Improved Flood Protection to Protect Life and Property

The Able Pump Station, located in Dallas on the south side of Riverfront Boulevard between the Houston and Jefferson Street viaducts, is designed to provide 100-year flood protection to approximately 3 square miles (7.7 square km), including 171 acres of highly desirable land.

The properties adjacent to the previous Able sump complex have experienced frequent flooding. The sump complex includes nine separate and interconnected ponds that store stormwater, as well as two existing pump stations, constructed in the 1930s and 1950s, with a current combined capacity of 220,000 gallons (832,791 liters) per minute. To help prevent the loss of life as a result of flooding, the City of Dallas hired HDR to design the new Able Pump Station, which increases the pumping capacity nearly fourfold, to 875,000 gallons (3,312,235 liters) per minute. It also lowers the 100-year flood elevation from 399 feet (121.6 meters) to a design elevation of 392.5 feet (119.6 meters).

The new pump station utilizes 3,000 HP concrete volute pumps as the pumping units. The station has dual primary electric service and dual transformers to provide reliable service, and is integrated into the new communications system used by the City’s flood control staff. The dual power provides an automatic switchover to a backup power supply in the event the primary power is lost during a flood. The secondary independent power feed enables the City of Dallas Flood Control to continue pumping flood waters into the Trinity River, preventing loss of life and any unnecessary damage to the adjacent properties in the area.

The project includes constructing the new pump station, decommissioning two existing pump stations, improving the connections between nine ponds that form the sump system, and designing aesthetic improvements. Soils in the area are very poor, and the pump station structures were constructed on piers. The station has an elaborate groundwater mitigation and management system to protect the foundation.

We have provided the following services: surveying; geotechnical investigation and engineering; planning; civil, electrical, mechanical, architectural, process and hydraulic design; 404 and 408 permitting; and construction administration.