25TH AVENUE GRAVEL PIT

WATER STORAGE RESERVOIR AND INLET/OUTLET STRUCTURES

Greeley, Colorado

Lyman Henn provided engineering services for design and construction of an 8,460-ft-long slurry wall enclosing a 70-acre gravel pit to create a water storage reservoir. This reservoir will serve to provide water re-timing ability for the City. A slurry wall which encloses two adjacent reclaimed gravel pits was designed by Lyman Henn. Work performed included a supplemental geotechnical investigation, site specific surveying, a technical feasibility study, an initial design and cost estimate, an evaluation of design/build contracting, and preparation of final design and specifications. Lyman Henn provided construction monitoring and quality control during slurry wall construction. Lyman Henn designed and performed the Initial Liner Test on the lined reservoir as required by the State Engineer's Office. Lyman Henn performed part-time construction monitoring during inlet/outlet construction to monitoring geotechnical components to the construction.