H Young & Co. (E.A.) Ltd

Client DIRECTOR GENERAL, KENYA URBAN ROADS AUTHORITY BARABARA PLAZA-JKIA, OFF AIRPORT SOUTH ROAD ALONG MAZAO ROAD OPPOSITE AVIATION HOUSE P.O BOX 41727-00100 NAIROBI, KENYA  
Completion date DECEMBER 2019
Project Value KES 2,097,520,695.00 (US$ 20,632,440.22)  
Construction of 4.2 km dual carriageway and service roads linking two main roads to bitumen standard 150mm DBM and 150mm AC type 1 as detailed below:-
  • Relocation of services (Water and sewerage)
  • Construction of earthworks and 300mm thick Improved Subgrade
  • Laying of 175mm thick cement improved GCS sub-base layer
  • Laying of 150mm thick DBM base layer
  • Laying of 50mm and 25mm thick asphalt concrete type I surfacing to carriageway and footpath respectively.
  • Construction of pipe culverts, structures, and other drainage works
  • Provision of drainage and soil erosion protection works (scour checks, stone pitching, grassing to slopes)
  • Oil pipeline protection Works 560m3.

Major quantities

  • Earthworks – 386,000m3
  • Rock fill – 15,000m3
  • Concrete Works incl. U drains, sewer works – 2,500 m3
  • Major Structures incl. Box culverts, Retaining wall and Bridges (Southern Bypass Bridge 32M span) – 6,575m3, reinforcement bars 650 ton) – grouted stone pitching – 3500m2 and gabions 2000m3.
  • Culverts – 450,600& 900mm Dia (precast with concrete surround) – 1,300 LM
  • GCS Subbase 150mm – 14,000m3
  • DBM Base 100mm – 9,400m3
  • Asphalt Concrete – 4,700m3
  • Kenya Pipeline oil Pipes (protection works of roads crossings) – 3 Locations

Bridge Structures

  • Overpass Bridge: 2 Span; 60 Meters comprising of Piles, Piers, Aburtments, precast beams and bridge deck. Concrete Volume 1,200m3.
  • Abutment at River Bridge: 17 meters high comprising Aburtments, Couterfort walls, piers and foundation: concrete Volume 920m3
  • Retaining wall 210 meters long by 300mm thick involving excavation in hardrock: Concrete Volume 2,300m3. Rock breaking 1,920m3
  • Overpass Box Frame 1 span: Concrete Volume 550m3
  • 2 Nos. Box culverts 60 m span each concrete Volume 1,320m3.