The road plays a primary role in trade along the Northern Corridor and is a major route for goods entering the Great Lakes region, meant that it was extremely urgent for UNRA to immediately find contractors for emergency design and build of the collapsed bridge.

The damage had been caused by erosion of the main pillars of the bridge which were constructed more than 40 years ago. The erosion had been escalated by increased volume of waters in River Malaba, following persistent heavy rains. The major task was put forward to Terrain Services Ltd who were required to act both swiftly and methodically.

The following works occurred:

• Topographical, geotechnical, hydrological surveys
• Detailed design process for piles, foundations, sub and super structures
• CFA piling to foundations
• RC construction of 2 No. abutments and 1 No. pier
• Design, manufacture, shipping, erection of 2 No. x 20m span composite steel beam/concrete deck bridge
• Demolition of existing bridge
• Relocation of river course and river protection
• Approach roads

 Terrain Services won lot 2 of two bridges that included Nyawa Bridge (Moyo District) which is 32.3 km from Moyo town along Moyo-Yumbe road. Terrain Services Ltd were requested to commence works two weeks from the date of signature and involved the following:

• Construction of 2 No. Abutments and 1 No. Pier
• Road works and pipe culverts
• Supply and installation of permanent 30m (2 No. x 15m Span) Reid Steel Composite Steel/Concrete Beam Bridge
• River training Works

Terrain Services Ltd. In conjunction with Reid Steel UK re-designed the bridge superstructures with steel composite, to provide robust structures and reduce construction time. In addition to the above-mentioned works, Terrain Services Ltd was awarded all 4 No. approach roads with associated services as an additional contract.

The project involved the following works:

• Site clearance
• Excavations and filling
• Construction of miscellaneous drainage works
• Construction of 2 No., 20m long bridges supported on 14m high abutments over River Mirumba
• Provision and installation of road furniture

The collapsed bridge that was constructed 60 years ago formed a sizeable hole in the middle, with only motorcycles, bicycle riders and pedestrians able to go through a small portion that remained on one side. In a state of emergency, the Uganda National Roads Authority required a contractor to take on the job of replacing Manafa Bridge under a design and build contract.

The project lasted 12 months and involved the following works:

• Topographical, Geotechnical, Hydrological Surveys
• Detailed design process for foundations, sub and super Structures
• Traditional foundations to rock
• RC construction of 2 No. abutments
• Design, manufacture, shipping, erection of 25m span composite steel beam/concrete deck bridge
• Demolition of existing bridge
• Relocation of river course and river Protection
• Approach roads

This turnkey design and build project included the following: -

• To design the foundations, abutments, piers and bearing shelves for the 100m span bridge crossing River Mayanja with a new road alignment on the Kyankwanzi-Ngoma road
• To create cofferdams to construct 2 No. abutments and 2 No. piers with spacing 25m + 50m + 25m
• To design, fabricate, deliver and assemble a 100m span through Truss Bridge which was launched in 2 No. 50m sections from each abutment and then joined in the center
• To cast a R.C. Deck for the roadway and walkway
• To construct approach roads with associated road furniture and river training

This project was estimated to last 24 months; however, the bridge was opened for use after only 18 months.

Terrain Services and REID Steel designed required bridges within design tolerances of the client. Designs were approved on 1st submission and the bridge structures subsequently prefabricated in Europe by REID Steel and shipped to Sudan by Terrain Services.

The bridges were erected and installed according to programme and reinforced concrete decks placed and bridges commissioned October 2009.

The bridge details are as follows: -

• Bridge 1 at Kubri Arba (168.3 km from Nimule/23.7km from Juba): Type: 18.3m Beam
• Bridge 2 at Kubri Hamsa (165.3km from Nimule/26.7km from Juba): Type: 12.2m beam
• Bridge 3 at Kubri Sita (163.7km from Nimule/28.3km from Juba): Type: 40m Truss
• Bridge 4 at Nyole (92.7km from Nimule/99.3km from Juba): Type: 40m Truss
• Bridge 5 at Kit (91km from Nimule/101km from Juba): Type: 50m Truss
• Bridge 6 at Aswa (23.4km from Nimule/168.6 from Juba): Type: 18.3m beam – 50m Truss – 18.3m Beam
• Bridge 7 at Merlin/Nimule (1.6km from Nimule/190.4km from Juba): Type: 18.3m Beam

The collapse of the main bridge, the only link to the outside communities deeply complicated the situation. Terrain Services Ltd were tasked with completing the bridge in a short time frame to allow access to these remote villages.

The rehabilitation works included the following: -

• Design and construction of 39.6m steel bridge including foundations and abutments
• Temporary bridge construction for access
• River training works
• Dredging of river channel
• Reinstatement of approach roads