Laserfiche WebLink
4. On water table hydrographs, Bob Longenbaugh asked what factor is responsible <br />for anomalies in the water surface in the Fort Morgan area, where Bob saw <br />significant lowering in 2003 measurements. <br />Bob Longenbaugh indicated the need for both fall and spring measurements in <br />alluvium. The fall measurements show lots more variability. He felt that fall <br />measurements better reflect the impact of well pumping and surface water <br />application, and that water levels in the aquifer have returned to steady state by <br />spring. He felt that fall measurements are absolutely critical for model <br />calibration. There are charts available in CSU database that could be obtained <br />from Bob's work that will give fall water level data. These statements are valid <br />for area below the highest ditch. It is important to get these data. Bob wants the <br />anomaly of the deep hole near Wiggins explained. It's a very different situation <br />above the highest ditch. These concerns need to be incorporated into the <br />modeling. <br />6. Bedrock Aquifers <br />a. Bob Longenbaugh suggested that the bottom and top elevations for the <br />aquifers be shown on the hydrographs. <br />b. Courtney Hemenway expressed concern about the need for information <br />about the condition of each of the wells that were included in the database <br />for the bedrock: e.g., when was the well pumped, condition of the well (i.e., <br />is the condition of the well contributing to the measurement of water level <br />data?). Courtney recommends the State put in non-pumped wells, i.e., <br />monitoring wells that are not influenced by pumping or age. Gordon <br />McCurry noted that Phase 3 includes a task to install data loggers in four <br />monitoring wells to partially solve this problem. <br />c. Question about conclusion that alluvial water level data are sufficient for <br />modeling. Willem and Bob Longenbaugh questioned this. Bob again <br />questioned how the water level fluctuations near Wiggins would be <br />accounted for in the modeling. <br />d. Bob Longenbaugh questioned the water level contours for the alluvium, <br />because they did not take into account the canals and local water features. <br />Rick McLoud talked about the importance of this data for public <br />understanding of water level reductions in the bedrock aquifers. He is <br />looking for help in determining the "real" reduction in water levels. Rick <br />wants data in the bedrock aquifers that can be relied on by policy makers. He <br />feels that there is confusion over water levels, but water levels may not be the <br />best parameter to compare. It's hard to get static bedrock water levels, <br />because many of the measured wells never stop pumping completely, and <br />there's always well-to-well interference. Maybe well yield is the parameter to <br />answer the question of what's going on with bedrock groundwater. <br />£ This question of what's happening to the Denver Basin is an area that could <br />benefit public education. There's lots of politics here. The information from <br />this process could assist in the public education about the Denver Basin. <br />Rick McLoud indicated the need to look at well production. Courtney <br />11 <br />