Boat Ramp and Dock Replacement Sandy Lake Recreation Area

The contractor shall supply and provide all equipment, labor, supervision, and materials necessary to remove the existing south boat launch ramp and wooden dock and install a new boat launch ramp and dock in the same location at the Sandy Lake Recreation Area. The new dock shall be a 30-foot-long by 8-foot-wide aluminum floating dock to be located on the west side of the ramp. The U.S. Army Corps of Engineers Sandy Lake Dam & Recreation Area is located 12 miles north of McGregor, Minnesota in Aitkin County, MN. All work shall conform to local, county, and State laws and codes. A site visit is recommended prior to submitting a quote. :: An eight-foot wide by eighty-foot long aluminum floating service dock exists on the east side of the south boat ramp. The contractor shall supply all equipment, labor, and materials necessary to temporarily remove the 3-inch aluminum dock poles that secure the existing floating dock. The dock shall be moved out of the way to prevent it from being damaged during construction of the new ramp and then replaced in the original location after the ramp is finished.The contractor shall provide a new all aluminum 8-foot-wide by 32-foot-long floating dock to be installed, replacing the current wooden floating service dock found on the west side of the boat launch. The Contractor shall be responsible for removal and disposal of the existing 8 wide x 32 long wooden floating dock with access ramp. The replacement dock shall have an extruded aluminum frame that is 5 tall by 2 3/8 wide, with track system for attaching accessories, such as bumpers. The aluminum dock shall be supported by a minimum 12-inch foam filled polystyrene float system with a nominal wall thickness of .150, resistant to gas, oil, and other chemicals. The dock shall have a minimum weight capacity of 5,120 lbs. per 16-foot section. The dock shall be held in place by aluminum guide poles that have auger bit ends for easy installation and removal. The dock shall have 8 boat tie-up cleats, corner and edge bumpers, and an aluminum skid proof decking with an 8-foot-wide by 9-foot-long aluminum shore-end ramp. The contractor shall supply all equipment, labor and materials necessary to remove the approximately 16 foot by 40 foot concrete apron .The contractor shall saw cut a straight line at the junction of the asphalt and concrete apron so there is a smooth transition between the new poured in place apron and the asphalt parking lot. All underwater ramp planks shall be removed. There are approximately 12 one-foot by 6-inch ramp planks under the water. These planks extend out in the water approximately 25 feet. The water depth is approximately 4 feet deep at the end planks. The contractor shall remove the necessary materials including all silt, rock or materials that can't be used for supporting the new concrete ramp planks to include reshaping and filling scour holes to allow for the placement of a layer of type V Geo Textile under a 12 inch thick layer of compacted 2 to 2.5 inch crushed quarry rock. All materials removed from the old ramp shall be disposed of in an off-site location in accordance with all local, County and State of Minnesota disposal codes. The precast ramp planks shall be 8 inches thick by 4 feet wide by 16 feet long with a one-inch deep V groove (30 degree) finish. The planks shall have lifting hooks with two layers of epoxy coated # 4 rebar reinforcement one foot on center in each plank. The concrete compressive strength shall be a minimum 5,000 psi. The planks shall have a tongue and groove connection joint or recessed connection loops to keep the ramp planks fitting snug together. There shall not be any gaps between the individual planks and all the planks shall be fastened together so that they are one unit and can't separate once installed. The last ramp plank shall be fastened to the cast-in-place concrete apron according to the manufacturer's recommendations. The new planks shall extend approximately 30 feet into the water. : The Contractor shall place a 4 foot border of Class II Crushed Granite Aggregate with fines on each side of the planks from the water's edge at elevation 1216.31 NGVD all the way to the last plank so that boat trailer wheels don't fall off the edge of the ramp planks. An 8-foot border by 2-foot thick blanket of Class III Granite rip rap shall extend out beyond the last plank the full width to protect the last plank from being undermined by boats power loading. The contractor shall place the concrete over a thoroughly compacted subgrade, layer of geotextile fabric, 6-inch thick layer of compacted aggregate (2.5 minus) subbase and a 6-inch layer of compacted aggregate (.75 minus) base course. The contractor shall place the concrete over a thoroughly compacted subgrade, layer of geotextile fabric, 6-inch thick layer of compacted aggregate (2.5 minus) subbase and a 6-inch layer of compacted aggregate (.75 minus) base course. The contractor shall pour approximately a 16-foot wide by 40-foot long by 8-inch-thick, cast-in-place concrete ramp. The concrete ramp shall have a 24-inch-deep cut-off wall on both sides and at the bottom edge to keep the concrete ramp from being undermined by water and to strengthen the edges. The ramp shall have epoxy coated number 4 rebar, twelve inches on center in both directions for reinforcement, with a one-inch deep V groove (30 degree) finish. The bottom edge shall be designed according to the manufacturer's recommendations for attaching the pre-cast planks. The contractor shall pour a new 18-inch-wide curb like the existing curb on the east side of the cast-in-place apron of the south boat ramp. The Contractor shall be responsible for leaving the area in the same or better than preconstruction conditions. All materials (rocks, sod, dirt) not used shall be removed and disposed off-site. Disposal of debris shall meet all local, County and State disposal codes.