Hydroelectric Project Underwater Inspections

Project: Robert Moses Niagara Power Plant
Features: Inspections of Trash Racks, Draft Tubes and Associated Structures

Summary of Scope of Services
The Niagara Power Project, located about 4 1/2 miles downstream of Niagara Falls, consists of two main facilities: the Robert Moses Niagara Power Plant and the Lewiston Pump-Generating Plant. The water intakes for the plants on the U.S. side of the river are located approximately 2.5 miles upstream of Niagara Falls. Two 46-foot by 66-foot underground conduits transmit the water a distance of four miles, under the City of Niagara Falls, to a common forebay connecting the two facilities.

The Robert Moses Hydroelectric Power Plant consists of a concrete gravity dam, 13 concrete encased steel penstocks, with thirteen 150 MW vertical Francis turbines that discharge into the lower Niagara River through three-bay concrete elbow draft tubes. The Lewiston Pump-Generating Plant has concrete gravity dam and twelve 20 MW pumpturbines.

ATSI directed underwater inspection activities of the trash racks, draft tube and associated structures. These services included: monitoring diving observations and data collection; inspections of above-water features; and preparation/quality control for the inspection report.

Services Provided

• Trash Rack Inspection
• Intake Structure Inspection
• Concrete/Steel-Lined Draft Tube Inspection
• Steel Bulkhead Gate Inspection
• Preparation/QC of Inspection Report

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