HomeMy WebLinkAboutHABITAT MANAGEMENT PLAN - OT General - 3/1/2024 Habitat Management Plan
DRAFT
Parcels: 42216-50-00055
590 N Dow Creek Dr
Hoodsport, WA 98548
Mason County, WA
Report prepared for:
Nathan Lord
1221 NW 126th St
Seattle, WA 98177
09/a
.N.) 0:11
Prepared by: fit)'
Rob Nagel
PO Box 2466
Shelton, WA 98584
rob@arctos-environmental.com
(360) 229-3118
Arc.to5 Environmentcl LLC
Project: 2024-H M P-007
March 2024
Project: 2024-HMP-007 March 2024 Rrctos Environmental LLG
Table of Contents
Overview 1
Property Description 2
Analysis of Potential Impacts 3
Mitigation Measures 4
Monitoring 8
Summary 8
References 9
Appendix: Site Photos 10
List of Figures
Figure 1: Vicinity Map 2
Figure 2: Site Map 7
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Project: 2024-HMP-007 March 2024 Prctos Environmental LLG
Habitat Management Plan
42216-50-00055
590 N Dow Creek Dr
Hoodsport, WA 98548
Overview
This report details a Habitat Management Plan (HMP) for the above referenced
property in Mason County, Washington. The purpose of this report is to address
potential adverse impacts from the construction of a proposed Single-Family
Residence (SFR) within the regulated buffer of a Type-F stream. The total
development footprint proposed is a modest ±392ft2. Mitigation sequencing has
been followed to avoid, minimize, and mitigate impacts to the stream buffer area,
and this report proposes mitigation measures to offset the potential impacts of
the proposed development on the ecological functions and fish and wildlife
habitat of the stream buffer. Measures include best-management practices for
construction and enhancing a mitigation area of ±6,500ft2 with native trees and
shrubs within the stream buffer. The objectives of this report are as follows:
• Identify potential impacts of constructing the proposed development on
the stream buffer's ecological functions and fish and wildlife habitat.
• Determine mitigation measures that would offset those impacts and result
in no-net-loss to ecological functions and fish and wildlife habitat.
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Project: 2024-HMP-007 March 2024 Arc+os Environmental LLG
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Figure 1:Vicinity Map of project
Property Description & Project Background
The subject parcel is 0.28-acre in size and located in section 9, Township 22 North,
Range 4 West. The lot is relatively level and mostly forested except for an existing
driveway. A fish-bearing (Type-F) tributary to Dow Creek flows just east of the
parcel's east lot line. The 150ft regulated Type-F stream buffer virtually
encompasses the entire subject lot.
The existing stream buffer habitat within the subject lot consists of a couple
mature conifer trees, but mostly an understory layer of young red alder, big-leaf
maple, sword fern, and bracken fern.
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Project: 2024-HMP-007 March 2024 Arc+os Environmental LLC
Monitoring
A baseline monitoring report will be submitted to the Mason County Planning
Department when all construction is complete and mitigation measures have
been implemented. This initial report will establish photo points and document
the location and general size of installed vegetation. An annual monitoring report
will also be submitted to the county for 3 years to document the success of the
mitigation area. If the survival rate of installed vegetation falls below 80% in the
first five years, the area will be re-planted to meet the original target densities.
The 80% threshold will be assessed annually at each monitoring visit and
replanted the following planting season if required. The reports will also include
photos from the photo points established in the baseline monitoring report and
document any occurrence of noxious weeds in the vicinity of the project site or
mitigation area. Any noxious weeds observed will be removed.
Summary
This report details a Habitat Management Plan (HMP) for the above referenced
Properties in Mason County, Washington. Potential adverse effects of the
proposed development have been identified, and mitigation measures have been
designed to offset those impacts on the ecological functions and fish and wildlife
habitat of the stream buffer. Mitigation measures include best-management
practices for construction and planting a ±6,500ft2 mitigation area with native
trees and shrubs in an area currently lacking mid-story habitat. Proper
implementation of this plan will result in no-net-loss of ecological function to the
stream buffer from the development proposed by the applicant.
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Project: 2024-HMP-007 March 2024 Arcto5 Environmental LLG
References
Guard,J. 1995.Wetland Plants of Oregon &Washington. Lone Pine Publishing. 240 pp. Edmonton,
Alberta, Canada.
Pojar, J. and A. MacKinnon. (1994). Plants of the Pacific Northwest Coast(Revised Edition 2014). Lone
Pine Publishing. 528 pp. Vancouver, British Columbia, Canada.
WDFW. 2002. Integrated streambank protection guidelines. Washington Department of Fish and
Wildlife,Washington Department of Transportation, and Washington Department of Ecology.
Posted on Washington Department of Fish and Wildlife web site:
https://wdfw.wa.gov/sites/default/files/publications/00046/wdfw00046.pdf
WDFW. 2001. Over-Water Structures: Freshwater Issues. Washington Department of Fish and Wildlife,
Washington Department of Transportation, and Washington Department of Ecology. Posted on
Washington Department of Fish and Wildlife web site:
https://wdfw.wa.gov/sites/default/files/publications/00052/wdfw00052.pdf
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Project: 2024-HMP-007 March 2024 Arctos Environmental LLC.
Appendix: Site Photos
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Project:2024-HMP-007 March 2024 Arctos Environmental LLG
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Site Photo 2:Image showing the general lack of o shrub and sub-canopy habitat layers on the subject lot.
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Site Photo 3:Image sncwing the cleared area Pi the subject lot where the SFR is proposed.
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Project: 2024-HMP-007 March 2024 Arotos Environmental LLG
Native Plantings
Native plantings will be installed within the mitigation area parallel to the edge of
the stream to achieve the following minimum densities:
Trees— 10' on center
Shrubs —±5' on center
The plan calls for installing single trees on 10ft centers, and single shrubs on ±5ft
centers. The areas between the trees and shrubs will be filled with ferns or
groundcovers on ±4ft centers. Exact placement of installed materials will be up to
the landscape installer, following the basic spacing pattern described above. Trees
may be installed within 10ft of existing mature trees on site. Installed plants must
be flagged to aid in monitoring visits. Native plants suitable for the mitigation area
include, but are not limited to the following:
Trees:
Western red cedar (Thuja plicata)
Western hemlock (Tsuga heterophylla)
Shrubs:
Vine maple (Acer circinatum)
Evergreen huckleberry (Vaccinium ovatum)
Oceanspray (Holodiscus discolor)
Beaked hazelnut (Corylus cornuta)
All planting should occur during winter dormancy. The optimum time for planting
is from November to March.
Installation
Installation of the prescribed vegetation will be performed by experienced
landscapers familiar with planting native vegetation in natural settings.
Installation will be performed during the first winter planting season after
approval of this plan. Installed plants will be flagged to aid in monitoring
requirements.
Fertilizing
Due to the proximity of the mitigation area to the stream, no fertilizer will be
used during plant installation or maintenance.
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Project: 2024-HMP-007 March 2024 Arctos Environmental LLG
Maintenance
Maintenance of the installations will be the responsibility of the property owner.
Maintenance is to include any weeding or watering necessary to ensure plant
survival for at least five years after the date of installation.
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