1. Farmdale-Ferndale Storm Sewer Improvements

    West Hempfield Township was looking to pave the streets in one of its neighborhoods as part of a capital improvement project. The neighborhood was built in the 1970s and the existing stormwater infrastructure was also in need of repair and/or replacement. RETTEW worked with the Township to analyze the existing pavement, curbing, and stormwater facilities…

  2. Murry Ridge Park Green Infrastructure Improvements

    RETTEW worked with West Hempfield Township to develop a comprehensive, cost-effective strategy to achieve required sediment reduction loads in compliance with their 2018-2023 MS4 Permit requirements. This strategy included a variety of green infrastructure best management practices to reduce stormwater rates and volumes, increase groundwater supplies, filter stormwater pollutants, increase biodiversity and habitat for native…

  3. Manor Township Detention Basin Retrofit

    As an MS4 Permittee, Manor Township is required to reduce stormwater pollutants to maintain compliance with their MS4 Permit requirements and to improve water quality in local streams and the Chesapeake Bay. The Township owns six dry detention basins that will provide significant pollutant reductions after being retrofitted into bioretention basins. Two of the existing…

  4. West Hempfield Township Pollutant Reduction Plan

    As an MS4 permittee, West Hempfield Township needed to submit a pollutant reduction plan (PRP) to comply with the Pennsylvania Department of Environmental Protection’s MS4 Program requirements. The Township needed to determine the existing pollutant loading rates attributed to the MS4-regulated area, and identify stormwater best management practices (BMP) to reduce sediment, phosphorus, and nitrogen…

  5. Lefever Road Detention Basin Retrofit

    Rapho Township implemented a detention basin retrofit project on property they own that will reduce their sediment loading rates by 25,537 pounds per year, phosphorus rates by 10 pounds per year, and nitrogen rates by 336 pounds per year. This project achieves a significant portion of the Township’s required pollutant load reductions for their 2018…

  6. Paradise Township Detention Basin Retrofit

    Paradise Township implemented a detention basin retrofit project that will reduce their sediment loading rates by 30,695 pounds per year, phosphorus rates by 12 pounds per year, and nitrogen rates by 362 pounds per year. This project achieves a significant portion of the Township’s required pollutant load reductions for their 2018 to 2023 MS4 Permit….

  7. East Main Street Stormwater Improvements

    West Earl Township experienced localized flooding and infrastructure deterioration along East Main Street in Brownstown caused by stormwater runoff. Rain events resulted in hazardous conditions for motorists and pedestrians. Main Street serves as a connection between the schools, parks, public transit, residences, and local businesses. Streets and homes were often flooded, and the curbs, sidewalks,…

  8. Palmyra Stormwater Forebay and Wetlands Design

    Railroad Street in the northern section of Palmyra Borough had ongoing flooding issues and required strong stormwater management to provide solutions. However, the Borough needed to secure funding in order to move the project forward. As the Borough Engineer, RETTEW assisted the client in securing Growing Greener Grants for design and construction of the forebay…

  9. Harrisburg Area Community College Stormwater Management System

    Harrisburg Area Community College (HACC) wanted to improve their stormwater management system at their Gettysburg Campus, specifically to improve water quality and conservation by incorporating carefully planned best management practices (BMPs). RETTEW worked closely with HACC and project partner Adams County Planning Commission to design a new stormwater management plan that addressed both stormwater quality…

  10. London Vale Road Storm Sewer System

    During the review of the land development plans for Pequea Valley School District’s new Paradise Elementary School, RETTEW determined that the proposed storm sewer system did not comply with the Township’s requirements to discharge water to a watercourse. The School District needed to design, develop, and build a storm sewer system that would meet this…

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Community Support

RETTEW Charitable Foundation Awards Grant to Good Karma Garage

RETTEW is excited to announce Good Karma Garage is the recipient of a $7,000 grant from the RETTEW…

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Services

Evolving With Our Clients and Technology

For the last decade, RETTEW has been providing North America’s largest flat-rolled steel producer with visual structural inspections…

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