Site work and renovation of a bridge / tunnel in Horton, Michigan. Completed plans call for the renovation of a bridge / tunnel.

Removal of existing 56 feet of 12-inch diameter culvert and installation of 56 feet of 48-inch diameter poly coated CMP culvert at an unnamed tributary to the Manistee River. Remove existing 56' of 12" diameter culvert and replace with 56' of 48" diameter poly coated CMP culvert on 12 Rd at un-named tributary to the Manistee River. Section 30, Hanover Township, Wexford County. The project site is on 12 Rd at Un-named tributary to Manistee River, Hanover Township, Section 30, Wexford County, Michigan. This crossing is located just under 1 mile east of the M-37 and 12 Rd intersection and approximately 1,000' west of where 12 Rd becomes 15 Rd. The location has been closed with barricades. There is a sinkhole formed in the road, and the downstream front slope has been undermined severely. Remove existing 56' of 12" diameter CMP culvert. Placement of 56' of 48" diameter poly coated CMP culvert, at the un-named tributary. The work of this contract involves the removal of the existing culvert and placement of a new poly coated CMP culvert per the attached plans. The existing culvert is very steep. The new culvert will have the downstream invert raised and fill placed to flatten the slope of the structure. The stream downstream of the culvert will have bank rock placed in the washed out area to stabilize the slopes and flatten the stream bottom grade. The contractor will be responsible for all items of work listed in the Bid Proposal and shown in the plans, including any required dewatering. The contractor will provide a plan to control the flow of water during construction of the culvert. This dewatering plan must be approved by the Road Commission Engineer prior to any construction on this project. The cost of dewatering is to be included in the Lump Sum price of culvert replacement. Restoration will be required on all disturbed areas. This road is a seasonal road and has been closed by signage and may require additional traffic control items for these operations at no additional cost. There is a sinkhole in the road and the front slope on the downstream side is washed out and undermined as well. The road will continue to be closed until completion of the culvert installation and slope restoration. Contractor is responsible for maintaining existing signage and barricades during construction.