PERMFILE120849

• Permit No: M1998024
• IBM Index Class Name: Permit File
• Doc Date: 5/8/1998
• Doc Name: TECHNICAL ADEQUACY REVIEW OF NEW 112 PERMIT APPLICATION M-98-024 HIDDEN VALLEY PIT
• From: DMG
• To: B & B EXCAVATING
• Section_Exhibit Name: EXHIBIT D
• Media Type: D
• Archive: No

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STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
.
Ueparlmenl of Natural Resources ~
I S 13 Sherm, n 51., Room 21 S y1
Donvi~r. Colorado A0203 ~1
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Phunc (5011866-156% Il
FAX: Illl?I 83'~A I Ub
DEPARTMENT OF
NATURAL.
RESOURCES
May 8, 1998
Fny Romrr

Mr. Scott Hoover Governor
Imes 5 Luchhrad
B&B Excavating ErecmweD~reclor
P.O. Drawer 249 M¢harl B. fool;

Vail, CO 81658 Drvis~on Dtreuor
RE: Technical Adequacy Review of New 112 Permit Application #M-98-024, Hidden Valley Pit
Deaz Mr. Hoover,
This letter is being written to address technical inadequacies within the 112 permit application
submitted by your company, #M-98-024, Hidden Valley Pit. The following issues need to be
resolved before the Division of Minerals and Geology (DMG) can consider approving your
application:
1) A written commitment to a topsoil salvage and replacement range is still needed. While the
figure of 14" of topsoil is mentioned in several places within the application, it is never
specifically cited as the amount to be replaced on the reclaimed slopes. A minimum depth of
/topsoil must be comitted to prior to approval of the application, in accordance with Rule
6.3.4(1)(c)(i) of the Construction Materials Rules and Regulations.
2) In Exhibit D, Mining Plan, on p. 26, it is mentioned that topsoil will be stockpiled along the
northern and western boundaries to prevent runoff from the undisturbed areas from entering the
Phase I process azea. Only overburden may be used in the drainage berms surrounding the
temporary site. This mistake has been corrected on Fig.4, which shows the new irrigation
drainage paths and only mentions the use of overburden in the 2' berm surrounding the site.
Please confirm that no topsoil will be used in these berms, in accordance with Rule 3.1.9(3).
,3) In Exhibit D, Mining Plan, p. 45, paragraph (3); please change the last sentence to read: "If
any subsurface water is encountered, the Division and the Office of the State Engineer (OSE)
will be notified immediately to determine the best course of action."
4) DMG is requesting a commitment to a specific seed mix for topsoil stockpile seeding. Exhibit
Reclamation Plan, p.55 states [hat vegetative cover will be established to preserve stockpiles
v' that are not replaced in "a reasonable period of time." Rule 3.1.9(1) requires seeding of all topsoil
stockpiles left in place longer than one growing season. Please commit to this and to a specific
seed mix and seeding rate for the stockpiles.