Lafarge North America application to expand its quarry near Lockport, New York by 9.9 acres within the city limits will require testing of the municipal water supply line from the Niagara River.
The test will verify whether the 110-year-old pipeline can withstand blasting from the stone quarry.
CRA, the engineering firm, handling the test, told city officials Thursday that they generally agree with the scientific analysis by a firm that Lafarge hired.
Greystone Engineering of Saratoga Springs, based on some test blasts and complex calculations, decided that the impact of the blasting in the quarry would be less than the pressure exerted on the 36-inch pipe by the locomotives that rumbled above it for decades.
The pipeline past the quarry on Hinman Road runs beneath what was once an active railroad track.
The city intends to make Lafarge pay any repair costs, as well as the 75 cents per 1,000 gallons that the city would have to pay the Niagara County Water District for backup water.
The aggregate in the 9.9-acre expansion would keep the quarry going for a year, according to Lafarge.
The 110-year-old part of the line is the last three miles closest to the city filtration plant, including the segment that runs past the quarry. The other 10 miles from North Tonawanda have been replaced in the last 30 years.