LOCATION                                Republic of Uganda

CLIENT                                      Ministry of works, transportation & communications

FIRM’S RESPONSIBILITIES       Feasibility & Engineering Study, Detailed Design, Tender Documents & Construction Supervision.

The proposed road studies are part of the Preferential Trade Area (PTA) road transport connecting Uganda Road network to that of the neighboring countries and have a total length of 180 kms.

• The Katunguru- Kasese -Fort Portal Road is of 108 kms length and forms a section of the Trans-African Highway linking Mombasa in Kenya to Lagos in Nigeria. The first 31 kms to Kasese the character of the road is almost flat, with gentle horizontal and vertical geometry for about 20 kms.  It traverses the Queen Elizabeth National Park, the terrain around this part of the road is open and flat.

In this area, the pavement is badly deteriorated, the pavement surface appears to be aon open textured macadam.

As the road approaches Fort Portal it follows the contours and begins to cross them.

From Port Fortal boundary the condition of the road is far worse.

• The Fort Portal-Bundibugyo Road is of 70 kms length. For the majority of its length, this road crosses mountaineous terrain with steep slopes and difficult horizontal curves.  There is a clear need for a total hydrological study and a comprehensive drainage design.  The road passes by the dense Semiliki Forest Reserve.  The land adjacent to the road appears to be potentially productive.

The study included a preliminary engineering study for both parts of the road.  The different treatments were throughly analysed for the proposed alignments according to the estimated quantities and costs.

By the approval of that feasibility study detailed design and tender documents were done for both sections of the road.

Environmental Impact Assessment

The environmental effects of the road improvements had been considered as a whole and within the ambit of Uganda’s development plans.  Because the improvements were planned to occur within the existing corridor, and almost completely on the existing alignment, many of the potential negative effects of road development had been avoided.  Consequently, the economic benefits which were expected to follow the road improvements such as the increased agricultural industrial, forestry and tourist activities have been achieved.

 

LOCATION                                Sierra Leone

CLIENT                                      Government of Sierra Leone

FIRM’S RESPONSIBILITIES       Feasibility Study & Engineering Study & Tender Documents.

The road lies in the north west area in Sierra Leone with a length of 120 km.  The project road forms part of the Trans West African Highway. It forms part of the road network linking the Republic of guinea to the North, Sierra Leone and Liberia to the South East.

SCOPE OF WORK

Feasibility study including:-

• Transportation and traffic study.
• Hydraulical, Geological study.
• Topographical study.
• Detailed Field Survey including:

– Horizontal traverse to locate the selected alignment using permanent beacons at 500 m intervals.

– Level traverse every 50m and over the permanent marks .

– Cross sections every 100m or at such closer intervals where required according to terrain.

– Detailed surveys were carried out on major intersections and sites of major drainage structures.

• Sub-Surface soils and materials investigations:

– All the borrow areas identified in the Preliminary Design have been visited and trial pits excavated on a grid pattern at 50m.

– The trial pits along the centre line of the proposed road have been excavated at 1.5km intervals.

– The necessary foundation investigations for the structures were carried out.

– The Government permitted to make use of the Ministry of Work’s Soils Laboratory equipment and staff for the purpose of the samples testing.

– Preparation of the Soils Report.

• Design of Road Pavement:

– Both the traffic forecasts and traffic loading data contained in the Feasibility Study Report were used and the data obtained in the course of the detailed design of the Waterloo-Masiaka Road taking the likely increase in axle loads.

– To produce a most economic pavement the AASHTO “Interim Guide for the design of Pavement Structures” and the TRRL ROAD NOTE 31 were adopted “A GUIDE to the Structural Design of Bitumen Surfaced Roads in Tropical and Sub-Tropical Countries”.

Using 5cm thick surfacing to produce a pavement of minimum maintenance.

• Design of Bridges:

There are two major bridges to be designed one of 60m in length over the Bankaska river and the other is of 18m in length over Tonko river, both bridges are cast-in-situ reinforced concrete frame.

• Tender Documents and Cost Estimates:

–    The measurement of quantities and preparations of the Bill of Quantities for all of the works.

–    Preparation of the Specifications for all works other than the road works.

–    Preparation of cost estimates .

 

LOCATION                                Republic of Yemen

CLIENT                                      Ministry of Construction, Housing & Urban Planning, General Corporation of Roads & Bridges

FIRM’S RESPONSIBILITIES       Design Review, Tender Documents & Construction Supervision.

The purpose of this road project is to link Madinat Al Sharq and Al Dalil, two important towns and intermediate villages of the Republic of Yemen. The actual project is only concerned by Madinat Al Sharq Suk Talut Section 42 km.  The existing route comprises a series of disconnected tracks 3-5 m wide, capable of passing only 4 wheel drive light vehicles. The terrain is mountainous for over 80% of the length. Land use along the route is mainly agricultural .The primary objectives of the project are:

1. To stimulate socio-economic activity in a geographical area of about 4000 sq. covering a large number of villages and towns;
2. to provide a more direct and shorter connection between the major port Hodeidah in the West to the South Central part of the country; and
3. to improve inter-district communication.

In general, our firm is responsible for the following :

• All activities necessary to control and supervise the works, in accordance with the rules and regulations.
• the sound implementation of the works, in terms of quality as well as quantity, by the contractors in accordance with the specifications stipulated in their contracts.
• Establish and verify all necessary paper works as well as the invoice related to the contractors.
• The geotechnical supervision and control
• the surveying supervision and control
• the establishment of a road maintenance program
• On-the job training program and technical knowledge.

The aim is to ensure high level implementation of the project, within the allocated budget.

LOCATION                                Republic of Benin

CLIENT                                      Ministry of Public Works & Transports

FIRM’S RESPONSIBILITIES       Actualization of Techno-Economic Study, Tender Documents, Evaluation & Selection of Contractors & Environmental Impact Assessment.

This project is very important to Benin which will connect all the northern countries of Benin to the ocean like Burkina Fasso, Niger and Mali. The total length of the road is 102 km consisting of two mountainous sections and several flat areas which can be divided as follows:

• One mountainous section, total length of                  25 km
• Second mountainous section, total length of             15 km
• Last section, total length of                                        62 km

The road can be divided into two parts :

• Natitingou-Tanguiéta                                                  50 km
• Tanguiéta-Porga                                                          52 km

The project also included the design, evaluation of 17 road-way R.C and steel bridges along the road of different systems and spans as following:-

• Construction of 7 reinforced concrete bridges of total length 319 m, 3 of which between Natitingou – Tanguieta; the remaining 7 bridges between Tanguieta – Porga.
• Repairing and rehabilitation of 10 bridges constructed on 1987, of total length 320 Km, where  7 from R.C of 247 m between Natitingou – Tanguieta ; and 3  steel bridges of length 30 , 21 and 22 m respectively.

Scope of work

• Actualization of techno-economic study
• Straightening study which consists of :
• Topographical study
• Geotechnical study
• Hydrological study
• Geometrical study
• Security Signals
• Culverts
• Preparation of tender documents
• Evaluation and selection of contractors
• Environmental Impact Assessment