News & Insights

  • September 12, 2022

Chiques Creek Pollutant Reduction and Manheim Loop Greenway

Manheim Borough identified a 3,040-LF floodplain restoration/sediment removal/riparian buffer project along a section of the Chiques Creek in Memorial Park to comply with current MS4 Permit requirements. The project is...

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  • April 19, 2022
Farmdale-Ferndale Storm Sewer

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...

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  • October 8, 2021

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...

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  • October 8, 2021

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...

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  • December 30, 2020

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...

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  • December 30, 2020

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...

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  • May 21, 2020

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...

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  • February 5, 2019
East Main Street - After Image

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...

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  • April 12, 2017

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...

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  • April 12, 2017

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...

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