Martinsburg Municipal Authority Wastewater Treatment Plant

Martinsburg Municipal Authority Wastewater Treatment Plant (1995 – 2025)

LSSE has and continues to work with the Martinsburg Municipal Authority on numerous projects related to their Sanitary Sewer and Wastewater Treatment Plant. Challenges that LSSE has assisted at this facility includes a large reduction of Inflow and Infiltration, construction of a SBR treatment plant, compliance with Chesapeake Bay discharge limits, and overall system maintenance.

Treatment Plant and I/I Project
In 1993-95, LSSE completed a comprehensive planning, design and permitting for construction of a 1.2 mgd advanced secondary municipal sewage treatment plant providing BOD5, suspended solids, ammonia nitrogen and phosphorus reduction for discharge to a small headwater tributary to the Susquehanna River Basin. The project included SSES and related infiltration/inflow (I/I) investigations, flow monitoring and I/I mitigation resulting in elimination of 50% of measured I/I by replacing approximately 10% of existing sanitary sewers (installation of new parallel sanitary sewer system up to individual basements and conversion of the existing sewers to a dedicated groundwater underdrain.)

Since construction of these improvements, the Authority under NPDES permit renewals has received decreased limits for Total Nitrogen and Total Phosphorus in accordance with the Chesapeake Bay initiative for a reduction in nutrients in this watershed. The treatment plant continues to be in compliance with
these requirements and has been in the position to sell nutrient credits to other municipalities.

Headworks Improvements

In 2011, LSSE begun a phased replacement of headworks pumping system with a replacement chopper-style heavy duty pump that is capable of macerating solids that were being encountered during the draining of tanks. Project was phased in accordance with Authority available annual budget. This project included modifi cation of the infl uent fl ow arrangement into the wet well to eliminate cavitation of the pumps. Baffl es were installed in the wet well to direct fl ow away from the pumps. The final portion of the project was the replacement of the existing control panel with a new VFD controlled pump control panel that included integration of this pumping system into the Authority SCADA system via radio communications. Integration of the system into the Authority SCADA system allows for database recording of pump run times, online monitoring of wet well levels and pump status, as well as monitoring of all alarm conditions and operator notification. In 2023, in response to an increase in flushable wipes at the treatment plant, LSSE assisted the Authority in design, permitting and construction of a new headworks dual auger system to remove flushable wipes from the treatment process.

Future Sewer Planning

LSSE prepared a 25-year capital project plan of the Sewer System to identify long term budgeting requirements for maintaining both the treatment plant as well as the sewer system. The Authority utilizes this plan to prioritize system wide improvements and includes as part of their annual budget preparation. that are cost effective for replacement. LSSE has designed and assisted the Authority in completion of several of these projects.

MARKETS:

• Utilities & Infrastructure

SERVICES:

• Civil – Environmental Engineering
  • Wastewater Facilities Engineering
• Surveying