Repair and Rehabilitation
Design

Forensic Engineering/
Failure Investigation/
Collapses

Environmental Structures

Building Facades/
Curtain Walls

Parking Structures

Special Structures

Structural Engineering/
Design

Roofs, Plazas and Waterproofing

Formwork Analysis Design/Shoring-Reshoring Analysis

Foundations and
Geotechnical Investigation

NORTH RIVER WATER POLLUTION CONTROL PLANT
New York, NY

WATER TANK,
ALBERTSON WATER DISTRICT
Albertson, NY

WATER TANK,
WESTBURY WATER DISTRICT
Westbury, NY

WARDS ISLAND WATER POLLUTION CONTROL PLANT
New York, NY

BALDWIN WATER
TREATMENT PLANT
Cleveland, OH

NEVERSINK TUNNEL OUTLET STILLING CHAMBERS
Grahamsville, NY

The Neversink Tunnel Outlet Stilling Chambers, were designed and constructed in the late 1940's to early 1950's. The stilling chambers are massive underground concrete structures used to reduce the high water pressures for the New York City water supply. As a result of a grout patch failure at the lower chamber, the New York City Department of Environmental Protection requested the firm of Hazen and Sawyer, P.C. (H&S) to evaluate the structural integrity of the stilling chambers. H&S retained the services of Feld, Kaminetzky & Cohen, P.C. (FKC) to evaluate the concrete condition, strength and durability. FKC performed concrete core testing and non-destructive testing such as half-cell testing, impact-echo testing, and magnetic detection of rebars.