Prairie Waters Project: Low Perm Barrier

Prairie Waters Project: Low Perm Barrier

Weld County, Colorado

The Prairie Waters Project (PWP) includes a diversion of Aurora’s South Platte River water near Brighton, Colorado, to a natural purification system, referred to as the Aquifer Recharge and Recovery (ARR) site, where the movement of water through sand and gravel performs a natural pretreatment process.

Low Permeability Barrier Construction for the Prairie Waters Project – Jet Grouting

The ARR site is encircled by a low permeability barrier (LPB) which consists of three primary components: bentonite-soil backfill, cement stabilized backfill and soilcrete jet grouted columns.

Low Permeability Barrier Construction for the Prairie Waters Project – Betonite Wall

The average width of the LPB is 3.5 feet while the total depth ranges from 28 to 60 feet. The average trench depth is 44 feet and the total length of wall is approximately 16,280 feet. The surface area of the LPB is approximately 720,275 ft2 and encompasses approximately 221 acres.

Deere & Ault Consultants, Inc. provided engineering services related to the LPB that included: geotechnical investigations, design engineering, and construction engineering. The information collected during the investigations was incorporated into the design of the LPB.

Deere & Ault prepared plans and specifications that were incorporated into the PWP Construction Documents. During construction, D&A provided construction observation, as-built documentation, and on-site quality assurance testing.

Client:  City of Aurora

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