Boulder City Bypass

Sigma is currently the lead structural design firm for this project.  This project includes constructing approximately 12 miles of Interstate freeway to ultimately link Mexico City to Canada by way of Phoenix and Las […]

Christchurch, New Zealand Demolition Support

Sigma was contracted to assist the United States Army Corps of Engineers Pacific Command with earthquake recovery efforts in Christchurch, New Zealand in March and April 2011.

Sigma’s primary tasks were to provide demolition engineering […]

McGuire/Carpenters Building

Sigma was the engineer of record, and was involved in the conventional demolition of the 26 story McGuire building, located in downtown Seattle, WA. This project involved the demolition of a post-tensioned concrete slab building, […]

I-15 Design-Build South Structural Lead

The I-15 South Design-Build project stretches from Tropicana Avenue to just south of Silverado Ranch Boulevard in Clark County, Nevada.

The project involves the widening of I-15, the addition of collector-distributor roads, redesigned interchanges, and […]

Harmon Tower Demolition

Sigma’s team of skilled engineers was responsible for preparing and executing a detailed design and demolition sequence for the demolition and removal of the 26-story concrete building located on the Strip in Las Vegas, […]