- Awards and Recognition
- Annual Reports
- Barrier Aesthetics
- Blue Star Memorial Highways
- Classified Landscaped Freeways
- Community Identification
- Context Sensitive Solutions
- Erosion Control Toolbox
- Gateway Monuments
- Highway Planting
- Mission Bells
- Nonstandard Specification Info
- Policy, Manuals and Procedures
- Roadside Toolbox
- Safety Roadside Rest Area System
- Scenic Highways
- Standard Specifications and Plans
- Transportation Art
- Visual Impact Assessment Outlines
- Visual Impact Assessment Training
- Water Conservation
Erosion Control Toolbox
To Combine Specifications
Planning & Design
Improve Soil Health
- Soils Testing
- Local Topsoil
- Imported Topsoil
- Roughen Soil Surface
- Stepped Slopes
- Contour Grading and Slope Rounding
- Decompact Soil
- Soil Nutrients
- Incorporate Materials
Improve Soil Health & Provide Cover
Short Term Cover
Long Term Cover
Steep Slope Techniques
- Stepped Slope
- Cellular Confinement
- RECP Flap
- RECP Flap with Brush Layering
- RECP Wrap
- Soil Filled RSP
- Wire Blanket
- Wire Mesh Confinement
- Plant Selection
- TransPlant Application
- Noxious and Invasive Species
- Drill Seed
- Dry Seed
- Native Grass Sod
- Brush Layering
Low Impact Development
- Sidewalk Stormwater Planter
- Sidewalk Stormwater Tree Trench
- Parking Stormwater Planters
- Permeable Paving
- Additional Resources
What is This Treatment?
Mulch work involves placing a blanket of organic material on fill slopes, cut slopes, and other disturbed roadside areas to reduce erosion and reduce weed competition. Mulch is typically applied from 2" - 3" deep.
The mulch specification allows the designer to select from the following materials:
- Composted green material.
- Tree bark.
- Wood chips.
- Coarse woody grindings.
- Pine needles.
- Shredded bark.
- Wood chips, tree bark, or a combination of both.
When to Use This Treatment:
- Typically applied on slopes 2:1 (H:V) and flatter.
- Use to reduce raindrop splash erosion and competition from weeds.
- Typically applied 2"-3” deep (270-400 cubic yards/acre).
Improved protection from raindrop splash erosion.
Reduced competition from weed species.
Reduced stormwater runoff volume and velocity.
Improved infiltration rate.
- Conserves soil moisture.
Improved potential for vigorous long term vegetation coverage.
- Easy application by pneumatic blower trucks or bulldozers (in flat areas).
- Requires temporary storage space within the project limits to stockpile materials.
Applying high levels of organic materials may not be appropriate in arid regions of the state.
Functional longevity of less than three years.
Mulch Quantity Calculator
- 2010 Standard Specifications (See Section 20-7.02D(6) and 20-7.03(I) Mulch)
- 2010 Revised Standard Specifications (RSS)
Consider Using With:
To effectively treat sites with poor soils (compacted, nutrient depleted, or poorly draining), consider combining this treatment with:
Plans and Details:
Specify Mulch in the Erosion Control Legend:
- Click here to view current awarded bid prices for Mulch.
- Click here for a 1997 cost survey of Erosion Control pricing.
- Use BEES code 202011, Mulch.
- David Steinfield, Scott Riley, Kim Wilkinson, Thomas D. Landis, Lee Riley, et al. 2007. "Roadside Revegetation, An Integrated Approach to Establishing Native Plants" Accessed 2009-07-16
- Michael Hogan, 2009. "Sediment Source Control Handbook, An Adaptive Approach to Restoration of Disturbed Areas" Accessed 2009-07-16.