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HYDRO-QUÉBEC
HEMMING FALLS INVESTIGATION AND DEVELOPMENT
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CLIENT
Hydro-Québec
LOCATION
Rivière Saint-François in Drummondville
DURATION
1993-1994
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PROJECT CHARACTERISTICS
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The works were performed in conjunction with Hydro-Québec's operations group. |
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Given the height of the installations, visual surface inspections were conducted using the rappelling technique and climbing equipment. |
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In addition to the underwater inspection, concrete core drilling was also done underwater. |
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Lastly, Casagrande piezometers were installed in the drill holes. |
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SERVICES RENDERED
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Detailed description of the characteristics of concrete surfaces |
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Coring and drilling of concrete elements |
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Underwater inspection |
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Inspection of steel components |
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PROJECT DESCRIPTION
The Hemming Falls installation is located on Rivière Saint-François, at the western edge of the municipality of Drummondville. The Hemming Falls central station was commissioned in the 1920s, and includes six turbine-alternator groups totalling installed power of slightly less than 30 MW.
It is a stream-line central station with 17-metre high falls under normal operating conditions. Hemming Falls was repaired on a number of occasions over the years.
In addition to two embankment dams, respectively located on the left and right banks, Hemming Falls also comprises a number of interconnecting concrete engineering structures, effectively closing off Rivière Saint-François. The installations include, in respective order, a left shutter, a guide bank, weir, spillway, a water inlet (related to a central), as well as a right shutter.
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