2008-06-16_REVISION - M2000098

• Permit No: M2000098
• IBM Index Class Name: REVISION
• Doc Date: 6/16/2008
• Doc Name: Review of West Sediment Pond Design
• From: DRMS
• To: Colorado Lime Company
• Type & Sequence: TR1
• Email Name: ACS
• Media Type: D
• Archive: No

MEMORY TRANSMISSION REPORT
TIME JUN-16-2008 08:16PM
TEL NUMBER [phone]
NAME DIV RECLAMATION MINING & SAFETY
FILE NUMBER 427
DATE JUN-16 08:15PM
TO 19708748366
DOCUMENT PAGES 008
START TIME JUN-16 08:15PM
END TIME JUN-16 08:16PM
SENT PAGES 008
STATUS OK
FILE NUMBER 427 * SUCCESSFUL TX NOT ICE ***
STATE OF CCXLORADO
UIVIsIQN OF ItEC t.AMAT10Nr MINING ANU SAFEfY
r5aaartmeni of lvaiural Rc-sourcc--?
i 3i 3 SFrerman 5t., Room 21 S _ C O L D Ro N U O
a
Oen?er, Golo redo 80203 RE CLA.iNAT I ON
P)+ane: 1303) 86r- 3567
OB MIN 1 N G
FAX: [phone] SAE £T Y
June 16, 2008
.Mr. 'T'racy Gunn
Colorado Lime Company
1468 Highway 50
Delta, CO 81416
Post-il° Fax Note 7671
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RE: Review o£ West Sediment Pond Design, Monarch Quarry,
Technical Revision -r17--0 1. Permit No_ M-2000-098
Dear Mr_ Gunn:
Goya-mor
Harris P_ Sharma,
?:ecuu..e Plr??ccor
Ronald W_ Caxrany
?lararsl Resource Tra,rec
2'h.e Division o£Reclamation, Mining, and safety (D1?-Ms) has revicwcd the designs for the open channel spillway to be
installed ire the west sedi-r t pond at the Monarch Quarry. 2l.ose designs are based on passage through the spillway of
the peal-- flows resulting from a 5 year, 24 hour rail'. event at the quarry, the same desigre storm that the pond was
constricted to contain. -Yhe Colorado State Er.gir)ecr's dam safety regulations require that the spillway for ponds such as
the west sediment pond (minor dam, no potential hazard) be designed to pass peals flows from the 25 year, 24 hour
event- This will require widening of the spillway to a bottom width of 10 fcet (sec enclosed calculations) or increasing
the depth of the spillway- However, *f you chose to increase spillway depth, that design change must be reconciled with
the resultant decrease in storage for the 5 year event inflow. Please provide revised design documents for the spillway-
Plcasc provide a detailed description of the determination that the contributing drainage area to the west sediment pond
is 125 acres and address whether or not the increased design requirement discussed above would result in any change to
the contributing basin configuration- For example, if the contributing basin was deterrnir.ed considering nc? presence of
upgradient ditches and berms, and those ditches and banns could be breached during the 25 year evenr, then the designs
must be revisited through evaluation of the thus enlarged contributing basin.
The State Engineer requires that storm water detained in ponds such as the west sediment pond either soak into the
ground or be released to the natural drainage system within 72 hours. Pleasc describe how Colorado Lime will comply
with. this water rights requirement.
I sent you an email last Friday, June 13. 2008 discussing the need for an extension to the decision dare for technical
revision TR-OI, which was June 15. 2008_ Please provide a written extension request prior to June 25, 2008 or the
i?RMS will have to deny the technical revision in accordance with Rule 1.9 of the Construction Materials Rules of the
Colorado Minced Land Reclamation $oard.
If you have any questions, please contact me at 303-866-4063 or at al en sorensolfCa?state co us.
sine ry,
Allen C. Sorenson
Reclamation Specialist
enclosure(s)
pfficc+ oT penver Grand Juncuon Durango
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