Projects

The status quo is not good enough—that was the driving force behind the Nassau County Department of Public Works (NCDPW)’s initiative to update the grit removal system at its Bay Park Sewage Treatment Plant (STP). Placed into operation in 1986, the existing system included three detritor tanks containing a complex...

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The dormitory-style troop training quarters for the Pennsylvania Air National Guard 193rd Regional Support Group is located at the Fort Indiantown Gap National Guard Training Center. It is one of many World War II-era facilities at the center that were not designed for post-9/11 security and environmental standards. The client...

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This fast-track, design-build assignment included 28 buildings in support of U.S. military and Afghan security forces in Afghanistan. Facilities included two vehicle maintenance facilities, a vehicle refueling point building, three administration buildings, three warehouses, generator building, laundry building, medical clinic, gym, dining facility, maintenance building, fire station, and guard facilities....

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The Bay Park Sewage Treatment Plant was constructed in 1949, with major expansions and upgrades during the 1960s and 1980s. The current permitted capacity is 70 mgd, although current average daily wastewater flow is 50 mgd. The plant serves a population of approximately 550,000.  The Nassau County Department of Public Works...

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When the Show-Me State’s 120-year-old Blendville Water Treatment Plant (WTP) needed an upgrade to handle increased demands predicted in 2006, Gannett Fleming designed facility upgrades featuring engineering firsts. Expanded from 16 mgd to 21.5 mgd, the modern Blendville WTP includes eco-friendly treatment technologies achieved through a collaborative design-build effort. Our design...

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With a growing student population and a need for improved educational facilities, Bowie State University turned to Gannett Fleming to provide stormwater management solutions for the expanding campus. As part of a major capital improvement program involving the design and construction of a new fine and performing arts center, the...

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Located east of Florida’s Tampa Bay area, the 15.5 billion gallons C.W. Bill Young Regional Reservoir is a critical resource for its owner Tampa Bay Water and the more than 2.4 million customers it serves. Helping ensure the region’s drought resistance and minimizing reliance on depleting groundwater sources, surface water...

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In the heart of midtown Harrisburg, Pennsylvania, the LEED Gold certified Campus Square building shines as an example of urban revitalization and a commitment to sustainable design and construction methods. The area was transformed from an urban brownfield site with nine contaminated underground storage tanks into one of the greenest...

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After record flooding occurred in 1996, New York City’s 1,324-foot-long Gilboa Dam spillway was found to be a safety hazard. Completed in 1927, the dam’s masonry was deteriorating from decades of freeze-thaw and spillway overflow. It holds approximately 20-billion-gallons of water and provides 16 percent of New York City's water...

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Center Hill Dam provides flood control, navigation, hydropower, recreation, water supply, and water quality benefits. Because of its highly solutioned limestone foundation and rims, seepage problems have plagued the Center Hill Dam since the first test filling of the reservoir. Cavernous features are known to exist at the site, and...

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Center Hill Dam provides flood control, navigation, hydropower, recreation, water supply, and water quality benefits. Because of its highly solutioned limestone foundation and rims, seepage problems have plagued the Center Hill Dam since the first test filling of the reservoir. Cavernous features are known to exist at the site, and...

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Center Hill Dam provides flood control, navigation, hydropower, recreation, water supply, and water quality benefits. Because of its highly solutioned limestone foundation and rims, seepage problems have plagued the Center Hill Dam since the first test filling of the reservoir. Cavernous features are known to exist at the site, and...

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The existing Southwest Delaware County Municipal Authority (SWDCMA) Wastewater Treatment Plant was constructed in the 1970s and would have required costly capital improvements to comply with new effluent requirements set forth by the Pennsylvania Department of Environmental Protection. As part of Delaware County Regional Water Quality Control Authority’s (DELCORA) Act...

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A confidential rail client retained Gannett Fleming to design and install a stormwater collection system at a rail-to-ship transfer facility where coal fines were falling off or being blown off the transfer system. Recognizing that the fines had the potential to cause an adverse impact to the stormwater that would...

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Mon Valley Sewage Authority (Authority) worked with Gannett Fleming to implement the projects and recommendations of their combined sewer overflow (CSO) long-term control plan (LTCP) that the Pennsylvania Department of Environmental Protection approved in May 2008. The LTCP is intended to improve water quality for the community by limiting CSO. The...

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A critical component of the largest public transit expansion program in the U.S., the Crenshaw/LAX Transit Corridor Project will create a new LA Metro light rail line serving the communities of Crenshaw, Inglewood, and Westchester, as well as the Los Angeles International Airport. The project includes the construction of underground...

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A confidential client requested a modified due diligence study of existing data, reports, and other pertinent and available documentation of an open pit polymetallic mine. The purpose of the study was to determine whether the recoverable tonnage would meet the promised criteria on a consistent basis. Determining the probability of...

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A Grouting Production Program was conducted at the Eagle Mine Humboldt Tailings Disposal Facility in Marquette County, Michigan. The purpose of the production program was to mitigate seepage in the glacial soil deposits contained between an existing soil bentonite wall and the underlying quartzite bedrock foundation.

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To increase drinking water system capacity and improve service reliability for approximately 18,000 customers in the Ellwood City area, Pennsylvania American Water (PAW) made its largest infrastructure investment ever in northwestern Pennsylvania. The $50-million Ellwood Water Treatment Plant and raw water intake/pumping facilities in Lawrence County replace a 100-year-old facility,...

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In 2005, a sinkhole developed on the upstream side of the Clearwater Dam, which is owned by the U.S. Army Corps of Engineers (USACE) Little Rock District. The USACE concluded during the Phase I contract that a more intense grouting program would be required to reduce permeability of the foundation...

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