Water and Wastewater Systems

Water supply and water pollution control work including: project grant and loan finance assistance; feasibility and utility rate studies; operation, maintenance and management assistance; facility design; construction oversight and start-up assistance; and engineering to meet regulatory challenges of state and federal Safe Drinking Water and Clean Water Acts.

Water supply projects include: surface water and groundwater treatment plants, alluvial and deep wells, distribution pumping and transmission systems, water towers and standpipes.

Water pollution control projects include: wastewater treatment plants, aerated and facultative lagoons, sludge treatment land application facilities, gravity and pressure sewer collection systems, lift stations, and onsite wastewater treatment systems for individual homes.

Stormwater analysis projects include: hydrologic and hydraulic studies, floodplain elevation and delineation studies, drainage systems, and detention design for small subdivisions to developments of several hundred acres.

Decentralized Wastewater Treatment Systems (DCWTS) are used to treat and disperse or discharge small volumes of wastewater (daily flow < 20,000 gallons per day) originating from individual homes, clusters of homes, subdivisions and businesses not able to connect to a municipal sewer system. DCWTS utilize gravity, pressure and vacuum sewers for collection and a variety of treatment technologies including septic tanks and soil absorption fields, biofilters, sand filters, aerators, low pressure pipe, lagoons and spray and drip irrigation dispersal. Marshall Engineering & Surveying provides the surveying, layout and design for DCWTS systems. The firm also provides evaluations of existing DCWTS systems that are experiencing operational problems.

Engineering services to local municipalities and water districts. Currently we are:

- the City Engineer for the City of Slater, Missouri,

- the District Engineer for Public Water Supply District (PWSD) No. 1 of Audrain County, Missouri.

- the District Engineer for PWSD No. 2 of Audrain County, Missouri