Laserfiche WebLink
WO#3 <br />Oslo Road and Oslo Road Boat Ramp Improvements <br />IRC Project No. 0381 <br />According to <br />the provided cross sections, minimal <br />earthwork is planned on the north side of the <br />road. On the <br />south side of <br />the road, the proposed <br />improvements will involve about 4 to 5 feet of <br />fill placement <br />in an existing <br />swale and 2 to 3 feet of cut for the swale on south side. <br />A wet detention pond is proposed on the south side of the road between Stations 272+40 and <br />274+70. Majority of this wet detention pond footprint is located within an existing wet ditch line. <br />The pond bottom will be excavated to elevation -5.0 feet with respect to National Geodetic <br />Vertical Datum, 1929 (NGVD). <br />The existing boat ramp will <br />be improved to a concrete ramp and new <br />wood decking access piers <br />will be constructed on both <br />sides of the ramp. <br />One fishing pier also <br />will <br />be constructed north of <br />the boat ramp. The access <br />ramps and fishing <br />piers will be supported <br />by <br />timber piles. <br />SCOPE OF STUDY <br />The geotechnical work for this project will consist of the following components: <br />Field Exploration <br />Roadway Soil Survey <br />Auger borings will be drilled at about 200 -foot centers on the south side of the <br />roadway and at about 600 -foot centers on the north side of the roadway. The borings <br />will be positioned at the edge of the existing roadway. All auger borings will be <br />drilled to a depth of 6 feet. The borings will be drilled using our truck -mounted or <br />hand -turned drilling equipment. IRC will be responsible for notifying all the <br />appropriate private property owners regarding our field exploration. <br />2. Groundwater levels will be measured in each of the boreholes upon their completion. <br />3. Temporary piezometers will be installed in 4 of the boreholes at 600 -foot intervals. <br />Water levels in the piezometers will be measured once a week for period of three <br />weeks. <br />4. Two bulk soil samples will be obtained for laboratory Limerock Bearing Ratio (LBR) <br />testing. <br />5. Muck probes will be performed in the wooded areas on the south side of the road <br />where automobile and boat trailer parking is planned to determine the presence of <br />surficial soft and/or organic soils. <br />6. Muck probes will be performed near the shoreline where the boat ramp is planned <br />and where feasible in the wet ditch line where the detention pond is planned. <br />Two <br />pavement <br />cores will be <br />obtained from the existing <br />paved section of road at the <br />west <br />end of the <br />project <br />limits. <br />8. Three, 40 feet <br />deep <br />Standard Penetration <br />test borings will be done for access docks <br />and detention <br />pond. <br />These borings will be <br />grouted upon completion. <br />F:\Engineering\Capital Projects\0381 Oslo Road Boat Ramp\Agenda's & Contracts\0381 Oslo Boat Ramp WON 3 Dankelberger 03-25-08.doc <br />