Aaron Sprague, E.I.
Water Resources Engineer / GIS Specialist
Hydrologic and hydraulic modeling for dams, floodplains, and stream restoration — from small neighborhood ponding studies to watershed-wide FEMA Base Level Engineering.
What I Do
- Hydrologic modeling — HEC-HMS, HEC-RAS (1D & 2D, rain-on-grid)
- Hydraulic modeling — HEC-RAS, SITES, SWMM
- GIS analysis & mapping — QGIS, ArcGIS, Python/PyQGIS
- Dam rehabilitation & watershed planning (NRCS NWMP / PL-566)
- FEMA Base Level Engineering studies
- Physical hydraulic model construction & operation
- Stream stability & restoration design (APWA 5600)
- Automated asset characterization — LiDAR & AI workflows
Featured Projects
Four of 35 projects — see the full catalog on the Projects page.
Marysville Dam Water Table Restoration — Preliminary Engineering Study
Hydraulic assessment and concept design alternatives for the failed 160-year-old low-head dam on the Big Blue River, including engineered rock grade control for aquatic organism passage, a concrete ogee dam, and cofferdam, with opinions of cost.
Caston Mountain 1 & 2 Rehabilitation Design
Hydrologic and hydraulic analysis for two high-hazard NRCS embankment dam rehabilitations, including curve number and time-of-concentration derivation from GIS data and SITES model review to 90% design.
Indian Creek Flood Assessment — Planning Assistance to States
Planned, constructed, operated, and calibrated a physical hydraulic model of Indian Creek to evaluate complex flooding and sediment dynamics, including cost estimation, training of client staff, and platform and plumbing design.
Automated Asset Characterization Study
Hydrologic and hydraulic analysis for a research project developing an AI-based system to automate bridge, culvert, and low-water crossing inspection using LiDAR data.
Research
M.S. research in GIS-informed flood risk assessment, including an automated GIS workflow to identify, characterize, and analyze culvert assets and predict overtopping. Read more.