Tanzania imports all of its crude oil; the refinery at Dar es Salaam refined about 14,900 barrels per day in 1999 and exported petroleum products to Rwanda and Burundi. The Songo Songo gas field off Kilwa Kisiwani had proven reserves of 41 billion cu m, and a project was underway, with Canadian interests, to develop the gas field, build pipelines, and set up treatment plants. Another gas deposit of about 130 billion cu m has been found at Kimbiji, about 40 km (25 mi) south of Dar es Salaam. Tanzania has extensive low-sulfur coal reserves that are only moderately exploited; production in 1997 was an estimated 10,000 short tons.
Installed electrical capacity was 620,000 kW in 2001; of the total, over half was hydroelectric. Launched in 1991, an eight year program included the commissioning of the 200-MW Jihansi power station, enlargement of the Pangani Falls station, and the construction of a power line from Singida to Arusha. With the addition of the 80-MW Mtera hydroelectric station on the Great Ruaha River, the Kidatu complex now has a generating capacity of 519 MW. Electrical production in 2000 was 2.8 billion kWh, of which 18.1% was from fossil fuels and 81.9% from hydropower. Consumption of electricity in 2000 was 2.6 billion kWh. The Tanzanian Electric Supply Co., acquired by the government in 1964, provides a large proportion of the output. Public power generation on the island is the responsibility of the Zanzibar State Fuel and Power Corp.