2015-07-09_HYDROLOGY - M1977439

• Permit No: M1977439
• IBM Index Class Name: HYDROLOGY
• Doc Date: 7/9/2015
• Doc Name: Combined Substitute Water Supply Plan
• From: Div of Water Resources
• To: DRMS
• Email Name: ECS
• Media Type: D
• Archive: No

Upper Poudre Combined SWSP
June 26, 2015
Page 9 of 11
this SWSP. Information regarding depth to ground water may be provided using existing
irrigation wells, existing or new monitoring wells, or piezometers located on the dried-up
fields. Applicant may utilize wells or piezometers located within '/a mile of each field
provided that the Applicant can demonstrate the depth to ground water information available
off-site is representative of the depth to ground water on the dried-up land. The Applicant
shall modify its accounting to reduce the amount of the calculated HCU that may be claimed
in this SWSP according to the table below. Measurements taken at the start of each month
will determine the necessary reduction in credit to be applied during the following month.
The Applicant may use another methodology upon review and prior approval by the state
engineer and division engineer. (Construction of monitoring holes/welts, or piezometers
requires that permits or notices be obtained as described in Table 1 of the Water Well
Construction Rules.)
Depth to Ground
Water (Feet)
Percent Reduction in Calculated HCU'
Native Grass Alfalfa
1
85%
100%
2
50%
90%
3
30%
75%
4
20%
50%
5
15%
35%
6
10%
20%
7
5%
15%
8
0%
10%
'Adapted from EVAPOTRANSPIRATION AND AGRONOMIC RESPONSES IN FORMERLY IRRIGATED
MOUNTAIN MEADOWS, South Park, Colorado, March 1, 1990; Revised September 1, 1991
16. The Division of Water Resources will not acknowledge any recharge activity conducted
without the knowledge of the water commissioner. The flow into the recharge structure must
be metered and equipped with a continuous flow recorder unless the water commissioner in
conjunction with the division engineer determines adequate records may be kept without
such equipment. If the recharge structure is designed to discharge water via a surface outlet,
such discharge must also be metered and equipped with a continuous flow recorder.
Applicant shall follow the attached Administration Protocol - Recharge for the operation of
this SWSP.
17. Water may be delivered to recharge only if the net impact of this plan is not negative. Water
must first be delivered or exchanged to offset negative impacts of this plan before it may be
diverted for recharge.
18. If reclamation of the mine site produces a permanent water surface exposing groundwater to
evaporation, an application for a plan for augmentation must be filed with the Division 1
Water Court at least three years prior to the completion of mining to include, but not be
limited to, long-term evaporation losses. If a lined pond results after reclamation,
replacement of lagged depletions shall continue until there is no longer an effect on stream
flow. Conditional storage rights for the Home Office Pit and North Taft Hill Expansion Site
(North Shore Reservoir and Taft Hill Reservoir, respectively) were decreed in case no.
92CW157, and were decreed for the Overland Ponds Site in case no. OOCW251. This office has
no knowledge of any applications for a plan for augmentation that covers evaporation from
unlined ground water ponds. Granting of this plan does not imply approval by this office of
any such court application(s).