Flood Zones in Alexandria, Virginia: Old Town's Waterfront Risk

'Sunny day' tidal flooding is real, frequent, and increasing

Old Town Alexandria's Waterfront Park and Point Lumley Park area floods frequently from ordinary tidal action alone -- not just during storms. As of October 2025, the waterfront had recorded 227 flooding events at the Prince Street gauge level over the preceding year, compared with a 20-year average of 145 events -- a substantial, documented increase, not a one-off bad year. This is the kind of "sunny day" flooding that comes purely from high tide pushing water up through the storm-sewer system, meaning it isn't limited to hurricane season or heavy-rain events, and it's a genuinely distinctive risk factor for waterfront-adjacent Alexandria property that a generic flood-zone map lookup alone won't fully capture.

The city's flood-mitigation project: a real, eventful, still-unfolding history

Alexandria's response has been a large, actively managed capital project, not a stalled plan on paper. In 2024, the city was awarded a grant from the Virginia Department of Conservation and Recreation's Community Flood Preparedness Fund to develop a comprehensive citywide Flood Resilience Plan. Separately, the city's longer-running Waterfront Implementation Project hit a genuine setback: after a planned pump station was blocked (reporting describes the National Park Service effectively sinking the original pump-station plan), the city moved to a redesigned flood-mitigation approach, unveiled around March 2026.

That redesigned approach is described as eliminating 100% of routine sunny-day flooding and providing river flood protection up to elevation 6 feet -- matching the performance the original pump-station concept promised for those specific scenarios -- but it will not fully address tidal influence on the storm-sewer system under higher river conditions, and will not protect against a projected 1-to-2-foot future sea-level rise without an eventual pump station being added later. The current project timeline calls for a grading plan and 70% design in fall 2026, a Guaranteed Maximum Price construction proposal in fall/winter 2026, final design running winter 2026 through spring 2027, and construction beginning summer or fall 2027 -- with Alexandria's plan to fight flooding closing Waterfront Park and Point Lumley Park for at least two years once construction starts.

What this means before you buy near the waterfront

If you're evaluating any Alexandria property near Old Town's waterfront, treat flood exposure as a live, currently-changing risk factor rather than a fixed historical fact -- both because the flooding trend itself is worsening (227 vs. a 145-event average) and because the mitigation project's protection level, timeline, and construction-period park closures are all still in motion as of this writing. Check the current FEMA flood-zone designation for the specific parcel, ask the city's Flood Action program directly about the current status and expected completion of the Waterfront Implementation Project, and factor in that the redesigned mitigation plan explicitly does not fully solve tidal storm-sewer backup under higher river conditions or protect against future sea-level rise without further work.