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Section 3 <br />Field Data Collection Procedures <br />monitored by the CSU water level monitoring program. Water level data from the <br />remaining 33 wells added to the SPDSS monitoring network will be solicited from <br />cooperating entities and put into a HydroBase-compatible format. Locations of <br />alluvial water level monitoring wells are presented in Figure 2-3. <br />CDM will collect measurements of the depth to water at each well using methods <br />comparable to those currently used by the State during their 2005 spring-season <br />measurements. The measurement date, time, well identification number, measuring <br />point location, casing stickup height, and other descriptive information pertinent to <br />the measurements will be noted and recorded in a field notebook. The procedure for <br />measuring water levels is presented in Appendix B. <br />3.3 Task 39 Surveying <br />Wells in the SEO water level monitoring program that have not been surveyed during <br />Phase 2 for horizontal and vertical control will be identified and prioritized for <br />surveying during Phase 3. A Colorado licensed surveyor using differential GPS <br />methods will be subcontracted to provide horizontal and vertical (elevation) data for <br />the selected wells. The temporary benchmarks at streambed conductance transects <br />will also be surveyed unless CDM and the State determine that data from the CWCB <br />Flood Protection Group renders this activity unnecessary. The elevation data will be <br />used to prepare potentiometric surface maps of the groundwater surfaces in the <br />aquifers that will have a much greater accuracy than previous maps. It is anticipated <br />that up to 80 wells will be surveyed under Phase 3. <br />Horizontal control will be surveyed to 1-foot accuracy and vertical control will be to <br />within 0.1-foot accuracy. Survey results will be reported in NAVD 1983, UTM Zone 13 <br />for horizontal control with vertical control in NAVD 1988. <br />`~ ~ <br />3-6 <br />FINAL SPDSS T33 WORK PLAN &3-OS.DOC <br />