City of Madison

City of Madison Engineering | Photo Credit: Archie Nicolette

Examples of Erosion Control Practices: The Good, Bad and OK

Categories:


Tracking Control

Improper Tracking Control

No Tracking Control

BAD: Tracking pad in poor condition or not in place and/or needs scraping & street sweeping

Pavement Clean

Tracking Control

GOOD: Pavement has been swept after tracking and tracking pad installed at construction entrance

Tracking Pad Missing

Construction Entrance Tracking Pad

BAD: There is no visible tracking pad (clear stone drive to knock dirt off tires as trucks exit construction site)

Tracking Pad

Tracking Pad

GOOD: Installed properly, well-maintained

Tracking Pad Needs Maintenance

Tracking Pad

OK: Installed properly, needs maintenance

Sediment on Sidewalk

Sediment on Sidewalk

BAD: Sediment needs to be cleaned up as soon as possible. At a minimum,  must be cleaned by the end of the work day.


Perimeter Control

Silt Fence

Silt Fence

OK: Practice installed properly, needs maintenance

Silt Fence - Bad

Silt Fence

BAD: Installed across channel; first major storm will blow out the silt fence

Silt Fence - Bad

Silt Fence

BAD: Installed incorrectly; should be taught and dug in at bottom to prevent sediment movement underneath. Needs to be on the project perimeter or a second row installed behind the sidewalk.

Silt Fence - Bad

Silt Fence

BAD: Installed parallel to flow of stormwater; should be installed perpendicular to flow

Silt Fence Damaged

Silt Fence

BAD: Needs to be repaired; driving over silt fence undermines its integrity


Inlet Protection

Improper Inlet Protection

Improper Inlet Protection

BAD: Silt fence at end of culvert is not proper "end of pipe protection". It should be a stone weeper or staked wattle.

Plugged Inlet

Plugged Inlet

OK: Practice installed properly, needs maintenance (this is why inlet protection is used)

Type C Inlet Protection

Type "C" Inlet Protection

GOOD: Installed correctly. Fabric should extend beyond grate to provide for proper maintenance and removal.

Type D Inlet Protection

Type "D" Inlet Protection

GOOD: Installed correctly and is functioning


Surface/Slope Protection

Wrong Mat Choice

Channel Erosion Mat

BAD: Wrong choice of fabric for channelized flow

Improperly Applied Mulch

Straw Mulch

BAD: Improperly applied; needs to be crimped in place

NonChannel Erosion Mat

Non channel erosion mat

GOOD: Installed correctly

Unprotected Slope

Unprotected Slope

BAD: Requires erosion control matting, or this slope will become severely eroded


Flow Interruption/Sedimentation

Ditch Check & Wattles

Ditch Check & Wattles

OK: Correctly installed but needs maintenance

Clear Stone Weeper

Clear Stone Weeper

GOOD: Installed properly to promote sediment settlement prior to discharge

Straw Bales

Sediment Straw Bale Barrier

GOOD: Installed properly to reduce runoff velocity.

Bad Straw Bale Install

Sediment Straw Bales

BAD: Installed incorrectly; needs to be perpendicular to line of flow to capture sediment and extended far enough to prevent flow around the end of the line of bales.


Dewatering

Improper Dewatering

Dewatering

BAD: Inlet protection is NOT dewatering treatment (requires special bags instead)