|
C 0 L 0 R A D 0
<br /> Division of Water Resources
<br /> Department of Natural Resources
<br /> February 4, 2021
<br /> Ms. Krystle Ervin
<br /> Martin and Wood Water Consultants, Inc.
<br /> 538 Commons Drive
<br /> Golden, CO 80401
<br /> Re: St. Barbara Sand and Gravel Mine, Substitute Water Supply Plan
<br /> DRMS Permit No. M-2004-013
<br /> Section 1, T21 S, R63W, and Section 6, T21 S, R62W, 6th P.M.
<br /> Water Division 2, Water District 14
<br /> SWSP ID 4695, WD I D 1407803
<br /> Approval Period: January 1, 2021 — December 31, 2022
<br /> Contact for Ms. Ervin: 303-526-2600; KErvin@martinandwood.com
<br /> Dear Ms. Ervin:
<br /> We have received your October 30, 2020 letter requesting the renewal of a substitute water
<br /> supply plan ("SWSP") in accordance with § 37-90-137(11) C.R.S., for a sand and gravel pit
<br /> to be operated by the applicant, Trans Colorado Concrete (a division of Pete Lien & Sons,
<br /> Inc.). The mine is permitted with the Division of Reclamation, Mining, and Safety under File
<br /> No. M-2004-013. The $257 renewal fee has been received and given receipt no. 10007297.
<br /> SWSP OPERATION
<br /> The St. Barbara Sand and Gravel Mine is located in Section 1, Township 21 South, Range
<br /> 63 West of the P.M. and Section 6, Township 21 South, Range 62 West of the 6th P.M. in
<br /> Pueblo County. Mining at the St. Barbara Sand and Gravel Mine is projected to continue for
<br /> approximately 25+ years. Currently there is no activity. However, at this time it is uncertain
<br /> whether mining at the site will occur over the approval period and whether a slurry wall will
<br /> be constructed. Therefore, five scenarios were considered. The maximum exposed water
<br /> surface area in the five ponds located on the property is currently at 9.76 acres. This is the
<br /> total exposed surface area during all months when mining is not in progress.
<br /> Under Scenario A, Pond 5 will be actively mined during March through August of 2021 and
<br /> 2022. During active mining, the total exposed groundwater will be reduced to 4.57 acres. In
<br /> August 2021 and 2022, the total exposed groundwater will be expanded to 9.76 acres. Pond
<br /> 5 will be dewatered via a dewatering trench when the cell is being actively mined.
<br /> Operational losses will occur due to water retained in the mined product and water used for
<br /> dust suppression.
<br /> Under Scenario B, Pond 5 will be actively mined during March through August of 2022.
<br /> During active mining, the total exposed groundwater will be reduced to 4.57 acres. In August
<br /> ." I"�, �. �;.1'"e e t', Room 821 M M")„V ql m� W m p f O„'m,B 66,
<br /> 6m 3 '1
<br /> /
<br /> »' I
<br /> , q
<br /> 4
<br /> r
<br /> I
<br /> ;.w,a r«; „ u r,✓ 1, ;- a;,rr-,. " r, i rc ;„;c v,, c `, r,i r, r ,,:- s r r r„
<br /> w , i o
<br /> �
<br /> ,
<br /> z
<br />
|