The Radial Gates and Valves through which Water Releases are made can be operated in at
least three ways with power supply from the National Grid, Generators and Manually by
the Operators in case of power failure or electrical faulty.
For this year, in preparation for the Rains and Floods as forecasted, the Butterfly Valve and
Regulatory Valve 1 & 3 were opened on the 22nd of May 2019 at water level of 59.53m above
main sea level for de-siltation and to create space to accommodate excess water for
proper Flood Control, while Gates 1 & 4 were opened gradually from 1% each on the 28th of
May 2019 to further create more space.
Since this time we have been lifting and lowering Gates so as to maintain Dam stability.
From records obtainable at the Dam Project site, it is recorded that the cumulative
Rainfall for the month of May, 2019 was 160.10cm while the Total Water Releases was
11.0mcm and this dropped the height of the Reservoir by 56cm down.
Also in June, Rainfall was 276.00cm while the Total Water Releases was 125mcm. The total
water level of the Reservoir dropped to 142cm.
In July, we have Rainfall of 57.6cm with increase in height of the Reservoir by 14cm with
Total Volume of Water Releases at 104mcm.
In August, Rainfall was 67.35cm while increase in height of the Reservoir came to 24cm with
Total Water Releases of 316mcm.
We observed much more rainfall in the month of September totaling 149.70cm which
increased the height of the Reservoir by 146cm with Total Level of Water Releases being
554mcm.
In the month of October, the rain pattern changed with us having rainfall of 59.3cm within
the period of 24hours given a sharp rise of 102cm within the four days which as a result
cause the dam to rise 0.2cm above 63m which is the Design height at normal full capacity.
In the next six days we were only able to reduce the height by only 50cm because of the
population of the people downstream.
Noting that the Design Capacity of the Dam is 270mcm from the Dam bed (bottom) and
between 1
st and 20th of October the total of approximately 474mcm volume of water was
allowed to pass through the four gates despite the fact that we held 74.82mcm volume