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Last modified
1/26/2010 12:56:15 PM
Creation date
10/12/2006 12:27:17 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8278.200
Description
Title I - Wellton-Mohawk
Basin
Colorado Mainstem
Date
1/1/1978
Author
WM I&DD
Title
Wellton-Mowhawk Irrigation and Drainage District - District Overview
Water Supply Pro - Doc Type
Publication
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<br />FLOODS <br /> <br />As previously mentioned, there were damaging Gila river floods <br />in 1862, 1891 and 1916, Lesser flood flows were experienced in 1921, <br />192.3, 1931, 1932 and 1941. In 1959 the Corps of Engineers completed <br />Painted Rock Dam, an earthfill structure northwest of Gila Bend and <br />66 miles upstream from Texas Hill. It is 181 feet high and has a capacity <br />of 2,492,000 acre feet at its spillway level. It has been very beneficial <br />to this District,on two occasions, 1966 and 1973: <br /> <br /> 1966 1973 <br />Elevation Spillway 661.0 <br />Elevation Maximum Water 585,90 601.64 <br />Elevation Streambed 530,0 <br />Inflow 255,000 af 67:3,000 af <br />Maximum Contents 215,900 af 446,520 af <br />Maximum Release 2850 cfs 2830 cfs <br />Maximum Inflow into <br />this District 1208 cfs 1680 cfs <br />Pumped into Mohawk Canal <br />at N orton Siphon 16,000 af 12,000 af <br />Left in the District <br />underground 47,400 af 53,450 af <br /> <br />The Corps' criteria for releases from Painted Rock called for release <br />of 2500 cfs so as to evacuate rather quickly in order to be ready for <br />another equal or greater inflow. However, because of probable damage <br />to this District and to the two districts downstream, most releases were <br />less than 2500 cfs, <br /> <br />In 1973, at the request of people of Gila Bend so as to have a <br />recreational lake and at the request of this District to stop adding to <br />the underground, no releases were made after the reservoir dropped <br />to 200,000 af on October 29, Thereafter evaporation did the rest, <br /> <br />Damage to this District in 1966 and 1973 was in the form of closed <br />county roads and increase of the underground reservoir with resultant <br />waterlogging of land and a build-up of salts on the surface and addi- <br />tional pumping, <br /> <br />In 1966 it required one year for the District's drainage pumps to <br />get the groundwater table back to normal after the inflow; in 1973 <br />it required three and a half years to get it to a new normal created <br />by increased acreage which in turn was created by an improved market <br />for agricultural products during the period 1974-76. <br /> <br />~ <br /> <br />"1 <br /> <br />I <br /> <br />18 <br /> <br />I. <br />II <br />
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