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An old earthen dam displayed signs of seepage. One state agency wanted to breach and rebuild it immediately, and another agency wanted to repair it. RETTEW was tasked with detecting areas of seepage, soil piping, or erosion of materials beneath the dam. Site conditions were grassy embankments, a concrete spillway, and suspected sheet piles from…
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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….
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Millersville University was in need of a single firm to supply services for various campus projects to enhance campus amenities and create safe, inviting spaces for the school’s students, faculty, and visitors. Under an open-end contract, RETTEW performed various services including: Pucillo Drive: Provided the redesign and relocation of parking areas, sidewalks, and an existing…
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The U.S. Fish and Wildlife Service (USFWS) requested updated topographic mapping of 11,000 acres for future land planning and management. The widely varied terrain and density of vegetation across this large project area required the use of aerial LiDAR because it is the best solution to achieve the appropriate level of detail and accuracy. The…
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Located in South Central Pennsylvania along the Susquehanna River, Lancaster County is more than 950 square miles, with a population of more than 507,000 residents throughout 60 municipalities. The County touts a diverse population with rich agricultural roots, a large Amish community, and a strong sense of history. In this role, RETTEW is responsible for…
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A tetrachloroethylene (PCE) plume is present in the groundwater beneath the northern portion of downtown Casper, the extents of which had been assessed throughout nearly 20 years of site characterization and data gathering. However, the exact source(s) of the groundwater impacts had not been identified. RETTEW collaboratively assisted the Wyoming Department of Environmental Quality (WDEQ)…
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New York City depends on the Catskill Watershed for the majority of its potable water supply. In 1997, the U.S. Environmental Protection Agency issued a filtration avoidance determination to New York City, which required implementing programs such as the Land Acquisition Program and Conservation Easement Program. Under these programs, the City needed to acquire thousands…
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Many Wyoming communities have brownfield properties that are abandoned or underutilized because of known or suspected environmental contamination. The Wyoming Department of Environmental Quality (WDEQ) has established the Brownfields Assistance (BA) program to support these communities by helping local governments investigate, clean up, and reuse brownfield properties. The BA program provides technical assistance through Phase…
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The Pennsylvania Department of Conservation and Natural Resources (PA DCNR) needed a day use facility for visitors to its 780-acre Worlds End State Park, one of PA DCNR’s premier recreational facilities. RETTEW provided engineering services for the construction of four new comfort stations, three new bath houses, one new beach house, new wastewater disposal systems,…
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Tobyhanna Army Depot is the designated site for repairing and testing Marine Corps radars. To accommodate upcoming work on an AN/TPS-59 long-range air surveillance radar antenna, Tobyhanna needed to complete a series of multi-million dollar construction renovations. For this particular project, the government budgeted to equip the depot’s industrial complex with a new radome used…
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Go to NewsroomPenn State Baseball Player Named RETTEW 2023-24 Endowed Scholarship Winner
RETTEW is proud to announce the recipient of the 2023-24 RETTEW Endowed Scholarship for Intercollegiate Athletics at Penn…
Read MoreChesapeake Bay – EPA Settlement Agreement Effects on Pennsylvania’s NPDES Permittees
When the Chesapeake Bay Watershed Agreement was developed, it established goals and outcomes for restoring the Chesapeake Bay, its tributaries,…
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