A PUBLIC STATEMENT ON THE WATER RELEASES AND FLOOD CONTROL
ACTIVITIES AND MANAGEMENT ON OYAN RIVER DAM PROJECT
(MAY 2019 – 21
ST OCTOBER 2019)
Ogun State harbors one of the two multipurpose Dams within the purview of the Ogun
Oshun River Basin Development Authority.
The Dam is Oyan River Dam which is part of strategic comprehensive development of the
water resources potentials of the Ogun River Basin and its watershed management.
The earth filled dam which is located on the Oyan River at about 15km North West of
Abeokuta city has a Reservoir Capacity of 270million cubic meters (mcm) covering an
approximate area of 40 square kilometers at a normal water level of 63m.
The average synthesized Annual Flow Volume of the Dam is average at 177Mcm against a
Gross Storage of 270Mcm. An Auxiliary Spillway some 400m long is provided about 1.1km
to the west of the Dam.
The Dam Design comprises of four radial gates for flood control and maximum releases of
water during the Rainy Season and three bottom outlets valves installed at 43.3meters
above main sea level for minimum releases of water in dry season.
The operations of these Gates are being carried out by a highly competent team of
Engineers, Scientists and Technicians.
The operation is being carried following Seasonal Rainfall Prediction of the Weather
Forecast of the Nigeria Meteorological Agency (NIMET) and the Annual Flood Outlook of
the Nigeria Hydrological Services Agency (NIHSA) and the Daily and Weekly Weather
Forecast.
The Rainfall, Reservoir Water Levels and Quantity of Water Releases are being recorded
daily by the Operators and are available and usually provided for scientific, engineering
and academic researchers.