Installation of a Bioswale At Parker Street Drainage Basin

Base Bid #1 (Basin #1) The project involves removal and disposal of the existing concrete low flow channel, 2,800 SF of tilling of soil and placement of 2" of topsoil, furnish and install 80 CY of bioretention soil layer, furnish and install 4,300 SF of biodegradable coconut erosion mat, furnish and install 125 SF of rip rap, furnish and install a variety of plants consisting of 8 trees, 133 shrubs in 3 gallon pots, 99 grass plugs available in 50 cell flats, 1,572 perennials available in 32 cell flats, and all labor, material and equipment for a complete project.. Alternate Bid #1 (Basin #2) - The project involves removal and disposal of the existing concrete low flow channel, 18,000 SF of tilling of soil and placement of 2" of topsoil, furnish and install 330 CY of bioretention soil layer, furnish and install 24,000 SF of biodegradable coconut erosion mat, furnish and install 125 SF of rip rap, furnish and install a variety of plants consisting of 18 trees, 654 shrubs in 3 gallon pots, 582 grass plugs available in 50 cell flats, 2,776 perennials available in 32 cell flats, retrofit of existing E inlet overflow structure and all labor, material and equipment for a complete project.. Alternate Bid #2 (Basin #3)The project involves removal and disposal of the existing concrete low flow channel, 12,000 SF of tilling of soil and placement of 2-inches of topsoil, furnish and install 300 CY of bioretention soil layer, furnish and install 17,300 SF of biodegradable coconut erosion mat, furnish and install a variety of plants consisting of 10 trees, 264 shrubs in 3 gallon pots, 99 grass plugs available in 50 cell flats, 1,640 perennials available in 32 cell flats.