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C150227 approval ltr
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C150227 approval ltr
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Last modified
3/8/2011 1:19:47 PM
Creation date
3/8/2011 9:11:43 AM
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Template:
Loan Projects
Contract/PO #
C150227
Contractor Name
South Platte Ditch Company
Contract Type
Grant
Loan Projects - Doc Type
Approval Letter
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� <br />radio/controller. This input would be compared against a target depth range in the canal- <br />mouth gate control operating code. <br />In addition to the diversion and main flume sites, the SPCD plans to install radio/control <br />units at ten recharge sites. Timely availability of rechaxge data is an area where t�ere is <br />critical need for improvement. Currently recharge credit computations are performed by <br />Sta.te Engineer's Office staff. The rapid expansion in the number of recharge sites in the <br />past two to three years has overwhelmed available staff leading to a lengthy time lag of <br />months for data processed from chart-type recorders. With real-time data availability, <br />ditch companies could readily process recharge flow data to compute amount and timing <br />of augmentation credit availability by plugging recharge flow data into a formatted <br />electronic spreadsheet program. Electronically submitted real-time data can also <br />dramatically reduce the data handling load on State agency personnel plus provide <br />needed input data for basin-wide decision support water management tools in a timely <br />manner. <br />A total of twelve field units plus one remote (office) unit will be included in the SPDC <br />portion of the demonstration project. <br />Lower Platte & Beaver Canal Co (LP&BCC): <br />The LP&BCC diversion features motor driven radial gates in both the river channel and <br />in the canal mouth. The LP&BCC main flume is located approximately %2 mile down the <br />canal from the diversion. Radio/control units would be installed at both of these sites. <br />The river channel would be automated to maintain upstream water level while the <br />canal mouth gate would be controlled to maintain a target discharge at the flume. As <br />with the SPDC diversion/flume system described above, a state condition (in this case <br />discharge) from tlie flurne would be wirelessly transmitted to the diversion structure. <br />This value would be compared against the target value in operation of the canal-mouth <br />gate operating code. <br />The LP&BCC also plans to install two similarly inter-acting radio/control units at a mid <br />reach flume and at a near-by canal bifurcation control structure. The operational strategy <br />will be similar to the SPDC spillway. A gate controlling flow in the direction of the mid- <br />reach flume will be operated to maintain a target discharge at the flume, while the gates <br />controlling flow in the bifurcation channel will be operated to maintain upstream level <br />within a target range. The radio/control unit at the bifurcation site should ultimately <br />interact with the diversion control unit as the district identifies appropriate operational <br />strategies to minimize spill and/or delivery shortages that result from supply-demand <br />mismatches passing the bifurcation. <br />The LP&BCC has seven recharge sites at which radio/control units will be installed. A <br />total of eleven field units and one remote (office) unit will comprise the LP&BCC portion <br />of the demonstration proj ect. <br />
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