1. PennDOT Publication 783 – Environmental Permitting Handbook

    The Pennsylvania Department of Transportation (PennDOT) needed their guidelines for preparing waterway and environmental permits organized efficiently to improve the permitting process. In addition, guidelines for preparing earth disturbance and waterway permits were either absent or not easily found. This resulted in inconsistent permit applications, technical deficiency letters from permitting agencies, and missed project schedules….

  2. Allegheny River Bridge Wetland Mitigation Monitoring

    The Pennsylvania Turnpike Commission (PTC) replaced the Allegheny River Bridge as part of a roadway reconstruction project. To comply with the U.S. Army Corp of Engineers and Pennsylvania Department of Environmental Protection (PA DEP) regulations, PTC needed to construct and maintain 1.8 acres of replacement wetlands to satisfy the wetland mitigation requirements associated with aquatic…

  3. Pequea #5 Bridge

    The Pennsylvania Department of Transportation (PennDOT) identified the existing three-span Pequea #5 Bridge as structurally deficient, so Lancaster County set out to replace it and concurrently address other important public concerns. Specific project goals included eliminating the piers to reduce maintenance costs, accommodating the Amish community, preserving the rural historic district, to which the bridge…

  4. North Locust Street Bridge Replacement

    The existing two-span, 37-foot-long North Locust Street Bridge over Santo Domingo Creek carried 2,400 vehicles per day through Lititz Borough but was structurally deficient due to scour and poor pier condition. Looking for one less structurally deficient bridge in their community, the Borough received federal monies to replace the concrete slab bridge. The Borough wanted…

  5. Pennsylvania Turnpike Commission 5-Mile Resurfacing

    Under an open-end work order for the Pennsylvania Turnpike Commission, RETTEW provided preliminary design and final engineering services for a resurfacing project along the Northeast Extension. The project required field inspection of a 5-mile stretch to identify milling and paving limits, safety issues, drainage repairs, and areas requiring full-depth patching. Knowing digital field data collection…

  6. SR 4011 Fruitville Pike Highway Widening and Signalization Project

    In order to complete a new 500,000-SF retail development along the primary east-west highway serving this region, Manheim Township and the Pennsylvania Department of Transportation (PennDOT) required an extensive analysis of off-site intersection improvements to SR 4011. The client needed a detailed traffic impact study to determine the major roadway improvements that would minimize traffic…

  7. West College Avenue Improvements

    College Avenue in Elizabethtown Borough was in need of more efficient transportation infrastructure to decrease traffic congestion and hazards as well as improve traffic flow. To accomplish this goal, RETTEW split the project into two phases. The first phase relocated an existing borough street to avoid placing heavy traffic in local neighborhoods with small intersections,…

  8. Newville Road Bridge Replacement

    West Donegal Township closed Newville Road Bridge in the 1990s because of excessive corrosion in its asphalt-filled metal deck pans. After receiving federal funding administered through the Pennsylvania Department of Transportation (PennDOT) for the project, the Township selected RETTEW to develop a new bridge and approach roadway that met both PennDOT and Amtrak design criteria….

  9. Mon/Fayette Expressway Expansion Phase I Environmental Site Assessment

    The Mon/Fayette Expressway system is a 25-year regional transportation improvement project aimed at providing continuous travel from I-68 in West Virginia north to I-376 in Monroeville, Pennsylvania. The final leg of the project, PA Route 51 to I-376, is a 14-mile extension of the 74-mile system that affords direct access to the eastern suburbs of…

  10. Lehigh Valley International Airport FedEx Ground Distribution Center & Roadway Improvements

    LNAA, on behalf of FAA, retained RETTEW to complete the Section 106 process, beginning with a windshield survey to identify all buildings older than 50 years in the area of potential effects. Following concurrence from the Pennsylvania State Historic Preservation Office (PA SHPO), RETTEW evaluated 36 potential historic resources to determine their eligibility for listing…


Check out our latest updates on industry trends, corporate news, employee accomplishments, and community support.

Go to Newsroom


Aspire! Intern Blog: Noah Hakes, Safety Consulting

During my time here at RETTEW, I have developed a lot of useful skills. These skills include things…

Read More


Sign Up for an OSHA General Industry Training TODAY!

Take your safety capabilities to the next level with this General Industry Training in Mechanicsburg, PA, September 16-19….

Read More