The Norwegian Public Roads Administration - NPRA -, Region Mid Norway, Nord-Trøndelag, shall construct a new County Road 17. The Årgård Bridge with adjacent road. A new bridge shall be constructed downstream the old bridge and replace the old Årgård Bridge which shall be demolished and removed. Furthermore, construction of more than 400 m new adjacent road that shall be connected to the existing County Road 17.
The new Årgård Bridge shall be 81 metres long divided between 3 spans (24 -33 – 24 metres). The bridge is planned as a girder bridge in concrete cast on site and with prestressed steel. The width of the bridge between the railings is 9 metres and the total width of the bridge is 10 metres. The laying of foundations shall be done with 2 drilled steel pipe pilings in each axes, a total of 8 piles. The piles shall be casted out in total length. Furthermore, the abutments and the pillars shall be erosion protected. Since there is registered quick clay at the north side of the Øster River, the north side of the river course must be erosion protected from the existing bridge and forward to the end of the section.
Construction of adjacent road includes more than 260 metres at the south side and more than 140 metres on the north side of new Årgård Bridge. New road shall be connected to the existing County Road 17. The contract also includes construction of 140 metres municipal road as well as exit road to private road.
Due to poor area stability towards the Øster River/Årgård River, the contract will also include relief of the terrain at the north west side of the Øster River. Furthermore, the contract includes alteration of municipal water pipe as well as demolition of 4 houses.