Stormwater control measures (CMs), also referred to as Best Management Practices (BMPs), play a critical role in preventing sediment, debris, and pollutants from leaving a construction site. However, simply installing a control measure does not automatically mean it is functioning properly. Regular inspections and maintenance are necessary to ensure these controls continue to perform as intended.
In previous blogs we’ve gone over the different types of BMPs. In this blog we will walk through the signs of both effective and failing stormwater controls. Being aware of these signs can help construction teams stay compliant, reduce erosion risks, and avoid costly corrective actions.
What Are Stormwater Control Measures?
Stormwater control measures are temporary or permanent features designed to manage runoff and reduce pollution. Common examples include:
- Silt fence
- Inlet protection
- Vehicle tracking controls
- Wattles and check dams
- Sediment basins
- Stabilized construction entrances
- Vegetation and seeding
Each control measure serves a specific purpose, and its effectiveness depends on proper installation, placement, and maintenance.
Signs Your Stormwater Controls Are Working
Sediment Stays Contained
One of the clearest signs of an effective BMP is that sediment remains on-site. If sediment is collecting behind a silt fence, wattles are slowing runoff, or inlet protection is preventing debris from entering storm drains, the controls are likely functioning properly.
No Evidence of Offsite Discharge
Stormwater controls should prevent muddy water, debris, or pollutants from leaving the project boundaries. One thing to look for is clean discharge points and ensure nearby roadways, sidewalks, and storm drains remain free of sediment buildup.
Controls Remain Stable After Storm Events
After rainfall or snowmelt, BMPs should remain in place and structurally intact. Leaning silt fence, displaced wattles, or damaged inlet protection may indicate the control is overwhelmed or improperly installed.
Water Flow Appears Controlled
Runoff should move slowly and predictably through the site. Signs of uncontrolled flow—such as gullies, rills, or erosion channels—often indicate the current control measures are not sufficient for site conditions.
Vegetation Is Establishing Successfully
On stabilized areas, healthy vegetation growth is a strong indicator that erosion control measures are working. Bare soil, washouts, or patchy growth may suggest the area requires additional stabilization or maintenance.
Common Signs of Failing BMPs
Even properly installed controls can fail over time if they are not maintained. Common warning signs include:
- Sediment bypassing controls
- Torn or downed silt fence
- Excessive sediment accumulation
- Standing water where drainage should occur
- Erosion or rilling around or beneath controls
- Clogged inlet protection
- Damaged tracking pads or sediment trackout
When these issues are identified, corrective actions should be documented and addressed promptly to maintain compliance.
Why Routine Inspections Matter
Routine stormwater inspections help identify small issues before they become larger compliance problems. Weather conditions, changing site grades, and ongoing construction activity can all affect BMP performance over time.
Inspections also help confirm that stormwater controls continue to match current site conditions. As projects evolve, control measures may need to be relocated, repaired, or upgraded to remain effective.
The Importance of Maintenance
Even the best stormwater controls require maintenance. Sediment removal, repairs, reseeding, and replacing damaged materials are all part of keeping a site compliant. A BMP that is installed correctly but never maintained will eventually lose effectiveness.
Consistent maintenance not only improves site performance but also helps protect downstream waterways and reduce the risk of regulatory violations.
Final Thoughts
Stormwater control measures are only effective if they continue functioning as designed throughout the life of a project. Regular inspections, timely maintenance, and proactive adjustments all play a role in preventing erosion and protecting water quality.
By understanding what working BMPs look like—and recognizing early signs of failure—project teams can stay compliant, reduce environmental risk, and keep construction moving forward.
If your project needs support with stormwater inspections, BMP evaluations, or SWMP compliance, Summit Services Group can help.