HomeMy WebLinkAboutWetland Buffer Restoration 977700041
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WETLAND BUFFER RESTORATION PLAN
FORA
1 ACRE PARCEL
AT
314 MERRY ROAD
NORDLAND WASHINGTON
(Tax Parcel No. 977 700 041)
lRE(~EIVEn
JAN 0 0 '1f'H'l7
I U Lull
Prepared For:
Wilber Judycki
5311 West Arlington Street
Yakima, W A 98908
,JHff>>~U1v&UUNI~ utU
Prepared by:
:,L
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.~t4
Wiltermood Associates, Inc.
1015 SW Harper Road
Port Orchard, W A 98367
(360) 876-2403
December 26, 2006
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INDEX
INTRODUCTION
PAGE
1
WETLAND AND BUFFER CONDITIONS
1
RESTORATION PLAN OVERVIEW
Objectives of the Restoraion Plan
Goals of the Restoration Plan
Planting Plan Specifications
2
2
2
2
PERFORMANCE STANDARDS
4
MONITORING PLAN
4
MAINTENANCE PLAN
5
CONTINGENCY PLAN
6
PERFORMANCE BONDS
6
ATTACHMENTS
Wetland Delineation and Buffer Clearing Map
Buffer Restoration Plan Drawing
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INTRODUCTION
This wetland buffer restoration plan has been prepared for a 1 acre site located at 314
Merry Road in Nordland, Jefferson County Washington (Tax Parcel No. 977700041).
The restoration is being completed because a portion of a Category II wetland buffer was
cleared of vegetation. The site was visited on December 15, 2006 and the wetland edge
was identified and delineated to determine the amount of buffer that had been cleared. It
was determined that an area of approximately 2,351 square feet was cleared on the outer
edge of the wetland buffer. See attached drawing of site. The area that was cleared
appears to have been dominated Scoulers willow and possibly grand fir and Douglas fir
with a sparse shrub layer of ocean spray and salmonberry and a thick herbaceous layer of
sword fern. Jefferson County has requested that a buffer restoration plan be prepared in
order to regenerate the wetland buffer so that the area may continue to provide water
quality, run off infiltration and a sound and sight barrier to the wetland.
This restoration plan proposed to restore approximately 2,351 square feet of wetland buffer
that has been cleared of native vegetation. Monitoring will be required for a period of
three years to ensure that the plants survive and grow to create a diverse tree, shrub and
herbaceous buffer community that protects the wetland from possible future development.
Maintenance will be necessary to ensure survival and good growing conditions and will
entail removal of non-natives/invasives and watering on a regular basis during the summer
months. Three performance standards will be used to gauge the success of the restoration
plan and they will include at least 90% survival of all the installed plants, less than 15%
cover by non-natives/invasives during each year of the three year monitoring period and at
least 60 % cover by the installed plants by the end of the three year monitoring period.
WETLAND AND BUFFER CONDITIONS
The parcel is currently undeveloped and is composed of a depressional Palustrine
Forested/Scrub Shrub Category II wetland that lies across south end with an intact
moderate aged coniferous dominated forested buffer (excluding the area that was cleared)
running through the center of the property. The north end of the property was cleared in
preparation for a possible home site, which never materialized. The lot is surrounded to
the north by Merry Road, to the east and west by similar sized lots containing single family
residences and to the south by off site portions of the Category II wetland. It appears that
most of the on site portion of the wetland is forested with a tree layer dominated by red
alder and western red cedar. The shrub layer in the forest is dominated by salmonberry
with lower percentages of western crabapple and Sitka willow. The herbaceous layer is
dominated by slough sedge with lower percentages of water parsley and lady fern. The
wetland appears to receive most of its hydrology via upland runoff collection and it is a
depressional basin that is collecting this runoff.
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The vegetated wetland buffer on the site is composed of a tree layer dominated by
Scouler's willow, grand fir, western hemlock, western red cedar, Douglas fir and red
alder. The shrub layer is dominated by salmonberry and ocean spray. The herbaceous
layer in the forested buffer area is dominated by sword fern with lower percentages of
trailing blackberry. The cleared buffer area has overhanging vegetation of the above
mentioned composition with the shrub and herbaceous layers cleared. It appears that the
area was seeded with a grass mix and creeping buttercup has gotten a foothold in the
cleared and mowed areas.
RESTORATION PLAN OVERVIEW
The wetland and buffer restoration plan proposes to install native shrubs and herbaceous
vegetation in clumps with trees intermixed to emulate natural vegetative conditions. The
restored area will be located in the area that has been cleared within the 100 foot required
natural vegetation buffer for the Category II wetland that encompasses the south end of the
lot. The cleared area is within the eastern outer 50 % of the buffer and is irregular in
shape, totaling approximately 2,351 square feet. Maintenance is proposed to keep the
cover of non-native invasive species in the restored areas as low as possible in order to
ensure the plants grow without hindrance. Watering during the summer months will also
help the installed native plants to become established during the monitoring and
maintenance period.
Objectives of the Restoration Plan
The objective of this restoration plan is to replace the vegetation removed during recent
clearing activities with native buffer vegetation that will provide improved buffer
conditions and an attractive amenity to the site. The vegetation will resemble a forested
community with shrub and herbaceous vegetation in the understory once it has matured.
Goals of the Restoration Plan
The goals for plant installation will be 90% survival rate among the native plants, at least
60% cover by native vegetation in the buffers and less than 15 % cover by non-native
plants including Himalayan blackberry, Scot's broom and English ivy. The survival rate
and non-native plant cover standards are expected to be met every year of the three year
monitoring period while the 60 % cover standard will be met by the end of the required
three year monitoring period.
Planting Plan and Specifications
The plants chosen for this restoration plan are native to Marrowstone Island and are known
to inhabit the site already. The plants as listed below and shown on the restoration
drawing (attached) shall be obtained from regional native plant nurseries and will be
installed in clumps to emulate natural wetland and buffer conditions. The clumps will
consist of 6-12 individual plants to be spaced 5-7 feet apart. Plant installation should take
place during the dormant season between October 15th and March 151\ to ensure the plants
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get a good start in the spring when water and temperature levels are optimal for growth.
Plant installation can also take place during the spring and summer provided the plants are
regularly watered after installation. Deciduous plants shall be at least 24 inches tall and in
1 gallon pots. Conifers shall be at least 24 inches tall and 1 gallon potted or bareroot
individuals. In general, the plants will be laid out randomly by hand in their respective
clumps and not measured out by string line. The plants will be installed by digging a two
to three foot diameter hole and placing the plug from the pot into the ground once the soil
around the pl~g is loosened. The hole will then be backfilled with the dug out soil and
loosely packed down around the plug. Substitutions may be necessary for species or
individuals that cannot be found at local nurseries and all plant substitutions shall be
approved by the project biologist prior to installation. See Detailed Buffer Restoration
Plan for location of plants in the buffer.
Plant Common Name Botanical Name Plant size
#
20 Sword fern Polystichum munitum 1 gal
10 Red Osier Dogwood Cornus sericea 1 gal
10 Western Red Cedar Thuja plicata 1 gal
12 Grand Fir Abies grandis Min 24"
10 Douglas Fir Pseudotsuga menziesii Min 24"
The project biologist will be on site prior to and during the plant installation phase to verify
that the species, quantity, and sizes of the plants are of the correct species or the approved
substitutions have been made and that the plants are healthy and free of disease. The
biologist will be able to help place the plants so that they are in the appropriate locations.
Each of the plants will be flagged for easy identification and to indicate their presence
during future maintenance activities. While conducting the on-site inspection of plants, the
biologist shall identify and flag any existing native shrubs or trees in the restored wetland
buffer area that will be saved and considered part of the mitigation plan. Also the biologist
will identify areas in which non-native plants will be removed by the root as part of the
maintenance of the buffer planting plan. An as/built will be prepared by the biologist after
the planting has been implemented that documents the date of the planting, how it was
implemented, and where the photo stations will be located. Baseline photos will be
provided in the as/built.
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PERFORMANCE STANDARDS
The performance standards have been developed to monitor the success of the installed
plants with respect to the survival of individuals and percent cover provided by the
installed plants by the end of the five year monitoring period. The following performance
standards have been developed for the Judycki Restoration Plan:
Years One through Three:
· 90 % survival of planted species within restored buffer areas.
· Less than 15 % cover by non-native exotics, including but not limited to English ivy,
Himalayan blackberry, and Scot's broom
By End of Year Three:
· At least 60 % cover by native installed or volunteer plants within the restored area.
MONITORING PLAN
The monitoring plan has been prepared so that it can be conducted by the current owner or
by a biologist. Monitoring will occur for a period of three years following installation of
the plants to track the success of the project and to ensure that the performance standards
are met. Monitoring should take place at the end of each summer (August or September,
which is considered the end of the growing season) so that the plants have had a chance to
grow fully. Survival rate and percent cover of installed plants will be monitored in the
respective restoration area because they are relatively small in area and the restoration does
not entail installation of significant numbers of plants.
Performance Standard Ht-Survival Rate-Survival rate will be determined by
counting the number of live plants and dividing by the number of plants originally
installed (per design and as built), which will give a percent survival rate.
Performance Standard H2-Percent Cover-The percent cover standard will be
monitored as if looking over the restored area from above and estimating the areas
covered by the individual species. To determine the percent cover easily, the
restoration area can be divided into quarters and the amount of area covered by each
native plant species (installed or volunteer plant) estimated within each quarter. The
cover within each quarter can then be added together and divided by 4 to determine
the average cover within the restored area. The percent cover within an area can
total greater than 100 % because of the overlap in plant cover provided by the tree,
high/low shrub and herbaceous layers. The percent cover can also just be roughly
determined for the entire area without dividing it.
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Year 1:
Year 2:
Year 3
20-30% cover by installed and volunteer native plants
30-40% cover by installed and volunteer native plants
50-60% cover by installed and volunteer native plants
Performance Standard #3-Cover by Non-Natives-The cover by non-native plants,
which on this site will include English ivy, Scot's broom, and blackberry, should be
kept below 15 %, which is why regular maintenance is required. The cover by these
species will be determined through the same process as determining the cover of
installed plants. If the percent cover by non-native is too high, more intensive
maintenance must be conducted.
The monitoring phase of the project will begin upon submittal and acceptance of the as
built report, which will show the location of the plants installed using photos and hand
drawn maps, upon completion of plant installation, The as built drawing will then be used
in the three year follow up monitoring to track the changes in vegetative cover and
document the survival rate of the plants installed as part of the restoration plan. The entire
restoration area will be monitored and no individual sample plots will be established.
Photos will be taken of the restoration area to provide visual documentation of the changes
that occur over the three year monitoring period. The as built report will be submitted to
Jefferson County Department of Community Development within a month of
implementation.
Monitoring at the end of the growing season will document the maximum growth and
survival of the individual species. Photos will be taken of the restoration area from several
different points during each monitoring visit to visually document the overall appearance of
the restored buffer. These photos should be taken from roughly the same locations each
year to show the same areas of restoration over the entire monitoring period for
comparison purposes. The photos and data collected in the restoration areas will be.
compiled into a short report and submitted to Jefferson County DCD to verify the
restoration plan is developing as designed and is meeting the performance standards. The
report will address whether the restored buffer performance standards are going to be met
by the end of the three years and whether or not contingency measures will be needed.
MAINTENANCE PLAN
The restored buffer shall be maintained throughout the growing season of each monitoring
year to increase the survival of the plants, particularly with respect to providing water
during the summer months and clearing of invasive species. Hand clearing should be done
around the individual plants because it will reduce the impact to the planted stock. Hand
clearing and mowing will be necessary at least two times during each growing season to
ensure the weeds and grasses do not hinder the growth and development of the scrub/shrub
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buffer community. The presence of any other native shrub or tree species (salmonberry,
willows, lady fern, sword fern, etc.) not specifically planted in the wetland and upland
shall be considered part of the restoration planting plan and will not be removed, unless
they begin to compete and cause widespread die-off of the installed plants.
Watering of the planted vegetation may be necessary during the drier portions of the year
to ensure plant success and can be done by hand or sprinklers. Fertilization of the installed
plants, using slow release tablets or spikes, may be necessary to initiate growth and
provide nutrients that are not necessary present in the soil. Broadcast fertilizers shall not
be used because they could impact water quality.
CONTINGENCY PLAN
Although the success of the restoration plan is not ensured, it is likely to succeed because
of the size and scope of the project and that the area has non-compacted soils and has a tree
canopy providing shade. If for some reason the survival rate is less than 90 %, plants that
did not survive will be replaced with the same or a similar native species with the approval
of the project biologist. Replacement will occur in the dormant season immediately
following the growing season in which less than 90% survival was recorded. If at the end
of the third monitoring year, the vegetation does not cover at least 60 % of the restored
areas, additional plants may need to be installed. Maintenance activities will be continued
for those replaced plants to ensure their survival. Monitoring may be extended by another
year if the contingency plan is required.
PERFORMANCE BONDS
A performance bond (surety device) may be required by Jefferson County to ensure
fulfillment of the compensation project, monitoring program and any contingency
measures. The bond amounts below are determined by estimating the cost of the plants
and labor to install them, the cost to complete the as built letter to let the city know that the
restoration plan has been implemented, and the monitoring/maintenance costs. There are
two performance bonds. The first covers implementation of the restoration plan and will
be released following submittal and acceptance of the as built by the County. The second
covers maintenance and monitoring and will be released upon acceptance of the final
monitoring report by the County. The totals for each performance bond are based on the
figures for the services listed below and multiplied by 125 percent, as required by
Jefferson County.
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Performance Bond-Implementation
62 containerized plants- labor included
(based on native plant nursery price list as per planting specs)
Cost for supervision of project biologist
Supervision of plant installation
As-Built design and letter
TOTAL FOR IMPLEMENT A TION PHASE
TOTAL X 1250/0 FOR IMPLEMENTATION BOND
Performance Bond-Monitoring
Year One Monitoring
Year Two Monitoring
Year Three Monitoring
Maintenance Bond (Twice per year)
Year One Maintenance
Year Two Maintenance
Year Three Maintenance
TOTAL FOR MONITORING AND MAINTENANCE PHASE
$496.00
$180.00
$450.00
$1,126.00
$1,407.50
$630.00
$630.00
$630.00
$600.00
$600.00
$600.00
$3,690.00
TOTAL x 125% FOR MONITORING AND MAINTENANCE BOND $4,612.00
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