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surveyed, more accurate groundwater fluxes can be calculated during the Phase 4 Task 48 <br />groundwater modeling. <br />6.0 Recommendations <br />Below are reconmlendations from the activities performed under Task 39, for consideration <br />during future water level data collection: <br />^ Continue to collect autunul water levels from the DWR water level monitoring network to <br />assess seasonality in aquifer water levels, with a focus on wells that appear to be less affected <br />by localized pumping or other influences (Table 2). <br />^ Identify and instrument additional wells wit11 continuous recorders. These wells should be <br />observation wells, abandoned wells or wells that are no longer in use so t11at localized <br />pumping effects are minimized. Candidate wells include alluvial wells currently measured <br />by fl1e DWR, Metro Wastewater Reclamation District, Colorado Air National Guard, and <br />USGS sites included in the AgLUS and NAWQA well monitoring programs. The <br />instrumented wells should target aquifers which are underrepresented in Table 2, <br />specifically the Arapahoe and Dawson aquifers. Monitoring of the aquifers should be for at <br />least several years, until long-term and seasonal trends can be determined. These additional <br />continuously-monitored wells should be added to fl1e DWR monitoring network. <br />^ The DWR should continue to solicit water levels and CDM should stop its solicitation to <br />avoid duplication of effort. The DWR should request monthly measurements in its annual <br />solicitation if such data are collected. <br />^ Continue coordinating with DWR staff conducting spring water level measurements to make <br />well owners aware of the SPDSS autumn data collection process and thus increase the <br />number of positive responses for autumn measurements. <br />^ Add wells to the water level monitoring network >11 areas of aquifers where there are <br />currently no wells, to gain better understanding of both long-term and seasonal water level <br />trends. <br />^ Evaluate well screen and well sensing intervals for any new bedrock wells that maybe <br />incorporated into the DWR water level monitoring network so the water levels can be <br />attributed to a specific aquifer or aquifers. <br />^ Maintain documentation of wells in the DWR water level monitoring network, including <br />accurate well location maps, addresses, contact information, and other pertinent information <br />for water level data collection. <br />^ Continue collecting 1lourly water level data at the data-logger-equipped SPDSS alluvial and <br />bedrock monitorng wells and download these data two times per year. Downloaduzg the <br />data more frequently t11an during P11ase 3 is an expansion of the program but is warranted to <br />mininuze gaps in data collection or systematic drift i11 readings associated with equipment <br />malfunctions, as occurred in isolated cases during Phase 3. It is anticipated that this will be <br />undertaken by the SPDSS Grotmdwater Contractor during fl1e upconung Phase but will be <br />transitioned to the DWR as part of their ongoing monitor>11g program. <br />^ Continue to evaluate the drift in the data loggers on an annual basis and plan to periodically <br />re-calibrate the data loggers as needed, by SPDSS contractors and later by DWR staff. <br />SPDSS Phase 4 Task 39 Technical Memorandum-Final 23 <br />O~i20%2008 <br />