What matters for project planning
Sitting at the confluence of four waterways inside the Miami Conservancy District's flood-control system is the single most important fact for below-grade work here. That system exists because the valley floods, and the glacial outwash sand and gravel beneath it — the same deposits that make the region's aquifer productive — hold groundwater close to the surface. So hydrostatic pressure on a Dayton basement wall is a real and often seasonal load rather than a sales line. Where a collected system discharges matters too: the city inspects hundreds of stormwater outfalls a year and expects discharge to reach the system properly.
Official sources
Verify the property, not just the city
General city information won't tell you a parcel's actual flood zone, historic status, permit requirements, soil conditions, or hidden construction -- get that confirmed with Dayton's authority and the provider.
Reviewed mid-2026 -- these sources and maps are updated periodically, so verify current status.