2013-05-29_HYDROLOGY - M1996052

• Permit No: M1996052
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/29/2013
• Doc Name: SWSP
• From: OSE
• To: Parsons Water Consulting, LLC
• Permit Index Doc Type: Hydrology Report
• Email Name: ECS
• Media Type: D
• Archive: No

Mr. Rick Parsons, P.E.
L.G. Everist Combined SWSP Amendment 1
Page 8 of 9
May 28, 2013
William. Scneider(a state.co.us and Shera Sumerford at Shera.Sumerford(a)-state.co.us) within 30
calendar days of the end of the month for which the accounting is being made. Submitted
accounting shall conform to the Administration Protocol — Augmentation Plan Accounting.
12. The Applicant is required to provide a written notification to the water commissioner and division
engineer by April 1 of 2012 and 2013 identifying the lands to be dried up for the 2012 and 2013
irrigation season. The Applicant submitted an affidavit signed by James Sittner, Front Range
Project Manager, verifying the dry -up lands associated with L.G. Everist's Lupton Bottom Ditch
and Rural Ditch shares. This is accepted as the written notifications required by April 1 of 2012
and 2013. By October 31 of 2012 and 2013 the Applicant shall provide an affidavit to the water
commissioner and division engineer that identifies and confirms the lands that were dried up
during the 2012 and 2013 irrigation season in order that the final determination of augmentation
credits for the irrigation season can be made along with mapping showing any revisions to the
dried -up acreage. The Applicant shall modify accounting to reflect that the credit from any dried
up fields containing alfalfa or native grass was assessed in the following manner:
(a) For fields deep tilled or chemically treated to successfully kill alfalfa or native grass, 100%
credit will be given for consumptive use as otherwise computed under the conditions of this
approval.
(b) For fields not deep tilled or chemically treated to successfully kill alfalfa, records of monthly
monitoring of depth to groundwater at existing irrigation wells or existing or new monitoring
wells or piezometers within % -mile of each alfalfa or native grass field must be maintained.
Credits will be reduced according to the following table when depth to groundwater is less
than the depth assumed to provide no significant contribution to alfalfa growth.
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 approval by the State Engineer and Division Engineer.
Depth to Ground
Water (Feet)
Percent Reduction in CU Credit'
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%
1. Adapted from EVAPOTRANSPIRATION AND AGRONOMIC RESPONSES IN FORMERLY IRRIGATED
MOUNTAIN MEADOWS, South Park, Colorado, March 1, 1990; Revised September 1, 1991
13. This substitute water supply plan may be revoked or modified at any time should it be determined
that injury to other vested water rights has or will occur as a result of this plan. Should this supply
plan expire without renewal or be revoked prior to adjudication of a permanent plan for
augmentation, all use of ground water must cease immediately.
14. If reclamation of the mines at the gravel pit sites included in this SWSP produce 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