Rio Grande de Loiza PR (C)

May 2023


Rio Grande de Loiza PR (C)
Construction (C)
Congressional District: Puerto Rico


The Río Grande de Loíza basin, the island’s largest, is located just east of San Juan and covers approximately 310 square miles. The project is located in the cities of Gurabo and Caguas. Almost 5,000 families are affected by flash floods, as well as hundreds of commercial structures and public facilities. The authorized plan of improvement includes channelization of Río Bairoa and Río Caguitas, as well as levees along the Río Grande de Loíza and Río Gurabo to protect urbanized areas.




Puerto Rico Department of Transportation and Public Works (DTOP) 
P.O. Box 41269, Minillas Station 
San Juan, Puerto Rico 00940-1269


The project for flood control, Rio Grande De Loiza, Puerto Rico, was initially authorized by section 101(19) of the Water Resources Development Act of 1992 (106 STAT. 4803) and deauthorized on October 1, 2012, under Section 1001(b)(2) of the Water Resources Development Act of 1986. The project received funding under P.L. 115-123: Bi-Partisan Budget Act of 2018, Supplemental Program but deferred due to lack of funding to cover updated cost. The project was determined to be technically feasible, economically justified, and environmentally acceptable in a Scope Verification Report dated June 12, 2019 and was approved by the Assistant Secretary of the Army (Civil Works) on July 29, 2019. The project has been re-authorized under section 8307 (3) of the Water Resources Development Act of 2022.


Click for full-sized map of Rio Grande de Loiza project