Alliance engineers prepared plans and specifications for the Springhill Wastewater Infrastructure Improvements. The improvements consisted of a new wastewater treatment plant along with collection system improvements and expansion.

The wastewater plant project consisted of converting part of an existing oxidation lagoon to a Biolac Wastewater Treatment System, which is capable of processing an average daily flow of 0.8 million gallons of sewage. The collection system improvements included the construction of collection system extensions, gravity mains, force mains, 156 manholes and nine lift stations. The gravity mains were extended to 65,000 l.f. of line, and force mains were extended to 10,000 l.f. The improvements also required site engineering, Dynaguard filter, inlet piping, headworks and hydraulic improvements.

The collection system improvements were phased into four separate projects over a few years. The following are descriptions of the phases:

Phase I - Plans and specifications and construction observation for 15,000 ft. of 8" sewer mains, six (6) lift stations, seventy-three (73) manholes, and 7,300 ft. of force main.

Phase II - Plans, specifications and construction observation for 21,500 ft. of 8" mains, 700 ft. of 15" main, nine (9) lift stations, eighty (80) manholes and 9,500 ft. of force main.

Phase III - Plans, specifications and construction observation for 10,000 ft. of 8" mains and thirty (30) manholes.

Phase IV - Plans and specifications for 2,100 ft. of 15” sanitary sewer main, 350 ft. of 10” sanitary sewer main and 5,000 ft. of 8” sanitary sewer main. Also included in this project are an above ground pump station, two (2) lift stations, 2,500 ft. of force main and service line. The project encompassed over 18,000 linear feet of cured in-place pipe ranging from 18” to 8”.