PERMFILE61130

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: Exhibit 25c Pavement Evaluations & Recommendations, Haul Road B
• Media Type: D
• Archive: No

APPENDIX A
DESIGN CALCULATIONS
Structural Number Verification
(AASHTO Desigo of Pavement Structure - 1986)
Traffic: Design 18 kip ESAL: 120,000
Reliability: SO percent
Overall Deviation: 0.40
Soils: Resilient Modulus 5000 psi
• PSI Loss Due To Traffic: 2,p
Required Structural Number = 2.26
Required Gravel Section
Minimum Structural Number(MSN) required = 2.26
Gravel Section Required, using 4 inches of new base course and 19 inches of e~osting gravels = >
(2.26 - 3(0.14) - 19(0.06))/0.10 = 5.6 = >
Use 6 inches of pit run subbase gravels and 4 inches of road base gravels.
J