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HomeMy WebLinkAboutPOLESTAR VILLAGE - PDP220010 - SUBMITTAL DOCUMENTS - ROUND 2 - LANDSCAPE PLAN30% Design DATE:Revegetation NotesSHEET NO.:Pole Star Community, Fort Collins, CO10/24/2022 PREPARED FOR:PREPARED BY:EPSG: 2231 NAD83 Colorado North REVEGETATION, SOILS, AND BIOENGINEERING NOTES 1.Containers (shrubs and trees) shall be protected from beaver and other wildlife using the "plant protection" detail in plan set, where located above the bankfull elevation. Containers (shrubs) located below bankfull shall be protected from potential foot traffic with two wood stakes such that the above ground portion of the stake is at least as high as the canopy of the shrub container plant. Containers (herbaceous) shall not be fenced or staked. 2.All soil applied to the site must be free of Colorado state noxious and Colorado A and B listed weed propagules, and shall not contain more than 0.01% by dry weight of cheatgrass (Bromus tectorum), smooth brome (Bromus inermis), or Canada thistle (Cirsium arvensis). Project engineer or their representative shall approve all imported soil and fill for weed content before material is purchased. 3.A soil test shall be required for any import soils that may be required. The following soil chemistry characteristics must not be exceeded in soils that both receive seed or plant materials and have either been amended or installed between or over riprap: a. Soil pH shall be between 5.8 and 7.8. b. Soil electrical conductivity (using ECe method) shall be less than 2.0 dS/m (less than 2.0 mS/cm, less than 2,000 uS/cm, less than 2.0 mmho/cm). Imported compost shall not exceed 4.0 dS/m, regardless of the ratio at which it is incorporated into the topsoil or subsoil. c. Sodium absorption ratio of soils or imported compost shall be less than 3. d. Soil organic matter shall be between 10% and 20% by dry weight. The desired portion of recalcitrant organic matter, as a percentage of total organic matter, is between 10% and 40% by dry weight. e. In general, nitrogen supplementing is not recommended for native plant restoration, except in very small quantities when a deficiency in native or imported topsoil is noted. Based on the soil test, nitrogen additions may be required by the project engineer. f. In seeded areas, if imported topsoil is deficient in nitrogen and low in organic matter, soil amendments used shall include biosol (300-400 lbs/acre) and humate (300-500 lbs/acre) or similar. Compost may also be mixed with native soil to meet organic content requirements, only if the resultant topsoil meets the above soil chemistry criteria. 4. All seed must be inspected by the contractor prior to installation, and all tags must be maintained for documentation. All seed must be labeled as "certified" by the Colorado seed growers association and shall not include the presence of noxious or invasive species prohibited under the Colorado seed act. Seed must be free of Colorado state noxious and Colorado A and B listed weed propagules shall not contain more than 0.01% by dry weight of cheatgrass (Bromus tectorum), smooth brome (Bromus inermis), or Canada thistle (Cirsium arvensis). Project engineer or their representative shall approve all seed mixes for weed content and substitutions before seed is purchased. Seed identification and certification tags shall be provided to the project manager for review and approval prior to use. 5. A restoration ecologist should be consulted when reviewing weed-free seed, soil, mulch, and soil amendment products, including the list of potential weeds present in the product in question. 6. Seeding shall be broadcast at rates listed in seed mix, raked into the soil surface to a depth of between 0.25 and 0.5 inches deep, and covered with mulch at a rate that attains 70% soil coverage and is no deeper than 1". 7. THE SEED MIXES SHALL BE APPLIED TO AREAS AS SHOWN ON THE PLAN SET. 8. Mulch shall be aesthetically pleasing, and be able to withstand windspeeds up to 60 mph and remain in place. 9. Wood straw or wood shred shall be used for surface mulch on seeded and planted areas. If wood shred is used, it shall contain a diversity of wood fiber lengths, with less than 10% fines (i.e., less than 2" in length). If approved by the project manager, alternative weed-free and wind resistant mulch may be used. 10. The placement of surface mulch over seeded areas shall occur a maximum of 96 hours after seeding. Each shrub or tree planting shall be treated with mulch according to typical details. Mulch shall be kept 1-2 inches away from stems of shrubs and trees. Herbaceous plants shall not be mulched, except where indicated in the plan set. 11. Certified weed-free mulch shall be used in all situations. Proper labeling for each bale or lot of mulch used is required. Project manager has the right to inspect and reject bales if they are suspected to contain unacceptable weed contents. Specifically, smooth brome (Bromus inermis), cheatgrass (Bromus tectorum), Canada thistle (Cirsium arvensis), fireweed (Kochia scoparia), and other aggressive exotic plant species shall not be present in mulches used for the project. A restoration ecologist or botanist should be consulted when reviewing the weed-free mulch product. A list of potential weeds present in the mulch and the product information shall be provided to the project manager and project designer for review and approval prior to use. Hay, regardless of the source, shall not be used as a mulch. 12. Containers (herbaceous and woody) shall be planted as specified in the “plant palette" and "planting schedule" tables, and "revegetation construction details" of this plan set. 13. Each plant container must contain a label identifying the species in the container. Labels shall be left with the plant and be available for inspection by the project manager and project designer prior to installation, and must be kept in the ground following transplanting, for follow-up identification. 14.Ecotypic (i.e., sourced from genetically local populations) plant materials are required when available. Refer to the plant materials yellow pages (www.southernrockiesseed.org) for a list of vendors who carry ecotypic plant materials in Colorado. When ecotypes are not available, site adapted cultivars may be approved by the project manager if they are suited to the unique conditions of the site. For the purposes of this project, ecotypes are those plant materials (cuttings, seeds, or berries) whose origin meets the following criteria. Genetically unmodified native plant material that is sourced not more than 1,000 feet higher or lower (and preferentially not more than 500 feet higher or lower) in elevation than the work site, and not more than 100 miles north or south of the work site. 15. Shrubs and trees planted as container stock or bare-root stock shall be surrounded by a planting depression, including an irrigation berm, of 2" deep at the center of the depression, and 18” in diameter from berm to berm. 16. Due to the poor condition of substrate in which container stock will be installed, amended backfill (approved loam soil mix with between 20-40% organic matter by volume) shall be placed around their root balls to a width at least twice the diameter of the root ball and to a depth of at least one quarter the depth of the root ball. Amended backfill shall be tamped moderately to remove air pockets and watered thoroughly while backfilling around the root ball. Shall cover the root ball when roots are exposed on the upper surface of root ball. 17. Cuttings shall be installed within areas labeled as mesic or facultative hydroseres (i.e. zones), or as indicated in the plan set. These locations are generally at or near bankfull elevation. Cuttings shall be cottonwoods or willows, as specified in the "planting palette" of this plan set. Willow cuttings shall be installed at a frequency indicated in the "planting schedule". Harvesting and installation of cuttings (willow/cottonwood) shall follow the "field guide for harvesting and installing willow and cottonwood cuttings" (www.synergy3.org). Cuttings shall be ecotypes harvested from native populations. 18.Soil lifts, joint planting, and other bioengineering treatments shall follow typical details of the plan set. E1DRAFT 30% Design Mitigation Hydroseres - Plan ViewDATE: SHEET NO.:Pole Star Community, Fort Collins, COMitigation Hydroseres Crusher Fine Trail Emergent (0.04 ac) Mesic Meadow (0.3 ac) Facultative Understory/Riparian Forest Overstory (0.5 ac) Mesoriparian/Xeroriparian (0.2 ac) Upland (0.6 ac) Hydroriparian (willow/cottonwood cuttings) Riparian Forest Cottonwood Poles Mesoriparian/Xeroriparian Shrubs Trees to Remain 50' Natural Habitat Buffer Zone Existing Topography Saddle Ridge Natural Area Property Parcels Pole Star Project Boundary LEGEND Total Wetland Mitigation = 0.84 acres Riparian Forest Mitigation = 0.5 acres 10/24/2022 PREPARED FOR:Grading Guidlines for Mitigation Hydroseres (based on depth to groundwater, where 0' = groundwater elevation) Emergent: -0.5' to 0' Mesic Meadow: 0' to +0.5' Facultative: +0.5' to +1.5' Mesoriparian/Xeroriparian: +1.5' to +2.5' Upland: +2.5' and greater PREPARED BY:EPSG: 2231 NAD83 Colorado North E2 30% Design DATE:Planting PlanSHEET NO.:Pole Star Community, Fort Collins, COPlanting Plan Emergent/Mesic Meadow Seed Facultative Seed Upland Seed Emergent Containers Mesic Meadow Containers Facultative Containers Mesoriparian/Xeroriparian Containers Hydroriparian (willow/cottonwood cuttings) Cottonwood Poles Mesoriparian/Xeroriparian Shrubs 50' Natural Habitat Buffer Zone Existing Topography Saddle Ridge Natural Area Property Parcels Pole Star Project Boundary LEGEND 10/24/2022 PREPARED FOR:PREPARED BY:EPSG: 2231 NAD83 Colorado North E3 30% Design Erosion ControlDATE: SHEET NO.:Pole Star Community, Fort Collins, COErosion Control Treatments Koir 700 with Straw Underneath Wood Straw 50' Natural Habitat Buffer Zone Existing Topography Saddle Ridge Natural Area Property Parcels Pole Star Project Boundary LEGEND 10/24/2022 PREPARED FOR:PREPARED BY:EPSG: 2231 NAD83 Colorado North E4 30% Design DATE:Draft Seed MixesSHEET NO.:Pole Star Community, Fort Collins, CO10/24/2022 PREPARED FOR:PREPARED BY:E5 30% Design DATE:Draft Plant PalettesSHEET NO.:Pole Star Community, Fort Collins, CO10/24/2022 PREPARED FOR:PREPARED BY:E6 30% Design DATE:TypicalsSHEET NO.:Pole Star Community, Fort Collins, CO10/24/2022 PREPARED FOR:PREPARED BY:EROSION CONTROL MATTING - STAKE LAYOUT DETAIL PLAN VIEW NOT TO SCALE Stakes or staples 18" o.c. in bottom of backfilled trench Erosion control blanket Stakes or staples EROSION CONTROL MATTING CROSS SECTION NOT TO SCALE Overlap 12" of upwind/upstream fabric on top of downwind/downstream fabric Overlap 12" of upgradient fabric on top of lower gradient fabric Stakes or staples Stake pattern detailDOWNHILLSLOPE Overlap (TYP.) 6" Erosion control blanket EROSION CONTROL MATTING - TRENCH DETAIL CROSS SECTION NOT TO SCALE Backfilled trench Stake or staple 6" 6" PREVAILING WIND AND/OR STREAM FLOW DIRECTION 6" NOTES: 1. 2. Remove all rocks and logs greater than 4” diameter (st size) and seed area before applying erosion matting. Before installing erosion matting, decompact and prepare seedbed as indicated in project-specic restoration notes. 3. Seed and harrow area. 4. Use 100% biodegradable matting. 5. 6. Lay blankets loosely and install according to project specications with staples or wood stakes to secure matting. Stakes will have a maximum spacing of 24” on all sides in a checkerboard pattern. 7. Upwind portions of erosion control shall overlap 12” over the top of downwind portion. When applicable, upgradient portions of blanket shall overlap 12” of downgradient portions of blanket. Stakes shall be installed in a zig-zag pattern every 12”. 8. Erions control blankets shall be keyed into soil at the top of slope and upstream ends of project to a depth of 6”. These trenches shall be secured using staples or wood stakes, 18” on center, then backlled with soil and tamped well. 9. Density of stakes is depending on slope; claried in project-specic restoration notes. SHRUB PLANTING CROSS SECTION NOT TO SCALE 25 - 50% Deeper than rootball 2x Rootball diameter NOTES: 1.Broken or crumbling rootballs will be rejected. 2. 3. 4. 5. 6. 7. Care should be taken not to damage the shrub or rootball when removing it from its container. Backfll around rootball with soil that does not exceed specifcations in restoration notes. Excavate planting pit 2x the diameter fo the rootball and 25-50% deeper than height of rootball. Add backfll around rootball in 2” layers, watering each layer before applying the next of soil. Add 2” of mulch to cover 18” of the ground/dripline, leaving 1” open around trunk of shrub. Use part of the excavated soil to build an irrigation berm at the edge of dripline, about 1-2” high and 3-4” wide. Import soil as needed from nearby harvest sites. 2x depth of mulch Irrigation berm Undisturbed soil Amended backfll Container shrub Leave 3-4 later branches and terminal branch (do not cut terminal buds) Soil (dry) Max 5’ above ground Min. 3' of cutting below ground 6” min. Capillary fringe Low-season water table COTTONWOOD POLE PLANTING CROSS SECTION (TYPICAL)NOT TO SCALE NOTES: 1. 2. All harvested cottonwood cuttings shall be lively and straight, harvested within 50 miles of the project site, and no more than 500' lower or higher in elevation than the project site. If harvested, cuttings shall be obtained from approved sources using a sharp tool. 3.The pole should be approximately 8' in length. 4. 5. Cutting shall have a basal end of 1.0-2.0” in diameter. The top ends shall have the terminal bud with three lateral branches beneath the terminal bud intact. The contractor shall provide for the proper care, storage, and handing of the cuttings. During all stages of construction, the cuttings shall be protected from exposure to wind and direct sunlight. 6. 7. 8. 9. Cuttings shall soak for 10-20 days prior to installation, maintaining well oxygenated water while soaking. The bottom 2" should be re-cut at an angle immediately prior to installation. An auger or hammer drill must be used to create a pilot hole prior to installation of cottonwood poles. Backfill with very wet sand or loam, and tamp to ensure no voids develop around stem. Other suggested willow and cottonwood harvest guidelines are found at www.aloterraservices.com 12” min. WILLOW CUTTING CROSS SECTION NOT TO SCALE 8-12” above ground surface Willow cutting NOTES: 1. All willow cuttings shall be sound, healthy specimens. Plant materials that have serious injuries, insect pests, diseases or are overly dry, will be rejected. 2. If harvested, cuttings shall be obtained from approved sources using a sharp tool. Cuttings shall be long enough to reach depth of 6” into the groundwater during the driest times of the year. 3. Cutting shall have a basal end of 0.50-1.5” in diameter. The top ends shall be blunt and butt ends shall be cut at 45 degrees. They shall be stripped of all but two or three healthy terminal stems. 4. The contractor shall provide for the proper care, storage, and handing of the cuttings. During all stages of construction, the cuttings shall be protected from exposure to wind and direct sunlight. 5. Prior to installation, the contractor shall ag all planting locations for approval by owner’s rep. Adjustments to these locations may be required to meet eld conditions. 6. If cuttings cannot be installed directly into the required depth due to soil conditions, a dibble bar, auger or other tool shall be used to create a pilot hole. Space around hole must be eliminated to ensure good soil-stem contact. 7. Additional industry standards should be followed to ensure high survival rates. Pilot hole Existing soil Lowest seasonal groundwater level 6” min Min 8” of soil above low season groundwater Pack soil against planted cutting. E7