1) Oahe Dam
The Oahe Dam is a large earthen dam on the Missouri River. The Oahe Dam was constructed by the United States Army Corps of Engineers.
It is one of the most beautiful dams in the world. The dam creates Lake Oahe, the fourth-largest man-made reservoir in the United States. The reservoir stretches 231 miles (372 km) up the course of Missouri to Bismarck, North Dakota. The dam’s power plant provides electricity for most of the part of the north-central United States. South Dakota Highway 204 runs directly atop the Oahe Dam which provides automobile crossing of the Missouri river at the dam. The world’s first rock tunnel the boring machine (TBM) was invented by James S. Robbins for the Oahe Dam project in 1952. The project provides flood control, hydropower generation, irrigation, and navigation benefits. Tours of the powerplant are given daily, Memorial Day through Labor Day.
The Oahe Dam Statistics
- Dam height: 245 feet (75 m).
- Spillway width: 456 feet (139 m).
- Lake maximum depth: 205 feet (62 m).
- Dam volume of earth fill:- 92,000,000 cubic yards (70,000,000 m³).
- Dam volume of concrete: 1,122,000 cubic yards (858,000 m³).
- Spillway crest elevation: 1,596.5 feet (486.6 m).
- Water speed through intake tunnels: 11 mph (5 m/s).
- The number of turbines: 7, Francis type, 100 RPM.
- Intake tunnel length: 3,650 feet (average) (1110 m).
- Shore length: 2,250 miles (3,620 km).
How to reach
- The dam is very close to North Dakota and can be reached via the freeway.