The construction of a new bridge over River Pra along Twifo Praso – Dunkwa Road, 175m (Lot 7) is currently about 60% physical completion.
The bridge is a post-tensioned concrete box girder bridge. The superstructure (box girder) is being constructed using form traveler (i.e., balanced cantilever construction). It is supported by reinforced concrete abutments and piers sitting on concrete bored piles. The total length of the bridge is 160m, having 3spans of 45m, 70m and 45m.
The new bridge replaces the old one which was an existing Steel Truss and Concrete railway bridge which was adapted for vehicular use. The width of the old bridge did not allow for the passage of a two-directional flow of traffic at a particular time.
According to the Resident Engineer on the Project, Victor Nyantakyi Baah, completed works on the Project include the construction of 16No. reinforced concrete bored piles for piers P1 and P2, 6No. reinforced concrete bored piles for abutment A0, 2No. reinforced concrete piers and pile caps, 2No. reinforced concrete abutments and foundation and 2No. sections of post-tensioned concrete box girder (i.e., block zero). The rests are the installation of bridge bearings (8No.) and the construction of 2No. 1200mm diameter pipe culvert.
He indicated that some outstanding works to be done include the installation of expansion joint, drainage gullies, metal guardrails, abutment protections, road furniture, construction of approach roads, a total length of 1.67km on both approaches (currently ongoing), the filling/cutting to road formation level and Pavement works.