Dam At Lawrence

-The dam at this place is to be 900 íeet long, 20 feet high, nnd 2f) feet wicie - equal lo 585,000 cubic feet. Allowing a cubic foot to weigh 167 pounds, the weiglit of ;he dnm will be 97,695,000 pounds, or about 48,857 tons. Allowing a four-horse team to draw 8 tons ol slone per day ÍYom tlie quarry to the dnm, it would require upwnrds of 6100 days, o i nearly 20 years to draw the stone of which this structure is composed.-