2012-01-20_HYDROLOGY - M1977036

• Permit No: M1977036
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/20/2012
• Doc Name: SWSP
• From: OSE
• To: Applegate Group, Inc.
• Permit Index Doc Type: Hydrology Report
• Email Name: PSH
• Media Type: D
• Archive: No

Mr. Jared Dains
Greeley 35th Ave Pit M- 1977 -036
January 11, 2011
Page 3
Lafarge has yet to transfer DRMS M- 1977 -036 to Marietta and is the current bond
holder at the site. Until the DRMS permit has been officially transferred, Lafarge may
remain liable for reclamation of the site including lining or backfilling to prevent long
term depletions in the unlikely event the pit operator `walks away' from the site. 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 ground water. The DRMS letter identifies four approaches to satisfy this requirement.
In accordance with approach no. 1 and 3, Lafarge has obtained a bond for $967,789
through DRMS for lining or backfilling of the exposed ground water.
SWSP Conditions of Approval
I hereby approve the proposed SWSP in accordance with § 37 -90- 137(11), C.R.S.
subject to the following conditions:
1. This SWSP is approved with the effective date of November 1, 2011 and shall be valid
through October 31, 2012 unless otherwise revoked or modified. If this SWSP will not be
made absolute by a water court action by the SWSP expiration date, a renewal request
must be submitted to this office with the statutory fee of $257 no later than September 15,
2011
2. A well permit, no. 74863 -F, was issued for a maximum total of post -1981 exposed ground
water area in the pit of 42 acres, and allows 6 acre -feet per year for dust control, 14.72
acre -feet per year for water lost in mined product, and 8.84 acre -feet per year for
concrete production. A change of ownership to Marietta may be required for this permit to
remain valid.
3. The total surface area of the groundwater exposed after December 31, 1980 must not
exceed 26.3 acres, which results in an evaporative loss of 76.84 acre -feet per year.
4. The annual water used for dust control shall not exceed 6 acre -feet, the total product
mined shall not exceed 300,000 tons per year which results in 8.83 acre -feet per year of
water lost with the product, and the total annual amount of water used in concrete
production shall not exceed 8.84 acre -feet.
5. Total consumption at the 35 Avenue Pit must not exceed these aforementioned amounts
unless an amendment is made to this plan.
6. Approval of this SWSP is for the purposes as stated herein. Any additional uses for
which the water may be used must first be approved by this office.
7. All releases of replacement water must be sufficient to cover all out -of- priority depletions
in time, place, and amount and must be made under the direction and /or the approval of
the water commissioner. The release of replacement water may be aggregated to
maximize beneficial use. The water commissioner and /or the division engineer shall
determine the rate and timing of an aggregated release. The Applicant is required to
coordinate with the water commissioner the delivery location of replacement water to
ensure out -of- priority depletions are adequately replaced to prevent injury to other water