SPDSS_Task4_IDKeyTransmountainDiversions

• Title: SPDSS Task 4 - Identify and Fill/Resolve Conflicting Records for Key Transmountain Diversion Structures
• Description: The objective of this task is to select the most reliable transmountain diversion data.
• Decision Support - Doc Type: Task Memorandum
• Date: 11/23/2004
• DSS Category: Surface Water
• DSS: South Platte
• Basin: South Platte
• Contract/PO #: C153954
• Grant Type: Non-Reimbursable
• Bill Number: SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
• Prepared By: Leonard Rice Engineering

SPDSS Task 4 Memorandum
November 23, 2004
identifies the source of data selected for each transmountain diversion structure and
potential explanations for large discrepancies between data sources.
Where to find more information
Structure specific memorandum containing physical information, operational
information, and water rights have been prepared as part of SPDSS Task 4 -Key
Transmountain Diversion Structures for the following structures:
o Alva B. Adams Tunnel,
o Homestake Pipeline,
o Berthoud Pass Ditch,
o Boreas Pass Ditch,
o Grand River Ditch,
o Moffat Water Tunnel,
o Roberts Tunnel,
o Straight Creek Tunnel,
o Vidler Tunnel,
o Cameron Pass Ditch,
o Michigan Ditch,
o Bob Creek Ditch,
o Laramie Poudre Tunnel,
o Skyline Ditch, and
o Wilson Supply Canal.
Alva B. Adams Tunnel
• Continuously monitored data at station 09013000 are available for daily and
monthly diversions from prior to 1950 through September 1996.
• Continuously monitored data at station ADANETCO are available for daily and
monthly diversions from October 1996 through 2002.
• Combined, the continuously monitored data for stations 09013000 and
ADANETCO provide a complete set of diversion data through Adams Tunnel for
the 1950 through 2002 study period.
• Continuously monitored Station ADANETCO is the recommended source for
future data collection for Alva B. Adams Tunnel.
Homestake Pipeline
The Homestake Pipeline began diverting water to the South Platte basin in 1967. Review
of data from available sources found recorded diversions through the pipeline back
through 1971. Recorded diversions between 1967 and 1970 were not identified in any of
the data sources reviewed.
Diversion records for the Homestake Pipeline deliveries to the South Platte Basin were
found from various sources and in various states of completeness.
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