HomeMy WebLinkAbout1.23 Fugitive Dust Control Plan & Berming & Screening PlanFugitive Dust Control Plan
United will implement the following fugitive dust control measures and best management
practices (BMPs) to reduce fugitive dust generated from the mine:
L Exposed areas will be stabilized to prevent wind erosion and to provide screening.
Stabilization includes vegetation for reclaimed areas and bcrms, and watering for short
term exposed areas such as haul roads and the pit floor.
2. Water spray bars and similar systems will be used in conveyor systems, crushing
systems, and screening systems
3. Limit drop heights of gravel throughout the operation
4. Limit on-site vehicle speeds
5. Treat frequently traveled roadways on-site with stabilizers and/or watering to minimize
re -entrainment of dust fom the surface of the road
6. Minimize dust from loaded haul trucks by covering as necessary
7. A minimum 30 -foot setback from mining activity to the property line to allow the dust to
settle. Some activities, such as berm construction, may take place closer to the property
boundary, as needed.
8. Emission controls and limits as required by CDPHE will be enforced and followed
9. Construction berms and mine highwalls as wind breaks
10. Reclaim areas as soon as mining is completed in them
Berming and Screening Plan
The Cerise Gravel Pit will use berms to reduce the impact of mining operations on neighboring
properties. The following maps show the arrangement of berms with respect to the current
topography and an aerial image of the site:
1. Berming, Screening, & Buffering Plan
2. Bcrming, Screening, & Buffering Plan 2
The first set of berms will consist of the topsoil berm along the southwest portion of the site and
the overburden stockpile immediately northeast of Phase 1 mining. These berms will be
constructed with material from the initial stripping of the Phase 1(A -C). Topsoil will also be
stripped from the overburden stockpile area prior to its construction to preserve said topsoil for
later. This arrangement of berms and piles will obscure most of the initial mining activity from
neighbors to the north and east. Neighbors to the south are substantially lower vertically, and
therefore do not need additional screening.
Once mining is complete in Phase 1, the overburden pile will be used to backfill Phase 1A and
part of Phase 1B. Some overburden from this pile will be used to build a long overburden berm
along the north side of Phases 1B, 1C, and 2. This berm will stay in place throughout the
remaining mine life. While the neighbors to the north will be able to see some mining activity,
the overburden berm will minimize that impact. The overburden berm will be 15 feet tall, and
mining activity will be taking place in the pit bottom.
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A much taller overburden berm would block the view of more mining operations during Phases
2-4, but such a berm would be so Targe as to be a visual impact itself. Additionally, it is the
experience of the operator (United) that Targe overburden piles and berms do not develop
vegetation as well as topsoil piles, and therefore stand out more from the surrounding landscape.
By using a moderately size berm, combined with keeping mining and processing activities on the
pit floor, United feels it has struck a quality balance between screening the view of activity and
the generating additional visual impact with the screening itself.
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