FREQUENTLY ASKED QUESTIONS

BMP stands for Best Management Practice a stormwater control measure designed to manage runoff quantity, improve water quality or both. Common BMPs include bioretention cells, rain gardens, dry swales, infiltration trenches, wet ponds, and underground detention systems. If your property was developed or redeveloped after Virginia's stormwater regulations took effect, it likely has one or more BMPs that are required to be maintained under a recorded maintenance agreement.

Yes. In Northern Virginia, privately owned BMP facilities are subject to recorded maintenance agreements that require regular inspection, maintenance and documentation. These obligations run with the property and are enforceable by local stormwater authorities. Failure to maintain your BMP can result in inspection findings, notices of violation and mandatory corrective actions.

Inspection and maintenance frequency varies by BMP type, local jurisdiction and the terms of your recorded maintenance agreement. Most jurisdictions in Northern Virginia require annual inspections at minimum. Some facilities require more frequent maintenance depending on drainage area, sediment loading and system type. Capital Stormwater Services reviews your maintenance agreement and establishes a maintenance schedule tailored to your facility and local requirements.

Your recorded plat, deed of dedication, stormwater maintenance agreement or approved site plan should identify the type, location and design specifications of any BMP facilities on your property. If you are unsure, Capital Stormwater Services can conduct a site visit, review available records and identify your facility type, applicable maintenance requirements and current condition.

Our inspection reports document facility identification and BMP type, sediment accumulation levels, outlet structure condition, embankment and slope stability, inlet and conveyance conditions, access conditions, identified maintenance concerns, priority-ranked maintenance recommendations and comprehensive field photography. Reports are prepared for owner, property manager and county compliance records.

Stormwater BMP maintenance obligations are typically recorded in a deed of dedication, easement or maintenance agreement that runs with the property meaning they transfer to the new owner at closing. Buyers should review stormwater maintenance agreements during due diligence. Sellers should ensure maintenance records are current and available for transfer. Capital Stormwater Services can conduct a pre-sale or pre-purchase facility inspection and provide a documented condition report.

A forebay is a small settling basin at the inlet of a wet pond, bioretention cell or detention facility designed to capture coarse sediment before it reaches the main treatment area. Forebays fill with sediment over time and require periodic cleanout to maintain their design storage volume and protect the performance of the primary facility. Most Virginia design standards recommend forebay cleanout when sediment reaches 50% of design volume.

Sediment accumulation thresholds vary by BMP type and local design standards. For forebays, most Virginia design standards require cleanout when sediment reaches 50% of the forebay's design storage volume. For bioretention media surfaces and underground vaults, any significant accumulation that reduces infiltration or storage capacity warrants attention. Our inspection reports identify accumulation levels and recommend cleanout when thresholds are approaching or exceeded.

In most cases, yes. Outlet structures, risers, trash racks, orifice plates, inlet pipes, erosion damage, and embankment issues can typically be repaired or replaced without full system reconstruction. Early identification of developing problems through regular inspection is the most cost-effective way to keep repair scopes manageable. Capital Stormwater Services assesses facility conditions, identifies repair needs and performs targeted repairs to restore function and compliance without unnecessary cost.

Yes. Capital Stormwater Services works with HOAs and property management companies throughout Northern Virginia to establish scheduled maintenance programs for community stormwater facilities. We conduct annual or semi-annual inspections, perform required maintenance and provide documented reports that satisfy local maintenance agreement obligations and give HOA boards and property managers the records they need for community compliance and liability protection.

A stormwater facility that is not maintained to design capacity can contribute to downstream flooding, erosion and property damage. Property owners who fail to maintain their stormwater facilities in accordance with recorded maintenance agreements may face civil liability exposure in addition to regulatory consequences. Documented, scheduled maintenance is one of the most straightforward ways to demonstrate responsible facility stewardship.

Contact us as soon as possible. County stormwater inspection notices typically require a response and corrective action within a defined timeframe. Capital Stormwater Services can conduct an immediate facility assessment, identify what maintenance or repairs are needed, perform the work and provide the documentation you need to respond to the county and demonstrate that your facility has been brought back into compliance.

Common indicators of reduced bioretention performance include standing water that does not drain within 24 to 48 hours after a storm event, visible sediment accumulation on the media surface, bare or dying vegetation, erosion at the inlet, blocked or damaged overflow structures and visible bypassing of runoff around the facility. If you observe any of these conditions, a maintenance inspection is warranted. Capital Stormwater Services can assess your facility and recommend the appropriate corrective measures.