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INTER WEST — EVERETT CONTRACTOR'S YARD INTERIM FILL PROJECT Sitts & Hill Engineers, Inc. <br />' CONSTRUCTION STORMWATER POLLUTION PREVENTION PLAN Job Number 17,733 <br />this mixture at a rate of 60 pounds per acre. Consult Hydraulic Permit Authority <br />(HPA) for seed mixes if applicable. <br />Table 11-4.1.6 Wet Area Seed Mix* <br />% Weight <br />% Purity <br />% Germination <br />Tall or meadow fescue <br />Festuca arundinacea or Festuca ela- <br />60-70 <br />98 <br />90 <br />tior <br />Seaside/Creeping bentgrass <br />10-15 <br />98 <br />85 <br />Agrostis palustris <br />Meadow foxtail <br />10-15 <br />90 <br />80 <br />Alepocurus pratensis <br />Alsike clover <br />1-6 <br />98 <br />90 <br />Trifolium hybridum <br />Redtop bentgrass <br />1-6 <br />92 <br />85 <br />Agrostis alba <br />1. Modified Briargreen, Inc. Hydroseeding Guide Wetlands Seed Mix <br />Table II-4.1.7 Meadow Seed Mix (p.282) lists a recommended meadow seed mix <br />for infrequently maintained areas or non -maintained areas where colonization by <br />native plants is desirable. Likely applications include rural road and utility right-of- <br />way. Seeding should take place in September or very early October in order to <br />obtain adequate establishment prior to the winter months. Consider the appro- <br />priateness of clover, a fairly invasive species, in the mix. Amending the soil can <br />reduce the need for clover. <br />Table 114.1.7 Meadow Seed Mix <br />Weight% <br />Purity <br />% Germination <br />Redtop or Oregon bentgrass <br />20 <br />92 <br />85 <br />Agrostis alba or Agrostis oregonensis <br />Red fescue <br />70 <br />98 <br />90 <br />Festuca rubra <br />White dutch clover <br />10 98 <br />90 <br />Trifolium repens <br />Roughening and Rototilling: <br />. The seedbed should be firm and rough. Roughen all soil no matter what the <br />slope. Track walk slopes before seeding if engineering purposes require <br />2014 Stormwater Management Manual for Western Washington <br />Volume 11 - Chapter 4 - Page 282 <br />SITTS & HILL ENGINEERS, INC. 34 <br />TACOMA, WASHINGTON <br />