This page contains steady-state and unsteady-state one-dimensional (1D) Hydrologic Engineering Center – River Analysis System (HEC-RAS) models (version 5.0.7) for the Maumee River. The upstream end of the model domain (0.0 river kilometers) is located 280 meters downstream from Independence Dam near Defiance, Ohio, and the downstream end of the model domain is the mouth of the Maumee River at Lake Erie near the National Oceanic and Atmospheric Administration (NOAA) tidal gage 9063085 (95.6 river kilometers). The models projected coordinate system is in the North American Datum of 1983 State Plane Coordinate System for Ohio North (U.S. feet). The steady-state HEC-RAS model uses event-based peak streamflow values from the U.S. Geological Survey (USGS) streamgage 04192500 Maumee River near Defiance, Ohio, and a range of predetermined steady-state flow conditions for the upstream boundary conditions. The NOAA tidal gage 9063085 is used for the downstream boundary condition as the daily median tidal stage derived from a daily stage duration (September 19, 1995, to March 31, 2021). The model uses a drainage area approach to account for tributary inflows. The model was calibrated to two high-water events using the USGS streamgage 04193500 and three temporary USGS stage gages: USGS 411731084164800 Maumee River near Independence, Ohio, USGS 412449083513600 Maumee River below Bridge St at Grand Rapids, Ohio, and USGS 412837083445500 Maumee River at Missionary Island near Waterville, Ohio. The calibrated HEC-RAS model was used to simulate 10 steady-state flow conditions of: 500 cubic feet per second (cfs), 1,000 cfs, 5,000 cfs, 10,000 cfs, 15,000 cfs, 20,000 cfs, 25,000 cfs, 35,000 cfs, 65,000 cfs, and 100,000 cfs in reference to the USGS streamgage 04192500 Maumee River near Defiance, Ohio. These steady-state HEC-RAS simulations provided hydraulic inputs for FluEgg simulations. The unsteady-state HEC-RAS model uses the USGS streamgage 04192500 Maumee River near Defiance, Ohio, for the upstream boundary conditions and the USGS streamgage 04193500 Maumee River at Waterville, Ohio, for tributary inflows. The NOAA tidal gage 9063085 is used for the downstream boundary conditions. The model was calibrated to three high-water events using the USGS streamgage 04193500 and three temporary USGS stage gages: USGS 411731084164800 Maumee River near Independence, Ohio, USGS 412449083513600 Maumee River below Bridge St at Grand Rapids, Ohio, and USGS 412837083445500 Maumee River at Missionary Island near Waterville, Ohio. The calibrated HEC-RAS model was used to simulate hydraulic data for FluEgg event simulations. This page includes: --HEC-RAS_steady_state_model.zip: zipped folder containing HEC-RAS model and calibration files for the steady-state model --HEC-RAS_unsteady_state_model.zip: zipped folder containing HEC-RAS model and calibration/validation files for the unsteady-state model --MaumeeRiver_centerline.kml: KML file of the Maumee River centerline that represents the model domain