PERMFILE123411

• Permit No: M2004067
• IBM Index Class Name: Permit File
• Doc Date: 11/21/2005
• Doc Name: Exhibit 18
• From: Clear Creek District Water Providers LLC
• To: DMG
• Media Type: D
• Archive: No

Memorandum to Corey Hoffmann
November 14, 2005
• Pagel l
7. Proposed condition: The Applicant shall conduct apre-blast survey of all potentially
affected off-site structures within 200 feet of the affected lands as required in the Division's
September 12, 2005, 3`d Adequacy Review comments (from Allen Sorenson). The survey
shall be conducted in accordance with the Off-ice of Surface Mining and Enforcement's
(OSMRE) Blasting Guidance Manual (1987), and Section 816.62 of the OSMRE
regulations.
The operator shall determine the condition of the structures and shall document other
physical factors that could reasonably be affected by the blasting. The survey shall include
all structures and sensitive receptors within those structures that have the potential for
adverse impacts resulting from blasting operations including but not limited to:
1. Buildings;
2. Foundations;
3. HVAC and odor control systems;
4. Mechanical equipment including pumps, pipes, valves, and other related
appurtenances;
5. Wastewater treatment process-related equipment including aeration basins,
clarifiers, filters, bio-solids handling, and ultraviolet light disinfection systems; and
6. Process monitoring equipment including all sensors (level, flow, and water quality),
• instrumentation, and supervisory control and data acquisition (SCADA) systems
related to wastewater treatment plant operations.
7. Highway lighting and related power transmission and control systems.
The survey shall be conducted by a licensed Professional Engineer, registered in the State
of Colorado, who is Familiar with the above appurtenances and the potential impacts of
external shock and vibration upon their condition and operations. The engineer
conducting the survey shall sign and stamp the written report. Prior to commencing
blasting operations, the survey shall be submitted to the Division, the Black Hawk Fire
Department, the Black Hawk-Central City Sanitation District, the Silver Dollar
Metropolitan District, and all other owners of off-site structures within 200 feet of the
affected lands, in sufficient time to allow for appropriate review and comment, and in
sufficient time to allow the named parties to appeal the permit conditions. Blasting shall
not commence until the pre-blast survey is accepted in writing by the Division.
Board Jurisdiction: Rule 6.4.19 (Exhibit S -Permanent Man-made Structures) requires
that, where a notarized agreement or letter cannot be obtained for structures within two
hundred feet of the affected land, the Applicant shall provide an appropriate engineering
evaluation demonstrating that such structures shall not be damaged by blasting and other
activities. Rule 6.1.2 requires that 112 Reclamation Permit operations "shall provide all
the Exhibits, as described in [Rule] 6.4 ...." Rule 6.1.] requires these Exhibits to be
submitted with the permit application. All of the information required as part of Exhibit
S must therefore be included as part of the application. This is critical so that parties
potentially impacted have adequate notice and time to review these submittals and
•
LEONARD RICE ENGINEERS. INC.
2000 CEnv STREET, SURE 300, DENVER. CoEOanoo 8021 1-51 1 9 • PHONE [phone] • FAx [phone]