Gravel Ridge Sewer Improvement District Collects Wastewater Digest Top Project Award

LITTLE ROCK, Ark. — The Gravel Ridge Sewer Improvement District 213 received a top project award from Wastewater Digest for its innovative upgrading of the lagoon wastewater treatment system. Halff served as the civil engineer for the project.

Located in Pulaski County northeast of Little Rock, Arkansas, Gravel Ridge SID 213 serves 1,500 customers. Facultative lagoons were a primary feature of the treatment process at this plant. Like many facilities with lagoons of a similar age, the process was no longer sufficient to meet the new effluent water quality standards imposed by the state, particularly with nutrient limits.

The Gravel Ridge Sewer Improvement District 213 was recognized as a top project in 2023 by Wastewater Digest. (Photo by Halff)

Halff repurposed the existing lagoons as equalization basins, saving more than $2.5 million on project costs. Halff engineers designed a new influent pump station to receive flow from both force mains and discharge to the new treatment plant headworks and a secondary discharge header to the lagoons for wet weather flow storage.

Editors from Wastewater Digest heralded the project as “the perfect example of a small utility upgrading from a wastewater lagoon treatment system while still finding use for those existing ponds.”

About the Firm

Halff is an award-winning, employee-owned, diverse and multidiscipline professional engineering firm that improves lives and communities by turning ideas into reality. For nearly 75 years, Halff has provided smart solutions for clients throughout the United States. The people-first firm is committed to continuously investing in its employees and fostering a culture of collaboration.

Halff has more than 30 offices in Arkansas, Florida, Louisiana, Oklahoma and Texas. The firm was recognized as the 2023 Texas & Louisiana Design Firm of the Year by the Engineering News-Record. Halff is ranked No. 85 in the 2023 Top 500 Design Firms rankings by ENR. Halff is the No. 16 Top Workplace nationally in 2024 as ranked by Energage for businesses with 1,000 to 2,499 employees.

For more information about Halff, visit halff.com.