Moving a wind turbine from Mombasa to Kiambu

A wind-turbine blade does not fit on the road. That single fact reorganises a renewable-energy project's civil scope, and it is the part developers underestimate when they price a site.

On the AMEA Power / Aperture Green Wind Power Project (50 MW), our commission is the transport feasibility study and rural-road design from the Port of Mombasa to the site in Kiambu County. The engineering question is not only the new rural road — it is the whole corridor: which existing roads can carry the load, which junctions need temporary widening, which culverts need checking, and which authority I must apply to at each stage.

Jurisdiction first

In Kenya the first question on any route is who owns the road. The Kenya Roads Act, 2007 divides jurisdiction between the Kenya National Highways Authority (KeNHA) for trunk roads, the Kenya Rural Roads Authority (KeRRA) for rural classified roads, the Kenya Urban Roads Authority (KURA) for urban routes, and counties for unclassified roads. The owning authority sets the design standards and issues the abnormal-load permit. Get the jurisdiction map wrong and the programme stalls at the first weighbridge.

The environmental clearance runs in parallel

Where the corridor touches riparian land, a forest reserve, or another listed feature, a National Environmental Management Authority (NEMA) assessment has to be in place before construction. I plan that clearance on the same timeline as the route design, not after it — the findings can move the road.

The discipline that makes this work is ordinary civil engineering held to a logistics deadline: geometric design to KeNHA standards, honest swept-path analysis for the longest component, and a permit schedule that names every authority on the corridor. The turbine arrives when the paperwork has already cleared the road.