2019-08-27_HYDROLOGY - M1989120

• Permit No: M1989120
• IBM Index Class Name: Hydrology
• Doc Date: 8/27/2019
• Doc Name: Substitute Water Supply Plan
• From: DWR
• To: DRMS
• Email Name: PSH
• Media Type: D
• Archive: No

Amended Aggregate Industries South Platte Combined SWSP August 27, 2019
Plan I Ds 3614, 47731 3624, 47721 4616, 3437, 3376, 3650, 3668, and 5475 Page 15 of 21
Long Term Depletions and Reclamation
In accordance with the letter dated April 30, 2010 (copy attached) from the Colorado Division
of Reclamation, Mining, and Safety ("DRMS"), all sand and gravel mining operators must comply with
the requirements of the Colorado Reclamation Act and the Mineral Rules and Regulations for the
protection of water resources. The April 30, 2010 letter from DRMS requires that you provide
information to DRMS to demonstrate you can replace long term injurious stream depletions that
result from mining related exposure of groundwater. The DRMS letter identifies four approaches to
satisfy this requirement, which are identified and described in the attached letter.
In accordance with approach no. 4, you have provided an affidavit dated February 29, 2012,
that dedicates the 13.5 shares of the Whitney Ditch Company and 96 shares of the Fulton Irrigating
Ditch Company described above as replacement water solely for this combined SWSP for as long as
there are depletions at these gravel pit sites or until such time as another replacement source is
obtained. This dedication supersedes a previous dedication dated January 25, 2011. A copy of the
affidavit is attached to this letter. For the purposes of this SWSP, this affidavit will be accepted for
the dedication of the shares; however, if the State Engineer determines that a different affidavit or
dedication process is necessary to assure proper dedication of the shares, additional information may
be required prior to future SWSP approvals. The bond posted for the F-Street pit was found to be
inadequate during a site inspection by DRMS on February 10, 2012. The bond was increased from
$71,404 to $10,237,994 effective January 17, 2018.
A summary of the final reclamation and the compliance approach to the DRMS letter including
the current posted bond amount is shown in Table E.
Table E - Final Reclamation Summary
Site Name Proposed Final Bond DRMS Comments
Reclamation Amount Approach No.
Backfilling of all post-81 areas in progress.
Jeronimus Pit Backfilled $1510,800 12 4 Water rights dedicated via February 29, 2012
affidavit.
Hazeltine Pit Lined Reservoir $670 602 3 Bonded for lining. The site has been lined with a
' slurry wall (WDID 0203381).
Bonded for lining. The south and central
Brighton Pit Lined $150 000 1 3 reservoirs are lined with a slurry wall (WDID
g Reservoir/Lakes 0203385) and have obtained SEO liner approval.
A bond reduction was approved by DRMS.
Tucson South Pit Lined Reservoir $326 040 3 Bond increased to cover backfilling of exposed
' groundwater.
Bonded for lining. (Pit lined in 2013; however,
Wattenberg Pit Lined Reservoir $520,000 3 liner has not et been tested or approved.)
Y PP )
Platte Valle Pit Groundwater Lake $754 732 1, 4 Bonded for backfilling. Water rights dedicated
y via February 29, 2012 affidavit.
Bonded for backfilling. Lagged and future
depletions from evaporation and consumptive use
Distel Pit Groundwater Lake $1,216,716 1, 2 by wetlands vegetation at the site covered under
City of Longmont augmentation plan decreed in
case no. 2009CW271.
Tull Pit Lined Reservoir $2 947 600 1 3 Bonded for lining. Conditional water storage
' right decreed in case no. 1994CW062.
W.W. Farms Pit Lined Reservoir/ $270 000 2 Conditional water storage right and plan for
Groundwater Lakes augmentation for evaporation from up to 66