2012-03-14_HYDROLOGY - M1992069

• Permit No: M1992069
• IBM Index Class Name: HYDROLOGY
• Doc Date: 3/14/2012
• Doc Name: COMBINED WATER REPLACEMENT PLAN
• From: DWR
• To: APPLEGATE GROUP
• Email Name: PSH
• 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%
Jared Dains
South Platte Combined Replacement Plan
March 14, 2012
Page 15
replacement water solely for this SWSP for as long as there are depletions at these gravel
pit sites or until such time as another replacement source is obtained. For the purposes of
this SWSP, this affidavit will be accepted for the dedication of the shares; however, if the
State Engineer determines that a different affidavit or dedication process is necessary to
assure proper dedication of the shares, additional information may be required prior to
future SWSP approvals.
13. 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. In accordance with the attached protocol for dry-up of irrigated land, the
Applicant shall provide a written notification to the water commissioner and division engineer
by April 1, 2012 identifying the lands to be dried up for the 2012 irrigation season. By
October 15, 2012 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
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. A GIS shapefile must be emailed to Div1Accounting @state.co.us for each dry-up
notification and affidavit. The shapefile shall include the pending case number, the WDID of
the plan, the acreage of dry-up, and any accompanying metadata. In addition, the datum
must NAD83 and the UTM projection must be Zone 13 North. 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 1 /4 -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.