Forest Road Surfacing: Basic Design Principles and Applied Practices
Location: Coeur d'Alene, ID
Thursday, November 8:
8:30 Introduction, Expectations, and Workshop Overview
9:00 Common Road Surfacing Issues
- The What, Where, and When Factors: Geology, Soils, Aggregate, Road Prism and Maintenance.
- How They Make a Difference in Costs, Water Quality and Safety?
10:00 Break
10:30 Soils Engineering – Relating Basic Properties to Road Surface Design
Subgrade
- Soil Classification
- Soil Moisture Content and Density
Noon Lunch (included with registration)
1:00 Soils Engineering – Relating Mechanical Properties to Road Surface Design
- Potential Soil Strength vs. Actual Soil Strength
- Geosynthetics
- Subgrade Stabilization
2:30 Break
3:00 How to Access Local Rock Sources
- Geology Considerations
- Rock Source Suitability
- Rock Classification Methods
- Aggregate Production and Development
5:00 Adjourn
Friday, November 9:
8:00 Does the Rock Meet My Needs?
- Gradation
- Durability
- Dust Abatement
- Recycling Aggregate
- Use of RAP
9:30 Break
10:00 Commonly Used Aggregate Design Methods
- AASHTO 1993 – Rut Equation
- USDA Forest Service – STP
- OR Dept. of Forestry Surfacing Guidance
- Using What Has Worked in the Past
Noon Lunch (included with registration)
1:00 Surfacing Design Example Problems
- Year-round Haul
- Seasonal Haul
- Restricted Haul
2:30 Break
3:00 Road Surfacing BMPs and Sediment Reduction
- Mechanics of Sediment Production from Forest Roads
- Mitigating Surfacing Erosion
- BMPs
4:00 Summary and Q&A
4:30 Adjourn
About the Speaker:
Rene’ Renteria is a civil/geotechnical engineer with over 30 years of experience in pavement and geotechnical engineering, with the USDA Forest Service and including 10 years with the Oregon DOT. His current responsibilities include pavement and materials engineering for both paved and unpaved roads on the national forests in Oregon, Washington, and Alaska.