2013-04-16_HYDROLOGY - M1981058

• Permit No: M1981058
• IBM Index Class Name: HYDROLOGY
• Doc Date: 4/16/2013
• Doc Name: SWSP
• From: OSE
• To: Deere & Ault Consultants, Inc.
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

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%
Mr. Mark A. McLean, P.E.
DeBeque Pit SWSP
future SWSP approvals.
April 12, 2013
Page 6
16. The Applicant shall perform an inspection and provide verification for all parcels of dried up land
used to generate augmentation credits during the term of this SWSP. The final verification of
dry up will be in the form of an affidavit signed by an individual having personal knowledge of
the dry up for the entire irrigation season for each parcel of land used in this SWSP. By
December 31, 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 2013
irrigation seasons 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 provide a written notification to the water commissioner and division engineer by
April 1, 2014 identifying the lands to be dried up for the 2014 irrigation season. 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 Tess 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.
1. Adapted from EVAPOTRANSPIRATION AND AGRONOMIC RESPONSES IN FORMERLY IRRIGATED MOUNTAIN
MEADOWS, South Park, Colorado, March 1, 1990; Revised September 1, 1991
17. The dry year analysis required by this office for a permanent plan for augmentation may vary from
the analysis approved in this SWSP. Approval of this SWSP shall have no precedential or
evidentiary force, does not constitute an admission or statement of position in any other
proceeding, and shall not imply concurrence with any findings of fact or conclusions of law
contained herein, or with the engineering methodologies used by the Applicant.
18. This SWSP may be revoked or modified at any time should it be determined that injury to other
vested water rights has occurred or will occur as a result of the operation of this SWSP. Should