Highways, urban paved roads, bridges, box culverts and major storm drainage
Green Ngoria’s road construction division delivers full-scope civil infrastructure: from initial site clearing and mass earthworks through sub-base stabilization, asphaltic concrete paving, to structural bridges and drainage.
We deploy complete paving trains: heavy vibratory compaction rollers, motor graders, asphalt pavers, pneumatic tired rollers, and bitumen distributors.
Our civil engineers construct heavy hydraulic structures: reinforced concrete bridges, single and multi-cell box culverts, masonry lined drains, and flood mitigation channels built to withstand equatorial rainfall.
- Pavement Types
- Asphaltic Concrete (Surface Dressing, Overlays & Bitumen)
- Hydraulic Structures
- Bridges & Culverts (Multi-Cell Reinforced Box Culverts)
- Machinery Fleet
- Full Paving Train (Graders, Pavers & Vibratory Rollers)
- Compliance Code
- KeRRA / KeNHA / BS (Standard Road Design Manuals)
Road Construction & Civil Infrastructure — Technical Portfolio
Authentic high-resolution documentation from Green Ngoria operations, field sites, and technical delivery across East Africa. Click any photo to zoom in up to 2.5x with full pixel clarity.
Sub-Base Compaction
Compaction of sub-base ahead of surfacing with heavy roller.
Asphalt Concrete Laying
Asphaltic concrete placement and surface dressing operations.
Highway Earthworks
Earthworks, cut-and-fill, and road grading operations.
County Paving Train
Paving train operation on county highway development project.
Drainage Culverts & Channels
Masonry drainage channels, bridges and box culverts for flood containment.
Technical Scope & Certified Deliverables
Pavement & Surfacing Scope
- Dense Bitumen Macadam (DBM) & Asphaltic ConcreteBS 594 / Superpave
Hot-mix asphalt laid and compacted to 98% Marshall density for heavy axle traffic loads.
- Soil Stabilization & Base ConstructionAASHTO T180
Cement-improved base course delivering high resilient modulus and moisture resistance.
- Drainage & Hydraulic StructuresEurocode 2 / KeNHA Specs
Hydraulically sized concrete box culverts and masonry side drains preventing road erosion.
Scope of Work — Official Company Profile
- Site clearance, mass cut-and-fill, and formation grading
- Sub-base and base formation using natural gravel and crushed stone
- Lime and cement soil stabilization for expansive clays
- Asphaltic concrete (AC) surfacing, dense bitumen macadam, and overlays
- Bituminous surface dressing (single and double seal chip sealing)
- Reinforced concrete bridges, abutments, and box culverts
- Masonry storm drainage, scour checks, and gabion riverbank protection
- Road furniture: kerbing, guardrails, thermo-plastic marking, and signage
Phase-by-Phase Execution Pathway
Topographical Survey & Alignment Design
Survey alignment coordinates, establish culvert invert levels, and sample subgrade soils.
- Topographical Survey Map
- Soil CBR Test Logs
Earthworks & Drainage Structures
Execute mass cut-and-fill, excavate roadside ditches, and cast reinforced concrete culverts.
- Compaction Test Sheets
- Culvert Concrete Cube Tests
Pavement Layer Laying & Compaction
Place crushed stone base, apply prime coat, and pave hot asphaltic concrete wearing course.
- Asphalt Marshall Test Logs
- Pavement Smoothness IRI Log
Road Furniture & Commissioning
Install guardrails, apply thermoplastic road markings, erect road signs, and open to traffic.
- Final As-Built Alignment
- Defects Liability Dossier
Design Criteria & Technical Parameters
| Parameter / Specification | Standard Design Criteria | Application & Engineering Notes |
|---|---|---|
| Sub-Base California Bearing Ratio (CBR) | CBR ≥ 30% at 95% MDD (BS-Heavy) | Ensures structural load transfer for heavy trucks |
| Asphalt Paving Temperature | 140°C – 160°C at laydown | Compacted before temperature drops below 100°C |
| Culvert Concrete Characteristic Strength | C30/37 (30 MPa at 28 days) | Waterproof concrete resistant to river scour |
Standing Quality & EHS Commitments
- Health, Safety & Environment
- Environment, Health and Safety is given absolute priority in all projects the company undertakes, adhering strictly to NEMA EMCA Cap 387, OSHA 2007, and environmental mining regulations.
- Independent Quality Control
- Recognised quality-control institutions and accredited materials consultants are contracted to perform batch testing that verifies high product quality on every site.
- Regional Delivery Footprint
- Green Ngoria operates across Kenya, Tanzania, Uganda, Rwanda, Burundi, with corporate headquarters at Tatu City, Kijani Ridge, Nairobi.
Frequently Answered Questions
Does Green Ngoria undertake private mine haul road construction?
Yes. We design and construct heavy-duty haul roads engineered specifically for 60-tonne mining dump trucks and articulated loaders.
- Gold Mining & Mineral ExtractionMining Operations
- Gemstone Mining & Mineral PropertiesMining Operations
- Building Works & InfrastructureConstruction
- Renovation, Restoration & PaintingConstruction
- Water Supply, Reticulation & Civil StorageCivil Works
- Mechanical Engineering & Structural ErectionEngineering
- Electrical Engineering & InstrumentationEngineering
- Energy, Petroleum & Depot InfrastructureImportation & Supply
- Timber Importation & Heavy Wood ProductsImportation & Supply
- General Supplies & Corporate ProcurementImportation & Supply
Discuss a Roads Contract
Reach our customer care on +254 704 160 431 or email customercare@greenngoria.com — or send the details through the request for quotation form and our engineering team will respond with a full proposal.
Customer care & enquiries
Director lines & emails: Leadership Profiles →
Tatu City, Kijani Ridge, Nairobi, Kenya