Mexican utility Comision Federal de Electricidad (CFE) seeks bids for construction of two diversion tunnels to bypass a mudslide that blocked the Grijalva River among the dams of the Grijalva hydroelectric system. A project meeting is scheduled November 18, with bids due December 4.
Crews managed to dig a canal through the November 2007 mudslide that allowed partial resumption of river operations. However, CFE said the tunnels are necessary due to the magnitude of the 20 million-cubic-meter slide and the continued instability of the land in the area. (HNN 9/12/08)
The two 14-meter-diameter, 900-meter-long tunnels would cut through the neck of a horseshoe bend in the river, bypassing the mudslide in the river’s bend. The tunnels would carry flows of 2,150 cubic meters per second, which, added to the remaining flows through the mudslide canal, would allow total flows of 4,100 cms.
CFE said the project would ensure normal operation of the Grijalva River hydro projects, 1,080-MW Malpaso (also called Nezahualcoyotl), 420-MW Penitas (Angel Albino Corzo), 2,430-MW Chicoasen (Manuel Moreno Torres), and 900-MW La Angostura (Belisario Dominguez). (HNN 1/5/07)
Construction is expected to require 18 months, beginning January 5, 2009, at a cost of 750 million pesos (US$57.4 million).
A project meeting is scheduled November 18. Tender documents may be obtained until November 28. They are available, under solicitation No. 18164081-007-08 on Mexico’s tender Internet site, www.compranet.gob.mx. To obtain the documents, follow links Licitaciones, Vigentes, Obras Publicas, Todas, and enter the solicitation number in the box labeled Numero de la licitacion.
Bids are due by noon December 4. For information, contact Comision Federal de Electricidad, Gerencia de Licitaciones y Contratacion de Proyectos, Subdireccion de Contratacion de Proyectos de Inversion Financiada, Paseo de la Reforma 164, Mezzanine 1, Colonia Juarez, Distrito Federal 06600 Mexico; Fax: (52) 5229-4755; E-mail: email@example.com; Internet: www.cfe.gob.mx.