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HomeMy WebLinkAboutJoint-Use Mitigation Plan - PLN General - 8/28/2017 RECEIVED SEP 2 2 2017 615 W. Ader Sued .Mitigation Plan for Hunter Family Farm and James & Joan Hunter Joint-use Pier, Ramp and Float Project NWS 2015-239 Plan Dated August 28, 2017 SS SSmv) MARINE SURVEYS Et ASSESSMENTS 267 Hudson St. Port Townsend WA 98368 (360) 385-4073 marine.surveys.inc@gmail.com r Hunter Project �WS 2015-00239 Mitigation Iter- -#1: Buoys to be Removed Details Buoy#1 Lat 47.3579930 Long-123.014668°. 109' from shore Size=tire filled with concrete—about 1 cu ft Buoy#2 Lat 47.3581190 Long-123.01510000 212' from shore Size=2' by 2' by 2' concrete block(8 cu ft) Buoy#3 Lat 47.3577550 Long-123.015273' 156' from shore Size=55 gal.Barrel(approx. 24"in diameter—7.35 cu ft) Buoy Locations 4� N - rr\ fir.• �.a .,,�� r � f Mitigation Items # 2 and 3: Removing Old Marine Railway Footings & 10'x10' Float 0 25' 10' 50' T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 10F JOF 20F 10F 10F 'OF 10F 10F 106 106 10G 10G 106 106 106 10& 106 10G toG 105 1�� IDS 2� 2� 1�� �� 2�5� 2� 105 105 170 10F 20F 20F 3UF 1 pp toe -5.3 1OG 10'6 105 11=S 105 106 10G 105 10G 105 10F 10F SOS 10S 105 160 20 F 3 10 6 10 G �� -4.3 20F 20F 10F 1OF to 11 I ' ' ' 1 1 I 10�F 1I F '� .� 106 106 206 Approximate 1 21EGT 10� 30 F I Float location 1 1 30F 2 14010'x10' 10 G 20 G '� 18 t=6T ( -3.3 ...■ 10 F 30 F 10-30 10 F 120 lots -1.3 100 MACROALGAE AND .� 0.7 %COVERAGE PER SQUARE METER: F=Filamentous Reds G=Gracilaria S.=5. latissima 80 3.2 - Number and EGT= number of Zostera l sz Marina turions 60 =5 0 4'7 NOTE; Only macroalgae approx i at %coverage of 1TI. or greater are seen on this map. _ 40 6.6 20 8.3 Distance along T6 and tidal elevation (MLLW)in feet 0 -- 10.0 Concrete bases from old marine railway 14" w x 7" d x 6' long Some are at or below beach level Approximately 62.9 square feet of concrete debris i r _ F- s' ;- • Y E • , ..f �I � , • L is • • �,,M•..r - an Float to be Removed Mitigation Item# 4: Planting Plan August 28, 2017 Total Planted Area = Approximately 1440 ftz Mitigation Planting and Monitoring Plan for Hunter Family A.Mitigation Plan Mitigation is required for this site as the proposed structure will be built on a shoreline of statewide significance and will impact critical habitats.Native plants will be installed along the top of the top of the bulkhead replacing the grass which continues from the road to the edge of the bulkhead. The planting plan area can be seen in Figure 1 (planting plan map)and in Figure 2 (photos). Plants will be installed in a 6 foot by 240 foot area just above the bulkhead. Nootka Roses will be installed at 4 foot centers for approximately 240 feet skipping the area in front of the proposed structure. Other species will be interspersed. The plants selected for this site are all native plants that can tolerate salt spray from the marine environment. They were selected to improve the overall value of the functions in this critical area buffer. Soil stability,nutrient input, and wildlife habitat were all important factors. Following is a table showing the plant species and numbers for the planting area. Plants will be selected from a regional native plant nursery. Plant List Quantity Botanical Name Common Name Size 36 Rosa Nutkana Nootka Rose 2 Gal 4 Holodiscus discolor Ocean spray 2 Gal 8 Ribes sanguineumRed-Flowering Currant 2 Gal 6 Vaccinium ovatum Evergreen Huckleberry 2 Gal 12 Leymus mollis Dunegrass 1 Gal 10 Gaultheria shallon Salal 1 Gal Plants should be installed in late fall or early spring following the construction work. During these times plant are semi-dormant and soils are easier to work.Plants will be laid out by hand generally following the spacing specified on the planting plan map (Figure 1). The plants will be installed by digging a one to two foot hole, loosening the soil,placing the plant in the ground after loosening soil around the root ball. The hole must be deep enough to ensure the roots are straight,but not so deep as to bury plants too far above the root collar. Once the plant is in place,the hole will be backfilled and tamped lightly.Mulch should be applied 3" deep around plants,being careful not to touch the stem of the plant.No extraordinary measures are proposed at this time to protect installed plants other than mulching,weeding and watering. Substitutions might be necessary for species or individuals that cannot be found at local II nurseries.All plant substitutions will be approved by the project biologist prior to installation to ensure their suitability for the site. B.Performance Standards Performance standards are measurable criteria for determining if the goals and objectives of the mitigation project are being achieved. If the proposed benchmarks are not achieved by comparing the surveys to the mitigation goals,then contingency plans will need to be implemented. Performance Standard#1 (survival rate): Immediately after planting,all plants will be counted and documented. At the end of each growing season(late Aug-early Sept)plots will be visited and a count of surviving plants will be documented. The percent survival for the plots will be calculated by dividing the total number of plants after planting by the total number of surviving plants at the end of the season. Photo stations for the replanting site will be determined and a photograph of each transplant location will be taken on an annual basis. Individual plants that die must be replaced with native species I order to meet the survival performance standards. Performance Standard#2 (percent cover): The percent cover standard will be monitored by looking at each monitoring unit of the enhanced areas from above and estimating the area covered by the individual species. The percent cover within an area can be quantified as a total greater than 100%because plants (in tree,high/low shrub and herbaceous layers)overlap uncover. C. Monitoring Plan An as-built drawing and report will be submitted as documentation of the implementation of the approved planting plan within one month of installation. The plan will include vegetation description and photo documentation from established photo stations.A panoramic photo of the entire mitigation site will also be provided. Photos should be taken June-August, during the growing season. Monitoring will take place over a period of five years at the end of the growing season(late August or early September) of each monitoring year. The performance standards will be monitored by measuring plots in zones within the planting area that will be established and mapped after planting occurs, on the as-built plan. There will be photo points for each plot and they will be referenced on the as-built plan. Each year,the photo points established at each site will be used for comparison. Photos will be taken at all points for all years as visual documentation of the performance standard's progress,or lack thereof. In addition to photos at designated points,photo documentation must include a panoramic view of the entire planting area. Submitted photos must be formatted on standard 8 1/2"by 11"paper, dated with the date the photo was taken and clearly labeled with the direction from which the photo was taken. The photo location points must be identified on an appropriate drawing. Collected data and photos will be compiled into an annual Riparian Planting Report each year and submitted by November 30 of each monitoring year for five years. Each annual monitoring report shall include written and photographic documentation on plant mortality and replanting efforts and must document whether the performance standards are being met. Monitoring results will determine whether or not contingency measures will be needed. Performance Standards#1 & 2 Year 1:Achieve 100% survival success of replanted natives into mitigation areas. Year 2: Achieve 100% survival success at end of second year into mitigation areas. Year 3: Achieve 80%survival success at end of third year into mitigation areas. 0' -N 75' Nootka Rose 10, 50' 100, tL Red Flowering Currant jV Oceanspray PL 115' from bulkhend/MNNW Dune9 rass J-� Evergreen Huckleberry Salal PL T PROPOSED JOINT USE STRUCTURE Q - s MHHW = 11.8' (MLLW) 3 IS I' UP THE BULKHEAD c BULKHEAD i 12' ROW 30' -- -- FOG LINE 5R 106 CENTER LINE Year 4: Achieve 80%survival success at end of fourth year into mitigation areas. Year 5: Achieve 80%survival success at end of into mitigation areas. D. Maintenance and Contingency Maintenance shall occur at least twice during the growing season to ensure the survival of all native species within the mitigation area,including volunteer natives.Watering by hand or sprinkler may be necessary during year number one until the plants are established. Water requirements will depend on the timing of planting with the seasons and weather conditions. Once plants are established, extra watering may not be necessary.Hand weeding will be necessary around all plants that are being monitored to ensure survival and coverage. If the required rate is not met by the end of any monitoring year,plants lost to mortality will be replaced to achieve the percentage cover called for in the performance standard described above. Prior to replacement, an appropriate assessment will be performed to determine if the survival was affected by species/site selection, animal damage, or some other factor. Subsequent contingency actions must be designed to respond directly to the stressor(s),which are increasing mortality of planted native species. If a particular species is shown not to endure site conditions then another,more appropriate species will be selected. If excessive damage is observed,protective measures will be introduced.Monitoring years may be added if significant replanting becomes necessary. Monitoring on an annual basis for five years will occur with photographs to determine the survival rate of the transplanted area. If 100% success is achieved during the first two years or 80%success rate during the last three years,monitoring will continue without extra replanting efforts. Within the five year time period,transplanting will occur on an annual basis to replace any plants that are lost until 80% success is achieved.