Laserfiche WebLink
SPDSS Task 4 Memorandum <br />November 23, 2004 <br />Results <br />Results -Transmountain Structure Overview <br />A location map of transmountain diversion structures is presented on Figure 1. The 19 <br />transmountain diversions studied, the diversion owners, and both the basin of origin and <br />destination are presented in Table 1. Eureka Ditch and Columbine Ditch no longer <br />function as transmountain diversion structures. August P. Gumlick Tunnel and Deadman <br />Ditch continue to be operational; however, diversions through these structures are re- <br />diverted through other transmountain structures before flowing into the South Platte <br />Basin. Specifics on how these structures should be incorporated for the purpose of <br />defining inflows to the South Platte basin are addressed in the structure specific section of <br />this memorandum. <br />Results -Data Sources <br />The transmountain diversion structures reviewed as part of SPDSS are typically equipped <br />with one measuring device at which transmountain diversions are recorded. Diversions <br />records for each structure are typically reported by at least two sources, state <br />hydrographers and water commissioners. <br />State hydrographer records, referred to as station records, are stored in the state database <br />(HydroBase) as streamflow measurements. State hydrographer records represent <br />continuously monitored stations. Identifiers for state hydrographer records may be either <br />USGS streamflow identifiers or DWR streamflow identifiers. USGS streamflow <br />identifiers are those identifiers that are numbered (e.g., 09013000). DWR streamflow <br />identifiers are those identifiers that are lettered (e.g., STCTUNCO). Transmountain <br />stations with USGS identifiers were originally operated by the USGS; however, due to <br />cutbacks or changes in priorities, DWR took over the station for administrative purposes. <br />Transmountain stations with DWR identifiers have been owned and operated by the <br />DWR from the time they were installed. Regardless of the type identifier (USGS or <br />DWR), all South Platte basin transmountain diversion gages are currently operated by the <br />DWR. It should be noted, however, that while DWR oversees the operation all South <br />Platte basin transmountain gages, the day to day manning of the gages may fall in the <br />hands of the project owners. <br />Water commissioner records, referred to as structure records, are stored in the state <br />database (HydroBase) as diversions. Water commissioner records represent <br />administrative records associated with a physical structure, usually decreed in water <br />court, used for diverting, storing, releasing, or measuring water. Identifiers for state <br />administrative structure records are water district identifiers (WDIDs). WDIDs are <br />seven-digit numbers where the first 2 digits indicate the water district where the structure <br />is located and the remaining digits are unique to each structure in that water district. <br />Administrative structure records are maintained by the Water Commissioner for the <br />district in which the structure is located. <br />Page 3 of 19 <br />