IMROVEMENTS TO LAGO REGULADOR DE ISABELA DAM

 TRCE was contracted to prepare the construction documents required for the restoration of the reservoir liner, refinement of the reservoir’s internal geometry, including sediment deposits, provide stronger protection for the new liner system, improvements to overall site safety, and upgrades to site runoff drainage.

The Puerto Rico Aqueduct and Sewer Authority (PRASA), as the dam owner, contracted our firm through CSA–Berger JV. The project scope also included the design of a temporary raw water intake to the Canal Principal; a seepage collection system between the Moca Channel and the reservoir; a stormwater management system incorporating infiltration; a new raw water intake bridge to the intake tower; improvements to the intake tower; a new bypass and downstream connection; a new upstream water intake; and improvements to the project fencing.

Additional work included the design of a solar power system consisting of floating solar panels located within the reservoir to provide electrical power to the dam facilities, as well as a reservoir bathymetric survey.

The project is currently at 100% document completion.

TRCE conducted a bathymetric survey of Lago Regulador de Isabela as part of the LRI Dam Retrofit Project. The survey was performed to estimate the amount of sediment accumulated at the bottom of the reservoir and support the retrofit project. TRCE utilized a dual-frequency single-beam echosounder integrated with a Real-Time Kinematic (RTK) GNSS positioning system to accurately measure both the soft sediment surface and the underlying hard bottom.  Data were processed using hydrographic survey software to generate surface models and calculate sediment volume.