2015-03-31_HYDROLOGY - M1999050

• Permit No: M1999050
• IBM Index Class Name: HYDROLOGY
• Doc Date: 3/31/2015
• Doc Name Note: April 1, 2015 through March 31, 2016
• Doc Name: Substitute Water Supply Plan April 1, 2015 through March 31, 2016
• From: DNR Water Resources
• To: DRMS
• Email Name: MAC
• Media Type: D
• Archive: No

Mr. Todd Williams, P.E.
March 24, 2015
Page 5 of 6
11: 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.
12. The replacement water, which is the subject of this plan cannot be sold or leased to any
other entity. As a condition of subsequent renewals of this substitute water supply plan, the
replacement water must be appurtenant to this site until a plan for augmentation and /or
liner approval is obtained for the entire site. All replacement water must be concurrent with
depletions in quantity, timing, and locations.
13. Adequate accounting of depletions and replacements must be provided to the division
engineer in Greeley ([e-mail]) and the water commissioner
([e-mail]) on a monthly basis, or more frequent if required by the water
commissioner. All amounts shall be in acre -feet. .
14. The name, address, and phone number of the contact person who will be responsible for the
operation and accounting of this plan must be provided on the accounting forms submitted to
the division engineer and the water commissioner.
15. .Applicant shall follow the Augmentation Plan Accounting, Dry-Up of Irrigated Land, and
Recharge Administrative Protocols, or any other applicable protocols as referenced in the
attached documents, for the operation of this SWSP.
16. Conveyance loss for delivery of augmentation water to is subject to assessment and
. modification as determined by the division engineer.
17. The amount and location of the dry-up of the irrigated acreage associated with the subject
2.5 shares of the Box Elder Ditch Company was previously documented and approved by the
division engineer and water commissioner (see attached map 2).
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. Granting of this plan does not imply approval by this office of any such court
application(s).
19. The Timnath- Connell Pit has been continuously dewatered. Dewatering operations at this site
create lagged accretions that mimic its lagged depletions due to the recharge of dewatering
water. The Applicant intends to line the pit when mining activity is complete, and none of the
currently dewatered areas will be within the unlined lakes after reclamation. Therefore the
site should not experience water loss associated with a "first fill" that occurs when unlined
gravel pits are allowed to fill with ground water. The Applicant proposes that in accordance
with the current dewatering plan, once dewatering at the site ceases, there will not be any
post - pumping depletions that must be addressed.
20. If dewatering of the Timnath- Connell Pit were discontinued prior to the completion of a liner,
the pit would fill creating additional depletions to the stream system and resulting in
increased evaporation. Additionally, should an augmentation plan not be obtained for the
unlined ponds, long term depletions to the stream system would result. To assure that
additional or long term depletions to the river do not occur, a bond for $510,198 for the lining
or backfilling of the Timnath- Connell Pit was obtained in 1999 through DRMS. This bond was
determined to be sufficient by DRMS during a site inspection on August 31, 2012.