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Home My WebLink About2000-10-17 RRT Ltr to OPH Re LandscapingCOPIES DATE DESCRIPTION 4 2122/00 Landscape Plan, 30 x 42 sheet, no. A1.02, w/ revision 2 dated 9/26/00 • 9/26/00 Native Wetland & Buffer Area Seeding Specifications REMARKS: WE ARE SENDING YOU For your: r Approval Copies To: file, Mike Schech TO: City of Oak Park Heights 14168 North 57 Street P.O. Box 2007 Oak Park Heights, MN 55082-2007 ATTN: Kris Danielson/Katharine Widin P' Use LETTER OF TRANSMITTAL • DATE: PROJECT: RRT Project # 9907.01 Review and comment 10/17/00 USPS Oak Park Heights Carrier Annex VIA USPS the fallowing items: r Other Kris / Kathy — The attached landscape plan drawing has been revised to accommodate the storm water pond, and the tree preservation ordinance. This plan now provides a total of 350 caliper inches of trees. Kathy's 9/18/00 letter indicates that 744 caliper inches are required to be provided as a result of the trees lost due to the pond requirements. Unfortunately, there is not enough room on site to provide the required number of inches. As a result, the USPS has agreed to pay the City the fee option offered by Kathy in her letter. This will amount to 394 inches x $50finch = $19,700. This fee will be paid through the building contractor, ECI Building Contractors. Please review this plan, and let us know if it looks acceptable, or if you have any comments that we can incorporate into the plan. We can then proceed with the construction of the plan. We look forward to your prompt response. Thank you. SIGNED: Cidt‘P l'/WP‘fitr Chip Lindeke Project Manager RAFFERTY RAFFERTY TOLLEFSON ARCHITECTS 253 EAST 4TH STREET SAINT PAUL, MINNESOTA 55101-1632 TEL: 651-224-4831 FAX: 651-228-0264 NATIVE WETLAND & BUFFER AREA SEEDING SPECIFICATIONS PART ONE - GENERAL 1.00 PURPOSE This section identifies the work involved for site preparation and native seeding, the materials and methods to be used, and the maintenance obligations of the Contractor. 1.01 SCOPE OF WORK A. Site preparation B. Seed mixture C. Seed installation D. Seedbed preparation E. Maintenance 1.02 MEASUREMENT Measurement shall be as determined by the project manager and payment made on the pro -rata basis as installed, using units as allowed in the bid proposal. 1.03 SUBMITTALS Within thirty days of contract award, the contractor shall submit written certification from the supplier(s) of the native grass and wildflower seed. This certification shall include the following: A. name and location of the seed supplier(s); B. amount of seed purchased; C. origin and date of harvest for each type (species) of seed; D. the germination rate and percent purity for each type of seed. 1.04 QUALITY ASSURANCE A. Work shall be performed by or under the visual supervision of personnel experienced in prairie restoration or native grass seeding and familiar with the methods necessary to ensure the likely success of prairie plantings. B. Substitutions: If specified seed materials are not available, the Contractor shall submit proof of unavailability and proposal of equivalent for approval by the project manager. No substitutions will be approved unless they are native, adapted for growth on the site, and meet the origin criteria specified under Part Two of this section. 1 /2.4100 1.05 STANDARDS A. For the purpose of this contract, the following common and botanical names shall be used. Seed and root stock shall be of the following species, true to name, and mixed in the amounts specified in 2.01. CommonName Scientific Name Grasses Canada Bluejoint Big Bluestem Little Bluestem Fringed Brome Prairie Cord -Grass Prairie Dropseed Side -Oats Grwna Indian grass Switch grass Western Wheat-grass Canadian wild -rye Forks Heart-leaved Alexander Golden Alexander Azure Aster Flat top Aster Panicled Aster New England Aster Northern Bedstraw Black -eyed Susan Dotted Blazingstar Prairie Blazingstar Rough Blazingstar Thoroughwort Butterfly -weed Bush Clover Purple prairie Clover white prairie Clover Bottle Gentian Gray Goldenrod Upland Goldenrod Joe -Pye weed Pale -spike Lobelia Swamp Milkweed Stiff Tickseed Showy Tick trefoil Calamagrostrs canadensis Andropogon gerardii Schizachyrium scopariurn Bromus ciliatus Spartina pectinata Sporobolus heterolepic Boutelaua curtipendula Sorghastrum nutans .,rani cu m vi rga to m Agropyron smithii Elymus canadensis Zizia aptera Zizia aurea Aster oolentangiensis Aster umbellatus Aster lanceolatus Aster novae -angl iae Galiurn horeale Rudbeckia hirta Liatris punetata Liatris pycnostachya Liatris aspera Eupatorium perfoliatum Ascicpias tuberose Lespedeza capitata Dalea (Petalostemum) purpurea Dalea (Petalostemum) candidum Gentiana andrewsii Solidago nemoralis Solidago ptarmicoides Eupatorium maculatum Lobelia spicata Asclepias incarnata Coreopsis paimata Desmodium canadense * These species are legumes - see 1.07 -C B All native grass seed varieties and wildflower seed shall originate from Minnesota, eastern North Dakota, eastern South Dakota, western Wisconsin or northern Iowa unless otherwise approved by the project manager C. All native legume seed shall have been pre - inoculated with the proper bacterial culture for the particular legume species and in the manner and time frame specified by the manufacturer. For delineation of legume species, see 1.06 -A. D. Acceptable seed sources: All seed shall be supplied by one or more of the following vendors unless otherwise approved by the project manager: Reeseville Ridge Nursery 309 South Main Street P.O. Box 171 Reeseville, WI 53579 414-927-3291 Blue Vervain Hoary Vervain Common Yarrow Sneezeweed Wild Iris Shrubs Common Elder American Black Currant Gray -Bark Dogwood Red Osier Dogwood Leadplant* Prairie Rose Prairie Restorations, Inc. P.O. Box 327 Princeton, @ 55371 612-389-4342 Mohn Seed Co. Cottonwood, @ 56229 507-423-6482 Verbena hastata Verbena stricta Achillea rillefoiiur Helenium autumnale Iris versicolor Sa b ucus canadensis Rites arnericanur Carnus foe mina Cornus stolonifera Amorpha canescens Rosa arkansana Prairie Moon Nursery Route 3, Box 163 Winona, @ 55987 507 - 452 -1362 or 507 - 452 -5231 Prairie Ridge Nursery RR 2, 973 8 Overland Rd. Mt. Horeb, WI 53 572 608 - 437 -5245 E. Acceptable sources of Shrubs and Trees: The following companies have been identified as acceptable vendors for potted, balled and burlapped, and bare -root shrubs: Soil and Water Conservation District Offices (large quantities) Minnesota Department of Natural Resources (must be purchased in lots of 10=25 or more) 1.06 JOB CONDITIONS A. The Contractor shall perform installation as soon as possible (within the time frame specified in 3.02 -A) after grading and organic soil finishing is completed. B. All waste material and litter shall be removed from the site after seeding is completed. PART TWO - PRODUCTS 2.01 MATERIALS A. Seeding Rate Calculations: Seeding rates for the following plant types shall be based on the following respective units: Plant Type Units Grasses: pounds pure live seed,(PLS) /Acre Note: Pounds PLS Pounds Bulk Seed * Germination Rate * Purity (Pounds Bulk Seed is always greater than Pounds PLS) Wildflowers: Ounces Bulk Seed/Acre Nurse Crop: Pounds Bulk Seed/Acre B. Seed Storage: Seed shall be stored in a dark area at a temperature no higher than sixty degrees Fahrenheit and a relative humidity between 20 and 40 percent. Seed shall be protected from mechanical, chemical, and animal damage until the Contractor is ready to begin planting. C. Bare -root stock shall be planted within three days of purchase. Potted or balled and burlapped shrubs shall be planted within five days. 2.02 SEED MIXES AND RATES A. Upland buffer areas with excessively drained to well - drained soils (at least six grasses and nine forbs from the following lists) Grasses Pounds Pure Live Seed/Acre Big Bluestem Little Bluestein Fringed Brome Prairie Dropseed Indian grass Switch grass Side -oats G rama Western Wheat-grass Canadian wild -rye Forbs Ounces Bulk Seed/Acre Golden Alexander 3.0 Azure Aster 4.0 Northern Bedstraw 1.0 Dotted Blazingstar 2.0 Rough Blazingstar 2.0 Butterfly -weed 2.0 Bush Clover 2.0 Purple prairie Clover 3.0 White prairie Clover 3.0 Gray Goldenrod 2.0 Upland Goldenrod 2.0 Leadplant 2.0 Rose Prairie 2.0 Stiff Tickseed 1.0 Hoary Vervain 2.0 Common Yarrow 1.0 Nurse Crop Pounds Bulk Seed/Acre Oats 20.0 1 . The following native shrubs or bare -root stock may be substituted for forbs in buffer areas. See Section 3.02E for installation specifications. 5 5.0 5.0 1 ,0 2.0 .5. 2.5 2.5 2.0 2.0 Shrubs Cumulative Seedlings /Acre Common Elder American Black Currant Gray -Bark Dogwood Red Osier Dogwood Prairie Moon Nursery Prairie Restorations, Inc. Minnesota Department of Transportation (MNDOT) Standard Specifications for Construction (Nov. 20, 1995) Big Bluestem Little Bluestem Side -Oats Grarna* Indian grass Switch grass Golden Alexander Flat - topped Aster Marsh Aster New England Aster Black -eyed Susan Prairie Blazingstar Thoroughwort Butterfly -weed 60 2. The following seed mixes provided by the seed source companies listed in part 1.06 C. may be used in place of the grasses and forbs listed for dry or sandy soils above (nurse crop is still required): Company Seed Mix Name Short Grass Prairie for Dry Soils Mix Tall Grass Prairie for Dry Soils Mix Short/Dry Grass Seed Mix with Short/Dry Wildflower Mix 33A with SE forb mix 35A with SE forb mix 38A with SE forb mix B. Wet meadow margins and mesic upland buffers with moderately well drained or somewhat poorly drained soils (include any four grasses and at least seven forbs from the following lists:) Grasses Pounds Pure Live Seed /Acre Wildflowers Ounces Bulk Seed /Acre 5.0 5.0 2.5 5.0 2.5 3.0 1.0 2.0 4.0 5.0 5.0 2,0 2.0 Purple Prairie Clover Bottle Gentian Joe -Pye weed Leadplant* Pale Lobelia Swamp Milkweed Showy Tick- trefoil Blue Vervain *Delete from mix in somewhat poorly drained soils. Nurse Crop Pounds Bulk Seed /Acre Oats 20.0 1. The following native shrubs or bare -root stock may be substituted for forbs in buffer areas. See Section 3.02E for installation specifications. Shrubs Common Elder American Black Currant Gray-Bark Dogwood Red Osier Dogwood Prairie Restorations, In Minnesota Department of Transportation (MNDOT) Standard Specifications for Construction (Nov. 20, 1995) Cumulative Seedlings /Acre 60 2. The following seed mixes provided by the seed source companies listed in part 1.06 O. may be used in place of the grasses and forbs listed for moderately well to somewhat poorly drained soils listed above (nurse crop is still required) : Company Seed Mix Name Prairie Moon Nursery Short Grass Prairie for Mesic Mix Tall Grass Prairie for Mesic Mix 15A with SE forb mix 20A with SE forb mix 25A with SE forb mix 2.0 2.0 2.0 2.0 2.0 2.0 3.0 2.0 c. Mixed Height/Mesic Mixwith Mixed Height / Mesic Wildflower Mix C Wet meadows with poorly to very poorly drained soils (include any four grasses and at least seven forbs from the following lists:) with Mix f orb mix Grasses Pounds Pure Live Seed /Acre Canada bluejoint Big bluestem Indian grass Switch grass Prairie cord grass Wildflowers Ounces Bulk Seed/Acre Black -eyed Susan 5 . 0 Blue vervain 2 . 0 Golden Alexander 3.0 Joe -pye weed 2 . 0 New England aster 4 . 0 Prairie blazingstar 5.0 Showy tick- trefoil 3 . 0 Sneezeweed 4 . 0 Wild Iris 4 . 0 Yellow Coneflower 5 . 0 1 . The following seed mixes provided by the seed source companies listed in part 1.06 C. may be used in place of the grasses and forbs listed above for poorly drained soils (nurse crop is still required): Company Prairie Restorations, Inc Minnesota Department of 25A with wet Transportation (MNDOT) Standard Specifications for Construction {Nov. 20, 1995) Nurse Crop: 4.0 5.0 5.0 2.5 4.0 Seed Mix Name Tall /Wet Grass Seed Mi Tall /Wet Wildflower PART THREE - EXECUTION 3.01 Site Preparation 3.02 INSTALLATION Oats 20.0 8 A. Prior to seeding, any existing vegetation that provides more than 25% ground cover in the area to be seeded shall be killed, using either method 1. or 2. as follows: I . Apply a non - selective, non - residual post - emergence herbicide labeled for use in wetlands (i.e. Roundup, Rodeo) and acceptable to the project manager. The label shall be submitted to the project manager for review at least three days prior to the contemplated date of application. The application shall be performed in compliance with the herbicide label and state regulations concerning pesticide application certification. Seven to 14 days after herbicide application all residual vegetative top growth, shall be removed by burning or by mowing at a maximum height of two inches using a rotary mower. 2. Till the site with a plow, disc, or harrow to a depth of four to eight inches and to the extent necessary to break up root systems and soil clods to the point where the average clump is less than two inches in diameter. B. Using a rolling -type packer, pack any areas of tilled, loose, or regraded soil within the zone to be seeded. A. Seeding shall be conducted between May 1 and June 15 or between October 15 and freeze up. Seeded areas shall be mulched with clean straw at a rate of 1.5 tons per acre within three days after seeding is completed and the straw shall be anchored with a disc or tackifier. B. Grass and flower seed shall be mixed and the seed shall be planted using the method outlined below: Seed shall be sown using an agricultural type seed drill designed for planting native grass seed. Specified seed drills include the Truax Native Grass Drill (available from Truax Company, Inc., 3 609 Vera Cruz Ave., Mpls., MN 55422, 612-537-6639) and the John Deere 1550 Power -Till Seeder. A no -till attachment or no -till drill will be used if seed will be planted into dead sod (see sprayed areas under 3. 01 -A). 3.04 MAINTENANCE Seed shall be sown approximately 1/8 to 1/4 inch deep and no deeper than 1/2 inch. The drill shall be calibrated at half the appropriate seeding rate and each area shall be drilled twice to help ensure even distribution. C. No fertilizer shall be applied to planted buffer areas. D. Within two days after seeding, the seeded areas shall be packed with a rolling - type packer. Ea Shrubs shall be planted between mid -April and the end of May and shall be clearly marked with flagging or temporary fencing to avoid destruction during grass and forb maintenance. Shrubs shall be planted at a cumulative rate of 60 plants per acre and shall be distributed to provide a natural appearance shrubs shall not be planted in rows. The planted area shall then be mulched with clean straw at a rate of 15 tons per acre within three days of planting. A. The seeded area shall be mowed at a height of 6 to I 0 inches, using a rotary mower, twice and at 30 -day intervals during the first growing season following seeding. Shrub plantings shall be avoided during mowing operations. B . During the first two years, the developer shall replant any buffer vegetation that does not survive. After two years, if the condition of the buffer area changes through natural processes not caused by the property owner, the owner shall not be required to reestablish the buffer area. 3.05 FIELD QUALITY CONTROL A. Plantings will be accepted by the project manager after inspection at the end of the first growing season, provided the nurse crop shows a reasonably even distribution and seedlings of early - germinating prairie species are present in a reasonable density. Annual monitoring will be conducted in accordance with the Minnesota Wetland Conservation Act.