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Flood of JUnE! 1891. A dam failure in the upper basin washed out the stream gage so no accurate-discharge could be determined. The peak discharge was later estimated from a high water marK to be 21,000 cubic feet per second. Flood of 21 Mav 1904. Flooding in the study reach on 21 May 1904 resulted from rains of "cloudburst intensity" in the foothills at about 7,000 feet elevation during a period of rapid snowme~ on the headwaters of North Fork and Boxelder Creek. Rainfall of 2.66 inches was recorded in the North Fork area. A peak discharge of 20,000 cubic feet per second was estimated at Livermore on the North Fork, and a peak discharge of 7,500 cubic feet per SllCOnd was estimated on Boxelder Creek near its mouth. Fortunately, rainfall in the lower basin was moderate with only 0.21 inches recorded at Fort Collins and only 0.09 inches recorded at Greeley, or this flood might have been of even greater magnitude. Damage was heavy at Fort Collins and Boxelder Creek, downstream from Fort Collins, contributed high flows. The Greeley Tribune stated: "The Boxelder, a small stream ordinarily only a few feet wide, was tBaring down through a fertile valley filled from bluff to bluff with a sheet of water a mile wide, carrying buildings and bridges away Below the mouth of Boxelder Creek floodwaters were reported to be 1.5 mile wide in places. Every b~idge between Fort Collins and Greeley was destroyed. The flood reached Fort Collins late in the afternoon on 20 May and the crest arrived at Greeley about 8:30 a.m. on 21 May. Water backed up behind a culvert at the Union Pacitic Railroad track and overflowed a large area in the city. LowlandS downstream of the railroad were also flooded with houses submerged to the windowsills. Flooding continued until noon, then receded rapidlyc Total damages for the-basin were estimated at $183,650 including $1,000 at Greeley and ~;33,000 for crops and livestock. Flood of 24-:16 June 1917. The flood of 1917, reported greatest near Greeley, was caused by rain falling on a heavy snow blanket in the mountains and supplemented by local rains in th,e lower portion of the basin. The county surveyor estimated a peak discharge of 13,000 cubic feet per second near Greeley, but the peak at the Greeley gage near the mouth of the stream was 4,240 cubic feet per second on 25 June. Total damages for the basin were estimated at $19,000 with $3,000 at Greeley. Flood of 10-18 June 1923. Snow cover in the basin was about 50 percent above normal in the Spring of 1923 and June was one of the wettest of record. Flooding along the Poudre caused $132,500 in total damages in the basin including $5,000 at Greeley. The Fort Collins Express, 17 June 1923, in a dispatch from Greeley stated: "The water on the Poudre second only to the flood of 1904, tonight shut off all travel on highways north and west of the city and had driven a score of families from their homes on the lowlands . . . Three feet of water has driven tourists from their campground in the bottoms. The Boyd farm northwest of here was entirely under water for the first time since 1884". l . Flood of May 1930c Rains began in the basin about 3 p.m on 30 May 1930 and a peak discharge of 6,800 cubic feet per second, at a stage of 9.82 feet, was reached at Livermore on thll North Fork the Cache la Poudre River at 6 p.m. The flood reached the canyon gage in the Cache la Poudre River at 8:15 p.m., with an estimated discharge of · 10,200 cubic feElt per second at 7.9 feet gage heightc The flood reached Fort Collins at Colorado Flood Hydrology Manual 4.20 ffitFf '!