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The seed mix shown in Table 4.5 is a recommended low-growing, <br />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 />bentgrass (agrostis sp.) should be emphasized in wet-area seed mixes. <br />Apply this mixture at a rate of 60 pounds per acre. <br />Table 4.5 <br />Wet Area Seed Mix* <br />% Wei ht % Puri % Germination <br />Tall or meadow fescue 60-70 98 90 <br />Festuca arundinacea or <br />Festuca elatio�� <br />Seaside/Creeping bentgrass 10-15 98 85 <br />A rostis alu.rtr-is <br />Meadow foxtail 10-15 90 80 <br />Ale ocuf-u,c raten,ris <br />Alsike clover 1-6 98 90 <br />Trifolium Irybridum <br />Redtop bentgrass 1-6 92 85 <br />A ostis alba <br />* Modified Briargr•een, 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 />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 />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 />Redtop or Oregon bentgrass <br />Agrostis alba or Agi.ost� <br />Red fescue <br />Festuca rubra <br />White dutch clover <br />Table 4.6 <br />Meadow Seed Mix <br />% We: <br />20 <br />70 <br />� <br />% Purity % Germination <br />92 85 <br />98 90 <br />98 90 <br />Maintenance • 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 />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 />discretion of the local authority when sensitive areas would otherwise <br />be protected. <br />4-18 Volume ll — Construction Stormwater Pollution Prevention February 2005 <br />