Despite the problems stemming from the low water availability of the dam, the water provided by the dam has played a major role in the recent development of South-East Nigeria. More than ten years after its completion, it is estimated that the Asejire dam has annually provided the community of Ibadan with a minimum of 20 percent of the total potable water demand. The dam's impressive performance during this time has been based on a combination of the following factors: The low unit water head (about 65m) due to the low water availability and the high retention capacity of the dam (more than two million cubic meters, and 800 MW installed capacity); previous retrofitting to increase the capacity and improve the performance of the spillways; the drought experienced by Nigeria during 1982-86; a unique combination between civil engineers and hydrologists; and the ability of the local authorities to provide governmental support to the repair of the dam.
In the early 90's, new cracks began to appear on the dam and the early signs of equipment and materials deterioration were noticed on the wing walls of the dam. The cracks developed and expanded, now reaching the concrete structure.
Crack indication became an important aspect of the dam's stability investigation. The existing technology had no possibility of efficiently detecting these early signs of degradation, which were not visible in surface condition nd represented the first sign of the inner cracks, which would damage the structure and create potential safety threats. There is a risk that the site will meet the same fate as the Washi dam, where engineering judgement was reinforced by the use of alarming instruments. The construction methodology was reused for the refurbishment of the same facility.
After the Asejire dam was constructed, the social benefit of its operation as a source of drinking water in Ibadan was obvious. The use of hydraulic technology (hydraulic engineering) was well developed in Ibadan. The staff on the dam located were able to move in aseptic conditions and through dark paths that were only large enough to accommodate light trucks, through the dam's lower part (the minimum recommended elevation is 1520 m above sea level). d2c66b5586