Average annual rainfall is 1,254 millimetres (49.4 in), with peaks in July and September, and little rain between November and February.

The headworks were designed to supply potable water to the communities of Oba, Eko-Ende, Eko-Ajala, Ikirun, Iragbiji and Okuku.

[citation needed] The dam is an earth structure, completed in 1979, with a capacity of 910,000 cubic metres (32,000,000 cu ft).

[citation needed] The Jalumi War of 1 November 1878 took place in the hilly country of the northeast of Osun State in the area that includes Ikirun, Iba, Inisa, Okuku and Eko-Ende.

[2] In March 2022 the former king Elende of Eko-Ende Oba Abdul-Rauf Adebayo Ajiboye joined is acestors.