Manjirenji Dam is a rockfill dam with an inclined core of impervious earthfill, separated by three graded transition zones on the downstream and two transition zones on the upstream of the core. The bulk of the rockfill was placed by dumping in 12m lifts and simultaneously sluicing with high powered water jets.
The spillway comprises a concrete-lined chute on the right bank and the crest is controlled by two radial gates. The gates are fully counter-balanced by suspended weights, and operation is automatically controlled by a float system connected to the reservoir water. Standby operation by electric power or manual method is incorporated.
The outlet works are in tunnels and a riser shaft on the left bank, and water is fed directly into the Chiredzi Left Bank canal for converyance to the irrigation scheme at Mkwasine Estates