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<br />~ <br />- <br />L'" <br /> <br />,~ <br /> <br />DATA COLLECTION REPORT <br />FOR THE <br />SAN MIGUEL PROJECT WATER SUPPLY STUDY <br /> <br />Introduction <br /> <br />This report summarizes data collection efforts conducted as a follow up to Phase 1 of the San <br />Miguel Project Water Supply Study, Investigations were focused on obtaining' information <br />regarding cropping patterns, irrigation practices, soils, headgates and distribution ditches, <br />and ownership of ditch company shares in the Norwood-Redvale area. <br /> <br />The work was done at the request of the Farmers' Water Development Company (Gurley) <br />and the Lone Cone Ditch and Reservoir Company (Cone) by Boyle Engineering Corporation <br />under the sponsorship of the Colorado Water Conservation Board (CWCS) with assistance <br />from the Bureau of Reclamation, the San Miguel-West Montrose County Extension Office, the <br />Soil Conservation Service (SCS) , and representatives of the ditch companies. The <br />information obtained from the investigations will be used in subsequent analyses to develop <br />recommended operating plans for the Gurley and Lone Cone reservoirs, <br /> <br />Data Types and Collection Methods <br /> <br />Data collection methods involved interviewing land owners, share owners, and irrigators to <br />determine ditch company share ownership, irrigated acreage under production, crops grown, <br />and irrigation methods in use in the study area. Interviews were conducted in Norwood <br />between September 11 and September 18, 1989. To aid in the interview process, an on-farm <br />irrigation practices questionnaire was developed which provided a means for consistent <br />recording of responses to questions. Figure 1 shows a sample questionnaire, Specific <br />information obtained from individuals interviewed included: <br /> <br />o Irrigation application method <br />o Acres under each method <br />o Location of land <br />o Crops grown <br />o Water source (Gurley or Cone) <br />o Duration of application in free water and storage water periods <br />o Rate of application in free water and storage water periods <br />o Interval between application in free water and storage water periods <br /> <br />Individuals were asked whether they changed" operating methods during storage water <br />periods when releases from Gurley Reservoir are controlled, compared to free water periods <br />when releases are not regulated. The vast majority of irrigators did not significantly vary <br />application rates, set times, or cycle times from free water periods to storage water periods, <br />therefore, separate fields in the database were not maintained for free and storage water <br />periods. <br /> <br />Similarly, individuals were asked to distinguish different application rates, set times, and cycle <br />times for the average, wet, and dry water supply conditions, Variations in methods were <br />mostly indistinguishable, therefore, the rates and times in the database are considered to be <br />for the average water supply condition, <br /> <br />1 <br />