High Water Mark’s Dynamic
Floodplain Management

Floodplains are more than shaded zones on a map — they’re dynamic systems that influence public safety, property rights and development feasibility. Floodplains serve as natural sponges for excess water during heavy rain events, helping to reduce the risk of flooding and protect communities and infrastructure.

Floodplains also support a diverse range of plant and animal species and provide critical habitat for many species. They play an important role in filtering and purifying water, improving water quality for both human and ecological use.

High Water Mark helps clients understand, manage and communicate flood risks through a combination of technical precision and regulatory fluency.

Our Floodplain Services

By preserving and protect our floodplains, we ensure the long-term health and sustainability of our neighborhoods and the environment around us. Our floodplain services include:

  • FEMA Permitting
  • CLOMR/LOMR Applications
  • Base flood elevation (BFE) modeling and verification
  • Floodway encroachment analysis
  • Regulatory compliance and permitting
  • Expert analysis for flood-related litigation
  • Flood Hazard and Mitigation
  • Floodplain mapping
  •  408 Permitting
  • Floodplain Mapping
  • Risk and Uncertainty Analysis

Navigating Risk, Compliance and Resilience

Led by Chad Ballard, PE, CFM, our team brings not only modeling expertise (HEC-RAS, HEC-HMS, GIS) but also real-world experience navigating FEMA processes and local floodplain ordinances. Whether you’re developing near a waterway, contesting a flood zone designation or managing municipal flood resilience, we help bridge the gap between hydrology and regulation.

In courtrooms, council meetings and community hearings, we serve as the technical voice that explains floodplain impacts clearly and credibly. We translate contour lines into consequences — and mitigation into meaningful strategy.

Floodplain management isn’t just a regulatory checkbox for High Water Mark. It’s a critical component of smart, sustainable and defensible water planning.