Oahe Dam the Rocky Mountains forced the dam to open the release gates (not the spillway), releasing in June with another through the power plant totaling . The previous release record was in 1997. Oahe Dam The Oahe Dam is a large earthen dam on the Missouri River, just north of Pierre, South Dakota, United States. The dam creates Lake Oahe, the fourth largest man-made reservoir in the United States. The reservoir stretches up the course of the Missouri to Bismarck, North Dakota. The dam's power plant provides electricity for much of the north-central United States. It is named for the Oahe
Perunchani Dam of the reservoir. The dam is located about from Nagercoil, the administrative headquarters-town of Kanyakumari District, and about from the town of Kulasekharam. The average annual rainfall in the catchment is , and the average annual yield at the dam site is . The dam was constructed between 1948–1953 by the then State of Travancore-Cochin. The height of the straight gravity masonry dam above the deepest foundation is , with Full Reservoir Level (FRL) at , which is also the Maximum Water Level (MWL). The dam is long. The gross storage capacity of the reservoir is at the FRL, which