29 Projects

Minera Escondida, Organic Growth Project 1, Tunnel 4

Minera Escondida, Organic Growth Project 1, Tunnel 4

Atacama Desert
,
Chile
Project Contacts:

Expansion of the Minera Escondida copper mine included constructing a corrugated steel structural plate arch tunnel. The tunnel acts as a buried bridge to carry a haul road over the mine’s...

Sonoma County Water Agency, Transmission System Pipeline

Sonoma County
,
CA
Project Contacts:

The Sonoma County Water Agency manages a regional water supply to ensure its customers have access to clean water. Wanting to preserve their assets, the agency needed to understand the condition...

Massachusetts Water Resource Authority, Beacon Street Line

Massachusetts Water Resource Authority, Beacon Street Line

Boston
,
MA
Project Contacts:

Constructed in the 1870s, the Beacon Street Line carries water under the MBTA Green Line tracks in the busy Brookline neighborhood. Massachusetts Water Resources Authority (MWRA) identified a leak...

Retaining Wall Failure Investigation

Retaining Wall Failure Investigation

Prescott
,
AZ
Project Contacts:

Shortly after the site was developed, a terraced, mechanically stabilized earth (MSE) wall failed. The MSE wall, with heights up to 63 ft tall, consisted of precast concrete facing panels and soil...

Paramus Park Mall

Paramus Park Mall

Paramus
,
NJ
Project Contacts:

Corrugated metal storm drain pipes running beneath the Paramus Mall parking lot were severely corroded and deflected. SGH investigated the pipes’ condition and developed rehabilitation options...

City of Columbus Pipeline

Columbus
,
OH
Project Contacts:

While attempting to install telecommunications lines below a creek, a driller punctured a buried, 48 in. dia. prestressed concrete cylinder pipe (PCCP). The pipe is part of Columbus’s water system...

Palo Verde Nuclear Generating Station Pipelines

Palo Verde Nuclear Generating Station Pipelines

Tonopah
,
AZ
Project Contacts:

Constructed in the early 1980s by the Arizona Public Service Company, the water reclamation supply system at Palo Verde Nuclear Generating Plant consists of thirty-six miles of prestressed...

Nuclear Station Low-Pressure Service Water System

Nuclear Station Low-Pressure Service Water System

United States
Project Contacts:

The low-pressure service water system comprises 36 in., 42 in., and 54 in. dia. steel pipe. Approximately 1800 ft of pipe was corroded and required repair. SGH designed internally bonded, carbon...

Miami-Dade Water and Sewer Authority

Miami-Dade Water and Sewer Authority

Miami
,
FL
Project Contacts:

In 2010, Miami-Dade Water and Sewer Authority (MDWSA) instituted a continuous inspection and repair program for their 48 in. to 96 in. dia. prestressed concrete cylinder pipes (PCCP). With brief...

Fermi 2 Nuclear Power Plant, Circulating Water Pipeline

Fermi 2 Nuclear Power Plant, Circulating Water Pipeline

Monroe
,
MI
Project Contacts:

The 144 in. dia. circulating water pipeline at Fermi 2 consists of two intake lines between the reservoir and condenser and two discharge lines between the condenser and two cooling towers. All...

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