Dam Breach Analysis

BEI provides dam breach inundation analyses and failure consequence assessments for impoundment classification, emergency action plans (EAP), and regulatory compliance. Analyses are conducted in accordance with TCEQ dam safety regulations and applicable FEMA and USACE guidance.

Scope of Services

  • Dam and embankment characterization: geometry, materials, and spillway capacity review
  • Breach parameter development: breach width, side slopes, formation time (Froehlich, USBR, regression methods)
  • HEC-RAS unsteady flow dam breach simulation (1D and 2D)
  • Peak outflow and flood wave routing downstream through channel and floodplain
  • Inundation mapping: peak depth, velocity, and arrival time grids
  • Hazard classification support per TCEQ Chapter 299 criteria
  • Emergency Action Plan (EAP) technical support and inundation zone mapping
  • Incremental hazard analyses comparing breach vs. no-breach scenarios

Typical Projects

Applicable Guidance

TCEQ Ch. 299 Texas dam safety program classification and breach study standards
FEMA P-946 Reverse routing and breach parameter guidance
HEC-RAS 2D Coupled 1D/2D inundation modeling platform
USACE & USBR Breach parameter regression equations

Frequently Asked Questions