Out of our Denver office, we serve Colorado, Montana, North Dakota, South Dakota, Wyoming, New Mexico, and western Nebraska and Kansas.
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Our expertise
We specialize in foundation support, slope stabilization, earth retention, ground improvement, expansive/collapsible soil issues, infrastructure, and environmental remediation.
Our ties to Denver, Colorado
Keller’s experience and reputation in the Denver Metro area are unmatched in our industry. We have had an office in Colorado for over 40 years, employing over 300 professional and craft workers. The Denver skyline and local construction industry have directly benefited from Keller’s work in the market.
Some of Keller’s local noteworthy projects include work on the Denver Broncos Stadium, I-70, I-25, Denver International Airport, and the Light Rail expansion from downtown to DIA.
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Project summary
Big Goose Creek Slope Rehabilitation
As both construction manager and general contractor, Keller performed several techniques to provide slope stabilization below a Sheridan, Wyoming junior high school.
In 2017, an 80-ft-tall slope near a junior high school began to fail. Without remediation, any further movement would block a creek at the toe of the slope and cause widespread local flooding. Keller, known worldwide for its innovative geotechnical solutions, devised a multi-technique solution to stabilize the slope and ensure stability.
First, Keller constructed a 20-ft-high soil nail wall, installing a total of 460 soil nails up to 35 ft long. A drainboard was installed behind the entire wall to collect and divert groundwater. Lower down, the team opted for a 20-ft-tall, anchored soldier pile wall. Over 140 soldier piles were installed up to 60 ft deep, along with two rows of high-capacity anchors. Behind the wall, horizontal drains were constructed to intercept groundwater and funnel it into a dedicated drainage system.
To further increase the safety of the slope at its base, Keller constructed a gabion retaining wall up to 8 ft high and 3 ft wide along the creek. Thirty-foot-long anchors were installed for the first row of baskets, with additional anchors every fourth row. Finally, shotcrete was applied, hand-carved, and stained to create a natural-looking finish.
We are very pleased with the collaborative effort between everyone involved including our local subcontractors, suppliers, and Sheridan community. The use of several remediation techniques provided a cost-effective long-term solution that is both functional and aesthetically pleasing.
Senior Project Manager