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Home My WebLink AboutWetland Mitigation Plan - PLN General - 10/30/2008 Wetland Mitigation Plan for the Bear Creek Dewatto Road Improvement Project Milepost 7.3 to 10.0 CRP 1563 Mason County, Washington October 2008 Prepared by: Mason County Department of Public Works PO Box 1850 Shelton, WA 98584 360-427-9670 ext. 748 G X� Bear Creek Dewatto Road Improvement I Executive Summary This report describes the mitigation proposed by Mason County for its Bear Creek Dewatto road improvement project. The project will impact four wetlands adjacent to the existing road. The mitigation proposed would compensate for these impacts by connecting a previously intact wetland, which was divided by the construction of the existing road. The project will require fill in 9,962 square feet of wetlands. The mitigation plan includes the creation and reestablishment of 21,631 square feet of wetland, 13,677 square feet of buffer enhancement and 47,990 square feet of buffer preservation. II Project Description The project is proposed by Mason County Public Works. It is located in northeastern Mason County and impacts approximately 2.7 miles of county road. The project includes road and shoulder widening, horizontal and vertical curve realignment, guardrail installation and surfacing on the existing road. There will be 6,100 feet of major horizontal realignment as well as decommissioning 5,000 feet of existing road. 5,260 feet of existing road will be widened on its current alignment. Finally, 700 feet of new construction will be needed to connect the realigned road to a current intersection with the Bear Creek Dewatto Road. The project is necessary in order to bring the road up to current safety standards. The first phase of the project is planned for summer 2009. The project will be completed in 2010. The project corridor is shown in Figure 1. t LAW i a t F` Figure 1 Mason County Public Works October 8, 2008 Bear Creek Dewatto Road Improvement III Ecological Assessment of Project Area Location - The 2.7-mile County road project is approximately four miles north of Belfair in Mason County Washington. The project is in the west 1/2 of Section 5, east 1/2 of Section 8, NW 1/4 of Section 9, T23N, R1W WM (Figure 1). Site Description - The action area of the project is in the lowlands at the base of Kitsap Peninsula within WRIA 15. The topography of the watershed is rolling and lies in the rain shadow of the Olympic Mountains. Winters tend to be wet and summers quite dry. Generally, 80% of the annual precipitation, approximately 60 inches, falls between the months of October and March. Geoloav - The geologic makeup of the site (the type and permeability of its underlying rock materials) has a great influence on the variations in the stream discharges. The geology of the Kitsap Peninsula consists of Quaternary Pleistocene unconsolidated sediments deposited by at least six distinct glacial deposits, the most recent of which was the Vashon Glaciation (2002 Golder Assoc. and others). The outwash deposits form the primary aquifers from which groundwater is drawn. These aquifers are laterally discontinuous. Between glaciations marshy environments were created. The lowland basins are underlain by highly permeable sands and gravels. The two plus miles of the project slopes very gradually down to the southeast quarter of the project site, with elevation ranging from approximately 502 feet in the north to approximately 400 feet just southeast of the Tiger-Mission Road. Hydrology.--Water enters the area from precipitation, subsurface flows, and surface flows from the adjacent properties to the north and east. Three seasonal streams enter the project area from the north and flow south. Vegetation.--The dominant upland vegetation is second growth Douglas fir, western red cedar, red alder, big leaf and vine maple, and willow species, with an understory of salal, red and evergreen huckleberry, Himalayan, evergreen and trailing blackberry, weeds, and grasses. In general, the wetland areas have a well-developed shrub cover of spiraea, Pacific ninebark, willows and cascara, with a herbaceous understory of slough sedge, rushes, and bedstraw. Soils.--Five soil units are mapped on the site (Ness and Fowler 1960) (Figure 3). Mukilteo peat, 0 to 2 percent slopes, (map unit Mg) is mapped in the depression in northern part of the project next to Tiger Lake. This series consists of peat that is deep, mainly decomposed sedges, spirea, twigs, and roots. It is very poorly drained and often ponded for many months of the year. Mukilteo peat is listed as a hydric (wetland) soil in Mason County. Alderwood gravelly sandy loam, 5 to 15 percent slopes, (map unit Ab) is mapped throughout the majority of the project action area. This well drained soil occurs on glacial moraines and was formed from mixed glacial till dominated by acid igneous rock. The imbedded gravel is mainly granite and quartzite. Everett gravelly sandy loam, 5 to 15 percent slopes, (map unit Eh) is mapped in the area nearing the south end of the linear project. This somewhat excessively drained Mason County Public Works October 8, 2008 Bear Creek Dewatto Road Improvement soil occurs as fairly continuous outwash channels between ridges of Alderwood soils. They have developed upon assorted glacial till and outwash material. This is the most extensive Everett soil. Everett gravelly loamy sand, 15 to 30 percent slopes, (map unit Ef) is mapped in a small section of the southeast part of the project. Except for slopes, this soil is similar to Everett gravelly loamy sand, 5 to 15 percent slopes. This soil occupies the smoother terraces or outwash plains in close association with other Everett soils. All of this soil is in trees and brush, and its best use is forestry. Everett gravelly sandy loam 15 to 30 percent slopes, (map unit Ek) is mapped in a small portion of the southern most area of the project. This soil is on the steeper slopes of glacial moraines, sides of gullies, and terrace fronts. It is more variable than Everett gravelly sandy loam, 5 to 15 slopes. The depth to substratum ranges from 12 to 36 inches, and the amount of gravel in the surface soil and subsoil varies greatly from place to place. Where the soil is in close association with the Alderwood soils, the substratum, in places, is compact and weakly cemented. IV Assessment of Impacted Wetlands The project will fill 9,962 square feet of wetlands. Of this area, 9,102 square feet is contained within two wetlands that are under the jurisdiction of the Army Corps of Engineers under Section 404 of the Clean Water Act. One of these (wetland B) is in the upper reaches of Mission Creek, the other (wetland 1-12) in the upper part of the Union River watershed. The remaining 860 square feet are contained within two isolated depressional wetlands with no surface connection to Section 404 waters. The wetlands were delineated in 2002 and 2007. All four wetlands are palustrine, scrub/shrub under the Cowardian vegetation classification system. All four were rated as Category III for function under the Washington Department of Ecology's wetland rating system. The individual areas of impact range from 348 square feet to 8,710 square feet. The details of the delineation and evaluation are included in a separate report. The impacts are summarized in the table and the wetlands are described below. Impact Mason County Created Wetland Impact Type & Class Area Mitigation Mitigation (sq. feet Ratio Creation Requirement WL-A Category III 348 2:1 696 PSSC WL-B Category III 8,710 2:1 17,420 PSSC WL-C Category III 512 2:1 1,024 PSSC WL-1-12 Category III PSSC 392 2:1 784 Total (square feet) 9,962 19,924 Mason County Public Works October 8, 2008 Bear Creek Dewatto Road Improvement Wetland A This is a small depressional wetland located immediately adjacent to the Bear Creek Dewatto road across from its intersection with Northeast Daly Road. It is approximately 2,500 square feet and has no outlet. It is a scrub/shrub plant community dominated by Pacific willow, Hooker's willow and hardhack spirea. One side is immediately adjacent to the Bear Creek Dewatto road. The other three sides are bordered by a logged-off area, which was harvested in the last ten years. The vegetation in the buffer area is a combination of Douglas fir, western hemlock, Scouler's willow, evergreen huckleberry, salal, red huckleberry and rhododendron. The wetland is seasonally ponded with water observed on 10/24/07. Hydrology appears to be primarily from rainfall. Wetland 8 This is a 15 acre depressional wetland located just south of the intersection of Bear Creek Dewatto Road and Sand Hill Road. It is divided by the Bear Creek Dewatto Road. It has a palustrine scrub/shrub plant community dominated by cascara, Scouler's willow, Pacific willow, and hardhack spirea. The wetland is in the shape of an inverted "u", running northeast to southwest. The outlet is on the southerly finger through a man-made ditch, which flows approximately 5,100 feet to the upper reaches of Mission creek. This wetland connects to Tiger Lake through a culvert with a flow-control weir on the lake. The wetland is seasonally flooded with ground water and rainfall. It is unknown how much water is contributed by the control weir on Tiger Lake. Wetland C Wetland C is a 4,224 square foot isolated depressional unit located midway through the project. It fronts the Bear Creek Dewatto road and has a driveway on the west side. Its palustrine scrub/shrub plant community has a very limited number of species. They include cascara, Pacific ninebark, spirea, horsetail and willow. Hydrology appears to come from groundwater and rainfall. There was some standing water on the unit in November 2007. In addition to the county road and driveway, a residence located within 200 feet of its northern boundary likely affects this wetland. Wetland H2 This wetland is a 6,860 square foot riverine depressional unit lying next to the Bear Creek Dewatto road. It is comprised of a scrub/shrub and emergent plant community. It is connected by a small stream and culvert under the road to an upstream wetland, which is approximately 1.7 acres in size. The larger wetland is also a scrub/shrub/emergent plant community. Dominant species include hard hack spirea, big leaf sedge, water parsley, lady fern and blue skullcap. Scattered tree species include red alder and western red cedar. Surface flow and groundwater provide the hydrology for these areas. Water flows through the area during the winter months, but is ponded during the summer. Maps in Appendix B show the detail of the project's impacts on each of the wetlands. V Description of Wetland Mitillation Area The proposed wetland mitigation site is a 2.3 acre area occupied by a segment of the existing Bear Creek Dewatto Road. It is included within a larger portion of the road, which will be abandoned as a result of the new road realignment. It is adjacent to two parts of a Category III scrub/shrub wetland. The existing wetland has been Mason County Public Works October 8, 2008 4�6 Bear Creek Dewatto Road Improvement rated as a Category III using the Department of Ecology's wetland rating system. It has low habitat value and moderate value for water quality and flood control influences. Other than the road, the site is surrounded by commercial forest land owned by Pope Resources. The existing wetlands are connected by a small culvert passing under the road. The mitigation proposal is to create a 19,962 square foot seasonally inundated scrub shrub wetland surrounded by a forest buffer. The mitigation site relative to the wetlands shown on the National Wetlands Inventory is shown in Figure 2. Figure 2 Mitigation site shown in purple �1 e 0 a A T23NRlVV <' o a 4 VI Mitigation Approach The project area includes a major wetland associated with Tiger Lake and numerous small isolated wetlands with no connection to flowing streams. To the maximum extent possible, the revised road alignment has been designed to avoid impacts to these areas. For example, the road through Wetland B does not vary from the existing alignment. This approach allows the county to keep its impacts at the minimum. Since that wetland was filled by the original road construction, the only new impact will be fill associated with bringing the slopes of the road bank up to current design standards. An alternative would have been to shift the road alignment in this area to match other segments of the project. That approach would have caused wetland impacts four times greater than the selected design. With the Mason County Public Works October 8, 2008 �L Bear Creek Dewatto Road Improvement exception of Wetland H2, all wetland impacts were confined to fill in areas, which are already adjacent to the toe of the existing road. The overarching goal of this mitigation plan is to re-connect two segments of a natural wetland, which were separated by the original road. This will be accomplished by achieving the following goals, objectives and performance standards: Goal 1 Re-connect the two wetland segments currently separated by the existing road and create a hydrological regime capable of supporting wetland vegetation. Objective Remove approximately 350 feet of existing road to an elevation matching the bottom of the wetland areas on either side. Performance Standard During the period March 1 to October 1, the soil in the wetland creation area will be saturated to within 12 inches of the surface for a minimum of 22 consecutive days. Goal 2 Replace the wetland functions lost due to the road construction project. Obiective Replace the capacity to remove sediment, nutrients, and toxicants by planting an emergent wetland community. Replace wildlife habitat by planting a diverse plant community of native vegetation in the wetland creation and buffer enhancement areas. Performance Standard In that portion of the wetland creation area planted with woody species, survival of planted species shall be at least 90% at the end of the first growing season. Canopy coverage shall be 25% at the end of the third growing season and 50% at the end of the fifth season following planting. Performance Standard Within the emergent wetland zone, planted species will cover at least 20% of the area by the end of the first growing season. Plant cover will be 40% of the area by the end of the third year and 75% at the end of the fifth year. Goal 3 Create/preserve a buffer around the created wetland area, which will protect the plant community and wildlife habitat. Obiective Mason County Public Works October 8, 2008 Bear Creek Dewatto Road Improvement Restore the previous roadbed on either side of the wetland creation area to a condition suitable for growing native shrubs and trees. Preserve the second growth timber around the created wetland. Performance Standard In the buffer enhancement area, woody shrubs and trees will have at least 90% survival at the end of the first growing season. Canopy coverage on this area will be 25% by the end of the third growing season following planting. Woody shrubs and trees will cover 50% of the area by the end of the fifth year following planting. Performance Standard Obtain a conservation easement from Pope Resources for the entire wetland mitigation site including the buffer area with standing timber. The easement to be recorded prior to construction of the road improvement project. Performance Standard Invasive species, such as Himalayan blackberry and Scot's broom shall cover no more than 15% of the planted areas. VII Site Design The top of the road is approximately six feet higher than the toe. The road toe is at an elevation that matches the floor of the wetland on either side. Road fill for a distance of 350 feet will be removed to match the wetland floor elevation. This will create a uniform grade from one side of the road to the other and allow the wetland segments on either side to be connected. An upland area adjacent to both the downstream wetland and the road will also be excavated to add to the created wetland. Impacts to the wetlands will be mitigated in accordance with the Mason County Critical Areas Ordinance. When wetland creation or reestablishment is used for mitigation, it is required at a ratio of 2:1 for impacts to Category III wetlands. The general goal of the mitigation is to create a wetland area that compensates for the loss of wetlands caused by the road project. The site selected for mitigation is currently part of the existing Bear Creek Dewatto Road. The road divides a wetland into two parts connected by a culvert. The mitigation project will remove the road segment and allow the wetland to become a single vegetation unit again. The planting prescription for the project will largely duplicate the plant community occurring in the natural wetland. The mitigation site has the added advantage of adding to one of the wetland areas impacted by the road project (immediately downstream). There are three components to the mitigation plan. They include wetland creation/reestablishment, buffer enhancement and buffer preservation. The mitigation site will be created b excavating the current road bed n an upland g y g and area next to the existing wetland. The road is acting as a dike between the two portions of the previously intact wetland. With the road prism removed, the water flowing through a culvert will spread out and supply the necessary hydrology to create a wetland plant community. In addition, part of the upland adjacent to the existing wetland will be graded to create additional wetland area. The former road Mason County Public Works October 8, 2008 Bear Creek Dewatto Road Improvement area beyond the new wetland will be graded and planted with upland species to create a buffer. Buffer planting will also take place on a small portion of the fill for the new road project. Finally, a significant part of the buffer surrounding the created wetland is mature second growth timber and advance conifer reproduction. A conservation easement will be negotiated with the landowner to preserve the mitigation area in perpetuity. The details of the site are shown on enclosed Appendix A. Grading will create 21,631 square feet of wetland. A minor amount of additional grading work will be needed to blend the contours of the created wetland into the surrounding ground. This will be accomplished by grading at a 2:1 slope from the edge of the wetland area to the top of the surrounding upland. A logging road approach and portions of the county road on either end of the wetland will be removed and filled with topsoil. Both the created wetland area and all graded areas will be over-excavated by one foot and filled with a uniform layer of topsoil. The buffer width for the created wetland will vary from 40 to 85 feet. A small part of the buffer will be created on the old roadbed location. The majority of the wetland buffer will be made up of mature second growth conifer and reproduction, which surround the created wetland area. It will be preserved through a conservation easement with the landowner, Pope Resources. A summary of the wetland mitigation area is shown below: Wetland Creation 21,631 square feet Buffer Enhancement 13,677 square feet Buffer Preservation 47,990 square feet Existing Wetland 16,891 square feet Plant selection for both the created wetland and buffer enhancement areas will duplicate that, which already occurs in the area. The buffer requiring planting will be constructed on old roadbeds and fill. The remainder of the buffer will consist of existing mature second growth conifer and advanced conifer reproduction. Planted buffer species and quantities are shown below: Physocarpus capitatus 100 Gaultheria shallon 100 Holodiscus discolor 100 Ribes sanguineum 100 Pseudotsuga menziesii 200 Mahonia aquifolium 100 The Douglas fir will be three year old transplant stock and the shrubs will be in one gallon containers. Created wetland species include: Salix lasiandra 900 ]uncus ensifolius 300 Spirea douglasii 200 Carex stipata 300 Carex obnupta 300 Carex comosa 300 The willow will be three foot long cuttings and the spirea will be in one gallon containers. The emergent plants will be in 10 cubic inch plug containers. VIII Maintenance and Contingency Plan The created wetland and buffer slopes shall be maintained when necessary to increase the survival of the plants, particularly with respect to providing water during Mason County Public Works October 8, 2008 Bear Creek Dewatto Road Improvement the summer months. Watering will be on an as-needed basis during the hottest months of the summer at an interval of once per week. Invasive plants will be controlled through a combination of mechanical removal and herbicide application. It is anticipated that an aggressive invasive plant control effort will be needed for at least the first three growing seasons following establishment of the mitigation site. If plant survival falls below the levels specified in the performance standards, the affected areas will be replanted with the appropriate species. Although the success of the mitigation plan is not ensured, it is likely to succeed because the site selected has a reliable source of hydrology. In addition, the native species selected for planting are growing well in the surrounding area. If there is not enough hydrology retained in the created wetland area, a weir can be installed at the lower end of the site to help retain water. IX Monitoring Plan Monitoring will take place over a five to ten year period. The length of the monitoring period will be determined by how quickly the performance standards are achieved. Soil saturation monitoring will take place at the beginning and end of March in each of the first three years following site establishment. If the performance standard for hydrology is met in each of those years, no further measurements will be taken. Plants will be monitored in years one, three and five following planting. A minimum of three longitudinal transects will be used to sample emergent plant coverage in the wetland creation area. They will be randomly placed and will sample a representative area of the site. Woody plant survival and canopy coverage in the wetland creation area will be sampled by installing a minimum of five five-foot wide transects perpendicular to the edge of the created area. Living plants will be counted and recorded. A minimum of four five by ten-foot plots will be used to sample survival following planting in the buffer enhancement areas. A minimum of three photo points will be established to visually record the development of the mitigation site. Pictures will be taken at each monitoring interval and included in the monitoring report. The monitoring report will be submitted to the respective agencies no later than October 31 of the year a report is due. Mason County Public Works October 8, 2008 v xipuaddb BEAR CREEK - DEWATTO ROAD IMPROVEMENT PROJECT �� \ \ WETLAND MITIGATION PLAN t E7�87�lO..E1tA1Q ( sod. so LEGMD ------------- lM LINE" U � I NE _-- -� - --s" ` "" REPR0DUC110N -cut an DES ROAD -� wt>: m WE m MASON COUNTY PUBLIC WORKS COUNTY ROAD NO.798W WETLAND MITIGATION :�•, ff P.D.BOX 1850 IFI �TY ENQI'� 415 N.SIXTH STREET BEAR CREEK-DEWATTO ROADSITE PU1N SHELTON,WASHINGTON 98584 -- COUNTY ROAD PROJECT x 1563(360)427-9670 BEAR CREEK - DEWATTO ROAD IMPROVEMENT PROJECT WETLAND MITIGATION PLAN socie I" Oqo \\ ` 1r/�N -———————————- QOSTINC VERAND \\ \ LaiF PEVLSIDttS DALE BY , _ MASON COUNTY PUBLIC WORKS COUNTY ROAD NO.79800 WETLAND MITIGATION - P.O.BOX 1850 COUNTY ENGINEER 415 N.SIXTH$TREEf BEAR CREEK-DEWATTO ROAD GRADING PLAN P SHELTON,WASHINGTON 98584 — COUNTY ROAD PROJECTx 1563 (360)427-9670 BEFORE P-1B BEAR CREEK - DEWATTO ROAD IMPROVEMENT PROJECT WETLAND MITIGA110N PLAN = ------------------- --- LEGOW ------------- EMSTINO rIE1LAW MASON COUNEX: COUNTY ROAD NO.79800 WETLAND MITIGATION COUNTY ENGINEER P.O. BEAR CREEK-DEWATTO ROAD ` sxFCT 415 N.S GRADING PLAN P-15 SHELTO( W)427-970 = COUNTY ROAD PROJECT# 1563 of (360)427-9670 AFTER P-18 BEAR CREEK - DEWATTO ROAD IMPROVEMENT PROJECT WETLAND MITIGATION PLAN h SYMBOLS iMB LOLS WETLAND SHRU8 1YX \IV1 , WETLAND EIIQ20DIT 1/IX REPRODUCTION GRADED UPLAND TIMBER i 4 �., / � 71•y yY. CREATED METLAND i 1 EXISTING WETLAND `\`. ii/ I i ` ''� \. qom�w EX1SIING WETLAND .\ REPRooucnoN TVAKR ... ... ————— 4 .k` ,i. , , r r 41 •. .. . •� W W yf�r�L W V, 'v a • ,yMok ,. • • •• ••� ATED WETLA �F I .---- — — � _ : • • • • a •9CY REPRODUCTION a . • . . . TIMBER EXISTING WETLAND �'?�._��W �� •� � � # ,,,�. LEGEND --—----- WETLAND SITE �� "` �� NOTE ---------------- EXISTING WETLAND \ �� TOGRADED AND SCHEDULE WETLAND TO PLAN71MANIm PER SCHEDULE IN TAME 1. � X TREE LINE JnlE REVLSIONS _ MASON COUNTY PUBLIC WORKS COUNTY ROAD NO.79800 WETLAND MITIGATION P.O.BOX 1850 Ss�er. 00UNTY ENGINEER 415 N.SIXTH STREET BEAR CREEK-DEWATTO ROAD PLANTING PLAN P-17 n@hC SHELTON,WASHINGTON 98584 _ (360)427-9670 COUNTY ROAD PROJECT z 1563 of P-18 Y� BEAR CREEK - DEWATTO ROAD IMPROVEMENT PROJECT WETLAND MITIGATION PLAN CROSS-SECTION B - B 15.63 ---- i ELEV. - 463.00 —30 —20 —10 0 10 20 30 20+40.00 CROSS-SECTION A - A 34.11 32.98 ELEV 463.00 —40-__- —J0 —20 —10 0 10 20 30 40 SO 21+60.00 CONSMUCTION NOTE ALL GRADED ALAS TO BE OVER—EXCAVATED ONE(1)FOOT TO ALLOW FOR PLACEMENT OF TOPSOIL. DATE I61 REY15fOfd Ga�£ MASON COUNTY PUBLIC WORKS COUNTY ROAD NO.79800 WETLAND MITIGATION r P.O.BOX 1850 steer n COUNT ENGINEER 415 N.SD(TH STREET BEAR CREEK-DEWATTO ROAD CROSS-SECTION G-18 SHELTON,WASHINGTON 98584 COUNTY ROAD PRO3ECT A' (360)427-9670 � P-la 1\ X Appendix B National Wetlands Inventory Map L10WH �, I ��.!`' PSSC PSSC y PSSC - fPSSC PABH PFOC l L1 OINH , J C'PFOA PFOA PSSC. 1; P n PFOC PSSC r�' PSSC c PSSC +SSC FgpiPSC PSSC d ? PSSC PEMA`PSSC A }PSSC I PFOC Ij, Fi " PF6C i `PSSC 1 T23NR1'1N I P �1 PSSC I I Impacted Wetlands Shown in Green J i MASON COUNTY PUBLIC WORKS BEAR CREEK DEWATTO ROAD REALIGNMENT WETLAND A, IMPACTS = 348 FT jIMPACTED WETLAND WETLAND DATE V MEvm9� L. MASON COUNTY PUBLIC WORKS COUNTY ROAD NO.7_¢QQ WETLAND MITIGATION s P.O.BOX 1850 $1�� COUNT'ENGINEER 415 N.SIXTH STREET BEAR CREEK-DEWATTO ROAD MP 7.3010.00 P=7 o..r prp SHELTON,WASHINGTON 98584(360)427-9670 COUNTY Rpgp PROJECT M 1563 os IMPACTED WETLAND P-18 i MASON COUNTY PUBLIC WORKS BEAR CREEK DEWATTO ROAD REALIGNMENT WETLAND 8, IMPACTS = 8710 FT OF .00 sp • WETLAND CONTINUE WETLAND y ` ND CON'DNUES 0 i� OPEN WATER ogIMPACTED WETLAND NN WETLAND DATE 9T Pimom DATE BY MASON COUNTY PUBLIC WORKS COUNTY ROAD 140.79800 WETLAND MITIGATION +a P.O.BOX 1850 sEr a COUNTY ENGINEER 415 N.SIXTH STREET BEAR CREEK-DEWATTO ROAD MP 7.30-MP 10.00 P=8 SHELTON,WASHINGTON 98584 _ (360)427-9670 COUNTY��PROJECT x 15A7 IMPACTED WETLAND °F P-18 MASON COUNTY PUBLIC WORKS BEAR CREEK DEWATTO ROAD REALIGNMENT WETLAND C, IMPACTS = 512 FT2 r / r r / / r i / I j l _..---- � I 1 ! 1 / IMPACTED WETLAND jWETLAND wreI xEvwws wre ar MASON COUNTY PUBLIC WORKS COUNTY ROAD NO.798W WETLAND MITIGATION �t* P.O.BOX 1850 COUNTY ENGINEER 415 N.SDCTM STREET BEAR CREEK-DEWATTO ROAD MP 7.30-MP 10.00 P_9 SNELTON,WASHINGTON 98584 COUNTY ROAD PROJECT# -- 1563 oc (360)427-9670 IMPACTED WETLAND 1PM\118 D MASON COUNTY PUBLIC WORKS BEAR CREEK DEWATTO ROAD REALIGNMENT WETLAND H2, IMPACTS = 392 FT WETLAND / IMPACTED WETLAND � / WETLAND sP • sP 20 _ - - ---d•--r--"`�,.. `""—.0 ,_�____..�,--'"ram `•----+��'' MTE REVISIaIb MASON COUNTY PUBLIC WORKS COUNTI'ROAD NO.79800 WETLAND MITIGATION :� P.O.BOX 1850 yE�, COUNTY ENGINEER 415 N.SIXTH STREET BEAR CREEK-DEWATTO ROAD MP 7.30-MP 10.00 P-10 SHELTON,WASMINGTON 98584 (360)427-9670 COUNTY ROAD PROJECT#LW IMPACTED WETLAND °F P-18