SPDSS_Task7-2_WellUseWellAugmentationPlans

• Title: SPDSS Task 7.2 - Well Use and Well Augmentation Plans
• Description: This memorandum and associated appendices characterizes the 20 largest well augmentation plans and develops recommendations for representing well use and augmentation in SPDSS modeling efforts.
• Decision Support - Doc Type: Task Memorandum
• Date: 12/14/2007
• DSS Category: Groundwater
• DSS: South Platte
• Basin: South Platte
• Contract/PO #: C153953
• 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

Table 2
Upper Platte & Beaver Canal Augmentation Plan Structures (Plan ID 0102529)
Component WDID Comment
Plan ID used to track total pumping, depletions, and water
Augmentation Plan 0102529 supplies. Water supplies include natural stream flow if the
downstream call is junior or no call is active.
Recharge Site 0100515 Rch Reservoir ID used to store diversions to a Recharge site.
Recharge Seepage 0102529
P1R Plan ID used to track lagged accretions from Recharge site
_ see a e.
Canal Seepage 0102529
P1C Plan ID used to track lagged accretions from canal
_ seepage.
Direct Right Bypass 0100515 Diversion ID used to replace depletions by direct bypass
of ortion of direct flow ri ht.
Lagged accretions to the South Platte River from recharge diversions are returned to the river
based on return flow factors and locations defined in StateMod input files. Lagged accretions
should be accounted in recharge accretions structures based on source of seepage water -
recharge site seepage (ID 0102529_P1R) or canal seepage (ID 0102529_P1C), as summarized in
Table 2. Canal seepage should be accounted based on simulated ditch losses from all diversions
to recharge when no other supplies (e.g., irrigation) are being run in the ditch.
One recharge water right is used to divert water from the South Platte River into the ditch and
multiple recharge sites (pits) off the Upper Platte & Beaver Canal. The capacity of the ditch and
number and capacities of the pits able to store recharge water is unknown; therefore, the demand
for the recharge water rights should be modeled at one recharge site located at the end of the
Upper Platte & Beaver Canal, as summarized in Table 3.
Table 3
Upper Platte & Beaver Canal Augmentation Plan Recharge Water Rights
i
Di
h
C Recharge Site at end of Capacity / Su 1
arr
er
tc Ditch Target Amount Admin. No. App. Date
Upper Platte & Upper Platte & Beaver
Beaver Canal Canal Recharge Area 14,400 ac-ft* 234.17 cfs 44723.0 6/12/1972
(ID 0100515) (ID 0100515 Rch)
* Equal to 234.17 cfs * 1.9835 ao-ft/dy/cfs * 31 days
Augmentation Plan Operations
Operating rules to replace river depletions from well pumping include the following in order of
use:
1. Well depletions (stored under plan ID 0102529) should be replaced year-round by natural
flows when in priority, i.e., when no downstream call or when downstream call is junior to
common priority date of June 7, 1969 (admin. no. 43622.0) used for wells in Upper Platte &
Beaver augmentation plan.
2. Well depletions (stored under plan ID 0102529) should be replaced year-round with available
recharge accretions from canal seepage (stored under plan ID 0102529_P1C) and recharge
seepage (stored under plan ID 0102529_P1R).
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