Reservoir Collapse at Archer City
Following two weeks of excessive rains, the reservoir dam of the Archer City, Tex., water works broke recently. This is the third time this dam has washed out during the year. Besides losing about 70,000,000 gallons of water at the first break it required about $1,000 to repair the dam. At the time the last failure occurred there was approximately 50,000,000 gallons of water in the reservoir. In speaking of the washout, Mayor W. C. Young stated that the dam is about 950 feet long and built across a dry hollow. The material used was mostly clay subsoil but with streaks of 6and. It was built during the winter and a large amount of frozen earth was placed in it at the point which afterwards brolte. The dam was completed during the spring of 1912. The slope was 1 1/2 to 1 on the back side and 3 to 1 on the water side, and the embankment was about 18 feet high in the centre, which was the deepest point. It stood well during the first thirteen months, very little rain falling, and the water in the reservoir was 8 feet deep. During May, 1913, about 4 inches of rain fell one night and before it filled to the spillway the dam broke at the deepest point. Huge frozen clods rolled through the opening. Soon afterwards the gap, which was about sixty feet wide, was closed up and in September a heavy rainfall filled the reservoir to about its former height when the dam went out again at the same place. It was repaired and on November 22 it went out aiain.
Each time it has been repaired especial attention has been given to the bond between the old and the new dirt. The material has been placed in the dam in a damp condition, put in with slips so that the dirt would be properly packed. The accompanying illustrations show distant and near views of washout.