river in central and northwestern Dominican Republic, the largest river in the country. Its headstreams rise on the northern slopes of the Cordillera Central, uniting to descend northward into the Cibao Valley, which lies between the Cordillera Central and the Cordillera Septentrional. The river then flows generally west-northwestward through the agricultural Cibao Valley before emptying into Manzanillo Bay, off the Atlantic Ocean, just downstream from Monte Cristi. The stream is 240 miles (386 km) long; although generally shallow and therefore navigable only by small craft, it is subject to flooding during the rainy season. Its waters are used extensively for irrigating rice, sugarcane, plantain, and tobacco in the Cibao Valley; Tavera hydroelectric dam at Tavera, south of Santiago de los Caballeros, was completed in 1972.