Soil and Water Conservation Districts – Dam Breach Inundation Study Updates (DBIZ: Past, Present, & Future)

The Department of Conservation and Recreation – Division of Soil and Water Conservation in 2019 started to review and update existing Dam Breach Inundation Studies.  Key elements updated include 2015 Virginia Probable Maximum Precipitation Values, 2018 Virginia Probable Maximum Precipitation Temporal Distribution, 2021 USDA-Natural Resources Conservation Service Hydrologic Soils Ratings, Lidar topography, Hec-RAS 2D modeling, and downstream lateral inflow standardization.   This presentation will discuss the results and trends from seven (7) Dam Breach Inundation Studies, nine (9) Spillway Capacity Studies, six (6) Incremental Damage Analysis, and two (2) Acer-11 Studies.