2019-07-01_INSPECTION - M2001022

• Permit No: M2001022
• IBM Index Class Name: INSPECTION
• Doc Date: 7/1/2019
• Doc Name: Inspection Problem Corrective Action
• From: Loveland Ready-Mix Concrete
• To: DRMS
• Email Name: PSH
• Media Type: D
• Archive: No

Case No. 09CW105
Findings of Fact, Conclusions of Law,
Judgment and Decree
Page 20 of 28
return flows in the future but may only take credit for the irrigation return flows upon
approval of a substitute water supply plan or entry of an amended decree, as applicable,
and such credit shall be subject to the terms and conditions of such SWSP or amended
decree. Depletions for all additional uses will consume up to 170.79 acre-feet per year.
35.6 Once mining commences at Walters Cell 4 and Green and Croissant Cell 4,
dewatering operations at the unlined gravel pits located at these sites will result in out of
priority depletions to be replaced pursuant to this plan for augmentation. Dewatering
water will be pumped from the unlined gravel pits located within Walters Cell 4 and Green
and Croissant Cell 4 and delivered to the Big Thompson River and may be used for
augmentation so long as all depletions attributable to dewatering are replaced. LRM
estimates that it will dewater up to approximately 40.33 acre-feet per month at a rate of
300 gpm. However, the dewatering rate may fluctuate and at times be higher or lower than
the currently estimated rate of 300 gpm. The augmentation credit resulting from
dewatering is equal to the amount of water delivered to the Big Thompson River.
Depletions resulting from dewatering shall be lagged to the Big Thompson River using the
Glover Method and the AWAS Glover alluvial aquifer model or similar tool described in
Paragraph 36 and using the aquifer parameters shown in the following table:
Gravel Pit X(ft) W(ft) S T G( PD/ft)
Walters and Bokelman Pits Cell 4 661.0 981.0 0.2 50,000
Green and Croissant Pits Cell 4 738.0 2,280.0 0.2 50,000
The amount of water delivered to the Big Thompson River during dewatering operations
shall be metered daily and accounted for monthly.
35.7 The maximum net amount of depletion that, to the extent it is out of
priority, is required to be replaced pursuant to this plan for augmentation (net evaporation
depletions + consumption in production washing and processing and concrete production
and dust suppression + depletions from additional uses) is estimated to be up to
approximately 361 acre-feet per year. Depletions are to a reach of the Big Thompson
River downstream of the headgate of the Hill and Brush Ditch including the E '/z of Section
24, Township 5N, Range 68 W,6d' PM, Larimer County, Colorado and Sections 19 and 30,
I Township 5N, Range 67 W, 60'PM, Weld County, Colorado.
36. Timing of depletions: Due to the timing of evaporation and mining depletions, and
the lagging effects of the aquifer, the net evaporation depletions to the river shall be
distributed through the year using the following method and parameters:
36.1 The monthly net evaporative depletions from each Gravel Pit shall be
lagged to the Big Thompson River using the Glover Method and the AWAS Glover
alluvial aquifer model or similar tool. The AWAS model is based on the Glover Stream
Depletion Method, and requires the definition of several aquifer and stream parameters,
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