The LID Inspection and Maintenance Challenge


In recent surveys conducted by CSN, local stormwater managers have expressed major concerns about the long term maintenance of low impact development (LID) practices, and the lack of inspection protocols for small-scale practices. Clearly, most communities will have many, many more small practices to report, track, inspect and verify.

The same communities will soon get more prescriptive MS4 permits that will require ongoing maintenance inspection for their entire best management practices (BMPs) inventory in a single permit cycle. In addition, localities may soon have to improve their BMP reporting, tracking and reporting to maintain pollutant reduction credits for the Bay pollution diet or total maximum daily load (TMDL), and given the state of most local stormwater budgets, they are not likely to get additional staff resources to get the job done. This will require a transition to a new model for efficiently inspecting and maintaining LID practices over their entire life cycle.

As part of our Chesapeake Bay Stormwater Training Partnership program, CSN and partners have developed technical resources to help localities better deal with this seemingly overwhelming task.

View Resources

Howard County collageThe Chesapeake Bay Stormwater Training Partnership regularly conducts FREE Inspection & Maintenance training workshops for Bay jurisdictions on how to maintain, inspect, report, track and verify stormwater BMPs to comply with MS4 permits and the Bay TMDL. Participants learn about CSN’s very own Visual Indicator approach towards inspecting BMPs either during routine maintenance or routine regulatory inspections in order to ensure that the LID practices are up to speed and functioning as designed. We also discuss what to look for when a practice is being constructed and what to do when you find a major problem with one of your stormwater BMPs after installation. Workshop training materials can be downloaded below. To schedule a similar workshop for your jurisdiction, contact us today!

Inspection & Maintenance Workshop Presentations

Compiled presentations on Inspection & Maintenance Training.

Version october 29, 2015 | Size (23 MB) | File type (.pdf) | Download


The Chesapeake Stormwater Network is pleased to announce the release of our 3-part instructional video series on Low Impact Development construction, installation and maintenance:

All of these videos can be accessed on our YouTube channel here.


Bioretention Illustrated: A Visual Guide for Constructing, Inspecting, Maintaining and Verifying the Bioretention Practice

Version final version. version 2.0; october 20, 2013 | Size (8 MB) | File type (.pdf) | Download

Final Recommended Guidance for Urban Stormwater BMP Verification

This memo describes how the work group developed guidance to verify the performance of urban BMPs in the Bay watershed.

Version august 11, 2014 | Size (637 KB) | File type (.pdf) | Download

Conventional BMP Maintenance Presentation

Building a local program to maintain your stormwater practices and prevent pollution from your municipal operations.

Version pdf | Size (4 MB) | File type (.pdf) | Download

Visual Indicators Form

Visual Indicators Form

Size (309 KB) | File type (.pdf) | Download

Check out our Bioretention Illustrated App to streamline and expedite your inspections!

Archived Webcasts on Maintenance

[Webcast] Inspecting, Maintaining and Verifying LID Practices

[Webcast] Visual Indicators for Infiltration, Surface Sand Filters and Permeable Pavement

[Webcast] Visual Indicators Part II: Filter Strips and Grass Channels


LID Changes Everything: The New Stormwater Maintenance Paradigm

Listen to Archived Webcast