HYDRO28457

• Permit No: M1979059
• IBM Index Class Name: Hydrology
• Doc Date: 12/13/2004
• Doc Name: Subsititute Water Supply Plan
• From: OSE
• To: Wayland Inc.
• Media Type: D
• Archive: No

December 8, 2004
STATE OF COLORADO
OFFICE OF THE STATE ENGINEER
Division of Water Resources
-Department of Natural Resources
1313 Sherman Street, Room 81 B
Denver, Colorado 80203
Phone [phone]
FAX [phone]
www.watecsUte.co.us
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Bill Owens
Governor
Mr. Peter Wayland / C: ~ Russell George
Wayland, Inc. t/ ! 3 ~ Executive Director
Hal D. Simpson, P.E.
10395 West Colfax, Suite 350 ~ g7vision of fdinerals and State Engineer
Lakewood Co 80215 Geolv9Y
RECEIVED
Re: Substitute Water Supply Plan, Brownwood Pit (DMG M- 9-059)
Section 19, T5N, R68W, stn P.M. DEC 13 2ppy
Water Division 1, Water District 4, Larimer County
Dear Mr. Wayland:
pivision of Minerels and Gealo~y
The State Engineer's Office has completed a review of the additional information submitted
for the substitute water supply plan for the Brownwood Pit M-79-059. Based on our review of your
new report dated July 26, 2004, the following concerns must be addressed before we can complete
the review of this requested substitute water supply plan.
The report mentioned that the gravel operation is divided into two phases. For Phase I, you
indicated that the mining began in 1980 and that the last gravel extraction occurred in the mid
1990's. There are 18.1 acres (17.1-acre pond and 1-acre pond) exposed within Phase I located
within 100 feet of the Big Thompson River. We assume thatthe 17.1-acre pond and the 1-acre pond
are connected in order to consider both ponds to be within 100 feet from the river. However please
confirm that this is correct. The report describes for Phase I "processing of gravel trucked in and
production of asphalt'. Please provide information on the amount of water used for gravel
processing and asphalt production and include those amounts in the total depletions. The future
mining operations will occur during Phase II in two cells that are approximately 9.3 acres and 13.3
acres. There will be approximately 0.25 acres of exposed groundwater during Phase II in the
dewatering trenches.
Historical Consumptive Use Credit -You indicated that, historically the Brownwood Farm
produced silage corn on 78 acres. Approximately 50.5 of those acres have been taken out of
production and 27.5 acres will remain in production. Please confirm if the 50.9 acres identified on
Figure 3 represent the 50.5 acres that have been dried-up and confirm the location of the 27.5 acres
that will remain in production. It appears that 10.3 acres of the 27.5 acres are located under the
17.1-acre pond exposed during Phase I. Please also provide adry-up covenant for that land
Please review the following items in Table AI-6-and correct as requested:
1.Add a column for the surface return flow (the annual amount should be 8.4acre-feet). Add
the surface return flow to the lagged irrigation return flows to get the total return flow. Total return
flow should be 33.62 acre-feet.
2.Correct column 11, computing the net stream depletions as column 4 minus the total return
flows (note this assumes that the future replacement operation includes delivering 2 shares of water
to the property and then returning it to the river through an augmentation station).
3.Correct note at column 11.
4.The Net Water Loss and Volume of Replacement Water in column AI-7 should be
recalculated based on all other computational changes described above.