Las Vegas National Golf Course
Cart and Foot Bridge Replacement

Sigma Engineering Solutions, Inc. was contracted by American Golf Corporation for the bridge hydraulic analysis and design for Las Vegas National Golf Course located in Las Vegas, Nevada.

The nature of this Project was the replacement of two existing pedestrian/golf cart bridge structures which had fallen into disrepair. These structures will be replaced with structures of similar size, span, configuration, and overall length. One of the bridges was damaged during a 2005 storm event. The Flamingo Las Vegas wash is one of the largest in the valley and flows through the Las Vegas National Course. In 2005 there was a fast snow melt storm in Mt. Charleston, resulting in the valley flooding. The rushing flood water went into the Flamingo wash and completely washed away bridge number three and damaged bridge number five approximately 8 feet higher than exiting grade at the locations of the abutments in order to meet Both bridges will be replaced with 120 foot-long 10-foot wide multi-use pedestrian and golf cart bridge structures, supported on cast in drilled hole concrete piers. The piers will be founded below maximum anticipated scour depth. New bridge abutments will be supported on cast in drilled hole concrete piers founded below maximum anticipated scour depth. Both bridge decks will be approximately 4 feet higher than the existing bridges and CCRFCD freeboard design criteria. 10-foot high wing walls will retain new embankment above existing grade outside the existing waterway. New approaches and associated grading will be constructed outside the existing waterway to allow the new bridge profiles to tie into existing cart paths and existing grading.

Sigma Engineering Solutions, Inc. also provided hydraulic analysis and design for the replacement bridges. The purpose of this project is to replace two existing bridges with new bridges capable of meeting local criteria including two-feet of freeboard above the 100-year water surface elevation. The new bridges will maintain the same pier configuration (location and size) as the existing bridges but will raise the low chord elevations above the existing bridges in order to eliminate any increases in water surface elevation due to overtopping of the bridge structures.

This project holds a very unique aspect. There was a very tight time frame, the bridge was needed to keep the course open and could not wait twelve months for FEMA approval. To alleviate this dilemma Sigma used a creative design that did not affect the surface elevation of the wash, which allowed us to circumvent FEMA review and approval.