2022-05-10_GENERAL DOCUMENTS - M1993041

• Permit No: M1993041
• IBM Index Class Name: General Documents
• Doc Date: 5/10/2022
• Doc Name: Special Use Permit
• From: Boulder County
• To: DRMS
• Email Name: JPL
• Email Name: JLE
• Media Type: D
• Archive: No

Dowe Flats Special Use Permit Amendment Application May 2, 2022
7. The use will support a multimodal transportation system and not result in significant
negative impacts to the transportation system or traffic hazards.
Continued mining operations at Dowe Flats through this SUP application will not generate new
traffic. The traffic generated by the operation of the site is so insignificant that County staff
determined that a new traffic impact study was not needed for this application. Copies of the
PAMS report prepared by Felsburg, Holt & Ullevig traffic consultants and email correspondence
from County staff approving the PAMS report are included in this application package.
8. The use will not cause significant air, odor, water or noise pollution.
Continued mining at Dowe Flats will not result in any significant air, odor, water, or noise
pollution. The site successfully operates in accordance with its existing Air Pollution Emissions
Notice (APEN) and Storm Water Permit and associated stormwater management plan, all of
which were issued by the State of Colorado Department of Public Health and Environment
(CDPHE). The site does not generate odors. Noise is effectively controlled because the activity
is contained within the mining cell where the walls of the cell and earthen berms constructed
around the site absorb noise that is generated. In addition, the processing equipment on the
site is enclosed to further minimize the creation of noise impacts. There is no history of
violations or compatibility-related complaints associated with Dowe Flats.
9. The use will be adequately buffered or screened to mitigate any undue visual impacts of
the use.
The existing vegetated berm successfully screens views into Dowe Flats from adjacent public
roads (Highway 66 and North 53rd Street). There have been no complaints about visual impacts
and because the site will continue to operate as it has historically, no new visual impacts will be
created.
10. The use will not otherwise be detrimental to the health, safety, or welfare of the present
or future inhabitants of Boulder County.
The use proposed in this SUP will not be detrimental to the health, safety, or welfare of the
present or future inhabitants of Boulder County. The Dowe Flats facility has operated since
1993, and the plan is for the facility to continue to operate as it has historically: in a manner that
is protective of the health, safety, and welfare of the inhabitants of the County, including:
• Transporting all material from Dowe Flats to the CEMEX, Inc. cement plant via covered,
electric conveyor rather than haul truck.
• Operating under an APEN permit issued by the CDPHE.
• Operating in accordance with Mine Safety and Health Administration (MSHA)
requirements.
• Hiring a blasting contractor, Buckley Powder, a Colorado company with a good safety
record that is properly permitted through the Bureau of Alcohol, Tobacco, Firearms and
Explosives (ATF).
• Maintaining a stringent health and safety program and protocols for all CEMEX, Inc.
employees and contractors.
11. The use will establish an appropriate balance between current and future economic,
environmental, and societal needs by minimizing the consumption and inefficient use of
energy, materials, minerals, water, land, and other finite resources.
Continued mining at Dowe Flats will create a balance between current and future economic,
environmental, and societal needs of Boulder County by minimizing the consumption and
inefficient use of energy, materials, minerals, and land.
Review Criteria Statement- Page 9 O TETRA TECH