An Introduction to Grouted Boulders 

This video provides background on the proper installation of grouted boulders, along with common problems to look for during construction. As with any infrastructure design or construction technique, proper engineering design is vital to a successful outcome. Grouted boulders are a mixture of large, quarried boulders placed closely together with concrete grout filling the voids between. Grouted boulders are used for stormwater improvements and stream stabilization along urban waterways and have become popular in the Colorado front range due to their natural design aesthetics, long history of successful applications, and our close proximity to high-quality rock sources.