2019-06-18_REVISION - M1977300 ‎(2)‎

• Permit No: M1977300
• IBM Index Class Name: Revision
• Doc Date: 6/18/2019
• Doc Name: Adequacy Review Response #2
• From: Colorado Legacy Land
• To: DRMS
• Email Name: AME
• Media Type: M
• Archive: No

7,0'
C REDUCER
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_ER
HP STORM
BERM NATIVE MATERIAL TO
GUIDE WATER TOWARDS CULVERT
(TYP,)
4,0'
SECTION A -A/
4.2' � 5.0'
SECTION B -B/
NOTES:
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1, CONCRETE AND REBAR TO CONFORM TO CDOT STANDARD PLAN NO. M-601-10
2, TRASH RACK TO CONFORM TO JEFFERSON COUNTY SPECS
2,1, MATERIALS,, ALL TRASHRACKS WILL BE CONSTRUCTED WITH SMOOTH STEEL PIPE WITH A MINIMUM 1.25 INCHES OUTSIDE DIAMETER,
TRASHRACK ENDS AND BRACINGS SHALL BE CONSTRUCTED WITH STEEL ANGLE SECTIONS, ALL TRASHRACK COMPONENTS WILL HAVE
A CORROSION PROTECTIVE FINISH,
22, TRASHRACK DESIGN,, THE TRASHRACKS WILL BE CONSTRUCTED WITHOUT CROSS -BRACES (IF POSSIBLE) IN ORDER TO MINIMIZE
DEBRIS CLOGGING, THE TRASHRACK WILL BE DESIGNED TO WITHSTAND THE FULL HYDRAULIC LOAD OF A COMPLETELY PLUGGED
TRASHRACK BASED ON THE HIGHEST ANTICIPATED DEPTH OF PONDING AT THE TRASHRACK, THE TRASHRACK WILL ALSO BE HINGED
AND REMOVABLE FOR MAINTENANCE PURPOSES, THE CLEAR OPENING AT THE BOTTOM SHOULD BE 9 TO 12 INCHES TO PERMIT
DEBRIS AT LOW FLOW TO G❑ THROUGH
2.3. BAR SPACING,. THE STEEL PIPE BARS WILL BE SPACED WITH A CLEAR OPENING OF 4� TO 5 INCHES, IN ADDITION THE ENTIRE
RACK WILL HAVE A MINIMUM CLEAR OPENING AREA (NORMAL TO THE RACK) AT THE DESIGN FLOW DEPTH OF FOUR TIMES THE
CULVERT OPENING AREA,
2,4, TRASHRACK SLOPE: THE TRASHRACK WILL HAVE A LONGITUDINAL, SLOPE OF NO STEEPER THAN 3 HORIZONTAL TO 1 VERTICAL FOR
MAINTENANCE PURPOSES,
DISCLAIMER TEXT: NORTH WASTE ROCK PILE DIVERSION PIPE - SHEET 5
THIS DRAWING HAS BEEN PREPARED FOR THE USE OF ALEXCO WATER AND CONCRETE HEADWALL DETAILS
n
ENVIRONMENT INC,'S CLIENT, COLORADO LEGACY LAND, LLC AND MAY NOT BE USED, SCHWARTZWALDER MINE,
REPRODUCED OR RELIED UPON BY THIRD PARTIESa EXCEPT AS AGREED BY ALEXCO ALEXCO
GOLDEN COLORADO
COLORADO LEGACY LAND WATER AND ENVIRONMENT INC, AND COLORADO LEGACY LAND, LLC AS REQUIRED BYWATERTECHNICAL REVISION # 8
6-10-2019 For DBMS Review C EW -- LAW OR FOR USE OF GOVERNMENTAL REVIEW AGENCIES, ALEXCO WATER AND 40
5-22--2019 For DBMS Review B EW -- ENVIRONMENT INC ACCEPTS NO RESPCINSIBILITY, AND DENIES ANY LIABILITY
ENVIRONMENT MINE LAND RECLAMATION PERMIT --x.977-300
4-23-2019 Draft for internal review A EW WHATSOEVER., TO ANY PARTY THAT MODIFIES THIS DRAWING WITHOUT ALEXCO WATER REVISION: C 6-17-19 PROJECT No.: SCHWARTZ.
AND ENVIRONMENT'S EXPRESS WRITTEN CONSENT
DATE ISSUE/REVISION No. DRW. APP. DRAWN BY: EW DESIGNED BY: SL REVIEWED BY: EB & BR