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Section 785.19 (c) Continued. • Flood Irrigation. Historical records of flood irrigation in Eckman Park are poor, but the Routt County Water Commissioners Office con- firms that there has been no active flood irrigation in the area for at least twenty years. A poorly maintained group of stock ponds and ditches known as the Eckman Park Reservoir and Ditch System still exists and is shown as Reservoir 1, 2 and 3 on the Twentymile Park Hydrology (Map 6 ). The abandoned ditches were apparently used for water transfer between ponds and limited irrigation on the grassy slopes. Reservoir No. 1 of this system is located in a different watershed from the study area. Although no records of consumptive use are available from the Routt County Water Commissioners Office, the pond and ditch system was appar- ently used only for stock watering in the early 1900's and was abandoned for reasons of poor water quality and availability. The water rights to this sytem have been acquired by Energy Fuels and storage rights will be transferred to Sedimentation Pond A planned • in Eckman Park (See Section 780.21 for further discussion of water rights). Sub-Irrigation. In order to evaluate the possibility of sub- irrigation from ground water in the study area, a system of 28 shallow wells was installed to form transects crossing the valley at 7 locations. The wells were installed in backhoe pits to facilitate soil sampling and detailed logging of unconsolidated materials, and were constructed with perforated PVC casing to enable water monitoring and sampling. The logs of the backhoe pits are presented in Exhibit 8, Drill Hole Logs. No soil mottling or other evidence of periodic ground water fluctuation into the root zone was observed. Lithologic data from these logs were used in the Eckman Park Stream Channel Cross Sections (htap 51). With the exception of a few isolated sand and gravel deposits, the channel fill is predominately tight, sticky clay. n LJ 785-11