SPDSS_Task5_KeyMuniUser_DenverWater

• Title: SPDSS Task 5 - Key Municipal User, Denver Water Board
• Description: Denver Water has been identified as a key municipal user for the South Platte Decision Support System ‎(SPDSS)‎ consumptive use and surface water modeling efforts. The purpose of this Task 5 memorandum is to document physical, legal, and operational aspects of those key structures identified.
• Decision Support - Doc Type: Task Memorandum
• Date: 2/19/2007
• 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

Figure 4
Gross Reservoir End of Month Storage Contents
s2,ooo
48,000
~ 44,000
d'
40,000
~ 36,000
~ j 32,000
d
~ 28,000
z,
24,000
y 20,000
0
~ 16,000
w
12,000
W 8,000
4,000
0
O M ~O O~ N v1 00 ~ h O M ~O O~ N v1 00 ~
v1 v1 v1 v1 ~O ~O ~O h h h 00 00 00 00 O~ O~ O~ O O
ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti
3) South Boulder Diversion Canal (Structure ID 0600590)
The South Boulder Diversion Canal diverts from the south side of South Boulder Creek
approximately 4.5 miles downstream of Gross Reservoir at the South Boulder Diversion Dam.
The river dam and canal system were originally constructed in the mid-1930s to convey
transbasin water to Ralston Reservoir and the Moffat Treatment Plant. The canal also carries
native water diverted under South Boulder Creek water rights. The South Boulder Diversion
Canal system consists of a 10-mile long series of conduits, tunnels, siphons, pipelines, and open
canals. The Canal also started carrying storage water released from Gross Reservoir once the
reservoir came online in 1955.
The canal has a capacity of 500 cfs and is typically operated between 75 cfs and 150 cfs based on
the demands at the Moffat Water Treatment Plant and available storage capacity in Ralston
Reservoir.
HydroBase Data
The data for the 1950 to present pertaining to the South Boulder Diversion Canal available in
HydroBase include the following:
Total River Diversions
• Complete record 1975 to present. Denver Water provided missing data for the available
period of record. These data have been forwarded to the DWR database administrator for
inclusion into HydroBase, and are included in Figure 5.
• Historical diversions average about 57,000 ac-ft/yr over the 1950 to present period
Denver Water Board Operating Memorandum 9 of 40