Springs and Surface Water. Nested piezometers at selected springs and regional discharge areas within the Tier I Monitoring Area shall be installed to monitor groundwater levels with the objective of measuring the hydraulic head potential contributing to the spring and/or diffuse groundwater discharge. The Parties recognize that the measured groundwater levels in these piezometers may or may not reflect the actual hydraulic head at the spring orifice, but that the measurements may be used as a surrogate to approximate hydraulic changes due to climate variability or pumping effects. At appropriate sites, these piezometers will be coupled with surface-water gages that shall be installed to measure spring discharge. SNWA and UGS shall work cooperatively to establish monitoring sites at the selected springs and diffuse groundwater discharge areas listed in Table 1.1. The Parties shall share in the capital costs of establishing these monitoring sites as provided for in Table 1.1. Table 1.1. Tier 1 Spring and Stream Monitoring Sites Spring / Stream Name Piezometer Sites Surface-Water Gages Agency Responsible for Installation Agency Responsible for Monitoring Xxxxxx Spring -- 1 UGS UGS Xxxxxx Xxxxxx Spring Complex North Complex 1 -- UGS UGS Xxxxx Salt Xxxxx North Complex 1 -- UGS UGS Xxxxxx Springs Complex Xxxxx Reservoir -- 2 UGS UGS Twin Springs 1 2 UGS UGS Warm Springs at Xxxxx -- 1 SNWA SNWA Xxxx Springs -- 1 UGS UGS Xxxxx Spring -- 1 SNWA SNWA Clay Springs -- 1 UGS UGS Lake Creek 1 SNWA SNWA Big Springs Creek (at Stateline) -- 4 UGS UGS Big Springs -- 1 SNWA SNWA TOTAL 3 15 The Parties agree to cooperate in the data collection and record maintenance for the surface- water sites, including providing access to the measurement sections and gages, and sharing miscellaneous discharge measurements made at each respective site. The TWG will determine the appropriate measurement section at each site and determine the specific flow-measuring device to be installed after field reconnaissance has been performed to determine the optimal arrangement. The responsible monitoring agency will develop rating curves for the gaging stations listed in Table 1.1 using the miscellaneous discharge measurements collected at each site. The TWG will review and approve the rating curves used to compute the discharge records for the respective stations.
