By Fridah Mbuvi, June 11, 2026
Kiambu County Governor Kimani Wamatangi is leveraging the underutilized Ndarugo Quarry deposits to support the county’s ongoing “Boresha Barabara” infrastructure programme, a strategy aimed at cutting costs while accelerating road construction across the region.
The initiative is currently being applied in the rehabilitation of the Kimbo–Matangi-ini Road, a key transport corridor linking residential, agricultural, and commercial zones within Kiambu County.
According to the county government, the direct sourcing of construction materials from Ndarugo Quarry has significantly reduced procurement costs by eliminating reliance on commercial middlemen. Officials say the use of locally available sub-base materials and aggregates has lowered the per-kilometre cost of road construction, allowing more roads to be upgraded within the same budget allocation.
The county further notes that direct control of material sourcing has improved supply reliability, ensuring uninterrupted delivery of construction inputs to active project sites.
The Kimbo–Matangi-ini Road remains one of the flagship projects under the programme, with authorities emphasizing its strategic importance to regional connectivity. The upgraded road is expected to improve transport efficiency by linking farmers, traders, and small businesses to the Thika Superhighway and broader market networks.
County engineers say the use of Ndarugo stone bases will enhance durability, reducing long-term maintenance costs and preventing recurring damage such as potholes and seasonal impassability.
The “Boresha Barabara” initiative forms part of Wamatangi’s wider infrastructure agenda, which focuses on decentralised equipment deployment and the use of locally sourced materials to expand road coverage across all 60 wards.
The programme also involves the mobilisation of county-owned graders, tippers, and rollers to multiple construction sites simultaneously, while also creating short-term employment opportunities for local youth engaged in manual construction work across Juja and surrounding areas.
