1335, Kwame Nkrumah Ave.
Maputo • Mozambique
telephone icon+258 21 414 506/7/8
Items Count: 137
Tuesday, 04 February 2014 00:24

Feasibility Study, Detailed Design and Tender Documents for the Rehabilitation of Road N6 between Beira and Machipanda Road, including Bridge Rehabilitation (273 km)


Manica and Sofala Provinces



Direcção de Estradas Nacionais (DEN), Administração Nacional de Estradas (ANE)


Client Address

Avenida de Moçambique No. 1225
Maputo, Mozambique








Associated Consultants



CPG Expertise

Roads, Bridges, Pavement, Contracts and Traffic Engineers, Transport Economist, Hydrologist, Materials Technicians, Surveyors, CAD Technicians, Project Manager



48 staff-months



US$1.0 Million (ADB Funding)


Months of work by Associated Consultants



Senior Staff Roles

Brian Warren – Project Manager, Paul Wootton – Team Leader



In 1985/86 a Study was carried out to investigate the needs for rehabilitation and economic feasibility after the route had been restricted due to political conditions, and deterioration occurred.  The study was updated and in 1988 a decision was made to implement detailed investigations and final engineering design, including an update to economic feasibility, with a view to seeking donor finance for the necessary rehabilitation works.

Economic Evaluation – The World Bank Highway Design Model (HDM III) was used to produce the normal economic indicators for the project.  The evaluation was carried out from a baseline related to the end of the current emergency repair measures funded by SIDA and the EEC.

Road Rehabilitation – The engineering investigations for evaluation of the road rehabilitation requirements comprised the following – Pavement Visual Condition Survey; DCP (Dynamic Cone Penetrometer) Survey; Trial Pit Survey; Roughness Survey; Axle Weight Survey; Deflections.  A series of sections earmarked for “resheeting” totalling 22.4 km between Lamego (85.5 km) and Junction EN1 (133.5 km), were selected or to achieve satisfactory serviceability for the next 20 years.  CPG assisted Kjessler and Mannerstrale AB (KM) in the detailed review and economic assessment.

Bridge Rehabilitation – The project included an assessment of all bridges and culverts for condition and structural adequacy.  Many of the bridges, showed signs of distress.  Drawings were, in general, not available for these and their adequacy was assessed using experience and judgement and load tests.  Púnguè Crossing – The route traverses the estuary of the Púnguè River (catchment area 26 200 sq.m.) across a flood plain 15km wide.  Bridges of total length 800m are provided along the flood plain, the main structures comprising three viaducts of length 125, 125, 200m and a central bridge of total length 224m.

The road embankment is subject to annual flooding of depth up to 1.5 metres for several kilometres width on either side of the central “bridged” section.  The project required a hydrological study to be carried out with the object of optimising additional embankment height and new bridge openings to achieve a flood inundation return period of 3 to 4 years to a maximum depth of 200 cm.  Embankment and bridge erosion protection works are to be provided to prevent excessive maintenance rehabilitation works following flood inundation and subsidence.  The construction of the embankment fill, pavement and surfacing was designed to sustain saturation for extensive periods.



Phase I – Investigations, Surveys, Evaluations, Preliminary Engineering Design and Economic Feasibility; Phase II – Detailed Engineering Design, Preparation of Contract Documents

Additional Info

  • Country: Mozambique
  • Service Area: Road, Rail & Air Transport

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