|Official name||Presa Zimapán|
|Owner(s)||Federal Electricity Commission|
|Dam and spillways|
|Length||122 m (400 ft)|
|Height||203 m (666 ft)|
|Width (crest)||5 m (16 ft)|
|Width (base)||22 m (72 ft)|
|Inactive capacity||1,390,000,000 m3 (1,126,891 acre·ft)|
|Surface area||22.9 km2 (9 sq mi)|
|Name||Zimapán Power Station|
|Turbines||2 x 146 MW Pelton turbines|
|Nameplate capacity||292 MW|
|Annual generation||1,064 GWh|
The Zimapán Dam, also known as Fernando Hiriart Balderrama Dam, is an arch dam on the Moctezuma River about 15 km (9 mi) southwest of Zimapán in Hidalgo state, Mexico. The primary purpose of the dam is hydroelectric power production and it services a 292 MW power station with water.
The dam was funded in part by a $460 million World Bank loan which was approved on 8 June 1989 and covered the Mexico Hydroelectric Development Project which included the Aguamilpa Dam as well. Mexico raised $250 in foreign capital as well. Construction on the dam began in 1990 and was complete in 1993. Beginning in 1994, the reservoir filled and the power station was operational by 1995. Approximately 3,000 people were displaced and resettled by the construction of both dams in the Mexico Hydroelectric Development Project.
The dam is a 203 m (666 ft) tall and 122 m (400 ft) long arch-type located in a narrow portion of the Moctezuma Canyon. The crest of the dam is 5 m (16 ft) wide while the base has a width of 22 m (72 ft). The reservoir created by the dam has a capacity of 1,390,000,000 m3 (1,126,891 acre·ft) and surface area of 22.9 km2 (9 sq mi). The reservoir is formed by the Tula and San Juan Rivers which join in the reservoir to form the Moctezuma River later downstream of the dam. Water from the reservoir is diverted through a 21 km (13 mi) tunnel, bypassing 42 km (26 mi) of the river downstream, before reaching the power station. Water at the power station powers two Pelton turbine-generators before being discharged back into the Moctezuma River. When both turbines are operating, the power station discharges a maximum of 59 m3/s (2,084 cu ft/s). It operates as a peak power plant, operating 4 to 12 hours a day depending on energy demands.
- "Implementation Completion Report Hydroelectric Development Project in Mexico". World Bank. 27 June 1997. Retrieved 21 June 2011. "The US$460 million Bank loan financed four project components: the Aguamilpa and Zimapan hydroelectric plants"
- "Identification of the environmental impacts caused by the expansion of Zimapan power plant". Dams and Reservoirs, Societies and Environmental in the 21st Century. Federal Electricity Commission. Retrieved 20 June 2011.
- "Environmental Flows for a Regulated River under a New Hydro Scheme". Federal Electricity Commission. Retrieved 20 June 2011.
- Guggenheim, Scott. "Mexico Hydroelectric Project". The World Bank Participation Sourcebook. p. 68. Retrieved 21 June 2011.