Buried Infrastructure
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Rehabilitation of the Greenmount Branch Interceptor System for Baltimore included pipe bursting, sliplining, and microtunneling.
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The 3-mile-long ocean outfall from the Virginia Key Central District WWTP (FL) had to remain in operation during construction of upgrades and maintain maximum hydraulic capability during wet weather.
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In Sarasota, we installed this 20-inch sewer main along Gypsy Street as part of the Lockwood Ridge Road force main, which allowed for the interconnection between the South Gate Advanced WWTP and the Gulf Gate Advanced WWTP.
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We used closed-circuit television, laser profile, H2S gas, and Sonar inspection data to facilitate development of repair/rehabilitation recommendations for 15,000 lf of sewer mains in the City of Richmond (VA), a project complicated by access issues stemming from the right-of-way of the CSX railroad, I-95, and the close proximity to the James River.
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As part of the Solids/Floatables Control Plan adopted by the City of Camden, Gloucester City, and the Camden County Municipal Utilities Authority, we designed in-line netting technology to screen ½” solids and floatables for 16 outfalls in Camden City.
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This 120-inch line, combined with the existing 60-inch and 54- inch pipelines, will provide 330 mgd of raw water to the Franklin and Vest Water Treatment Plants.
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We designed and oversaw construction of the Upper and Harrisburg Rocky River Interceptor Sewer Lines in Cabarrus and Mecklenburg Counties, which were installed along the Rocky River and required several river crossings, many 54-inch through 96-inch tunnels under major highways and railroads, and multiple gas and fiber optic line crossings. We also provided all environmental permitting on this project.
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Rehabilitation of the Greenmount Branch Interceptor System for Baltimore included pipe bursting, sliplining, and microtunneling. -
The 3-mile-long ocean outfall from the Virginia Key Central District WWTP (FL) had to remain in operation during construction of upgrades and maintain maximum hydraulic capability during wet weather. -
In Sarasota, we installed this 20-inch sewer main along Gypsy Street as part of the Lockwood Ridge Road force main, which allowed for the interconnection between the South Gate Advanced WWTP and the Gulf Gate Advanced WWTP. -
We used closed-circuit television, laser profile, H2S gas, and Sonar inspection data
to facilitate development of repair/rehabilitation recommendations for 15,000 lf of sewer mains in the City of Richmond (VA), a project complicated by access issues stemming from the right-of-way of the CSX railroad, I-95, and the close proximity to
the James River. -
As part of the Solids/Floatables Control Plan adopted by the City of Camden, Gloucester City, and the Camden County Municipal Utilities Authority, we designed in-line netting technology to screen ½” solids and floatables for 16 outfalls in Camden City. -
This 120-inch line, combined with the existing 60-inch and 54-
inch pipelines, will provide 330 mgd of raw water to the Franklin
and Vest Water Treatment Plants. -
We designed and oversaw construction of the Upper and Harrisburg Rocky River Interceptor Sewer Lines in Cabarrus and Mecklenburg Counties, which were installed along the Rocky River and required several river crossings, many 54-inch through 96-inch tunnels under
major highways and railroads, and multiple gas and fiber optic line
crossings. We also provided all environmental permitting on this project.
Beneath our towns and cities lay billions of dollars’ worth of underground infrastructure. Much of this infrastructure was built many decades ago, and is reaching a point of dangerous deterioration. Hazen and Sawyer has an established track record of assessing and rehabilitating or replacing aging buried infrastructure, and in designing repairs and improvements.
Studies have shown that it costs 3 to 4 times more to repair critical pipes after they fail than to rehabilitate them at the first signs of deterioration. Pipes in poor condition are very vulnerable to increased infiltration and inflow, resulting in possible sewer system overflows (SSOs) and further acceleration of pipe failure. These conditions threaten public health and the environment, along with the economic stability of the service provider.
Hazen and Sawyer can assess your risk and develop the strategy that best addresses your challenges. We have provided innovative, informed, responsive service to hundreds of buried infrastructure projects – mitigating the risk of adverse impacts caused by aging, failing infrastructure. We combine top technical know-how with an asset management-based approach to provide cost-efficient service that meets our clients’ near and long-term needs.
We provide expertise in:
- Sewer and manhole condition assessment (PACP/MACP)
- Flow monitoring/I&I studies
- Pressure main (water and wastewater) assessment
- Gravity and pressure pipe rehabilitation/replacement
- Manhole inspection and rehabilitation
- Valve exercise programs
- SSES activities (CCTV inspection, and smoke and dye testing)
- Trenchless and traditional new pipeline installation
- Asset valuation
- Hydraulic modeling
- Unaccounted-for water studies
- Private sewer lateral assessment and rehabilitation
- Hydrant flow tests
Balancing the need to rehabilitate or replace aging buried infrastructure with the cost of doing so can be complicated. Hazen and Sawyer can make it easier. We combine technical skill, experience, and resources into a cost-effective approach that maximizes service and minimizes extraneous delays and costs. The result is reliable underground infrastructure, now and for years to come.
For inquiries contact: Sean Fitzgerald, P.E. at .(JavaScript must be enabled to view this email address)