erosion & sediment control. wind erosion water erosion
TRANSCRIPT
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Erosion& Sediment Control
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Wind Erosion
Water Erosion
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Who is required to obtain a permit?Who is required to obtain a permit?
• Any individual or entity involved in disturbing one acre or more of land is required to obtain a permit from OR-DEQ or its authorized agent
• At the local level, erosion permit requirements and/or ordinances can be stringent
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Type of permits availableType of permits available
• NPDES, General 1200-C Permit (private individuals and entities in the construction business)
• NPDES, General 1200-CA Permit (Public Agencies only)
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Common QuestionCommon Question
• Can local agencies use ODOT’s permit?– No, local agencies cannot use ODOT’s 1200-
CA permit – Local agencies should obtain a 1200-C/CA
permit from OR-DEQ or its authorized agent (City, County, etc.) when working on a project with 1 or more acres of disturbance
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How can I get a permitHow can I get a permit
• By filing an application with OR-DEQ or it’s authorized agent such as a city or a county
• Requirements: – Completed application– Signed LUCS* from the City or County– Erosion and Sediment Control Plan (ESCP) – Fees
* Land Use Compatibility Statement
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How do I comply with permit How do I comply with permit requirements?requirements?
• Prepare a good ESC Plan– Consider location (proximity to waterways), soil conditions,
topography, climatic conditions, time and duration of project, etc
• Implement the Plan– Prepare a schedule and implement measures as per
schedule• Inspect and maintain ESC measures as needed on a
regular basis– Rely on knowledgeable inspectors and maintenance crew– Inspect measures before and after storm events
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Basic Planning ConsiderationsBasic Planning Considerations
• Prevention (Source Control)– Fit site construction to the terrain– Preserve natural vegetation to the extent
possible– Time grading to minimize exposure– Phase work to limit disturbed area
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Basic Planning Considerations Cont.Basic Planning Considerations Cont.
• Control Methods– Divert runoff away from work area– Cover exposed areas ASAP– Minimize length and steepness of slopes– Reduce runoff velocities– Prepare drainage ways and outlets– Trap sediment on site
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Basic Planning Considerations Cont.Basic Planning Considerations Cont.
• Inspection, Maintenance, Documentation, and Reporting– Inspect measures in place after storm
events– Replace or repair measures immediately or
as soon as possible– Document inspection observations– Report/Retain documentation on site
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Wind ErosionWind Erosion
• It is very important to consider dust controls (during summer months in the West and year round East of the Cascades)
• Project location dictates the need for the extent of dust controls (sensitive areas) – Near water bodies-Environmental Issues– Near residential homes-Health & Safety Issues– Near Highways-Safety Issues
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Dust Control
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Dust Control
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Dust Control
Typical Dust Control Measures• Vegetative cover
• Irrigation
• Mulch
• Spray-on adhesives
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Mulch & HydroseedMulch & Hydroseed
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Spray-on adhesiveSpray-on adhesive
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Water ErosionWater Erosion
• Important in Oregon (West of the Cascades) because of:– Climatic conditions (7-9 months of rain)– Water bodies (large numbers) – Topography (hilly terrain)– Types of Soils (significant amount of clay
soils)– Amount of rainfall (average of 40”)– Fish & Aquatic resources
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Temporary Slope Drain
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Mulch & HydroseedMulch & Hydroseed
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Stabilized Construction Entrance
Stabilized Construction Entrance
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Storm Drain Inlet Protection
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Soil Stabilization Blankets and Matting
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Temporary Sediment Basin
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ODOT:ESC-RESOURCESODOT:ESC-RESOURCES
• Standards & Specifications– Section 00280-ESC – Section 01030-Landscaping– Section 01040-Planting
• Erosion Control (EC) Manual– Guidance for internal & external staff
• ESC Processes• ESC BMP’s• ESC Design Guidelines
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ODOT:ESC-ResourcesODOT:ESC-Resources
• Erosion Control Field Manual– Simple and portable format of EC manual
• ESC BMP Guidance• ESC Inspection Guidance• Landscape Guidance
• Qualified Products List– List of ODOT approved ESC products
• Products have been reviewed by ODOT staff for ODOT applicability before they are put on the list
• Only products on this list should be used on ODOT projects unless otherwise approved by PM
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ODOT TrainingsODOT Trainings
• Erosion and Sediment Control/Environmental Trainings offered every year
• Two or more training each year• If there is enough interest more may be
arranged
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Raghu NamburiODOT-Erosion and Landscape Program
CoordinatorGeo-Environmental Section
355 Capitol Street, NE, Suite 314ASalem, OR-97301(503) 986-3551