Site work for a bridge / tunnel in Farmington, Maine. Working plans call for site work for a bridge / tunnel.

Shoulder width will be maintained and repair any damage from water erosion. Shoulders will be lower and graded at a slightly steeper cross slope to provide positive drainage to the ditch. If possible, the all-in slopes will be no steeper than 2:1 and the back slopes will be no steeper than 1:1. The depth of the ditch should be a minimum of 12" to 18" below the gravel base or follow the original ditch depth when constructed to maintain water flow to existing cross culverts and for water cutouts. The width of the bottom of the ditch will be 18" wide between the front slope and back slope and v-ditch should be avoided. No gravel of sod berm or windrow will be left in between the road and the ditch slope. The county will give the contractor places for ditch spoils. All culverts, geotextiles, and erosion control materials will be supplied by the County; however the contractor will pick up the material at County Way campus. Avoid any inconveniences to residents without prior notice given to them. The contractor will use proper warning signs in and around the work area and only close one lane at a time during construction. All unstable ditches and slopes will be properly protected against erosion according to best management practices and the contractor must be certified in that practice. Any exposed soil shall be stabilized with hay mulch at the end of the workday. All work will be performed under the direction of the Road Supervisor. All culverts or obstructions contractor will mark before work begins. The contractor will call Dig Safe before any work begins and provide the county with the dig safe permit number. A machine must have a hydraulic ditching bucket and not be any larger than a 23-ton excavator and no smaller than an 18-ton Excavator. The contractor shall avoid sharp turns on the hot top and avoid damage to the surface.