National Road Construction Program

This case study focuses on the National Road Construction Program, a multi-site infrastructure initiative delivered by The Cornerstone Group for the Government of The Gambie. The program is a strategic investment in the nation’s “feeder road” network, designed to unlock economic potential in rural and agricultural regions.

Strengthening Rural Connectivity, Trade Access, and National Mobility Infrastructure

Client name

Gouvernement de la Gambie

Project Value

USD $20 Million.

Location

Plusieurs régions de la Gambie

Sector

Transport Infrastructure / Civil Engineering

Project Context & Strategic Objectives

For The Gambia, rural roads (feeder roads) are the arteries of the agricultural economy. Prior to this program, many rural communities faced “seasonal isolation” during the rainy season. This $20 million program was launched to achieve several critical national goals:

Market Integration: Connecting production zones in the interior directly to regional markets and the Trans-Gambia Highway.
All-Season Mobility: Ensuring that healthcare, education, and emergency services are accessible year-round, regardless of weather conditions.
Logistics Efficiency: Reducing the “wear and tear” on vehicles and lowering the cost of transporting agricultural produce to urban centers.

Detailed Scope of Works

The program involved a complex coordination of multiple sites, requiring Cornerstone to manage logistics across dispersed rural zones:

Feeder Road Rehabilitation & Construction:

Sub-grade & Base Preparation: Extensive earthworks involving grading and compaction to create a stable foundation capable of supporting heavy transport vehicles.
Surface Treatment: Application of durable surfacing designed to withstand the high-impact rain cycles of West Africa.

Drainage and Erosion Engineering:

Culvert Installation: Strategic placement of reinforced concrete culverts to manage water runoff and prevent road washouts.
Side Drains: Construction of lined and unlined drainage channels to direct water away from the road structure, preserving the integrity of the pavement.

Ancillary Civil Works:

Road Safety Features: Installation of essential signage and basic markings to improve visibility and safety for rural commuters.
Access Management: Ensuring safe interfaces between the new feeder roads and existing community footpaths and dwellings.

Technical Highlights

Cornerstone applied its Turnkey (Design-Build) and Gestion de chantier expertise to ensure consistency across all sites:

Standardized Quality Control: Implementing uniform material testing and construction methodologies to ensure that a road in the Upper River Region met the same high standards as one in the West Coast Region.
Weather-Adaptive Scheduling: Sequencing the heavy earthworks during the dry season to avoid the structural risks associated with building on saturated soils.
Logistics Optimization: Managing a complex supply chain for materials (laterite, gravel, cement) in remote areas where local availability can be a constraint.

Environmental, Social & Economic Impact (ESG)

Economic Impact: Directly lowers the cost of doing business for thousands of smallholder farmers and transport operators.
Social Impact: Significantly improves “Last Mile” access to essential services, reducing the time required to reach regional hospitals and schools.
Environmental Impact: Properly engineered drainage systems reduce soil erosion and flooding in surrounding agricultural lands, protecting the local ecosystem.

Key Stakeholders

Government of The Gambia: Project owner and primary funding body.
The Cornerstone Group: Prime contractor responsible for site execution, safety, and quality assurance.
Ministry of Transport, Works and Infrastructure (MoTWI): Technical oversight and alignment with the National Development Plan.

Critical Success Factors

Community Engagement: Early coordination with local village authorities to manage land use and right-of-way during construction.
Safety First: Implementation of international safety protocols to protect both the workforce and local villagers in active construction zones.
Scalable Operations: The ability to mobilize multiple teams simultaneously across different regions of the country.