Prefeasibility Access Road Design-Revised
35
WARREN PEAK WATER APPLICATION
INTENSITY
FOR DUST SUPPRESSION
Warren Peak Route is a 9.4mile route that consists of 2.6miles of unpaved road and 6.8miles of paved road.
TABLE 3
Unpaved Water Suppression
Rearranged to isololate i/t
i/t = (0.8*p*d)/100-C
Control of Fugitive Dust Sources, EPA-450/3-88-908, Eq. 3-2 (1988)
t = time between applications (h)
Paved Water Supression
Water Flushing
C = 69 - 0.231 * V
Water Flushing with Sweeping
C = 96 - 0.263 * V
Control of Fugitive Dust Sources, EPA-450/3-88-908, Table 2-4 (1988)
C =Max Control Efficiency
Based on water applied at 0.48 gal/yd
2
V = Number of Vehicle Passes Between Applications
Assuming one application a day
WARREN PEAK ROUTE - UNPAVED ANNUAL AVERAGE
Control Efficiency
(%)
[C]
Annual Hourly Daytime
Evap. Rate (mm/h)
[p]
1
Hourly Daytime
Traffic Rate
(passes/hr)
[d]
2
Application
Intensity
(L/m
2
-h)
[i]
Application
Intensity
(gal/ft
2
-h)
3
Application
Volume
(gallons/day)
4
- INIITAL
UNPAVED
Application
Volume
(gallons/day)
4
- FINAL
UNPAVED
50
7.47
0.58
0.07
0.0017
14,410
24,509
75
7.47
0.58
0.14
0.0034
28,820
49,018
90
7.47
0.58
0.35
0.0086
72,051
122,546
WARREN PEAK ROUTE - UNPAVED SUMMER AVERAGE
5
Control Efficiency
(%)
[C]
Annual Hourly Daytime
Evap. Rate (mm/h)
[p]
1
Hourly Daytime
Traffic Rate
(passes/hr)
[d]
2
Application
Intensity
(L/m
2
-h)
[i]
Application
Intensity
(gal/ft
2
-h)
3
Application
Volume
(gallons/day)
4
- INIITAL
UNPAVED
Application
Volume
(gallons/day)
4
- FINAL
UNPAVED
50
9.91
0.58
0.09
0.0023
19,115
32,512
75
9.91
0.58
0.18
0.0045
38,231
65,024
90
9.91
0.58
0.46
0.0113
95,577
162,561
Annual Weighted Daily
Average - Application
Volume Per Day
Initial Build
Annual Weighted
Daily Average -
Application Volume
Per Day
Final Aggregate
50%
17,569
29,881
75%
35,137
59,762
90%
87,843
149,405
i = application intensity (L/m2)
WATER APPLICATION INTENSITY FOR DUST SUPPRESSION
C = 100 - (0.8*p*d*t) /i
→
C = average control efficiency (%)
p = potential average hourly daytime evaporation rate (mm/h)
d = average hourly daytime traffic rate (passes per hour)
