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I <br /> 111 <br /> The seed mix shown in Table 4.5 is a recommended low-growing, <br /> I relatively non-invasive seed mix appropriate for very wet areas that are <br /> not regulated wetlands. Other mixes may be appropriate, depending on <br /> the soil type and hydrology of the area. Recent research suggests that <br /> I bentgrass (agrostis sp.) should be emphasized in wet-area seed mixes. <br /> Apply this mixture at a rate of 60 pounds per acre. <br /> I Table 4.5 <br /> Wet Area Seed Mix* <br /> %Weight %Purity %Germination <br /> Tall or meadow fescue 60-70 98 90 <br /> Festuca arundinacea or <br /> I Festuca elatior <br /> Seaside/Creeping bentgrass 10-15 98 85 <br /> I Agrostis palustris <br /> Meadow foxtail 10-15 90 80 <br /> Alepocurus pratensis <br /> Alsike clover 1-6 98 90 <br /> Trifolium hybridum <br /> I <br /> Redtop bentgrass 1-6 92 85 <br /> Agrostis alba <br /> I *Modified Briargreen,Inc.Hydroseeding Guide Wetlands Seed Mix <br /> The meadow seed mix in Table 4.6 is recommended for areas that will be <br /> maintained infrequently or not at all and where colonization by native <br /> I plants is desirable. Likely applications include rural road and utility right- <br /> of-way. Seeding should take place in September or very early October in <br /> order to obtain adequate establishment prior to the winter months. The <br /> I appropriateness of clover in the mix may need to be considered, as this can <br /> be a fairly invasive species. If the soil is amended, the addition of clover <br /> may not be necessary. <br /> ITable 4.6 <br /> Meadow Seed Mix <br /> %Weight %Purity %Germination <br /> Redtop or Oregon bentgrass 20 92 85 <br /> Agrostis alba or Agrostis oregonensis <br /> I Red fescue 70 98 90 <br /> Festuca rubra <br /> White dutch clover 10 98 90 <br /> Trifolium repens <br /> IMaintenance • Any seeded areas that fail to establish at least 80 percent cover(100 <br /> Standards percent cover for areas that receive sheet or concentrated flows) shall <br /> I <br /> be reseeded. If reseeding is ineffective, an alternate method, such as <br /> sodding, mulching, or nets/blankets, shall be used. If winter weather <br /> prevents adequate grass growth, this time limit may be relaxed at the <br /> Idiscretion of the local authority when sensitive areas would otherwise <br /> be protected. <br /> I <br /> 4-18 Volume ll—Construction Stormwater Pollution Prevention February 2005 <br />