To complement this, an aqueduct, to convey the Welland River under the new canal alignment, was built. The aqueduct's design is what is known as a four-tube inverted-syphon culvert, long, wide, and extending below the navigation channel. It was constructed from 30,000 cubic metres of concrete. Approximately of new river channel was constructed to route the river into the aqueduct. The creation of the syphon culvert lowered ground water levels for miles around, the project making many dug wells run dry. The St. Lawrence Seaway Authority denied responsibility, but paid many residents to have a drilled well installed to supply their water. (based on local witnesses)