WSP Water Solutions

Flood Risk and Inundation Mapping 

Resilience Analysis Framework for Transportation — Hydraulics and Resiliency Support North Carolina | North

Missouri Digital Flood Insurance Rate Map (DFIRM) Services and Hazard Mitigation Support Missouri | State of Missouri Emergency Management Agency ■ Statewide transition to 2-D flood modeling ■ DFIRM development ■ Community engagement and education WSP is leading Missouri’s statewide transition to advanced 2-D flood modeling, supporting SEMA in enhancing flood risk analysis and community resilience. As one of the first states to adopt full 2-D modeling, Missouri now benefits from over 39,000 square miles of coverage, with full implementation targeted by 2027. WSP has delivered Enhanced Base Level Engineering studies across 74 counties, including 2-D regulatory grade models and best available data products. Technical achievements include over 36,000 miles of enhanced flood studies, 10,500 AE sinkhole analyses, and integrated 2-D Hydraulic Engineering Center River Analysis System (HEC-RAS) models for 3,104 square miles in the low slope Bootheel region. WSP’s outreach spans all 113 counties, with workshops and meetings to train local leaders in using DFIRM datasets, risk products and mitigation planning tools. The team also supports assessments using HAZUS-MH and integrating local plans from all 114 counties. Outcomes include levee certifications, improved floodplain mapping and over 457 identified mitigation actions. WSP’s work provides flood risk data for over 85% of the state’s population and drives resilient infrastructure planning statewide. Missouri’s Enhanced Hazard Mitigation Plan, updating risk

Colorado Flood Risk and Inundation Mapping Colorado | Colorado Water Conservation Board

Carolina Department of Transportation (NCDOT) ■ Emergency response innovation and support ■ Development of advanced flood simulation tools ■ Policy and design transformation In response to Hurricane Florence’s devastating impact on North Carolina’s transportation infrastructure, WSP partnered with NCDOT to develop the Resilience Analysis Framework for Transportation (RAFT)—a groundbreaking platform designed to transform how the state anticipates and responds to flood risks. During the catastrophic hurricane, NCDOT lacked the tools to assess real-time roadway flooding, revealing a critical and dangerous gap in preparedness. Our team quickly stepped in, and 2 years, we engineered a secure system that centralizes disparate datasets and resilience tools. RAFT has two core applications: the Roadway Inundation Tool (RIT) and the Coastal Roadway Inundation Simulator (CRIS). These applications simulate flood impacts across all 100 North Carolina counties using high-resolution LiDAR and hydraulic data. These tools allow planners and emergency managers to visualize, quantify and export flood scenarios for proactive mitigation. The platform has driven over $750,000 in revenue, reshaped NCDOT’s hydraulic design standards and enabled statewide future-ready planning.

■ Hydraulic and hydrologic modeling ■ FEMA-compliant map production ■ Community engagement

WSP has been a partner to the Colorado Water Conservation Board for over a decade, supporting its Floodplain Mapping Program through the Federal Emergency Management Agency (FEMA) Cooperating Technical Partners initiative. Our team has delivered more than 110,000 square miles of 2-D flood studies, 55,000+ Digital Flood Insurance Rate Map panels and over 13,000 detailed studies across Colorado. We’ve led regional hydrology updates for the Colorado, Rio Grande, Yampa and Arkansas River basins using Bulletin 17C, and developed regression equations for snowmelt driven systems. Our work includes complex modeling for alluvial fans, post-wildfire zones, debris flows and levee systems in communities like Grand Junction, Crestone, Glenwood Springs and Pueblo. WSP’s innovative tools, such as the FloodVue AR mobile app, enhance public engagement by visualizing flood scenarios in immersive formats. Our integrated approach combines 1-D and 2-D Hydraulic Engineering Center River Analysis System modeling, LiDAR acquisition, and stakeholder collaboration to deliver technically sound, FEMA-compliant flood risk products that empower communities to plan, mitigate and build resilience.

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