Draft Environmental Impact Statement for Roca Honda Mine

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Chapter 3. Affected Environment and Environmental Consequences during mine operation and reclamation. The proposed action would not exceed the de minimis thresholds under the general conformity rule, or contribute to a violation of any state, Federal, or local air regulation. An overview of the impacts to air quality is outlined in table 24. Table 24. Levels of impact for air quality Magnitude Duration Extent Likelihood Minor to Moderate Minor to Moderate Minor to Moderate Minor to Moderate Mine Development Precedence and Uniqueness Short term Small Probable Slight or Moderate Medium term, intermittent, or short term Mine Operation Small Probable Slight or Moderate Mine Reclamation Short term Small Probable Slight or Moderate Medium term, intermittent, or short term General Effects to Air Quality Overall Small Probable Slight or Moderate Impact Rating Insignificant Insignificant Insignificant Insignificant The general effects of mine development, operation, and reclamation on air quality are outlined below. Mine Development. Mine development would consist of a number of activities that have the potential to create air emissions over an approximate 3.6-year period. These activities include: Drilling and Blasting. During the excavation of two production shafts and one secondary escape route, drilling and blasting would contribute short duration releases of fugitive dust. As needed, water would be used to control dust emissions. Surface disturbance and roadway fugitive dust. The ground surface would be disturbed to create room for support facilities, soil and rock stockpiles, ore pads and stockpiles, parking, equipment delivery and storage, vehicle parking, and an escape raise. A 5.5-mile water pipeline would also be sited for water treatment plant use. Mobile equipment exhaust. Gasoline and diesel-powered mobile equipment would be used for mine development. Emissions would be generated from tailpipe exhaust both underground and on the surface. Notably, exhaust emitted underground would be released with ventilation air. Mine development emissions 186 DEIS for Roca Honda Mine, Cibola National Forest
Chapter 3. Affected Environment and Environmental Consequences are expected to have a minor impact on air quality due to the remote nature of the site, the limited number of vehicles, and the temporary nature of the activity. Backup electric generator exhaust. Portable generators would be used for the initial portal site and underground development work. An emergency generator would be placed at the escape raise upon completion of that feature. Impacts of emissions on the environment are expected to be negligible due to the remote nature of the site and intermittent generator use. Fuel and chemical storage and use. Fuels, explosives, and chemical storage would comply with any applicable fuel storage and fuel dispensing air quality regulations. Chemicals for water treatment and solvents used for maintenance/parts cleaning would be kept in closed containers when not in use. Mine Operation. Mine operation would consist of a number of activities that have the potential to create air emissions and. These activities include: Mobile equipment exhaust. To the extent possible, electrically powered tools and equipment would be used for mining. Some mobile equipment powered by gasoline or diesel fuel would be used, resulting in some combustion emissions. Additionally, 50–60 ore trucks per day would be used to haul ore (1,000 tons/day) to an offsite processing facility. It is anticipated that mobile equipment exhaust would not have a significant impact due to the remote nature of the facility. Fuel and chemical storage and use. Fuels, explosives, and chemical storage would comply with any applicable fuel storage and fuel dispensing air quality regulations. Chemicals for water treatment and solvents used for maintenance/parts cleaning would be kept in closed containers when not in use. Backup electric generator exhaust. An emergency generator would be placed at the escape raise. Impacts of emissions on the environment are expected to be negligible due to the remote nature of the site and intermittent generator use. As such, these would be temporary emission sources for which there is expected to be no impact. Disturbed surface wind erosion, paved and unpaved fugitive road dust. Approximately 183 acres of surface within Sections 9, 10, and 16 would have the potential to be disturbed to create room for support facilities, waste rock placement, ore and growth medium storage, equipment storage, vehicle parking, and an escape raise. Two existing roadways are in the planning stages for upgrades which include widening to 60 feet and gravel surfacing. These activities would generate some amount of fugitive dust. Transport of mineralized ore. Ore stockpiles would be sprayed with water to minimize the amount of dust generated during loading operations. Water sprays would be applied as necessary to moisten the ore and ore pad area. Ore transport trucks would meet Federal and State standards for the transport of uranium ore, including covering and labeling. DEIS for Roca Honda Mine, Cibola National Forest 187
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United States Department of Agricul
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Environmental Impact Statement for
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Summary Roca Honda Resources, LLC (
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• Potential effects on the charac
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Mine Operation Summary Mine operati
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Resource Impacts and Mitigation •
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Resource Impacts and Mitigation num
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Contents Chapter 1. Purpose of and
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Contents Table 29. State of New Mex
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Contents Table 94. Food stamp enrol
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Contents Figure 66. Aerial image of
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H1N1 Influenza A virus, subtype H1N
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STD sexually transmitted disease SW
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Chapter 1. Purpose of and Need for
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Chapter 2. Alternatives, Including
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Land Use Chapter 2. Alternatives, I
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Treated Water Discharge in an Alter
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Table 3. Impact comparison matrix T
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Topic Alternative 1 - No Action Res
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Vegetation Topic Alternative 1 - No
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Topic Alternative 1 - No Action Sen
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Topic Alternative 1 - No Action Rec
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Topic Alternative 1 - No Action Cul
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Transportation Topic Alternative 1
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Topic Alternative 1 - No Action Hum
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Topic Alternative 1 - No Action Leg
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Other Actions and Projects Consider
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Marquez Canyon Exploration Current
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Chapter 3. Affected Environment and
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Figure 33. Permit area watershed an
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Table 40. Impact characterization f
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Transportation Chapter 3. Affected
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Figure 57. Nearby recreation sites
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Table 41. Impact characterization f
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Minority Populations Chapter 3. Aff
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Figure 58. Distribution of minority
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High school graduates, percent of p
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Earnings Chapter 3. Affected Enviro
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Public Finance Chapter 3. Affected
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providing an estimate of the “rip
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Tax Revenue Chapter 3. Affected Env
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Table 61. Household characteristics
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Tribal History Chapter 3. Affected
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Natural Resources Chapter 3. Affect
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Physical APE Chapter 3. Affected En
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Agricultural Fields Chapter 3. Affe
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• Removal of a property from its
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Impacts to Natural Resources with C
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Site No. Project Section Land Statu
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Visual Resources Affected Environme
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Figure 64. View looking north from
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Alternative 1 Chapter 3. Affected E
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Environmental Consequences Chapter
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New Mexico 1.11 (0.98 - 1.25) Cibol
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Magnitude Descriptor Precedence or
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Noise Chapter 3. Affected Environme
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Resource Area Cultural and Historic
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Cumulative Effects Chapter 3. Affec
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Chapter 4. Consultation and Coordin
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Chapter 4. Consultation and Coordin
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Glossary Air-Quality Control Region
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References Cited (ACHP, 2005). Advi
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References Cited (Basin Coordinated
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References Cited (Brugge et al., 20
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References Cited (Census, 2011). U.
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References Cited (DesertUSA, 2011).
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(NatureServe, 2010a). NatureSevere.
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References Cited (RHR, 2011a). Roca
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References Cited (USEPA, 1975). U.S
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References Cited (USFWS, no date).
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References Cited (WildEarth Guardia
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Index E economic impacts - 15, 73,
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Index N National Environmental Poli
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Index W waste - 18, 40, 46, 56-57,
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Draft Environmental Impact Statement for Roca Honda Mine

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