This interactive graph displays historical annual peak water levels and annual timeseries. To assist local residents, managers, and emergency teams in contextualizing long-term environmental patterns, data is mapped directly against colored operational and flood risk categories. Use the dropdown selector menu to toggle between the multi-decade "Annual Peak Water Levels" since 2005 and specific "Yearly Water Levels" to analyze historical annual or current year-to-date data. Hovering your mouse or sliding your finger across the timeline automatically tracks and reveals exact water elevation data for any specific date or year.
View Flood Risk Category Definitions