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A project task funded by SPDC was replacement of the G2 flume. The previous flume <br />was a trapezoidal flume constructed of sheet metal. The trapezoidal flume lacked lateral <br />support members and over time the sides had been pushed in to the point where <br />calibrations for the "as- fabricated" cross sectional geometry were no longer valid. <br />Additionally, backwater effects on the trapezoidal flume resulted in it operating under <br />excess submergence at flow rates commonly encountered at the site. A new ramp -type <br />long throated flume was constructed at G2 in September of 2007. Figure 3 shows the <br />completed installation at the new G2 flume. <br />Figure 3. New Ramp -Type Long - Throated Flume at the SPDC G2 Site <br />During 2008, radio /control equipment was installed at additional recharge sites on the <br />SPDC recharge system and at one site on the J & E recharge system. A new base unit <br />was installed at the Lower South Platte Water Conservancy District (LSPWCD) office in <br />Sterling CO. CDI radio /control units were also installed on four J & E alternate point of <br />diversion wells. At all recharge sites, redundant recording devices are in place. <br />At the SPDC main flume and the J & E recharge site, Sutron Stage & Discharge Recorder <br />(SDR) units are installed. At the remaining SPDC recharge sites, Stevens type F chart <br />recorders are installed. Both the Sutron SDR units and the Stevens type F recorders <br />utilize float and pulley type level sensors. In an effort to minimize variability between <br />recording technologies, multi -turn potentiometers were installed on the Sutron and <br />Stevens equipment to serve as level sensors for the CDI radio /control units. <br />Each of the J & E alternate point of diversion wells was already equipped with <br />McCrometer propeller meters. In order to provide electronic input signal for the CDI <br />radio /control units, pulse output modules were installed on the McCrometer meters. <br />Translation of pulses into flow rate was calibrated by starting with a McCrometer- <br />0 <br />