_PERMIT FILE - M1981302 ‎(34)‎

• Permit No: M1981302
• IBM Index Class Name: Permit File
• Doc Name: FIGURE G-2 MAXIMUM ESTIMATED DUST EMISSIONS FROM GRAVEL PRODUCTIONS AT DEEPE FARM PROJECT
• Media Type: D
• Archive: No

produce local and intermittent increases in ambient
concentration of total suspended particulate. However,
the impacts will be within allowable levels , and are
expected to be significant only very close to the oper-
ations and for limited time periods of adverse meteorolog-
ical conditions.
It is useful for perspective to compare the expected mining
impacts to other familiar sources of airborne dust. Agri-
cultural tilling assuming 4 tillings per year of 168 acres
of typical eastern Colorado farmland during a growing
season generates approximately 10 tons of suspended dust.
Twenty automobiles per day traveling at 40 mph along 3
miles of rural dirt road will produce approximately 44 tons
per year of dust2. When these quantities are compared to
the estimated maximum emission of 35 tons per year from
the Deepe Farm project, it can be seen that expected dust
emissions are of the same scale as those which normally
occur throughout Boulder County from typical rural activities .
The impacts of gravel mining on surrounding residents and
property will be reduced because of a number of factors.
•
2U.S. Environmental Protection Agency, 1975: Compilation
of Air Pollutant Emission Factors , AP-42. Research
Triangle Park, N.C.
G-14