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Home My WebLink AboutDetention Ponds' STORMWATER POND NOTES: 1. All sedimentation and erosion controls will be established before grading begins. 2. Temporary devices and structures to control erosion and sedimentation in and around the wetland site ahu|| be properly maintained at all Orneo. The devices and structures shall" be disassembled and disposed of no later than november 1` three full growing seasons after planting. Sediments collected by these devices will be removed and placed upland in q^` manner that prevents its transport into o wetland or waterway. ,^ ' J. Native topsoil owoUob|e on site will be stockpiled and re—used in the pond bottorno� Six inches of native topsoil will be applied to all otormwoter ponds. 4. All storrn*oter ponds will be seeded with new eng|ond erosion control/restoration mix or new mngiond wetrnlx(New England P|onba. Inc., Amherst, MA., Ph 413-258-1752\ or equivalent at their specified application rates. 8. Planting and seeding will take place in the spring or fall planting periods to maximize plant survival and seed gemination. 1 , 7. To reduce the immediate threat and minimize the long—term potential of degradation' the species included on the |nYask/m plant species list in the U.S.Corps wetland mitigation performance standards and supplemental information doted 2/21/02 are not included oo planting stock in the overall project. Only plant nluterio|a native and indigenous to the region ahoU be used. Wherever possible, woody plants from the wetlands to be disturbed will be reused in the expansion/creation area. B. A certified oo{{ scientist or qualified wetland scientist will inspect the wetland work in the expansion/creation area. � 8. A certified soil scientist or qualified wetland scientist will locate the sites for planting the shrubs. ' r ' 10, The |000| inland wetlands commission will be notified before work begins and also be notified upon oornp|odon of the mitigation site and plantings so that they may inspect. ' Aew England Erosion C-onirol/Restoration Mix tfor Detention Basins and M"oist S415ites The New England Erosion Control/Restoration Mix contains o selection of native grasses and wildflowers designed to colonize generally moist, recently disturbed sites where quick growth of vegetation is desired to stabilize the soil surface. This seed mix uses plant genotypes from the Northeastern states. This mix is particularly appropriate for detention basins which do not normally hold standing water. The plants in this mix can tolerate infrequent inundation, but t onnmto t flooding. In New England, the best -nosu|tm onn obtained with o Spring seeding. Summer and Fo|| seeding can be ouooeaafu| with o light' | h|ng of weed free 'straw to conserve moisture. Lute Fu|| and YV|ntw",dormant seeding require o slight increase in the seeding rota. Fertilization is not required unless the soils are porUou|ork/ infertile. � 4pPU{ATDM RATE: 35 RE 1245 sq ft/ lb 61-V011�� Tkogo Doertongue (pon|ourn o|ondeoOnurn), Creeping Red Fescue (Feotuoo rubra), Switohgroos /Ponlcurn virgatum), / \ Fowl Bluegrass (Poa palustris), Creeping (Agrostis stolonifera), Silky Wild—rye (Elymus villosus), Canada Wild—rye (Elymus canadensis), Partridge' Pea (Chamaecrista fasciculata), Soft Rush (Juncus effusus), Flat—top Aster (Aster" umbellatus), Jo'e—pye Weed (Eupotorium fistulosum), Boneset (Eupatorium perfoliatum), Blue Vervain (Verbena hastat(i), Nodding Bur—Marigold (Bidens cernua), Canada Goldenrod (Solidago conadensis), Grass— leaved Goldenrod (Solidago The wetland seed nn|x contains o vvkja variety of notk/a seeds which one suitable for most wetland mitigation and restoration sites which are not permanently inundated. All species are best suited to moist disturbed ground as found in most wet meadow, scrub shrub, or forested vvet|o d mitig(ition and restoration onxon. This mix in well suited for detention basin borders' and the bottom of detention basins not generally under standing water. The seeds will not germinate under inundated conditions. If planted during the fo|| months, the seed rn\x will germinate the following spring. During the first 000aon of growth' several species will produce seeds, while other species will produce seeds after the second growing season. Not all species will grow in all wetland situations. This nn|x is composed of the wetland species most likely to grow in created/restored wetlands, and should produce more than 75% ground cover in one full growing season. The wetland seeds in this mix can be hand sown, used with o hand—held spreader, or hydro—seeded on large or hard to reach o|beo' as long as there is no permanent snow cover. Lightly rake to ensure proper soil—seed contact. Seeding can take place on frozen snl|' as the freezing and thawing weather of late fo|| and early winter will work the seed into the soil. If spring conditions are drier than usual, watering may be required. If planting during the ournnner months, watering may be required for at least 2-3 weeks after planting to ensure germination. A non—invasive annual such on winter rye may be added to the mix to obtain ao|| otob/||zot|nn cover in the fo||' Do not odd annual ryegrass, Kentucky Bluegrass or perennial ryegroos on these species are very aggressive and they will inhibit the growth of the wetland seeds. A light rnu|oh of o|oon, weed—free straw is recommended. APPLICATION RATE: 1 LB/5000 SQ. FEET AS AN UNDERSTORY SEEDING 1 UB/2500 SQ. FEET AS A WB- MEADOW SPECIES Fowl Bluegrass (Poo po|uotMo\' Fringed Sedge (Carex odnito\' Water Plantain (Aliorno plantago—oquaUco), Chufa (Cvperuo esou|mntus)' Green Bulrush (Scirpua otrnvrena), Soft Rush /Juncum effuaulo\' Bearded Sedge /Connx onrn000\, Lurid Sedge (Carex |urido\, Hop Sedge (Carex |upuUnu\, Bonwoet /Eupotodurn perfo|ioturn\, New York Aster (Aster novl—be|gU\, Swamp Aster /Aohar pun|ceuo\, Spotted Joe—pye vveed'(Eupotohurn FIRE POND LANDSCAPINU: SOUTH DETENTIO&N';;'BA,.O,�%-,IN'-'/-'', 01 loiii 111 NAME NWI Wetland Quantifty/Description Functions/Benefits Indicator Status Shrubs Highbush blueberry Facultative 18" tall shrubs, to be Wildlife food source, aesthetics (Vaccinum Cormbosum) Wetland planted in 115 foot wide band above pond edge Winterberrry Holly Facultative .18' tall shrubs, to be To provide erosion control, Soil (Ilex Verticilata) Wetland planted along the wate dine stabilization, wildlife cover and of the finished pond food Silky Dogwood Facultative 18" tall shrubs, to be To provide erosion control, (Cornus sercica) Wetland planted in 15 foot wide dense growth, and wildlife food band above pond edge source, wildlife cover, aesthetics Arrowwood (Viburnum Facultative 18" tall shrubs,.to be Aesthetics, wildlife food source recogniturn) Wetland planted in 15 foot wide band above pond edge New England Erosion Variable To be seeded in all areas Soil stabilization, establish Co ntro I/Resto ration Mix or between elevation 210 and herbaceous wetland plants equivalent 220 in north pond and 204 214 in south pond. New England Wet Mix Variable To be seeded in all areas Soil stabilization, establish below elevation 210 in north herbaceous plants as wildlife pond and 204 in south pond food source LANDSCAV I N U: NO RTH DETENTION BASIN PCOLffik K.-ngineers, ina.7