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1989 - Second Ansaldo 35 MWe came online. 1998 - Two units’ combined production was 12 MWe from six wells as of June. 1998 - ENEL issued a request for a public bid for field reclamation and plant rehabilitation; pre-qualified four international geothermal development companies (Oxbow,BufeteIndustrial,Caithness,andOrmat). Ofthe four companies, only Ormat submitted a bid and, due to Nicaraguan law, the bidding process was voided and a second request for bids issued. The program proposed is a 15-year development, operation,andmaintenanceconcessionandPPA. ENEL will keep title to the plant, well field, etc. NOTES Formally known as the Central Geothermal “Patricio Argüello R.” Plant, Momotombo has two 35 MWe single-flash units which have been online since 1983 and 1989respectively. Thefield,including43wells,was developed and is operated by ENEL. Momotombo has an installed capacity of 70 MWe but, due to reinjection and over-development problems, is currentlyproducingonly12MWe. Ofits43wells,only 6 are operating. The field principally is producing from a shallow reservoir of less than 1000 m. All geothermal fluids have been discharged into Lago Managua; there is no reinjection. Due to the overexploitation of the field and a total lack of reinjection during the 1980s, the power output at Momotombohasdeclinedsignificantly. AsofJune 1998, the plants’ combined production was 12 MWe. Geological studies indicate that both intermediate (1000±m) and deep (2500m) geothermal reservoirs exist at Momotombo. There is sufficient evidence to verify the existence of at least 35+ MWe of geothermal steam and a very strong possibility of bringing the field back to the full 70 MWe or more (Dick, 1998). Under the Stabilization Project implemented with funds from the Investment Fund of Venezuela (FIV), ENEL directed the drilling of three production replacement wells (MO-41, MO-42, and MO-43) of which only MO- 42 was successful, producing 3 MWe in stable production ENELhasissued twobidsin1998forfield reclamation and plant rehabilitation. The price for electricity produced at the Momotombo Power Plant is very high, 4.8-5.3¢/kWh compared to 3.5- 4.0¢/kWhforhydro-power. Plantsonthefieldsunder development will have prices comparable to those found Geothermal Resources in Latin America & the Caribbean 84PDF Image | Geothermal Resources in the Caribbean and Latin America
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