Enhancement and Retrofit Projects
Stormwater BMP Retrofits in Virginia
Upgrading stormwater BMP facilities through enhancements and retrofits can improve performance, extend lifespan, and help meet evolving regulations.
We assess existing BMPs and recommend cost-effective retrofits, such as adding infiltration zones, replacing outdated structures, and improving pollutant removal capabilities.
Why it Matters
& What to Expect
Stormwater regulations are continually evolving, with increasing focus on improving water quality and meeting Total Maximum Daily Load (TMDL) pollutant reduction targets. Older BMP facilities often fail to meet current performance standards or operate inefficiently due to outdated designs, structural degradation, or inadequate pollutant removal capabilities.
Our enhancement and retrofit services upgrade your facilities to modern standards, ensuring compliance while extending functionality and maximizing return on investment. We begin with a comprehensive assessment of your existing BMPs, evaluating structural conditions, treatment performance, hydraulic function, and compliance status.
Based on our findings, we develop retrofit recommendations tailored to your facility type, site conditions, and regulatory requirements. Potential retrofit solutions include:
Our retrofits are designed not only for regulatory compliance, but also to provide long-term operational benefits such as reduced maintenance costs, improved site drainage, and increased property value. We provide detailed design plans, permitting support, and construction management to implement enhancements efficiently and correctly.
For owners subject to TMDL pollutant reduction requirements, retrofitting BMPs is often the most cost-effective strategy to achieve mandated nutrient and sediment reductions. We calculate pollutant load reductions associated with each retrofit option, providing documentation to support MS4 annual reporting and TMDL compliance.
All enhancement and retrofit projects include comprehensive documentation of design changes, construction activities, and as-built conditions to satisfy agency requirements and streamline future maintenance.
Ultimately, our goal is to transform underperforming BMPs into high-functioning assets that protect water quality, reduce regulatory risk, and support your operational and environmental goals.
Frequently Asked Questions
About SWPPP Inspections
When it fails to meet water quality standards, experiences performance decline, or faces regulatory updates.
Improvements include advanced filtration, green infrastructure integration, and expanded detention capacity.
In some cases, retrofits are necessary to meet new permit conditions and TMDL requirements.
