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Hydrology and Hydraulics


Orange County Department of Public Works

Goshen, NY

Our office was selected to provide civil and environmental engineering service to determine injection well and industrial stormwater compliance at various facilities owned and operated by the County of Orange. This work was performed in conjunction with the U.S. Environmental Protection Agency's (USEPA) Underground Injection Control Program (UIC) as it relates to floor drains at all county facilities. In addition, all county properties were reviewed for compliance with Stormwater Discharge Associated with Industrial Waste Which Discharge the Waters of the United States. This is an ongoing program by the New York State Department of Environmental Conservation and the USEPA stemming from the Clean Water Act.


National Flood Insurance Program

NY and NJ

Under contract to the Federal Emergency Management Agency (FEMA), provided detailed engineering analysis to prepare the nation flood insurance mapping for various communities in New York and New Jersey. Assignment was to develop peak rates of run-off and computer modeling.


Monshop Properties

Monroe, NY

Analysis and revision of flood insurance study to remove commercial property from the requirement of having flood insurance. The assignment consisted of detailed analysis of hydrology and computer modeling (HEC-II). Application was made to FEMA for a Letter of Map Revision (LOMR). This application was granted with a savings of $35,000 over the life of the mortgage.


Orange County Department of Public Works

Goshen, NY

Hydraulic modeling of the Lake Street Bridge over Mill Pond, Monroe, NY. The county was replacing this bridge with a new structure and because the bridge was in the flood plain of the Ramapo River, a detailed map was necessary to size the bridge to pass the 100 year return period storm. Detailed HEC-II modeling was prepared to justify the sizing.


Homestead Village

Warwick, NY

This property was re-studied utilizing detailed mapping in which FEMA re-issued the flood insurance panel as a map revision. As a consequence, the homeowners' insurance rates dropped considerably.


Mill Pond Dam

Park Ridge, NJ

Hydrologic and hyraulic analysis for a dam-break model for the Mill Pond Dam located in Park Ridge, New Jersey. Additional studies consisted of rerunning the HEC-II model to ascertain water surface elevations directly downstream of the dam. The spillway study requested a reduction in the Spillway Design Flood (SDF) to 80% of the rated capacity. Review of the inundation maps convinced the NJ Department of Environmental Protection to accept the waiver.

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Last modified March 2012