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WO# 3 Oslo Road and Oslo Road Boat Ramp Improvements IRC Project No. 0381 According to the provided cross sections , minimal earthwork is planned on the north side of the road . On the south side of the road , the proposed improvements will involve about 4 to 5 feet of fill placement in an existing swale and 2 to 3 feet of cut for the swale on south side . A wet detention pond is proposed on the south side of the road between Stations 272 +40 and 274+70. Majority of this wet detention pond footprint is located within an existing wet ditch line . The pond bottom will be excavated to elevation -5. 0 feet with respect to National Geodetic Vertical Datum , 1929 (NGVD) . The existing boat ramp will be improved to a concrete ramp and new wood decking access piers will be constructed on both sides of the ramp. One fishing pier also will be constructed north of the boat ramp. The access ramps and fishing piers will be supported by timber piles . SCOPE OF STUDY The geotechnical work for this project will consist of the following components: Field Exploration Roadway Soil Survey 1 . Auger borings will be drilled at about 200-foot centers on the south side of the roadway and at about 600-foot centers on the north side of the roadway . The borings will be positioned at the edge of the existing roadway. All auger borings will be drilled to a depth of 6 feet . The borings will be drilled using our truck-mounted or hand-turned drilling equipment. IRC will be responsible for notifying all the appropriate private property owners regarding our field exploration . 2. Groundwater levels will be measured in each of the boreholes upon their completion . 3. Temporary piezometers will be installed in 4 of the boreholes at 600-foot intervals . Water levels in the piezometers will be measured once a week for period of three weeks . 4 . Two bulk soil samples will be obtained for laboratory Limerock Bearing Ratio (LBR) testing . 5 . Muck probes will be performed in the wooded areas on the south side of the road where automobile and boat trailer parking is planned to determine the presence of surficial soft and/or organic soils . 6. Muck probes will be performed near the shoreline where the boat ramp is planned and where feasible in the wet ditch line where the detention pond is planned . 7 . Two pavement cores will be obtained from the existing paved section of road at the west end of the project limits . 8 . Three, 40 feet deep Standard Penetration test borings will be done for access docks and detention pond . These borings will be grouted upon completion . F:\Engineering\Capital Projects\0381 Oslo Road Boat Ramp\Agenda's & Contracts\0381 Oslo Boat Ramp WON 3 Dankelberger 03-25-08.doc