21-100017 Final Mitigation Plan 07-19-2021 NEW
FINAL MITIGATION PLAN
for
Reasonable Use Permit
P & M Development Parcels
PARCEL # 1421039069, 1421039087, & 1421039043
33305 43rd Avenue Southwest and adjacent east
CITY OF FEDERAL WAY, WASHINGTON
City File folders #20-104505, 21-100016, 21-100-17
Prepared for:
Ms. Michelle Henry, PE
P & M Development LLC
35001 NE 147TH AVE
Yacolt, WA 98675
p.m.development@outlook.com
360-281-8195
Prepared by
Beaver Creek Environmental Services
POB 731695
Puyallup, WA 98373
253 732-6515
MHeckert@Q.com
July 16, 2021
EXECUTIVE SUMMARY
The P&M development, 33305 43rd Avenue Southwest and adjacent east (parcel #s
1421039069, 1421039087, & 1421039043) is located generally west of Hoyt Rd. SW, in
the City of Federal Way, Washington. The project site is three parcels approximately
73,495 sq. ft.(1.7 acre). The site is bounded on the south, east, and west by residential
development, and on the north by a vacant parcel. The site is vacant of development.
As part of the site planning process an assessment of the project site was completed
following the procedures outlined in the Washington State Wetlands Identification and
Delineation Manual (Wash. Manual) and the Corps of Engineers Wetland Delineation
Manual (2010 Supplement). Drainage corridors were also assessed in accordance with
the criteria established by the City of Federal Way and the State of Washington
Department of Natural Resources (WDNR) Forest Practice Rules (WAC 222 -16-030).
These assessment activities resulted in the identification of one wetland area and one
stream (See Wetland and Drainage Corridor Evaluation and Delineation Report and
Conceptual Mitigation Plan for Reasonable Use exception, P&M Development , BCES,
July 16, 2021). The site is totally encumbered by wetlands, stream, and their buffers.
The selected site development actions for this project site is the development of three
single-family residences consistent with the City of Federal Way comprehensive plan and
local land use zoning. Through site planning the project team has been able to design
the house and associated utilities and access to avoid adversely impacting the identified
onsite wetlands or stream. However, to obtain reasonable use of the parcels to
accommodate single-family houses, the buffer of the on-site wetland and the stream will
be reduced. To mitigate for the encroachment into the standard buffer, the reduced buffer
area will be revegetated with native trees and shrubs.
TABLE OF CONTENTS
INTRODUCTION............................................................................................................. 1
STUDY PURPOSE ......................................................................................................... 1
SITE DESCRIPTION ..................................................................................................... 1
MITIGATION PLAN ....................................................................................................... 1
DESCRIPTION OF THE MITIGATION PROGRAM ................................................... 3
GOAL AND OBJECTIVE OF THE MITIGATION PLAN ........................................... 4
SELECTED PLANT COMMUNITIES .......................................................................... 5
RESTORATION PLANTING GUIDELINES ............................................................... 7
CONSTRUCTION INSPECTION ................................................................................. 8
MITIGATION CONSTRUCTION SCHEDULE ........................................................... 9
STANDARDS OF SUCCESS ........................................................................................ 9
Vegetation Sampling Methodology and Monitoring Schedule ................................... 9
Vegetation Monitoring ................................................................................................ 9
WILDLIFE OBSERVATIONS .................................................................................... 11
COVERAGE FOR EXPOSED BUFFER AREA .......................................................... 11
CONTINGENCY PLAN .............................................................................................. 11
PLANTING NOTES ..................................................................................................... 12
REFERENCE LIST ........................................................................................................ 13
ATTACHMENT 1 - Bond Quantity Worksheet…….……………………………….......15
ATTACHMENT 2 - Site Plan C. 1………………………………………………………16
ATTACHMENT 3 – Mitigation Plan Drawing………...………………………………..17
STANDARD OF CARE
Prior to extensive site planning, this document should be reviewed and the wetland
boundaries verified by the appropriate resource and permitting agencies. Wetland
boundaries, wetland classifications, wetland ratings, proposed buffers, and proposed
compensatory mitigation should be reviewed and approved by City of Federal Way
Planning dept. personnel and potentially other resource agency staff. BCES has provided
professional services that are in accordance with the degree of care and skill generally
accepted in the nature of the work accomplished. No other warranties are expressed or
implied. BCES is not responsible for design costs incurred before this document is
approved by the appropriate resource and permitting agencies.
Mark Heckert
Beaver Creek Environmental Services [BCES]
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P&M FedWay Mitigation Plan
INTRODUCTION
This report details activities to mitigate for unavoidable impacts to regulated City of Federal
Way Environmentally Critical Areas as an initial element of the site planning process for
the P&M DEVELOPMENT (Parcel #s 1421039069, 1421039087, & 1421039043 ). The
project site is three parcels, approximately 73,495 sq. ft.. The site is bounded on the south,
east, and west by residential development, and on the north by a vacant parcel. The site
is vacant of development.
STUDY PURPOSE
This purpose of this document is to present the plan for mitigation of unavoidable impacts
to the regulated wetland buffer within the project site. This study was designed to
accommodate site planning and potential regulatory actions. This report is suitable for
submittal to federal, state, and local authorities for wetland boundary verification and
permitting actions.
SITE DESCRIPTION
The site is irregular, approximately 1.7 ac., sloping to the north throughout, and located
within an urbanizing area of the City of Federal Way.
Movement of surface water runoff across the site is generally to the north to the stream
(Joes Cr.), and to the wetland. The majority of onsite surface water runoff pools on-site
and infiltrates.
MITIGATION PLAN
The selected site development action for the P&M Development is the development of
three single-family residences consistent with the City of Federal Way comprehensive plan
and local land use zoning. The creation of these residences will include the establishment
of houses and internal access for driveway and utilities. Through site planning the project
team has been able to design the homesite and associated utilities to avoid adversely
impacting the identified onsite wetland and stream. The standard buffer of the stream and
wetland must be reduced to accommodate reasonable use of the site.
Mitigation Sequencing: Mitigation planning for this site followed standard and accepted
mitigation sequencing protocol of Avoidance, Minimization, Mitigation. The development
cannot be avoided to obtain use of the parcels. The development is minimized by siting
the development as far to the south boundary as possible, in an area of previous impact.
The development envelopes are minimized, and accessed through a common access.
Planting is proposed for all unvegetated areas, resulting in the greatest mitigation possible
on the site.
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P&M FedWay Mitigation Plan
An encroachment into the identified buffer for the on-site wetland and stream is required
to establish the home sites. The proposed development is the minimum required to
achieve reasonable use of the site. The development is situated as far from the wetland
and stream as practicable.
Mitigation for the required buffer impact at the eastern boundary of the project site will be
provided by re planting the retained buffer, as well as the Flow Control BMP Vegetated
Flow Paths (FCVFP) and the areas would be planted with a variety of native trees and
shrubs. Wetland enhancement was also proposed as additional mitigation for the
required buffer reduction. This was disallowed be the City reviewer.
Through this compensatory mitigation the development would not result in a “net loss” of
regulated wetland area, function, or value consistent with City of Federal Way Zoning
Code.
Impact Area Analysis – (in sq. ft.)
Area Development
Impact Mitigation
Enhancement Mitigation ratio
PARCEL A 3,250
A FCVFP 7,250
PARCEL B 2,900
B FCVFP
PARCEL C 3,350
C FCVFP 1,515
MITIGATION
ENHANCEMENT AREA 8,472
TOTAL 9,500 17,237 1.8 : 1
The Mitigation Enhancement Area and the FCVFPs are areas of fill placed on presumably
wetland many years prior. The FCVFPs will be channeling stormwater thru the sites to
the wetland. As such, a matrix of FAC, FACU, and FACW species are proposed to
vegetate what may be a complex water regime.
Fencing: A fence will be installed at the southern reduced buffer boundary of the wetland
and stream. City of Federal Way wetland buffer boundary will be attached on every third
post. No further activity will occur within the fenced area once enhancement planting is
complete.
The existing wetland in the interior of the site has been degraded by prior filling and
clearing of vegetation.
Potential impacts to habitat from the development are:
1). Short-term construction disruption. This impact will be mitigated thru the
placement of silt fence barriers in every area which may flow into the wetland and
stream (see P&M development Site Civil Plans, erosion control Plan) and oversight
by the project biologist during construction. The project biologist will observe and
consult with construction crews during construction to ensure compliance with best
management practices during the excavation of the buffer area.
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P&M FedWay Mitigation Plan
2). Long-term impacts from development:
a). Permanent loss of habitat area. There will be no functional loss of habitat area.
The present wetland and buffer in the mitigation area is poor functional. Functional
buffer area will increase as a result of installation of trees.
b). Loss of habitat utility due to light and noise from the development and
increased visitation by people. Lighting of the developed area will increase “spill-
over” of light to the mitigated buffer and wetland. All lighting will be directed away
from the mitigation area. A boundary planting of shrubs will be placed within the
retained buffer to provide light and auditory shading. The boundary fence will be
a 2-post cedar fence to inhibit intrusion by people.
MITIGATION FUNCTIONAL COMPARISON
ENVIRONMENTAL FUNCTION EXISTING PROPOSED
Hydrological Support Function Low Moderate
Stormwater Storage Function High High
Floodwater Storage Function High High
Water Quality Function Moderate High
Groundwater Recharge Function Moderate Moderate
Natural Biological Functions Moderate High
Education and Recreational
Opportunities
Low Low
Threatened and Endangered Species Moderate High
(after Adamus et al. 1987: Reppert et al. 1979)
DESCRIPTION OF THE MITIGATION PROGRAM
1. As mitigation for the unavoidable impact to 9,500 sq. ft. of City of Federal Way
regulated Category 2 Wetland and Type F Stream buffers at the north boundary of the
project site, the retained buffer of 8,472 sq. ft. will be restored with native trees and
shrubs. The Flow Control BMP Vegetated Flow Paths (FCVFP) of 8,765 sq. ft. will be
enhanced with native shrubs (attachment). The upland area to be enhanced is
presently dominated by reed canarygrass. The FCVFP areas to be enhanced will be
cleared of exotic species and planted with native shrubs around existing vegetation.
Supportive hydrology will continue to be provided by the existing stream corridor.
Additional hydrology will be supplied by storm drains to the FCVFP areas. FCVFP
areas will be hydroseeded with wetland buffer emergents.
2. Temporary and long-term erosion control measures will be implemented (see P&M
development Site Civil Plans erosion control Plan). These measures include silt
fencing during site preparation and buffer enhancement, retention of all possible
existing vegetation and planting of new vegetation.
3. All onsite activities will be monitored by the project biologist. Following the completion
of onsite planting activities a "record-drawing" plan will be prepared and submitted to
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P&M FedWay Mitigation Plan
City of Federal Way. A five-year monitoring program will be undertaken to assure the
success of the buffer enhancement program. A series of financial guarantees will also
be implemented to assure that the proposed work is completed and is successful.
4. The outer boundaries of the established buffer tract would be marked with standard
City of Federal Way buffer boundary signs. The buffer boundaries will be fenced to
limit human intrusions between the upland boundary of the remaining buffer and th e
developed portion of the site. In addition, the project team will remove the trash,
debris, and invasive shrubs within the retained wetland and buffer areas.
5. Wetland, stream and buffer vegetation cleared or otherwise damaged during the
installation of the mitigation plan shall be revegetated with appropriate native plants
installed at an appropriate density to restore the damaged condition. These plants
shall be subject to the same performance standards indicated in the mitigation plan.
GOAL AND OBJECTIVE OF THE MITIGATION PLAN
The GOAL of the Mitigation Plan is to fully compensate for the unavoidable adverse
impact to regulated buffer areas. Upon the completion of this mitigation plan there will be
no net loss of wetland acreage, functions, or values; and an increase in the potential for
the buffer to protect aquatic habitats.
To achieve the defined GOAL, the following OBJECTIVES and PERFORMANCE
CRITERIA have been established to apply to the compensatory mitigation wetland area.:
Objective A. The retained & enhanced buffer area will total 8,472 sq. ft. and be
located directly north of the houses. The enhanced buffer will be hydrologically connected
to the adjacent City of Federal Way Category II wetland. The enhanced buffer area will
exhibit a scrub/shrub vegetation classes within five years following initial planting.
Performance Criterion #A1: As defined by plant counts 100% of the shrubs
installed as a part of the initial planting phase will be alive at the end of the first
growing season.
Performance Criterion #A2: As defined by plant counts 80% of the shrubs
installed as a part of the initial planting phase will be alive at the end of the fifth
growing season.
Performance Criterion #A3: As defined by aerial cover, invasives will cover less
than 10% of the planting area in any one year.
Objective B. The Flow Control BMP Vegetated Flow Paths (FCVFP) of 8,765 sq.
ft. will be located adjacent to the houses. The FCVFP will be hydrologically connected to
the City of Federal Way Category II wetland. The enhanced FCVFP areas will exhibit a
shrub vegetation class within five years following initial planting.
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P&M FedWay Mitigation Plan
Performance Criterion #B1: As defined by plant counts 100% of the shrubs
installed as a part of the initial planting phase will be alive at the end of the first
growing season.
Performance Criterion #B2: As defined by plant counts 80% of the shrubs
installed as a part of the initial planting phase will be alive at the end of the fifth
growing season.
Performance Criterion #B3: As defined by aerial cover, invasives will cover less
than 10% of the planting area in any one year.
SELECTED PLANT COMMUNITIES
The plant communities and plants selected for the created wetland and buffer areas will
be obtained as nursery stock. These selected species are native and commonly occur in
the local area. The plant species prescribed are selected to increase plant diversity,
match present onsite communities, increase wildlife habitats, and enhance the aquatic
environment. Plantings will be located as depicted on the attached P&M Development
Mitigation Plan drawing. The overlapping areas of the Mitigation Enhancement Area and
the FCVFPs will be planted as Mitigation Enhancement Area.
MITIGATION ENHANCEMENT PLANTING AREA: RETAINED BUFFER – 8,472 sq. ft.
@ 0.012/sq. ft. = 102 trees
COMMON NAME
SCIENTIFIC NAME
LOCATION PROPOSED
SPACING (oc)
PROPOSED
SIZE
INDICATOR
STATUS
15 Western red cedar (THP)
Thuja plicata
Buffer 9 ft 4 ft height
minimum
FAC
15 Sitka spruce (PIS)
Picea sitchensis
Buffer 9 ft 4 ft height
minimum
FAC
15 Oregon ash (FRL)
Fraxinus latifolia
Buffer 9 ft 4 ft height
minimum
FACW
15 Western Paper Birch(BEP)
Betula papyrifera
Buffer 9 ft 4 ft height
minimum
FAC
15 Scouler willow(SAC)
Salix scouleriana
Buffer 9 ft 4 ft height
minimum
FAC
15 Cascara (RAP)
Rhamnus purshiana
Buffer 9 ft 4 ft height
minimum
FAC
15 Western (black) hawthorne(CRD)
Crataegus douglasii
Buffer 9 ft 4 ft height
minimum
FAC
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P&M FedWay Mitigation Plan
8,472 sq. ft. @ 0.028/sq. ft. = 237 shrubs
COMMON NAME
SCIENTIFIC NAME
LOCATION PROPOSED
SPACING (oc)
PROPOSED
SIZE
INDICATOR
STATUS
22 Western crabapple (PYF)
Pyrus fusca
Buffer 6 ft 2 gal FACW
22 Vine maple (ACC)
Acer circinatum
Buffer 6 ft 2 gal FACU
22 Wild rose (ROG)
Rosa gymnocarpa
Buffer 6 ft 2 gal FACU
22 Black twinberry (LOI)
Lonicera involucrata
Buffer 6 ft 2 gal FAC+
22 Pacific ninebark (PHC)
Physocarpus capitatus
Buffer 6 ft 2 gal FACW-
22 Hazelnut (COC)
Corylus cornuta
Buffer 6 ft 2 gal FACU
22 Red-osier dogwood(COS)
Cornus stolonifera
Buffer 6 ft 2 gal FACW
22 Wild Gooseberry(RID)
Ribes divaricatum
Buffer 6 ft 2 gal FAC
22 Nootka Rose(RON)
Rose nutkana
Buffer 6 ft 2 gal FAC
22 Stink currant(RIB)
Ribes bracteosum
Buffer 6 ft 2 gal FAC
22 Thimbleberry(RUP)
Rubus parviflorus
Buffer 6 ft 2 gal FAC-
FCVFP 1 PLANTING AREA: – 1,500 sq. ft. @ 0.028/sq. ft. = 42 shrubs
COMMON NAME
SCIENTIFIC NAME
LOCATION PROPOSED
SPACING (oc)
PROPOSED
SIZE
INDICATOR
STATUS
7 Western crabapple (PYF)
Pyrus fusca
FCVFP 6 ft 2 gal FACW
7 Vine maple (ACC)
Acer circinatum
FCVFP 6 ft 2 gal FACU
7 Wild rose (ROG)
Rosa gymnocarpa
FCVFP 6 ft 2 gal FACU
7 Black twinberry (LOI)
Lonicera involucrata
FCVFP 6 ft 2 gal FAC+
7 Pacific ninebark (PHC)
Physocarpus capitatus
FCVFP 6 ft 2 gal FACW-
7 Hazelnut (COC)
Corylus cornuta
FCVFP 6 ft 2 gal FACU
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P&M FedWay Mitigation Plan
FCVFP 2 PLANTING AREA: – 5,750 sq. ft. @ 0.028/sq. ft. = 161 shrubs
COMMON NAME
SCIENTIFIC NAME
LOCATION PROPOSED
SPACING (oc)
PROPOSED
SIZE
INDICATOR
STATUS
15 Western crabapple (PYF)
Pyrus fusca
FCVFP 6 ft 2 gal FACW
15 Vine maple (ACC)
Acer circinatum
FCVFP 6 ft 2 gal FACU
15 Wild rose (ROG)
Rosa gymnocarpa
FCVFP 6 ft 2 gal FACU
15 Black twinberry (LOI)
Lonicera involucrata
FCVFP 6 ft 2 gal FAC+
15 Pacific ninebark (PHC)
Physocarpus capitatus
FCVFP 6 ft 2 gal FACW-
15 Hazelnut (COC)
Corylus cornuta
FCVFP 6 ft 2 gal FACU
15 Red-osier dogwood(COS)
Cornus stolonifera
FCVFP 6 ft 2 gal FACW
15 Wild Gooseberry(RID)
Ribes divaricatum
FCVFP 6 ft 2 gal FAC
15 Nootka Rose(RON)
Rose nutkana
FCVFP 6 ft 2 gal FAC
15 Stink currant(RIB)
Ribes bracteosum
FCVFP 6 ft 2 gal FAC
15 Thimbleberry(RUP)
Rubus parviflorus
FCVFP 6 ft 2 gal FAC-
FCVFP 3 PLANTING AREA: – 1,515 sq. ft. @ 0.028/sq. ft. = 42 shrubs
COMMON NAME
SCIENTIFIC NAME
LOCATION PROPOSED
SPACING (oc)
PROPOSED
SIZE
INDICATOR
STATUS
6 Western crabapple (PYF)
Pyrus fusca
Buffer 6 ft 2 gal FACW
6 Vine maple (ACC)
Acer circinatum
Buffer 6 ft 2 gal FACU
6 Wild rose (ROG)
Rosa gymnocarpa
Buffer 6 ft 2 gal FACU
6 Black twinberry (LOI)
Lonicera involucrata
Buffer 6 ft 2 gal FAC+
6 Hazelnut (COC)
Corylus cornuta
Buffer 6 ft 2 gal FACU
6 Red-osier dogwood(COS)
Cornus stolonifera
Buffer 6 ft 2 gal FACW
6 Thimbleberry(RUP)
Rubus parviflorus
Buffer 6 ft 2 gal FAC-
ENHANCEMENT PLANTING GUIDELINES
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P&M FedWay Mitigation Plan
1. Trees 9’ O.C., or 0.012 per square foot of area; (this assumes 2 -5 gal. size) —
such trees are to be at least 50% conifers;
2. Plus shrubs 6’ O.C., or 0.028 per square foot (this assumes 1 -2 gal. size);
CONSTRUCTION INSPECTION
Essential to the success of the compensatory mitigation program is the accurate
inspection of onsite activities immediately prior to and during the wetland creation and
planting phases. These activities include pre-construction site inspection, onsite
inspection and technical direction during wetland creation and planting activities, and
post-creation/planting site inspection and evaluation.
The pre-creation site inspection allows the project proponent and the project biologist to
evaluate and, if necessary, adjust the onsite construction steps. These steps include
analysis of project site elevation features, project sequencing and timing, final grade
analysis, unforeseen required minor modifications to the original establishment plan, and
the establishment of environmental protections (silt fences, etc.) required during
construction. Interaction with City of Federal Way wetland staff is also an essential
element during pre-construction site inspections and discussions. Onsite technical
inspection during construction and planting activities will be implemented by the project
biologist. The project biologist will perform oversight and address minor unforeseen
difficulties to assure that the intent of the wetland mitigation plan is met.
The project biologist shall also be responsible for ensuring that the species and sizes of
native plants selected are utilized during initial planting. If selected native species
become unavailable, the project biologist will consult with City of Federal Way wetland
staff for substitute plant species to ensure that the intent of the wetland mitigation plan is
met. Post-creation site inspection/evaluation will include the preparation of a "record-
drawings” which will be submitted to City of Federal Way wetland staff.
VEGETATION MAINTENANCE PLAN
Maintenance of the created wetland and buffer plant communities may be required to
assure the long-term health and welfare of the wetland's and buf fer's environmental
functions. The overall objective is to establish undisturbed plant communities that do not
require maintenance.
The reduced wetland buffer will require irrigation for the monitoring period. Irrigation will
be supplied June 1 thru September 1 at a rate of 1 inch per week.
Activities will include, but are not limited to, the removal of invasive non-native vegetation
and the additional irrigation of selected areas. Established maintenance activities include
the removal of any trash within the buffer.
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P&M FedWay Mitigation Plan
MITIGATION CONSTRUCTION SCHEDULE
PROJECT TASK TASK SCHEDULE
(on or before)
Onsite pre-creation meeting September, 2021
Placement of protective fencing, final marking, and
identification of work area.
September, 2021
Planting of enhancement wetland & buffer November, 2021
Record-drawings report to City December,2021
PROJECT MONITORING
Following the successful completion of the proposed compensatory mitigation plan a five-
year monitoring and evaluation program will be undertaken. The purpose of this program
is to assure the success of the selected mitigation as measured by an establishe d set of
performance criteria (see above). This monitoring will also provide valuable information
on the effectiveness of mitigation procedures.
STANDARDS OF SUCCESS
Vegetation Sampling Methodology and Monitoring Schedule
Onsite monitoring will count and clearly identify each tree and shrub installed during the
initial planting phase. Such monitoring will also include any subsequent planting required
to meet the performance criteria. These defined performance criteria will be applied at
the time of monitoring. All installed trees and shrubs will be visually evaluated to
determine the rate of survivorship, health, and vigor of each plant.
Vegetation Monitoring
1. Upon the completion of initial planting and as a part of each monitoring period the
project biologist will count the number of live plants which were planted within the
wetland and buffer areas. Plants will be identified to species and observations of
general plant condition (i.e., plant health, amount of new growth) are to be recorded
for each plant.
2. The project biologist will count the number of undesirable invasive plants and estimate
the aerial coverage (as if the observer were looking straight down from above) of these
invasive plants. Undesirable plants include blackberries, Scot’s broom, tansy ragwort,
and other such plants listed in the Washington State Noxious Weed List.
3. The project biologist will count the number of desirable "volunteer" plants and estimate
the aerial coverage of these plants within the mitigation area.
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P&M FedWay Mitigation Plan
4. The project biologist will take photographs that show the entire mitigation area. During
the five-year monitoring period photos will be taken in the same direction and at the
same location to provide a series of photos. These photos will show plant growth,
plant species, and plant coverage.
5. Upon the completion of the initial project planting and upon the completion of each
monitoring period the project biologist will prepare a report defining methods,
observations, and results along with the date the observations were completed. Each
report will be sent to the City of Federal Way Planning Dept..
6. The monitoring schedule is defined as:
A. At the completion of initial project planting. This report will include a “record
drawing” defining the species used, locations, and general site conditions. This
report will also include a “lessons learned” section to assist in future monitoring
and final project assessment. This “record drawing” and report will be provided
to the City within two weeks after the completion of onsite planting.
B. Once per year for five years following the completion of initial onsite
planting. Onsite monitoring will be completed once near the end of the
growing season (late September). For each onsite monitoring activity a report
will be prepared and provided to the City within two weeks after the completion
of onsite monitoring.
The last monitoring report will include notification to the City biologist that the monitoring
program has concluded and that City review and site inspection is required for project
analysis and release of the financial guarantee. This final report will also include a
“lessons learned” section to assist and final project assessment and to potentially assist
in the evaluation other mitigation projects.
Vegetation Monitoring Sequencing
IDENTIFIED TASK DATE OF COMPLETION
(on or before)
First growing season fall plant inspection September 30, 2022
First growing season fall report October 15, 2022
Second growing season fall plant inspection September 30, 2023
Second growing season fall report October 15, 2023
Third growing season fall plant inspection September 30, 2024
Third growing season fall report October 15, 2024
Fourth growing season fall plant inspection September 30, 2025
Fourth growing season fall report October 15, 2025
Fifth growing season fall plant inspection September 30, 2026
Fifth growing season fall report October 15, 2026
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P&M FedWay Mitigation Plan
WILDLIFE OBSERVATIONS
Observations of wildlife will coincide with the onsite activities undertaken as part of the
Vegetation Monitoring Program. The onsite team will document the extent of bird species
abundance, site utilization, nesting and feeding activities, and species diversity. In
addition, documentation of terrestrial and aquatic reptiles, amphibians, and mammals
observable without trapping will also be documented. Wildlife observations will be
documented within the Vegetation Monitoring Reports noted above.
REMOVAL OF INVASIVE NON-NATIVE VEGETATION
As a contingency, should the removal of invasive non-native vegetation become
necessary, the project proponent will contact City of Federal Way wetland staff to
establish and define specific actions to be taken. Resultant contingency plan activities
will be implemented when the ongoing vegetation monitoring program indicates that
plants listed in the Washington State Noxious Weed List and Scot's broom are becoming
dominant in the community (greater than 20%).
Following initial planting of the wetland and buffer areas the project team will undertake
an invasive vegetation control program through the five-year monitoring program. This
control program will focus on biannual hand-removal of re-sprouting invasive shrubs and
will not adversely impact the desirable plants within the wetland and buffer.
SALVAGE AND REUSE OF WOODY MATERIAL
Woody material salvaged from trees cleared for construction of the new home will be
salvaged and installed as large woody debris in the retained wetland and the wetland
mitigation planting areas. No woody material will be imported to the site.
Vegetation Control Program Schedule
TASK TO BE COMPLETED ON OR ABOUT
First growing season fall removal September 15, 2022
Second growing season fall removal September 15, 2023
Third growing season fall removal September 15, 2024
Fourth growing season spring removal September 15, 2025
Fifth growing season fall removal September 15, 2026
COVERAGE FOR EXPOSED BUFFER AREA
Coverage for all exposed surfaces within the mitigation area will be completed within two
weeks following the completion of onsite grading.
Coverage will be by hydroseeding wetland buffer mix.
CONTINGENCY PLAN
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P&M FedWay Mitigation Plan
As a contingency, should the proposed compensatory plan fail to meet the performance
criteria the project proponent will undertake required remedial actions. Where plant
survival is the failing component the project proponent will replant and ensure the success
of this second planting which would be held to the same standard of success as measured
by threshold criteria and monitoring processes. Should additional remedial actions be
required, the project proponent will meet with City of Federal Way environmental staff to
establish and define actions to be taken to meet the desired goal of this program.
PLANTING NOTES
All plant materials shall be native to the southern Puget Sound Region. The project
biologist shall inspect plant materials to ensure the appropriate plant schedule and plant
characteristics are met. The project proponent shall warrant that all plants will remain
alive and healthy for a period of one year following completion of planting activities. The
project proponent shall replace all dead and unhealthy plants with plants of the same
specifications.
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P&M FedWay Mitigation Plan
REFERENCE LIST
Adamus, P.R., E.J. Clairain Jr., R.D. Smith, and R.E. Young. 1987. Wetland Evaluation
Technique (WET); Volume II: Methodology, Operational Draft Technical Report Y -87,
U.S. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi.
Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands
and Deepwater Habitats of the United States. Office of Biological Services, U.S. Fish and
Wildlife Service, U.S. Department of the Interior, FWS/OBS-79/31.
Environmental Laboratory. 1987. "Corps of Engineers Wetlands Delineation Manual,"
Technical Report Y-87-1, US army Engineer Waterways Experiment Station, Vicksburg,
Miss.
Hitchcock, C.L., A. Cronquist. 1977. Flora of the Pacific Northwest. University of
Washington Press. Seattle, Washington.
Reppert, R.T., W. Sigleo, E. Stakhiv, L. Messman, and C. Meyers. 1979. Wetland
Values - Concepts and Methods for Wetland Evaluation. Research Report 79-R1, U.S.
Army Corps of Engineers, Institute for Water Resources, Fort Belvoir, Virginia.
U.S. Army Corps of Engineers. 2010. Regional Supplement to the Corps of Engineers
Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Version
2.0), ed. J. S. Wakeley, R. W. Lichvar, and C. V. Noble. ERDC/EL TR -10-3. Vicksburg,
MS: U.S. Army Engineer Research and Development Center.
U.S. Department of Agriculture, Soils Conservation Service. Soils Survey of King County
Area Washington, February 1979.
Washington State Department of Ecology. 1997. Washington State Wetlands
Identification and Delineation Manual. Publication Number 96-94.
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!!FCVFP 3 - 1,515 Sq. Ft.
FCVFP 25,7 50 Sq . Ft.
FCVFP 1 - 1,5 00 Sq . Ft.
8,4 72 Sq . Ft.
2,900 SqFt
3,350 SqFt
3,250 SqFt
0 60 12030Feet
Beaver Creek Environmental ServicesMHeckert@Q.com253 732 6515July 6, 2021
Att. 1HENRY SiteParcel #s 14 2103-9069, 9087, and 9043Mitigation Area MapFrom Su rve y
1 inch = 6 0 feet
´
Legend
Clearing Limits
2,900 SqFt; 3,250 SqFt; 3,350 SqFt
!Silt & Split-Rail Fence
Flow Control BMP Vegetated Flow Paths (FCVFP)
Mitigation planting Area = 8,472 sqft
Date: 7/2/2021 Prepared by:
Project Number:
Applicant:Phone: 360-281 8195
PLANT MATERIALS (includes labor cost for
plant installation)
Type Unit Price Unit Quantity Cost
PLANTS: Potted, 4" diameter, medium $5.00 Each $ -
PLANTS: Container, 1 gallon, medium soil $11.50 Each $ -
PLANTS: Container, 2 gallon, medium soil $20.00 Each 482.00 $ 9,640.00
PLANTS: Container, 5 gallon, medium soil $36.00 Each 102.00 $ 3,672.00
PLANTS: Seeding, by hand $0.50 SY $ -
PLANTS: Slips (willow, red-osier)$2.00 Each $ -
PLANTS: Stakes (willow)$2.00 Each $ -
PLANTS: Stakes (willow)$2.00 Each $ -
PLANTS: Flats/plugs $2.00 Each $ -
TOTAL $ 13,312.00
Type Unit Price Unit Cost
Compost, vegetable, delivered and spread $37.88 CY $ -
Decompacting till/hardpan, medium, to 6" depth $1.57 CY $ -
Decompacting till/hardpan, medium, to 12" depth $1.57 CY $ -
Hydroseeding $0.51 SY 325.00 $ 165.75
Labor, general (landscaping other than plant installation)$40.00 HR 25.00 $ 1,000.00
Labor, general (construction)$40.00 HR $ -
Labor: Consultant, supervising $55.00 HR $ -
Labor: Consultant, on-site re-design $95.00 HR $ -
Rental of decompacting machinery & operator $70.00 HR $ -
Sand, coarse builder's, delivered and spread $42.00 CY $ -
Staking material (set per tree)$7.00 Each $ -
Surveying, line & grade $250.00 HR $ -
Surveying, topographical $250.00 HR $ -
Watering, 1" of water, 50' soaker hose $3.62 MSF $ -
Irrigation - temporary $3,000.00 Acre 0.20 $ 600.00
Irrigation - buried $4,500.00 Acre $ -
Tilling topsoil, disk harrow, 20hp tractor, 4"-6" deep $1.02 SY $ -
TOTAL $ 1,765.75
ITEMS Unit Cost Unit Cost
Fascines (willow) $ 2.00 Each $ -
Logs, (cedar), w/ root wads, 16"-24" diam., 30' long $1,000.00 Each $ -
Logs (cedar) w/o root wads, 16"-24" diam., 30'$400.00 Each $ -
Logs, w/o root wads, 16"-24" diam., 30' long $245.00 Each $ -
Logs w/ root wads, 16"-24" diam., 30' long $460.00 Each $ -
Rocks, one-man $60.00 Each $ -
Rocks, two-man $120.00 Each $ -
Root wads $163.00 Each $ -
Spawning gravel, type A $22.00 CY $ -
Weir - log $1,500.00 Each $ -
Weir - adjustable $2,000.00 Each $ -
Woody debris, large $163.00 Each $ -
Snags - anchored $400.00 Each $ -
Snags - on site $50.00 Each $ -
Snags - imported $800.00 Each $ -
* All costs include delivery and installation TOTAL $ -
EROSION CONTROL
ITEMS Unit Cost Unit Cost
Backfill and Compaction-embankment $ 4.89 CY $ -
Crushed surfacing, 1 1/4" minus $30.00 CY $ -
Ditching $7.03 CY $ -
Excavation, bulk $4.00 CY $ -
Fence, silt $1.60 LF 440.00 $ 704.00
Jute Mesh $1.26 SY $ -
Critical Areas Mitigation
Bond Quantity Worksheet
Description
Mark Heckert
Project Description: Buffer restoration & Enhancement
Project Name: P&M DEVELOPMENT FEDERAL WAY
Location: Parcel # 1421039069, 1421039087, & 1421039043 P&M DEVELOPMENT
INSTALLATION COSTS ( LABOR, EQUIPMENT, & OVERHEAD)
HABITAT STRUCTURES*
Mulch, by hand, straw, 2" deep $1.27 SY $ -
Mulch, by hand, wood chips, 2" deep $3.25 SY 55.00 $ 178.75
Mulch, by machine, straw, 1" deep $0.32 SY $ -
Piping, temporary, CPP, 6"$9.30 LF $ -
Piping, temporary, CPP, 8"$14.00 LF $ -
Piping, temporary, CPP, 12"$18.00 LF $ -
Plastic covering, 6mm thick, sandbagged $2.00 SY $ -
Rip Rap, machine placed, slopes $33.98 CY $ -
Rock Constr. Entrance 100'x15'x1'$3,000.00 Each $ -
Rock Constr. Entrance 50'x15'x1'$1,500.00 Each $ -
Sediment pond riser assembly $1,695.11 Each $ -
Sediment trap, 5' high berm $15.57 LF $ -
Sediment trap, 5' high berm w/spillway incl. riprap $59.60 LF $ -
Sodding, 1" deep, level ground $5.24 SY $ -
Sodding, 1" deep, sloped ground $6.48 SY $ -
Straw bales, place and remove $600.00 TON $ -
Hauling and disposal $20.00 CY $ -
Topsoil, delivered and spread $35.73 CY $ -
TOTAL $ 882.75
GENERAL ITEMS
ITEMS Unit Cost Unit Cost
Fencing, chain link, 6' high $18.89 LF $ -
Fencing, chain link, corner posts $111.17 Each $ -
Fencing, chain link, gate $277.63 Each $ -
Fencing, split rail, 3' high (2-rail)$10.54 LF 440.00 $ 4,637.60
Fencing, temporary (NGPE)$1.20 LF $ -
Signs, sensitive area boundary (inc. backing, post, install)$28.50 Each 12.00 $ 342.00
TOTAL $ 4,979.60
$ 20,940.10
ITEMS
Percentage
of
Construction
Cost Unit Cost
Mobilization 10%1 $ 2,094.01
Contingency 30%1 $ 6,282.03
TOTAL $ 8,376.04
MAINTENANCE AND MONITORING
Maintenance, annual (by owner or consultant)
Less than 1,000 sq.ft. and buffer mitigation only $ 1.08 SF $ -
Less than 1,000 sq.ft. with wetland or aquatic area
mitigation $ 1.35 SF $ -
Larger than 1,000 sq. ft. but less than 5,000 sq.ft. of buffer
mitigation $ 180.00 EACH $ -
Larger than 1,000 sq. ft. but less than 5,000 sq.ft. of
wetland or aquatic area mitigation $ 270.00 EACH $ -
Larger than 5,000 sq.ft. but < 1 acre -buffer mitigation only $ 360.00 EACH 5.00 $ 1,800.00
Larger than 5,000 sq.ft. but < 1 acre with wetland or aquatic
area mitigation $ 450.00 EACH $ -
Larger than 1 acre but < 5 acres - buffer and / or wetland or
aquatic area mitigation $ 1,600.00 DAY $ -
Larger than 5 acres - buffer and / or wetland or aquatic area
mitigation $ 2,000.00 DAY $ -
Monitoring, annual (by owner or consultant)
Larger than 1,000 sq.ft. but less than 5,000 wetland or
buffer mitigation $ 720.00 EACH $ -
Larger than 5,000 sq.ft. but < 1 acre with wetland or aquatic
area impacts $ 900.00 EACH 5.00 $ 4,500.00
Larger than 1 acre but < 5 acres - buffer and / or wetland or
aquatic area impacts $ 1,440.00 DAY $ -
Larger than5 acres - buffer and / or wetland or aquatic area
impacts $ 2,160.00 DAY $ -
TOTAL $ 6,300.00
Total $35,616.14
(16 hrs @ $90/hr)
(24 hrs @ $90/hr)
(10 hrs @ $45/hr)
(WEC crew)
(1.25 X WEC crew)
(8 hrs @ 90/hr)
(10 hrs @ $90/hr)
(4hr @$45/hr)
(8 hrs @ 45/hr)
(3 X SF total for 3 annual events;
Includes monitoring)
(3 X SF total for 3 annual events;
Includes monitoring)
(6hr @$45/hr)
NOTE: Projects with multiple permit requirements may be required to have
longer monitoring and maintenance terms. This will be evaluated on a case-by-
case basis for development applications. Monitoring and maintance ranges may
be assessed anywhere from 5 to 10 years.
(Construction Cost Subtotal) OTHER