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Show Flood Flow Situation Periodically uncontrolled flood flows cause damage along the Duchesne, Provo, Spanish Fork, and Jordan Rivers. Some of the flows from Provo and Spanish Fork Rivers find their way to Utah Lake, causing damage along the lake perimeter due to the increase in water surface elevation. Some floods on the Provo River result from snowmelt originating above Deer Creek Reservoir when the reservoir is full. Since Deer Creek Dam was completed in 19^- 1 flooding due to snowmelt has occurred along the Provo River below the dam in 1952 and 1957• The largest snowmelt flood recorded below Deer Creek Dam occurred on May 6, 1952, with a peak flow of 2,520 c. f. s. Prior to the construction of Deer Creek Dam numerous snowmelt floods occurred along the river. In May of 1920 an estimated $ 50,000 in damage was caused by flooding in the beet fields and homes adjacent to the river in Provo. Snowmelt runoff is the source of most floods along the Jordan Valley. The flood of April- May 1952 was the largest and most damaging snowmelt flood of record on streams in Salt Lake City. Approximately 1,200 acres of residential, industrial, and commercial area were flooded, causing an estimated $ 1,930,000 damage. Most of the flood runoff originated on Red Butte, Emigration, and Parleys Creeks. Monthly volumes for these two months were nearly 350 percent of average volumes. The outflow from Utah Lake also contributed to the flood problem. The lake was 3.28 feet above compromise level and a peak flow of l, Ul0 c. f. s. was recorded in the Jordan River Narrows on June 10, 1952, as compared with an average discharge of 365 c. f. s. The areas which were most heavily damaged by flooding around Utah Lake in 1952 were agricultural lands located adjacent to Provo Bay and between Provo Bay and Lake Shore. Estimated damages between Utah Lake and Springville on the Hobble Creek drainage were $ 105,000 resulting from a peak flow of 1,250 c. f. s. on May k, 1952, compared to a 60 c. f. s. average flow. Estimated damages on the Spanish Fork drainage between Utah Lake and the mouth of Spanish Fork Canyon were $ 600,000 resulting from a peak flow of 3,020 c. f. s. on April 28, 1952, compared to a 90 c. f. s. average flow. About 710 acres were flooded below Springville and about ^, 300 acres were flooded below Spanish Fork Canyon. v The largest flood of record on Strawberry River occurred on May 7S 1952, with a peak discharge of 3,^ 90 c. f. s. During this flood about 9 blocks in the southeast part of Duchesne were flooded. Damages with a flood of this magnitude were estimated to be $ 1+ 0,000. 198 |
