Post-construction BMP inspections

Horry County must address post-construction stormwater runoff from new development and redevelopments that disturb one or more acres. This is done by requiring developments to mitigate stormwater impacts by using practices to treat, store, and infiltrate runoff on site before it can affect water bodies downstream. This is commonly achieved by using stormwater retention ponds.

Periodically, Horry County will inspect all stormwater drainage ponds or best management practices (BMPs). HOAs can participate in these inspections by providing current HOA contact information to Horry County Stormwater. The inspection will evaluate the BMP as an engineering structure. Common problems may include: structural damage to pipes, pond banks, or outfall structures; vegetative growth blocking inflow or outflow pipes; erosion problems; or failure of the outfall weir structure.

HOAs can prepare themselves for these inspections by obtaining a copy of the as-built drainage plans for the development and by routinely inspecting their stormwater systems and performing needed repairs as needed. For a self-inspection checklist, click here.

Inspection Process...


Step one...The Notification

The HOA will receive a letter from the Project Manager of the area notifying them of the pending inspection. on it there will be contact information of the Project Manager in the event you would like to join him during the inspection.

Step Two...The Visit

In a public subdivision the project manager will be looking for things like:

  • Erosion on pond banks and around pipe outfalls and infalls
  • Debris around weir structures which would hinder the operation of the structure
  • The condition of the weir structure
  • If the outfall ditch is clear for positive flow
  • Depth of the pond (ponds are to be min 3-4 feet deep)
  • Percentage of aquatic vegetative cover on the pond. 

Note: The county's interest is focused primarily on the structural integrity of the system and its function and less on aesthetic appeal.

In a private subdivision the Project Manager will be looking for things like:

  • The same above items found in public subdivisions
  • Check if catch basins are clean and free of debris.
  • A sample inspection of pipes to see if they are clean and free of debris

Note: Items not within a county easement or right-of-way are the responsibility of the HOA.

Step Three...The Report

The project manager will compile a report of items, if any, which needs attention within the subdivision. If items are in need of addressing an Out Of Compliance report will be sent to the HOA with a description of what needs to be done and a reasonable time frame of which to do it. The county would be happy to assist in a consultative manner during this process.

Step Four...The follow up

Once the issues have been addressed the HOA will notify the project manager and the project manager will set up a meeting to have  the work inspected.

If there is no issues found and the subdivision is in proper working order the project manager will either call if a phone number is available or write a letter of compliance to the HOA confirming a passing report. This will trigger a cycled inspection to occure every 5 years from the date of completion. If the issues have not been completely addressed Step Three will be repeated until all items have been completed.