The Mount Olympus Improvement District provides wastewater collection services for over 114,000 residents. HAL assisted the District in preparing a master plan to assess current conditions in the existing wastewater collection system, identifying needed improvements, analyzing impact fees, planning for future growth, and developing a list of capital facilities that will be needed.
Springville City provides wastewater collection services for 30,000 residents. HAL assisted the City in preparing a master plan to assess current conditions in the existing wastewater collection system, identifying needed improvements, planning for future growth, and developing a list of capital facilities that will be needed.
After years of rapid development of areas without sanitary sewer systems, Tooele County asked HAL to evaluate the impact of septic system discharges into groundwater. HAL employed hydrogeologic data and modeling of horizontal, vertical, and dispersion flows in a mass-balance approach with risk analysis to determine septic system densities that would prevent excessive groundwater nitrate concentrations.
Summit County Health Department retained HAL to evaluate the Henefer Valley, Coalville/Hoystville/Wanship Valley, and Kamas Valley aquifer systems to determine appropriate septic system densities to prevent excessive groundwater quality degradation. HAL developed a risk-based approach to the mass balance and further supported the justified septic system density limitations through additional research.
HAL prepared a Septic System Density Study for the Pole Canyon drainage area, which is the recharge area for Spanish Fork City’s Cold Springs. HAL researched historic water quality data and performed water quality sampling for comparison to determine the impact of existing septic systems in Pole Canyon on the springs. A detailed hydrogeologic evaluation coupled with the water quality data provided a basis for determining septic system density limits that would protect the City’s drinking water source from excessive water quality degradation.
HAL helped Herriman City develop a management program for septic systems within the Arnold Hollow drainage southwest of the City. Development within Arnold Hollow is a concern to the City because it is the recharge area for the City’s drinking water springs and there are no sewer collection facilities in the area. The program included research and evaluation of existing water quality, characterization of groundwater flow conditions, establishment of maximum septic system densities, and development of a program for approval of selected alternative septic systems that reduce nitrate concentrations in septic system effluent.
The Utah Department of Transportation is reconstructing three intersections along Bangerter Highway to improve traffic flow and safety. The new design requires relocation of existing South Valley Sewer District pipelines. HAL provided study and design of a new sewer route, plus survey, easements, stakeholder involvement, agency coordination, and services during construction.
South Salt Lake City selected HAL to design and manage construction of 3,800 feet of 30-inch-diameter trunk sewer along Andy Avenue, 300 West, and Utopia Avenue. The project included surveying, loading calculations, hydraulic modeling, geotechnical issues, pipeline design, conflicting utilities, UTA Trax (light rail) crossing design, easements, and cost estimation.
Highland City, Utah, has grown rapidly in recent years, straining its wastewater collection system. Consequently, the City desired a master plan that would both address existing system deficiencies and recommend future infrastructure to support further growth. HAL completed a Wastewater Collection System Master Plan with a schedule of capital projects to meet these needs.
HAL assisted with the construction of two wastewater pump stations for Granger-Hunter Improvement District. Both are of the dry well / wet well prefabricated type. The Valley Downs Pump Station includes two pumps rated at 500 gallons per minute; the Wheeler Pump Station contains two pumps rated at 650 gallons per minute. Both pump stations are approximately 30 feet deep and were constructed inside sheet piling to accommodate small construction sites in residential neighborhoods. Both feature backup power generation.