Daniel-Johnson dam
The Daniel-Johnson dam (French: Barrage Daniel-Johnson), formerly known as Manic-5, is a multiple-arch buttress dam on the Manicouagan River that creates the annular Manicouagan Reservoir. The dam is composed of 14 buttresses and 13 arches and is 214 km (133 mi) north of Baie-Comeau in Quebec, Canada. The dam was constructed between 1959 and 1970 for the purpose of hydroelectric power production and supplies water to the Manic-5 and Manic-5-PA power houses with a combined capacity of 2,660 MW. The dam is 214 m (702 ft) tall, 1,314 m (4,311 ft) long and contains 2,200,000 m3 (2,900,000 cu yd) of concrete, making it the largest dam of its type in the world.
| Daniel-Johnson dam Barrage Daniel-Johnson | |
|---|---|
Location of Daniel-Johnson dam Barrage Daniel-Johnson in Quebec | |
| Location | Manicouagan Regional County Municipality, Quebec, Canada |
| Coordinates | 50°38′48″N 68°43′28″W |
| Construction began | 1959 |
| Opening date | 1970 |
| Owner(s) | Hydro-Québec |
| Dam and spillways | |
| Type of dam | Concrete, multiple-arch buttress |
| Impounds | Manicouagan River |
| Height | 214 m (702 ft) |
| Length | 1,314 m (4,311 ft) |
| Width (crest) | 3 m (10 ft) |
| Width (base) | 22.5 m (74 ft) |
| Dam volume | 2,200,000 m3 (2,900,000 cu yd) |
| Spillway type | Service, gate-controlled |
| Reservoir | |
| Creates | Manicouagan Reservoir |
| Total capacity | 142 km3 (115,000,000 acre⋅ft) |
| Catchment area | 29,241 km2 (11,290 sq mi) |
| Surface area | 1,950 km2 (753 sq mi) |
| Power Station | |
| Operator(s) | Hydro-Québec |
| Commission date | 1970-71 (Manic-5) 1989-90 (Manic-5-PA) |
| Turbines | 8 x 199.5 MW Francis-type (Manic-5) 4 x 266 MW Francis-type (Manic-5-PA) |
| Installed capacity | 1,596 MW (Manic-5) 1,064 MW (Manic-5-PA) |
The dam was named after Daniel Johnson Sr., the 20th Premier of Quebec, responsible for starting the project while serving as a minister in Duplessis's government. Johnson died on 26 September 1968, the day he was to preside over the scheduled inauguration of the dam. The facility is owned and operated by Hydro-Québec.