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Home My WebLink AboutSpecial Report (105) pL....UU:;J -UUllD..'J Olympic Wetland Resources" Inc~ Dixie Llewellin, Principal Biologist Introduction A Level I Wetland Assessment was conducted on March 8, 2005 on the 5-acre parcel located adjacent to Rice Lake. The project has received a stop work order by Molly Pearson (Code Compliance Coordinator DCD) due to the potential alterations of wetland buffers associated with Rice Lake. In addition the project does not have a storm water permit which is required when over 300 cubic yards of material are moved. Wetlands are indicated on the on the Jefferson County wetland maps surrounding Rice Lake. The Jefferson County Stream Map indicates a Type 3 stream flowing out of the south western portion of the lake eventually flowing into a Type 2 stream that empties into Quilcene Bay less than 2 miles away. 'Wetland analysis was conducted using the methodology outlined in the Washington State Department of Ecology Wetland Identification and Delineation Manual (1997). All wetlands within Jefferson County are subject to requirements outlined in the Jefferson County Unified Development Code (UDC) dated January 1,2001. Land use restrictions will apply to all future developments associated with this parcel. Description of Site . Legal Description: Parcel #702 122029 Section 12 Tovmship 27N Range 2W . Location: Rice Lake Road Extension off of Highway 101, 2 miles north of Quilcene, Washingtol1, Jefferson County . Soils: Se Semiahmoo muck, and Que Quilcene silt loam . Slopes: 30 to 50% slopes '\ , , MATI 2 1 Level I Assessment Fuller Report File Number 2005-4868 Olympic Wetland Resources. lnc 3/05 Findings Portions of the property have been cleared of timber (maples, firs and alders) aging from 40 to 85 years old to create the new access driveway and enlarge a flat site (~30' X 30') for a camping trailer and a small storage building. The driveway slopes steeply dovm to the flatted area from a private road (Rice Lake Rd. Extension). To create and stabilize the driveway and building platfoffil the slope was excavated, reshaped with landfill, and stabilized with large boulders. A drainage ditch, filled with rocks and a corrugated pipe, divert upslope water away from the driveway and platform. As a restoration effort two dozen Douglas' firs have been planted in the impacted areas and along the driveway. Wetlands and buffers surrounding Rice Lake appear to have had little impact from development, as observed by both the site visit and the 2000 aerial photographs. From the aerial photograph there is a tract (Parcel # 702 121 002) to the east of Rice Lake that has been recently logged; however the buffers around Rice Lake were not impacted. The high quality and undisturbed wetland and buffer surrounding the Rice Lake is prime habitat for birds and mammals. Due to the size of the wetland it was not feasible without a more comprehensive study to determine the Category of wetland. The wetland, however, will either qualifY as a Category I wetland (if there is a forested class over 1 acre and over 80 years old) or a high quality Category II wetland. The buffer will be either 150 feet or 100 feet respectively (if delineated). A delineation for this project is not appropriate since the impacts are apparent and the wetland edge clearly defined by a drop in topography and plant community change. There are no further development plans for this parcel at this time. Impacts from the clearing and grading fall within a portion of the wetland buffer. As measured during the field visit, the disturbed area is upslope (17 degree slope) and 80' from the wetland edge. The fill moved to level the site for the storage building is 90' from the wetland edge. Recommendations Recommendations include applying for a stormwater permit. All stormwater should be diverted away from wetland buffers and into bioswales to prevent sediment or contaminants from entering the wetland or lake. It is recommended that the impacted areas along the driveway and around the filled platform be revegetated with appropriate native trees and shrubs. Species identified on site include alders, big leaf maple, cedars. salmonberry, Indian plwn, Douglas fir and huckleberry. All existing native vegetation should remain within the wmltered buffer. In addition to the two-dozen Douglas firs previously planted the addition of a shrub layer is recommended. This will add structural layers and increase species diversity within the plant community. A Revegetation Plant List is included as a guide for restoration. This list includes red- flowering currents, vine maple, red-osier dogwood, hazelnut and cedars. Plantings can be rearranged to suit landscape and aesthetic requirements. In general shmbs should be spaced 4 to 5 feet apart and \, lw,Fl 2.\ 28(;;J .... Olympic Wetland Resources, lnc 3105 Level i Assessment Fuller Reporl File Number 2005-4868 trecs 10 feet apart. Also included with this rcport are recommendations for revegetation procedures to assure success of newly planted species. Impacted areas should be monitoring closely for non-native invasive species, which include reed canarygrass, Scot's broom, or thistle. These species should be removed immediately, so they do not spread to other parts of the wetland or wetland buffer. Jefferson County Department of Community Development (DCD) must approve all future development projects or alterations associated with this parcel. Final authority over this wetland assessment and final requirements rests with Jefferson County Planning Department (DCD). If this project requires a more specific planting plan or if you have fmiher planning needs please don't hesitate to call Sincerely, Dixie Llewellin Principal Biologist, Olympic \Vetland Resources, Inc. Certified for Wetland Delineation, 1987 Manual. Wetland Training Institute, June 1995. \ 'I i t. 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E >. o e g .... (l} 0.. ;9 Vi N ~ l:: o .i -0 ::: <l> ~ E o (.) e e.o c ";:; f;j c: '- ~ :;, LL c:- .... ro -l -\ r; y~ Revegetation Recommendations Fall Installation Planting should be installed between mid-September and mid-November, unless the new plantings can be watered throughout the summer. Plantings installed in the fall generally outperform those installed in the late winter or spring. Plants put in the ground in the fall have the advantage of an extended period for root growth before rapid top growth in the spring. In the fall, the soil is warmer and more aerated than in the spring and most plants experience active root growih during this time. The cool, cloudy days and frequent precipitation of fall and winter also provide ideal transplanting conditions. Until sufficient root systems develop, newly installed plants will undergo transplanting stress that can be exacerbated by hot sunny days. Fall and winter weather allows for reduced transpiration and provides ample moisture for the roots while the plant recovers from transplant shock. Root Disturbance Immediately before installation plants with broken, damaged, or twisted roots must be pruned. Matted or circling roots of containerized plantings must be pruned or straightened and the sides of the root ball must be roughened from top to bottom to a depth of approximately half an inch in two to four places. If circling roots are left, they may eventually girdle the plant as they grow and thicken in place. If the roots at the edge of the root ball are straightened and extended, they will have access to a greater volume of soil in the planting hole. Also, the roughened edges of the root ball will have better contact with the backfill soil. Disturbing and removing one-fourth to one-half of the roots in the outer inch of the root ball will damage only the most sensitive plants; most often, this treatment actually stimulates increased plant growth. Plant Depth The finished height of each plant's root ball will be slightly higher than that of the surrounding soil. The exception is for sandy soils, in which case the soil heights will be even. The top ofthe root ball will not be covered with backfill soil. A watering basin win be fomled around each planting by building a beml of soil at least 30 inches in diameter. When planting a container-gro\\'11 plant, the top of the root ball should not be covered with any other soil. Covering the root ball with soil, particularly if it has a finer texture than the potting or field-grmving soil, will generally cause water to flow around the root ball instead of into it; root balls covered in this way may receive water only from below. To allow direct wetting of the root ball from above, install the plant so that the top of the nursery soil is slightly higher than the surrounding soil level. If the soil is sandy, or of a large particle size, then the nursery soil should be level with the surrounding soil. A watering basin made of mounded soil around each planting will further help to catch water from above-the berm should be at least 30 inches in diameter surrounding a plant. Mulch placed within the basin and on the berm will limit moisture loss from the root ball and surrounding soil, but take care that it does not come into contact with the stem of the plant as rodents or pathogens living in the mulch may attack the bark. Staking Staked plants will be attached to two stakes using strapping or webbing tied loosely enough to still allows some movement at that point. The strapping or webbing must be tied as low as possible on the plant's stem while still providing support. Staked plantings will be monitored every six months and the stakes will be removed as soon as their support becomes unnecessary. If the plant can stand-alone without staking in a moderate wind, do not use a stake. If the plant does need support, use strapping or webbing as low as possible on the trunk to loosely brace the tree with two stakes. Do not brace the tree tightly or too high on the trunk-if the tree is not able to sway, it will further lose the ability to support itself and its growth will be tall and thin. Do not use wire in a rubber hose for strapping as it exerts too much pressure on the bark. As soon as supporting the plant becomes unnecessary, remove all the stakes. Maintenance: Weeding and Irrigation The use of appropriate native species and careful planting ensures that the need for ongoing maintenance will be minimized. However, some maintenance is required to ensure that the young plants become established. It is recommended that weeding around new plants be conducted once or twice a year during the months of May and September for the first five years, and as often as needed after that. All Scot's broom, Himalayan blackberry, and thistle should be monitored and eliminated from the site. Irrigation may be required for upland species (vine maple, red-flowering currant, and pine) for the first three years or until plants are well established. Hand watering or irrigating with overhead sprinklers once a week shouid be adequate during the hot summer months. Wetland species that are planted near the creek corridor may require less watering. 2.1