USACE Periodic Levee Inspections

Princeton Hydro was contracted by the U.S. Army Corps of Engineers to perform rigorous Periodic Levee Inspections for the following six levee systems in the Northeast:

• Bennington Roaring Branch Left Bank (NLD System 45050000060) in Bennington, VT
• Pemberwick Byram River Left Bank South (NLD System 4505000019) in Greenwich, CT
• Pemberwick Byram River Right Bank (NLD System 4505000020) in Greenwich, CT
• Holland Patent-Thompson Creek (NLD System 4505000013) in Holland Patent, NY
• Oakwood Beach Right Bank (NLD System 4505000036) in Staten Island, NY
• Borough of Bound Brook Segments U, R-1, R-2, and T (not NLD listed) in Bound Brook, NJ

The purpose of these inspections was to verify proper operation and maintenance, evaluate operational adequacy and structural stability, review design criteria to identify changes in current design standards, identify features to monitor over time, and communicate the overall condition to the USACE Levee Safety Officer.

The inspections consisted of collaboration between geotechnical, civil, mechanical, electrical, and H&H engineering disciplines. Our team inspected over 4 miles of levee systems, which included over 3 miles of levee embankment, 0.6 miles of floodwall, 0.13 miles of channel, 3 pumping stations, 39 interior drainage structures, and 5 closure structures (including 1 tide gate).

Princeton Hydro prepared a Periodic Inspection Report for each of the six levee systems inspected, which included the results of the design criteria review, methods, and results of the field inspection; a summary of areas/items of concern; a preliminary engineering assessment of causes of distress or abnormal conditions; and recommendations for remedial actions to address identified concerns. Final report development included briefing the USACE Levee Safety Officer (LSO) on our inspection findings, assigned ratings, and recommendations.