Colorado
|
Otero
|
La Junta
|
May 01, 1999
|
Dam Failure, Flood
|
|
|
|
|
"Dikes North of La Junta, Otero County, 1999: A three-day rainfall event occurred on April 29 to May 1, 1999. Heavy rain and saturated soil caused flooding in two major areas along the Front Range, specifically in Northeastern Colorado along the South Platte River and some of its tributaries, and Southeastern Colorado along the Arkansas River and some of its tributaries. Rainfall totals of up to 13 inches were recorded in the Cheyenne Mountain region of Colorado Springs. The La Junta region recorded approximately 8 inches over the same three-day period. The Arkansas River broke the dikes near North La Junta, flooding approximately 200 residences and businesses. The stormwater runoff from the three-day general rain resulted in large flood inundation and erosion in the Arkansas River and Fountain Creek watersheds." - CO Hazard Mitigation Plan 2018-2023
|
|
|
|
Colorado
|
La Plata
|
|
October 06, 2006
|
Dam Failure, Flood
|
|
|
|
|
"La Plata County Levees and Dikes, 2006: In 2006, La Plata County experienced prolonged and heavy rainfall over October 5 and 6. Vallecito Creek overflowed, resulting in flash flooding. Levees and dikes built in the 1970s along the Creek breached on the night of October 6." - CO Hazard Mitigation Plan 2018-2023
|
|
|
|
Colorado
|
Pueblo
|
Pueblo
|
May 07, 2007
|
Dam Failure, Flood
|
|
|
|
|
"Embankment North of Pueblo, Pueblo County, 2007: The area north of Pueblo was inundated by heavy rainfall in early May 2007. On the morning of May 7, an earthen embankment along Fountain Creek failed and 15 structures were flooded. The flooding was not a result of overtopping, but rather structural failure. This embankment was not a certified levee and was not identified on the effective FIRM." - CO Hazard Mitigation Plan 2018-2023
|
|
|
|
Colorado
|
Weld
|
Evans
|
September 09, 2013
|
Dam Failure, Flood
|
|
|
|
|
"Riverside Park Levee, Evans, Weld County, 2013: The Riverside Park levee failed in Evans during the September 2013 flooding. The floodwaters created a 70-foot gap in the levee. The flood put the sewage treatment plant out of operation, leaving residents unable to shower or flush their toilets for over a week." - CO Hazard Mitigation Plan 2018-2023
|
|
|
|
Colorado
|
Morgan, Washington
|
|
June 15, 2015
|
Dam Failure, Flood
|
|
|
|
|
"Morgan and Washington Counties Levee Breach, 2015: On June 15, 2015, a levee breach, about 100 yards wide along the South Platte River, produced farmland flooding over northeast Morgan and northwest Washington Counties. Floodwaters, three to four feet deep, washed out the Union Pacific railroad tracks southwest of Messex. Up to ten inches of water covered several miles of track. Approximately 30 trains per day had to be diverted until the tracks could be repaired and inspected. Washington County Road 58.3 was also washed out." - CO Hazard Mitigation Plan 2018-2023
|
|
|
|
Wyoming
|
Lincoln
|
La Barge
|
September 01, 1964
|
Dam Failure
|
|
|
|
|
"In September 1964, seepage at the newly-built Fontenelle Dam on the Green River near La Barge, Wyoming led to a partial collapse of a 15’ by 20’ section of the dam crest. The downstream town of Green River was on edge for a week and the story made national headlines, but no damage was reported." - WY Hazard Mitigation Plan 2021-2026
|
|
|
|
Wyoming
|
Carbon
|
Baggs
|
May 14, 1984
|
Dam Failure, Flood
|
|
$14,066,200.00
|
$5,000,000.00
|
|
High runoff from melting snow in the mountains of southern Wyoming and northern Colorado. Flooding in the Little Snake drainage burst a small dam, and a 4-foot wall of water poured down the canyon. $5 million of damage to area; damage to water treatment plant, land crops, fences, irrigation systems, structures, livestock, 26 homes and trailers. Runoff estimated at 500-year level.
"The costliest dam failure in Wyoming occurred on May 14, 1984. High runoff from melting snow in the mountains of southern Wyoming and northern Colorado resulted in the failure of the Highline Dam near Baggs. A 4-foot wall of water poured down the canyon. There was an estimated $5 million in damage to the area, including damage to a water treatment plant, crops, fences, irrigation systems, and structures. Four hundred people were forced to evacuate. Twenty-six homes and trailers were damaged. Recovery response was from the Small Business Administration, Civil Defense, Red Cross, and the Army Corps of Engineers." - WY Hazard Mitigation Plan 2021-2026
|
|
|
|
Colorado, Utah
|
|
|
January 01, 2018
|
Drought
|
|
|
|
|
"Gov. Herbert declares drought emergency for all of Utah." An extreme to exceptional drought centered on the 4-corners region began in mid-February 2018 and lasted almost an entire year, with relief from the exceptional drought designation lifting finally in January 2019. Almost the entire states of Utah and Arizona, northern New Mexico, and the southwestern portion of Colorado were under severe, extreme, or exceptional drought designation for much of the year. For the 2018 water year, the USGS stream gage on the San Juan River near Bluff, Utah, (09379500) broke its 92-year record for lowest total discharge, 481.8 kaf (the average has been 2.94 maf). It was the driest water year on record (beginning 1895) for the state of Utah, with 8.07" of precipitation, and in Colorado, it was the driest since 2002 with 12.8" of precipitation. According to the Salt Lake Tribune,16 of Utah’s major reservoirs were less than 20 percent full at the end of water year 2018, prompting the governor to declare a drought emergency for the state that was not rescinded until October 2019." - Salt Lake Tribune
|
|
|
|
Colorado, Utah
|
|
|
May 19, 2020
|
Drought
|
|
|
|
|
In May 2020, extreme drought started in south CO. Over the course of the summer, the south and entire west of the state are affected by extreme drought. In July 2020, pockets of extreme drought start to develop in central UT as well as in central WY. In September, almost all of UT is affected by extreme drought, with pockets of exceptional drought forming. Pockets of exceptional drought form in west CO. In October 2020, pockets of extreme drought also start forming in east CO. Large areas of UT are affected by exceptional drought in October, and in December, almost the entire state is experiencing exceptional drought. In May 2021, the extreme drought areas in WY have disappeared. In November 2021, drought in CO is mostly resolved to non-extreme levels. In December 2021, UT is still experiencing extreme drought in most of the state.
|
|
|
|
Colorado
|
Denver, Adams, Arapahoe, Boulder, Broomfield, Jefferson, Weld
|
|
October 12, 2021
|
Drought
|
|
|
|
|
In October, a pocket of extreme drought develops in northeast CO. This pocket expands and covers several counties in December.
|
|
|
|