Perkiomen Creek Tributary Floodplain Restoration

1. Mobilize equipment, personnel and materials to the project site as necessary tomconstruct the project improvements. Includes all associated travel, fuel, rental, and other associated fees and demobilization upon project completion. This item covers all start up and shut down costs, and will be paid in 2 installments: 60% on the first Application for Payment after mobilization occurs; and 40% on the final Application for Payment. (Lump Sum) 2. Furnish, install, and maintain all temporary erosion and sedimentation control measures as indicated for the duration of the project. Includes but is not limited to: construction entrances w/ curb protection, erosion control blanket in areas of 3:1 or steeper slopes, cofferdam, by-pass pumping, filter bag, rock filter, filter sock, temporary stream crossings, and stockpiling. All temporary erosion control measures shall be removed upon completion of work. Also includes final stabilization of all disturbed areas. (Lump Sum) 3. Perform restoration earthwork, as indicated. Remove and dispose of all excess materials which are excavated or removed as part of the restoration earthwork. Includes: excavating evidenced legacy sediments and removal from site; fill existing incised channel; grading proposed channel system; fill bank installation, and temporary stabilization matting installation. (Lump Sum) 4. Furnish and install log sills, as indicated. Includes: harvesting suitable log sill material onsite and storage of material onsite until needed for installation; excavation of trench suitable for log sill installation; installation of log sills to provide grade control and mitigate the potential for channel incision and floodplain degradation resulting from flooding; choking voids in log sills in order to prevent piping and instability; and backfilling log sills to finished grade. (Lump Sum) 5. Contractor to install woody debris, as indicated. Includes: harvesting and storing materials onsite until needed for installation; over-excavation areas of floodplain to accommodate woody debris placement; install woody debris and backfill. (Lump Sum) 6. Furnish and install Rock Underlayment, as indicated. Includes: over-excavation of areas of floodplain to accommodate riprap placement; furnishing and installing riprap;choking voids with gravel material harvested onsite; furnishing and installing in-place 6" suitable growing medium; furnishing and installing erosion control blanketing to ensure stabilization; and furnishing and installing seed mixture and plants. (Lump Sum) 7. Furnish and install landscaping and plantings, as indicated. Includes: Seeding disturbed areas prior to installing stabilization matting; installation of plant materials, and final stabilization of floodplain disturbance area. (Lump Sum)

Division 31 -	Earthwork, Erosion and Sedimentation Controls.
Division 33 -	Utilities, Storm Drainage Utilities, Ponds and Reservoirs.