canopy and understoa - s .s
with some ex • - steep slopes. The trees are mostly deciduo . conifers should
be planted in the underst• •ere are several En• - .wthorne trees that will be
treated with herbicide. Leave trees on ecompose over time. Along the west
portion of this zone, ther- - -s ablished native p . • ear the sidewalk. Planting will
occur alon • a - . p of the bank in the open space near the trea - . fish Hawthorne
onifer trees and shrubs will be planted in this area on the top of the :.
ZONE 6 (2,620 ft2): After a slope failure, an engineering firm was brought in to mitigate
the damage and stabilize the slope. This zone was planted in 2016. Fill material was
added to the slope and drains were redirected to the toe of the slope. No additional
work is needed here, but there should be monitoring of the cracks along the top of the
bank in this zone.
King Conservation District • Project Plan & Specifications — JSH Properties • May 2018
Alternative Project Installation Timeline
2018
• Summer (May/June) - Contracts signed by landowner and City of Tukwila
• Summer (June/July) - Select contractor and secure all funding for project installation
• Summer (July/August) - First treatment of invasive species present
• Summer (July/August) - Install straw wattles to slow erosion and reduce
• Summer (July/August) - Once herbicide treatment has killed plants, mow or cut dead
canes of invasive species and leave on site,
• September- Spray in compost and mulch
• September - Retreat any regrowth of invasive species with herbicide
• October- Install native plant stakes in zone 1 & 2
2019
• January/ February - Install bareroot plant species in zones 2 - 5
• June - Monitor site for survival, determine if any replanting is needed
• Summer - Water as needed
• July/August- Herbicide treatment of regrown invasive plant species
2020--20.23
• January / February - Replant-bareroot plants as needed
•
nccdcd Complete 1-year Plant Establishment period
Page 4
Site Preparation
Site preparation is a very important factor in the success of planting projects. This step
provides a competition -free substrate, which is imperative to the success of any re -
vegetation projects. The main goal is to eradicate any unwanted or non-native
vegetation that may inhibit the growth of the more desirable species, including
species that already exist on the site or are going to be planted in the future.
There are a wide variety of methods that can be implemented to achieve favorable
conditions for a planting site. The method you choose will depend on the size of the
area to be planted, the existing conditions, the types of plants to be planted, and the
project budget. Site preparation methods can include manual, mechanical, and/or
chemical removal. Follow site preparation recommendations for each invasive species
found in the different project zones. Refer to the King County Noxious Weed Control
Board best management practices included in the Appendix.
Remember - the Pesticide Label is the Law. All federal, state, and local regulations
regarding use of pesticides, disposal of pesticides, and disposal of pesticide containers
will be followed.
Herbicide can be used when there is no concern for damage to surrounding areas or
desirable species. Certain herbicides are approved for aquatic area use. Use aquatic
approved herbicides when there is any potential for drift in to the riparian zone.
Recommendations for the use of chemicals require a license and are subject to WSDA
(Washington State Department of Agriculture) and WSDNR (Washington State
Department of Natural Resources) regulations. Herbicides should only be applied in
accordance with product label and consistent with all federal, state, and local laws.
• Himalayan Blackberry (Rubus armeniacus) - Zones 1 - 4
o Treatment of Himalayan blackberry will be most effective with herbicide
application, followed up by mowing dead canes, and finally retreating any
regrowth before planting.
• HERBICIDE: Use an aquatic approved herbicide containing
glyphosate to treat blackberry. Initial herbicide treatment should
occur in the early summer (June). Secondary treatment of blackberry
with herbicide should occur in September. Apply based on
application rate on label of herbicide. All herbicide applications
need to follow label instructions as well as local and state
regulations.
• MOWING: After treating blackberry with herbicide, mow down
blackberry as low as possible and leave on site to protect soil.
Options for mowing include using a brush cutter, brush hog or
manually cutting. Mowing or cutting should take place in the
King Conservation Disti-ict 0 Project Par & Specifications -- JSH Properties 0 May 2018
Page 5
summer after the herbicide has killed the plant. Cut canes so they
fall onto the project site, not in the water. Rope up as needed when
mowing on steep slopes.
■ PRECAUTIONS: Always follow directions when applying herbicide.
Take extreme care to avoid spray drift and off -target spray
impacting existing native vegetation. Do not spray in the rain or
when rain is soon expected, as per application instructions. There
are some very steep slopes directly adjacent to the shore. Use
personal floatation devices and ropes/harnesses as needed to stay
safe.
o See the King County Blackberry BMP factsheet in the Appendix section for more
information.
• English Ivy (Hedera helix) - Zone 3
o Treatment of English ivy will be most effective with herbicide application,
followed up with mowing dead vines, and finally retreating regrowth of ivy
before planting.
• HERBICIDE: Use an aquatic approved herbicide containing
glyphosate to treat English Ivy. Initial herbicide treatment should
occur in the early summer (June). Secondary treatment of ivy with
herbicide should occur in September. Follow all application rate
instructions on herbicide label. All herbicide applications need to
follow label instructions as well as local and state regulations.
• MOWING: After treating English ivy with herbicide, mow all ivy as
close to the ground as possible. Options for mowing include using a
brush cutter, brush hog or manually cutting. Mowing or cutting
should take place in the summer/fall after the herbicide has killed
the plant.
■ MANUAL REMOVAL: Small patches of English ivy or any ivy
growing up trees can be manually removed. Pull as much of the root
system up as possible to reduce regrowth of the plant. Do not pull
ivy from the tops of trees! Cut the ivy that is growing on trees
approximately 4-5' from the ground and remove all ivy from the
trunk and surrounding area. This will kill the ivy growing in the trees
without damaging the tree or posing a hazard to the crew.
• PRECAUTIONS: Always follow directions when applying herbicide.
Take extreme care to avoid spray drift and off -target spray
impacting existing native vegetation. Do not spray in the rain or
when rain is soon expected, as per application instructions.
• See the King County English Ivy BMP factsheet in the Appendix section for more
information.
;1 Conso:vaticrt District
Project Plan & Specifications -- JSf Propert es 0 May 2013.
Page 6
• Invasive Knotweed (Polygonum spp.) - Zones 2 & 3
o Treatment of invasive knotweed will be most effective with herbicide
application, followed up with knocking down dead canes, and finally
retreating regrowth of knotweed before planting. King county noxious
weeds has treated some of the knotweed on this site and may be able to
continue with the treatment in support of this restoration project.
• HERBICIDE: Use an aquatic approved herbicide to treat knotweed.
Initial herbicide treatment should occur in the late summer
(September) before the plants begin to senesce. Follow all
application rate instructions on herbicide label. All herbicide
applications need to follow label instructions as well as local and
state regulations.
• KNOCK DOWN CANES: After treating knotweed with herbicide,
stomp down all canes after they have fully died back. Leave dead
plant material on the site to keep the soil covered. Moving or
mowing knotweed can cause it to spread to other sites downstream.
Do not mow any Knotweed within the project; additionally, do not
remove any part of this plant from the project area. If you do
remove that plant from the project area, do not put in any compost
or yard waste bins. Any parts removed from the project should be
bagged and placed in the garbage.
• PRECAUTIONS: Always follow directions when applying herbicide.
Take extreme care to avoid spray drift and off -target spray
impacting existing native vegetation. Do not spray in the rain or
when rain is soon expected, as per application instructions.
o See the King County Invasive Knotweed BMP factsheet in the Appendix section
for more information.
• English Hawthorne (Crataegus monogyna) - Zone 5
o Do not cut down the English Hawthorne without also applying herbicide to
treat the stump. English Hawthorne can sprout from an untreated stump.
Eradicate English Hawthorne by either cutting the stump and applying
herbicide or using an EZ-Ject lance to apply herbicide bullets.
o Treatment of English Hawthorne will be most effective with herbicide
application and manual removal of any seedlings.
• HERBICIDE: Use either the cut -stump method or EZ-Ject bullets to
treat Hawthorne. Follow all application rate instructions on
herbicide label. Leave in herbicide bullets long enough to ensure
that the chemical travels throughout the plant. All herbicide
King Conservation District • Project Plan & Specifications — JSH Properties • May 2018
Page 7
applications need to follow label instructions as well as local and
state regulations.
• MANUAL REMOVAL: After treating the Hawthorne with EZ-Ject
bullets, leave the tree on the site to decompose. Manually remove
any seedlings that are growing throughout the zone.
• PRECAUTIONS: Always follow directions when applying herbicide.
Take extreme care to avoid off -target impacts to existing native
vegetation.
*AII recommended practices are stated in King County Best Management factsheets
located in the Appendix. Please reference factsheets for more information about any
specific invasive plant.
Erosion Control
This site is extremely steep and an emphasis on planning for and managing erosion is
critical. Compost, mulch and straw wattles are recommended for absorbing and
slowing down water flow on the steep slopes. Compost will also help to amend the
soil to support plant growth and improve growing conditions.
Compost and mulch can be installed to intercept rainwater falling into project zones.
These materials absorb water to slow surface runoff into the river.
Compost should be sprayed onto the slope above the ordinary high-water line of the
site after the invasive plants have been mowed or knocked down. The layer of
compost should be sprayed on 2" thick.
After the compost is applied, a 2" layer of bark mulch should be applied over the
compost and above the ordinary high-water line. Mulch helps newly installed plants
become established in their new environment by reducing competition from weeds
and other undesirable vegetation in and near the root zone of installed plants; by
providing an insulating layer of material that helps retain soil moisture during the
dryer summer months; and by contributing organic material to the soil horizons.
Straw wattles are manmade cylinders of compressed, weed free straw, 8 to 12 inches
in diameter and 20 to 25 feet long. Wattles increase infiltration, add roughness, reduce
erosion, and help retain eroded soil on the slope. They provide excellent short-term
protection as vegetation establishes.
Wattles should be installed in a shallow trench forming a continuous barrier along the
contour (across the slope). It is recommended that two rows of wattles be placed in
Zones 2 and 4.
KJtgi Ccr,savv:icri' I f '`.6'it k Project Pi'an & Spe<.'i icatic; ;a — liS; l Pees May 2018
Page 8
Planting
Planting native trees and shrubs in areas formerly infested with invasive species is the
best long-term management technique. Native trees and shrubs increase competition
and shading, reducing opportunities for blackberry, knotweed, ivy, and other invasive
species to re -colonize. Bareroot plants and live stakes are recommended for this
project depending on the planting zone. Reference planting plan and schematic
(Appendix) for species selected and quantities for each zone.
Planting plan recommendations are based on plant sun exposure and soil moisture
preferences, with the primary goal focused on establishing shade. A silvicultural
forestry approach to quick tree establishment includes a reduced spacing between
trees (as tight as 8' on center distance between trees) to increase competition and
encourage growth. This method requires thinning after 7-10 years to maintain tree
health and preventing overcrowding. Reference materials housed in the appendix
offer multiple options for tree spacing depending on the planner or landowner's
ability to thin the stand of trees.
Plant Materials & Sources
• Bareroot Plants
o Use in zones 2 - 5
o Review "KCD Native Plant Nurseries FdCISlteet✓ for Ibcof puLentlal plani
en 1 —
• Stakes
o Use in zones 1 & 2
o 'i<CD Native"
o Another option is to harvest stakes from local sources (native willows and
red osier dogwoods)
o Use 4 - 6' long stakes
Plant Handling
Bare root plants are fragile and perishable. Always handle seedling packages and
seedlings with care. Ensure that seedling roots are always kept moist and do not allow
seedlings to freeze.
All bareroot trees and shrubs will be kept in cold storage until the time of planting.
Only those plants that can be planted within 1 day will be removed from storage.
These plants will be kept moist in their bags and in the shade until immediately before
planting.
Before planting, only remove those plants that can be planted within 1 hour of
removal from the shipping bag. Plant roots will always be kept moist at all times.
King Conservation District • Project Plan & Specifications — JSH Properties • May 2018
Page 9
Plants will be planted in holes wide enough and deep enough to allow the roots to
spread out naturally —no J or L rooting. Plants will be planted at the nursery soil level
(or no more than inch deeper). Planting holes will be backfilled with native soil and
the soil firmed gently around the roots to remove air pockets.
To maximize survival and growth, the following specifications will be followed:
• Read and follow instructions in the Appendix "Picking up at the nursery" in the
attached Oregon State University Extension Service publication "Selecting and
Buying Quality Seedlings".
• The contractor will pick up plants at a nursery. Record numbers and species of
plants and date received from nursery. Assure species, seed zones, and
numbers match the plan specifications listed in the Planting Plan.
• Place plants in local cold storage at 34°F to 39°F in closed seedling bags. Air
circulation must be adequate to draw off seedling metabolic heat (do not stack
bundles more than two bundles high). Plants in cold storage will be kept no
more than 30 days before planting. If possible, only those plants that can be
planted in a day will be removed from cold storage. Though less desirable,
plants can be out of cold storage for 2 days if kept shaded and cool (less than
50°F). If hardwood trees or shrubs are too large for closed bags, they will be
kept in a cool, shaded place (less than 50°F) and the roots will be kept moist
with the bags closed around them. Any large hardwood trees and shrubs not
in cold storage will be planted within 1 week of receipt from the nursery.
"Heeling in" may be an acceptable practice for trees and shrubs waiting for
planting in small projects.
Plant Installation
When installing plants, crews may want to rope up in areas where the slope is very
steep. The contractor installing the plants will need to follow their policies for working
on steep slopes and for wearing personal floatation devices (PFD) near the river. Crews
may need to rent a boat when installing stakes along Zone 1, adjacent to the river. It is
expected that crew work on this project will be time consuming due to the steep
nature of the slopes and the need to enact additional safety measures.
• TIMELINE & WEATHER CONDITIONS: Plant between January 10th and March
31 sL when soil moisture is abundant and when the trees and shrubs are
dormant. However, if the soil is saturated, postpone planting until conditions
are appropriate to avoid soil compaction during the planting process. Do not
plant if the projected high temperature for the day based on the local forecast
will be more than 50°F, unless it is raining. Do not plant if projected high is
Tess than 35°F. Avoid planting on dry, windy days.
g Ccnse vation [District 0 Project Plan & Specifications JSH P-oper-Jes 0 May 2018
Page 10
• BAREROOT PLANT TEMPERATURE: During planting, plant bundles will be
kept in a cool (less than 50°F), shaded place. Keep the seedlings moist -
especially the roots - at all times.
• ROOT MOISTURE: Plants will be planted from a planting bag using a tree
planting shovel or planting hoe. Dip seedlings in clean water for 1 minute just
prior to putting them in the planting bag. Root exposure to air, even for half a
minute on a dry day will lead to seedling mortality, especially for conifers. Do
not allow seedlings to sit in water for more than a minute.
• PLANTING BAG: Only place as many plants in the bag as can be planted in
one hour. Handle seedlings gently and do not overfill the planting bag.
Prepare the hole before removing the seedling from the bag. Only remove
one seedling at a time.
• REMOVE DEBRIS: Proceed through the planting zones removing sod (living or
dead), grass root mats, and dead blackberry canes, root balls, and roots from at
least a 10 to 12-inch diameter circle at each planting site throughout the
buffer.
• ROOT PLACEMENT: Plants should be planted in holes wide enough and deep
enough to allow the roots to spread out naturally —no J or L rooting.
• PLANTING DEPTH: Bare root seedlings will be planted to nursery soil depth
(or no more than l/z inch deeper) as indicated by the soil line on the
stem/trunk. See Figure 1, drawing 12 for a satisfactorily planted tree.
• SOIL: Planting holes should be backfilled with native soil and soil firmed
gently around the roots to remove air pockets. Do not compact soil.
E 7, Dittoing 1, gh 11 r.[tus ra i . holiv &shrtibslivold'r►ot ti chant & a 'idcai plalung is shown.
in drawing 12. e*
1E ROOM
Flok sks%6!. r+el
audsanra tsdslal
go ate
4AMNIEO coMTACf TOO SHALLOW
RQOTS ROOTS lieoti a}toird.
ekr loe o.r►oi. HOT tea ssrros� hair lee i'isex
Ind IWIIA
RMAO¢QUATT*RANTED N *SANTEE. ON NOT VERTICAL '.'
TAMPING it arum WOOD' 4?OMR Trer*ei &sue AIR R'OCE
ROM iglrr lloolt pcl bausy 'Wails to Todoil to d* ShmileiRitrOprr
loilrRoe to .goal 0.011 ,iltivow lieriranu3Ui#1 Ul$i
61 Rd. '17iindbfeaksfoirMontana:,a'iandOV►It
i.s
S'U'Exct. BA 366.
TOO IDI R
Needles blsrieQ;.
.fir Ox•, ft*
p diae poor
.ASATiSFAc—
TOSULT
PLANTED
'TREE
King Conservation District • Project Plan & Specifications — JSH Properties • May 2018
Page 11
Plant Spacing
• Bareroot Plants
o Bareroot plants are recommended for the large scope of this project
because they are very economical. Bareroots, when handled and
planted correctly, can be very successful. However, special care and
consideration must be followed during the plant selection, handling
and planting stages.
o Space bareroot shrubs 4' on center
o Space bareroot trees 8'-16' on center, depending on selected planting
plan (8'-16' apart from other trees, 4' apart from shrubs)
o Refer to the attached Planting Plan for recommended species spacing
• Stakes
o Space stakes 2' on center in 2-3 rows. Offset rows (Figure 1).
o Install stakes along all of zone 1 and the steepest slope of zone 2.
o Make a fresh, angled cut along the bottom of the stake immediately
before installing.
o Use rebar and a mallet to create holes in the soil if needed. Some soils
will not require rebar-created holes and stakes can be directly pushed
into the ground.
o Ensure 2/3 of stake is installed into the bank to prevent them from
washing away downstream.
Figure 1. Schematic for 2'on center layout of2 rows of stakes
•� •
Watering
Water installed plants weekly throughout the summer months for a minimum of 3
growing seasons after installation to assist plant establishment. This is particularly
important for tree species. There is an opportunity to engage the landowners in this
process and include this maintenance step as part of their responsibility. The
landowner can use hoses and sprinklers to water all installed plants, especially in areas
located in full sun and drier areas. Water all plants until the surrounding soil is
saturated. Tree watering bags may also be used and are easy for a landowner to
periodically fill.
Maintenance & Monitoring
Aggressive post plant weed control will be required to control the blackberry,
knotweed, ivy, Hawthorne, and any other invasive weeds growing in the riparian
King Conservation District • Project Plan & Specifications — JSH Properties • May 2018
Page 12
buffer. Perform weed control at least twice a year - once in the spring and once in the
late summer - until plants are established (3-5 years from initial planting).
Management methods will include minimizing competing grasses and invasive
vegetation throughout the buffer, especially the 3 feet surrounding each plant. This
can be done by spraying an approved herbicide, hand weeding, hand mowing, or a
combination of these.
• Contractor Monitoring
o Monitor the project site in the summer months to inform maintenance
activities required.
• Monitor for re -growth of blackberry, knotweed, ivy, and English
Hawthorne. Also monitor for other invasive weeds establishing
in the zone.
■ Report any new infestations of knotweed to King County
Noxious Weeds.
o Survivorship
it is important to sample vegetation for survivorship. Randomly sample
the project site using the line -intercept method and count total plants
alive and dead. At least 80% of plants should survive after planting. If
not, some replanting may be necessary.
■ Line -intercept method
• Randomly sample multiple 50' lines across the project
site.
• Determine total aerial coverage of native vegetation and
invasive vegetation.
o Conduct monitoring throughout the length of the grant cycle to ensure
project success.
• Contractor Maintenance
o Continual maintenance of project areas will ensure a successful project.
Any re -growth of blackberry, ivy, knotweed, or Hawthorne should be
dealt with as soon as possible. An herbicide application may be needed
the first maintenance season (Spring/Summer) after plants are installed.
o Refer to Project Implementation schedule for timing of maintenance
activities.
o Spot spray blackberry re -growth with aquatic approved herbicide.
o Infestations of Invasive Knotweed should be treated with herbicide until
the infestations are eradicated. Thorough monitoring for Knotweed
throughout the whole project area is recommended to ensure that new
infestations don't establish in other areas of the project.
o Use approved herbicides to cut/dab any regrowth of English Hawthorne
until all are eradicated. Monitor for new sprouts in the areas
surrounding treated Hawthorne.
Ching Conservation District Project Plan & Specifications — JSH Pro. erties c. May 2018
Page 13
o During the maintenance seasons, spray ivy regrowth with aquatic
approved herbicide. If manually removing ivy, keep the roots from
contacting any bare soil, as ivy can re -root into the soil.
• Replanting
o Replanting occurs if more than 20% of plants die throughout the
project site the first year.
o Replant all trees that die regardless of percent of total remaining
o Pay attention to which species are most successful in the project to
direct your replanting strategy.
o Survivorship is determined by monitoring line transects.
Canopy Thinning
• Thin i -d conifer trees when crown to height ratios i . e tree health
and growth rate • - optimally supported . practice. The landowner
will be responsible for thinni •s,. - -
• KCD is available to .. - on best "thinni •" • actices. Additionally, the City of
Tukwila -ed to advise regarding the allowabi i • inning in a critical
ea.
King Cof` sc,r'•'aill'on Pro ectPiarr :.��j3 c ficFt.,,o€i a May 2018
Section 2 - Location Maps
Tukwila Green the Gree
Project Overview Map
JSH Properties
KCD Piercer
Tukwfla Green the Green
Project != oundary Map
,JH Properties
Section 3 - Planting Plan and Cost Estimate
• Option 2: Trees Planted 12 feet on center
Planting Plan - JSH Properties
Option 2 - I'rees planted @ 12o.c. and shrubs planted @ 4' o.c.
IIrernorramq
. i'itgr=i1
O. pf 760
Project Description: t • T e proposed project will include Zones 1 - 5. The project will enhance 17-tee linear feet of the Lower Green River. This project has some
existing native vegetation throughout the site. There was a 100' restoration planting zone completed in the fall of 2016 in response to a slope failure. The project area has
already had some invasive control of knotweed by King County Noxious weeds. The goal of the project is to increase shade on the river by planting large trees.
Soil Type: No data, urban soils
Ta!ge s
Trees
12' oc
Livestake
or Shrub
olkil;1410
1,l4
iN 0
4,500 sq' (4-9' wide) This zone is steep, wet, and tidally influenced with an ordinary high-water line a few feet into the zone. There are
some locations with established willows and dogwood trees. Most of this zone has invasive Himalayan blackberry overhanging the river.
Treat the blackberry with herbicide and mow down or cut dead canes before planting. Install livestakes all along the river in 3 rows with
plants spaced 2 feet on center.Do not stake in areas that already have willows along the shore. Plant this zone with willow, dogwood,
j livestakes and ash bareroots. 3 rows of stakes 2'on center (o.c.)
andcottonwood
1
12,338 sq' (8-25' wide) The zone is very steeply sloped with a mix of full sun to partially shaded areas. The soil is mostly dry to moist since
this zone is perched above the river. This zone is tidally influenced during winter peak flow, and plants may be submerged for up to 3
months. There are a few existing deciduous trees sparsely spread throughout the zone. Invasive species present in this zone include
Himalayan blackberry and patches of invasive knotweed. There has been some treatment of the knotweed in this zone by King County
Noxious Weeds. Treat blackberry with herbicide and cut dead canes before planting.
Plant installation in this zone should include a mix of both wetter and dryer site plant species due to fluctuating water levels throughout the
year. Portions of this zone are submerged periodically throughout the winter and spring. In lower elevation areas closest to the river where
flooding is most present, install wetter site adpated live stake and bareroot trees and shrubs, and install live stake shrubs in the steepest
section of this zone, near the northern part of the property. Install drier site adapated bareroot trees and shrubs closer to the top of the bank
above inundation levels. In both cases, plant species that are tolerant to winter submersion and summer drought. Trees planted @ 12'
o.c.
5,338 sq' (8-17' wide) This zone runs adjacent to a walking trail at the top of the bank. The zone is mostly sunny and dry, with some areas
of partial shade next to established vegetation. There is currently dense, established ivy present in this zone, along with some blackberry
and knotweed. The ivy is up to 2 feet deep in some areas. Landscaping fabric has been placed beneath some of the ivy. Apply herbicide to
all ivy, blackberry, and knotweed in this zone. Cut all dead plants and leave on site.
Bareroot shrubs and groundcovers will be planted in this zone. Plant groundcovers and lower shrubs along trail. Set back taller species 6-8'
from trail. Taller species should be planted in the northern and lower (downslope) portion of this zone to allow for access to be maintained
along the trail.
11100000000000040000
00001100001111
ologliliglIlllji,I,I,(I
5,658 sq' (22-31' wide) This zone is in full sun with a moderately steep slope. The conditions are dry in the top portion of this zone. The
walking trail runs along the top of the bank, adjacent to this zone. There are small patches of dogwood along the toe of the slope.
Himalayan blackberry has overrun most of this zone. Install bareroot trees and shrubs that can tolerate full sun and dry soil conditions.
Trees planted @ 16' 0.c.
• :93 sq' This zone has a well -established tree canopy and understory shrubs with some extremely steep slo e
JJJdeciduous, so - .- • -nted in the understory around the ed. - 0- - - - - . ng FifTfawthorne trees that will be
I' [ g treated with herbicide. Leave trees on ' . -rve--... .-”z",4 44 - . . • • ovide wildlife habitat. Along the west portion of this zone, there
a • an near the sidewalk. Planting will occur along the top o - •: .- ..- a a ce near the treated English
, 85
1 OM Hawthorne trees. Conifer trees and shrubs will be planted in this area on the top of the bank. Trees planted @ 1 oc.
, oitigi),, J
2,620 sq' After a slope failure, an engineering firmwas brought in to mitigate the damage and stabilize the slope. This zone was planted in
2016. Fill material was added to the slope and drains were redirected to the toe of the slope. No additional work is needed here, but there
should be monitoring of the cracks along the top of the bank in this zone.
Legend
EJ JSH Property Boundary
Zone 1 - Tidal/Wet Zone; Edge of River
1 Zone 2 - Steep Slope; Use Stakes
• Zone 3 - Ivy Hedge
Zone 4 - Dry, Sunny, Blackberry
Tukwila Green the Green
Planting Zones Map
JSH Properties
KCD Planner Kristen Reetardt
Coprght '92017 K,ng C,onservabon 1.1e,e let
October 19 2011
• .pfame), yifA: nsi‘rir
T =iDrt.o.
exa -Re; 0`
•
•
tiosem"%messieus
Planting Plan -JSH Properties
wet r-or_preeissts,eterteet&pelec,
ctessrscsO,Pcpulai lesabscr00,.
.asSac,sa Maasa.a.ola,
aad Cate ire* RS.,
Trees -Ofsse
le
IS
7 1.4.4.4
1ossetki1 sun /2,c.
Wstincia
IS W.,. .1.404.0 scc
8. CPO tips Ijscef ssoseestryPon-
Osualacts,
15
Mo.., NS to sm. sat
'Zoe
Sias. YAWN
Pacific nes.. IffSseccernss
la.,01AossalsoCaTS,
Oases pcossel iC'ssmus sencse
slacsa, Pcaric asta soccer
$lastasascacfaccal
ihncOs -Cele
*VA. (Gar, - OrnistS
Moats mikiss01
SOW itloksIstsoc crscokai
1.1S*01,9 ccssAs.,1
SarAcchany comma *00
SnoSobelreS s atc,
Vac tkcia oecoutuno
sox [a+aaor nervoaa
54. (4......41.4
9.aa
900 SP
110
370
vflSata
SD
I a
ale
150
[ISO
ICS
ICC
sap
SC Veciinnsist
Weafal sta
leeet,n41 Sys
1C0
SS PR,* sun
Sta., 4.4 stin
0,afaisaaartshasaaat
, IstaisRadstRal
a" Naas acc aon
'DU
anadatpartsan
Cacc
save
sea rtas,
cs510,,Ses
S. cc
nat.. new
cv
Coo
CC,
1...ies
atataarla
allakar,
M-at saWS rvorfibm4,119,
TOPOGRAPHIC SURVEY , dusk,- -trees
frct,4if actirvf
1/41- \ , SLC 23 T 233 N R4F,A 1/4 kree5
KiN6 3,3INT WASHINGTON
NA,W cffrak.fr
ero+Pf Yrc"'
14-;44 bct;11\-,fi,
;rs 11/4,as orrA
e, isc-P f.A61-4 7
El
„.;
Note: refer to KCD Riparian Enhancement Project Plan for infomatiuon on zones and plant material.
Plant layout to be coordinated in the field at the direction of the Engineer.
Planting Plan - JSH Properties
Option 2 - Trees planted @ 12' o.c. and shrubs planted @ 4' o.c.
f.ffif.p.r...fitiffp
OlahislINNO016106M
Type
Species
Total
Zone
1A
Zone
1B
Zone 2
Zone 3
Zone 4
Moisture, Sunlight
Spacing
Cluster
Trees - Wetter
Black cottonwood (Populus trichocarpa)
6
3
3
Wet/moist; Full to partial sun
12oc
Oregon Ash (Fraxinus latifolia)
16
2
1
3
10
Wet/moist; Full sun
12' oc
Western Red Cedar (Thuja plicata)
19
9
10
Wet/moist, full shade/part sun
12' oc
Trees - Drier
Big Leaf Maple (Acer macrophyllum)
14
9
5
Moist/dry; Full to partial sun
12' oc
Douglas fir (Pseudotsuga menziesh)
24
9
15
Moist/dry, sun/shade
12' oc
Trees Total
79
5
4
30
0
40
Shrubs - Wetter
Pacific ninebark (Physocarpus capitatus)
200
150
50
Wet/moist, full sun
4' oc
Peafruited Rose (Rosa pisocarpa)
125
125
Moist, full sun
4' oc
Red Osier Dogwood (Comus sertcea)
300
70
30
150
50
Wet/moist, part shade/full sun
2' oc
VVillow, Pacific (Salix lasiandra)
170
120
50
Wet, full sun
2' oc
lowest row
VVillow, Sitka (Salix sitchensis)
370
190
80
100
Wet, full sun
2' oc
next 2 rows
Wet Sub Total
380
160
525
0
100
Shrubs - Drier
Hazelnut (Corylus cornuta)
0
Moist/Dry, part shade/part sun
4' oc
Mock Orange (Phyladelphus lewisii)
65
20
45
Moist, part shade/part sun
4' oc
dn't blk view
Nootka Rose (Rosa nutkana)
50
50
Moist/dry, full sun
4' oc
Ocean Spray (Holodiscus discolor)
65
20
45
Dry/Moist, part shade/part sun
4' oc
dn't blk view
Red Flowering Current (Ribes sanguineum)
40
25
15
Dry/Moist, part shade/full sun
4' oc
dn't blk view
Serviceberry (Amalanchter alnifolia)
0
Moist/Dry, full sun
4' oc
Snowberry (Symphoricarpos albus)
275
125
100
50
Moist/dry, part shade/full sun
4' oc
dn't blk view
Vine Maple (Acer circ natum)
55
40
5
10
Moist, part shade/part sun
4' oc
dn't blk view
Dry Sub Total
0
0
165
170
215
Shrubs Total 1715
380
160
690
170
315
Groundcover
Low Oregon Grape (Mahonia nervosa)
140
140
Dry/Moist, shade/part sun
2' oc
2 rws/trail
Salal (Gaultheria shallon)
140
140
Dry/Moist, shade/part sun
2' oc
2 rws/trail
Sword Fern (Polystichum munitum)
140
140
Moist, full shade/part sun
2' oc
2 rws/trail
Groundcover Total
420
0
0
0
420
0
TOTAL Plants 2214
385
164
720
590
366
Section 4 - Appendices
0
�
������w�
What Are Bareroot Plants?
BareroUtrees and shrubs are Jtype ofnursery stock that isdelivered without soil Ora pot around the roots. These plants are grown
innursery beds, lifted from the ground while dormant and shipped inbags. Bareroot trees and shrubs should beplanted before the
buds open iOspring.
When selecting plants for aproject, [hOmep|antsgmwnfrnmaed0Up{tedinwestemWbshingtnnund8vVidp|ants from the east
side of the state or country. Plants grown from western Washington or Oregon seed sources are better adapted Nthe growing condi-
tions inKing{Ounty.
Keep plants cool and roots moist until planted. Moisten roots with water and store in a shaded location or refrigerator.
�'g i Nf R�"
Scalp atwo foot circle inplanting area, removing all sod and weeds.
Dig ahole wide enough and deep enough for roots k>spread out. Remember that roots grow
down and laterally.
Mound some soil inthe center Ofthe planting hole. Drape roots over the mound.
Position the roots mthey hang down over the mound and are not turned upor
crowded.
Plant trees and shrubs inthe depth they were planted inthe nursery. The junction ofthe
stem and root should belevel with the ground.
Back fill the planting hole with loose soil and gently pack the surface after filling the hole.
Build aberm around the planting hole tohold water.
Water the plant thoroughly after backfilling the planting hole to eliminate any remaining air
aibwtedbwKing Conservation District ^ 1:107 SW Grady Way, Suite 130^ Renton, WA 98057 ^ 425-282-1900^
`
Straw Wattle Installation
Proper installation of the straw wattle is eaaenho| in order to insure the success of the product.
8inavv xvott|ea are designed for |ovv surface Oovva, not to exceed 1 ofa for annaU areas. While they
work well on stream banks, they should not be placed in the path of high water flow. On m|opeo,
wattles should be installed on contour with u o|iOht downward angle at the end of the row in order to
prevent ponding at the mid -section. No overall slope preparation is needed prior to installation;
hovvever, straw wattles should e|vveya be installed in ehoUovv trenches according to the guidelines
given below. Running lengths of wattles should be abutted firmly to mneuno no leakage at the
abutments. Guidelines regarding vertical spacing one given below. The wattles should be pinned
securely to the ground according to instructions in order to insure their stability and the success of
the installation.
SPACING -0OWNSLOPE
Vmdicm| spacing for slope installations should be determined by site
conditions: slope gradient and soil type are the main factors.
/&good rule -of -thumb is:
° 1:1slopes =1Ofeet apart
° 2:1slopes =2Ofeet apart
~ 3:1 slopes = 3Ofeet apart
w 4:1 a|upeo =4Ufeet apart, etc.
However, adjustments may have tmbemade for the soil type:
* For soft, |oenny soils - adjust the rows closer together.
p For hard, rocky soils - adjust the rows further apart.
TRENCHING
Use ahand tool such as a maddox or pick to score the ground. Using ashovel, dig the trench to the
needed depth. Soil from excavating the trenches can be placed on the uphiU, or flow oide, of the
trench to beused during installation.
* For soft, loamy soils: dig o3-5inch trench.
* For hard, rocky soils: dig o2-3inch trench.
INSTALLING
Lay the first straw wattle snugly in the trench. No daylight should be seen under the wattle. Pack
soil from trenching against the wattle on the uphill side. When installing running lengths of straw
wmtt|em, you must butt the second wattle iiqhdy against the first wattle. DO NOT overlap the ends
on top of each other' Overlapping behind each other has been done with some success. Stake
the straw wattles oteach end and four foot oncenter.
For example:
° 25foot wattle uses Ostakes
° 2Ofoot wattle uses 5stakes
° 12foot wattle uses 4stakes
Stakes should bedriven through the middle of the wattle, leaving 2-3inches of the stake protruding
above the vvetUm. A heavy sediment load will tend to pick the wattle up and could pull it off the
stakes if they are driven down tom |mvv. It may be necessary to rnmkm a hole in the wattle with the
pick end ofyour rnaddmx in order to get the stake through the straw. When straw wattles are used
for flat ground mpp|ioationa, drive the stakes straight down; when installing vvatt|ao on e|opeo, drive
the stakes perpendicular tothe slope.
Drive the first end stake ofthe second wattle atonangle toward the first wattle inorder tohelp abut
them tightly together. If you have difficulty driving the stake into ex±nennm|y hard or rocky a|opeo, a
pilot bar may beneeded 10begin the stake hole.
|
FLAT GROUND APPLICATIONS
For installations along sidewalks or behind curbs it may not be necessary to stake the wattles,
however, trenches must still be dug. If you have not yet back -filled behind the sidewalk or curb, lay
the wattle snuggly against it first, then backfill behind the wattle. Your trench is done! For
installations around storm drains and inlets, trenches and staking will be needed.
Fit wattle in trench snugly up against the sidewalk or curb. Around storm drains or inlets, the wattle
should be back 1-1% ft. and should direct water flow toward the angle of drainage. If all drainage
angles into the inlet, snake the wattle all the way around the inlet, using more than one wattle if
needed.
STAKING
We recommend using wood stakes or willow cuttings, rather than metal pins, to secure the straw
wattles. Wood stakes will eventually bio-degrade, and willow cuttings will grow and provide extra
stabilization. Be sure to use a stake that is long enough to protrude several inches above the wattle:
18" is a good length for hard, rocky soil. For soft, loamy soil use a 24" stake for greater security.
The diameter of the stake should be approximately 1" for ease of driving through the wattle.
Straw Polls Must
Be Placed Along
Slope Contours
10%25° (3-8m)
Spacing Depends
an Soil Type and
Slope Steepness
Live Stake ,„;„
,4
not to scale
131-41
1-11
(1,2m)
//,';
/•/
7,
Adjacent rolls shall
tightly abut
ediment, organic matter,
and native s are
captured behind the rolls,
3^-5" (75-125mm)
8'-10" DOA
(200 2,50rnm)
1" X 1" Stake
(25 x 25mrn)
NOTE
I . Straw roll Installation requires the placement alld SCCUre staking &Me roll in 'A Trench, 3'-5" (75-125mm)
deep, dug on contour., runoff must not be allowed to run under or around roil,
2
BY: FERN LIDDELL
ALLOWABLE ALTERNATIVE
TIE -DOWN METHOD
STAGGER 0
8" DIAMETER
WATTLE SPACING TABLE
SLOPE
MAXIMUM SPACING
1H:1V
10'-0"
2H:1V
20'-0"
3H:1V
30'-0"
4H:1V
40'-0"
PLAN VIEW
/ CONTOUR LINE (TYP.)
Jai
ANGLE TERMINAL END UPHILL 24" TO 48"
TO PREVENT FLOW AROUND WATTLE
(TYP.)
WATTLE
TRENCH - SEE NOTE 1
2" 2" 24' WOODEN
STAKE (TYP.)
zl
AREA AVAILABLE FOR SEDIMENT
TRAPPING (III, )
SECTION
2 + 2" + 24" UN -TREATED
WOODEN STAKE (TYP.)
nr
8" DIAMETER
MINIMUM
WATTLE DETAIL
SPACING VARIES - SEE WATTLE
SPACING TABLE (TYP.)
WATTLE INSTALLATION ON SLOPES
NOTES
1. Wattles shall be in accordance with Standard Specification
9-14.5(5). Install Wattles along contours. Installation shall
be in accordance with Standard Specification 8-01.3(10).
2. Securely knot each end of Wattle. Overlap adjacent Wattle
ends 12" behind one another and securely tie together.
3. Compact excavated soil and trenches to prevent undercutting.
Additional staking may be necessary to prevent undercutting.
4. Install Wattle perpendicular to flow along contours.
5. Wattles shall be inspected regularly, and immediately after
a rainfall produces runoff, to ensure they remain thoroughly
entrenched and in contact with the soil.
6. Perform maintenance in accordance with Standard Speci-
fication 8-01.3(15).
7. Refer to Standard Specification 8-01.3(16) for removal.
WATTLE (TYP.) -
SEE DETAIL
STATE OF
WASHINGTON
REGISTERED
LANDSCAPE ARCHITECT
Sandra L. Salisbury
SANDRA L. SAUSBURY
LICENSE NO. 860
TE: June 10, 2013
OF
WATTLE INSTALLATION
ON SLOPE
STANDARD PLAN 1-30.30-01
SHEET 1 OF 1 SHEET
APPROVED FOR PUBLICATION
Pasco Bakotich 111 6✓10/13
AIMP, STATE DESIGN EA,GIMEEF SAn
7 WmhIngbn Slob Dpor.m.n1 of Tnartsporlotion
NOTES:
•
• PLANT SO THAT TOP OF
ROOT BALL IS EVEN WITH
THE FINISHED GRADE
• SCARIFY SIDES OF
PLANTING PITS S PRIOR TO
t3AC KFILUNG
• LOOSEN ROOTBALL,
STRAIGHTEN OR PRUNE
ENCIRCLING ROOTS ON
ALL CONTAINER PLANTS
Tnel
PLANTING HOLE TO BE
2 X DIA. OF ROOTBALL
SHRUB ON SLOPE PLANTING
SCALE: 1 /2" =1'-0"
FORM SAUCER WITH 3"
HIGH CONTINUOUS RIM,
DOWNHILL SIDE ONLY
` MULCH, KEEP MULCH
AWAY FROM TRUNK
FINISH GRADE
NA- Vr SOIL, 5.Acrt,=`t..t,
EXISTING SUBGRADE
CV ..1.1 L WI SCtLWATER AND
TAMP TO REMOVE AIR
POCKETS