Virginia HB1356 updates precipitation design standards to account for climate change.
Virginia HB1356 mandates the State Water Control Board to establish precipitation design standards incorporating climate-adjusted rainfall. These standards must reflect the most recent NOAA precipitation frequency estimates, considering increased precipitation intensity, frequency, and duration. The Board must review these standards annually to ensure they protect public safety and infrastructure. The Department of Transportation must update its manuals and standards accordingly. Localities may adopt more stringent standards if needed.
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