2012-02-06_HYDROLOGY - M2005059

• Permit No: M2005059
• IBM Index Class Name: HYDROLOGY
• Doc Date: 2/6/2012
• Doc Name: SWSP
• From: OSE
• To: Weiland, Inc.
• Permit Index Doc Type: Hydrology Report
• Email Name: ECS
• 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%
Peter Wayland
Nelson Mining Resource SWSP
February 1, 2012
Page 6
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
1. Adapted from EVAPOTRANSPIRATION AND AGRONOMIC RESPONSES IN FORMERLY
IRRIGATED MOUNTAIN MEADOWS, South Park, Colorado, March 1, 1990; Revised
September 1, 1991
15. This substitute water supply plan may be revoked or modified at any time should it be
determined that injury to other water rights has or will occur as a result of this plan.
Should this substitute water supply plan expire without renewal or be revoked prior to
adjudication of a permanent plan for augmentation, all excavation of product from below
the water table, and all other use of water at the pit, must cease immediately.
16. In accordance with amendments to Section §25 -8- 202 -(7), C.R.S. and "Senate Bill 89 -181
Rules and Regulations" adopted on February 4, 1992, the State Engineer shall determine
if this substitute water supply plan is of a quality to meet requirements of use to which the
senior appropriation receiving the substitute supply has normally been put. As such, water
quality data or analyses may be requested at any time to determine if the requirement of
use of the senior appropriator is met.
17. The decision of the state engineer shall have no precedential or evidentiary force, shall
not create any presumptions, shift the burden of proof, or serve as a defense in any
water court case or any other legal action that may be initiated concerning the substitute
water supply plan. This decision shall not bind the State Engineer to act in a similar
manner in any other applications involving other plans or in any proposed renewal of this
plan, 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.