Interstate 80 (I-80) in Pennsylvania runs for 311 miles across the central part of the state. While this highway does not serve any major cities in Pennsylvania, it is a...
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Under an open-end agreement with Pennsylvania Department of Transportation District 3-0, RETTEW prepared preliminary engineering, final design, and a final cost estimate within 1 percent of the bid for the...
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RETTEW addressed persistent groundwater contamination at a Pennsylvania Department of Transportation (PennDOT) maintenance facility, stemming from previous operations involving a diesel underground storage tank. Despite PennDOT’s prior attempts, achieving regulatory...
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The intersection of SR 0034, SR 0850, and Pisgah State Road in Shermans Dale was plagued with a significant number of traffic accidents. The four-legged intersection posed serious safety risks,...
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Replacing this twin-barrel arch bridge on a heavily traveled corridor posed significant challenges because of the limited crossings of the waterway and the need to maintain traffic flow. RETTEW designed...
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RETTEW worked with Lancaster County for more than a decade to prioritize rehabilitation and replacement of their structurally deficient bridges. The Big Conestoga #1 Bridge was the last remaining bridge...
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Elizabethtown Borough wanted to complete the pathway network within the borough that was part of a phased planning, design, and construction project reflecting the Regional Official Map for Trails as...
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RETTEW conducted a site characterization and remedial action of a former automobile service and fueling station property acquired by the Lehigh-Northampton Airport Authority (LNAA). Upon acquisition, historical regulatory obligations related...
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Since 2015, RETTEW has provided Lehigh-Northampton Airport Authority (LNAA) and Lehigh Valley International Airport (ABE) with industrial National Pollutant Discharge Elimination System (NPDES) consulting, compliance, and permitting support. The initial...
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The intersection of SR 172 and Perry Drive was on Ohio’s Governors priority list of the top ten most dangerous intersections in the state and needed significant upgrades to increase...
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