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"geometry": { "type": "Point", "coordinates": [ 37.899444444444, -86.705555555556 ] }, "properties": { "image": "https://water.noaa.gov/resources/photos/cnni3/12709649157270540782.jpeg", "caption": "Upper Gate From Chamber" } } ] }, "dataAttribution": [ { "abbrev": "US Army Corps of Engineers", "text": "USACE - US Army Corps of Engineers", "title": "US Army Corps of Engineers", "url": "https://www.lrl.usace.army.mil/" }, { "abbrev": "USGS", "text": "03303280", "title": "Observations courtesy of U.S. Geological Survey", "url": "https://waterdata.usgs.gov/nwis/inventory/?site_no=03303280" } ], "impactsLowWaters": [], "normalThreshold": { "value": 10, "units": "ft" }, "hydronotes": [ { "statement": "The future pool levels are furnished by the U.S. Army Corps of Engineers.", "effective": "0101", "expiration": "1231" } ], "datums": { "vertical": { "value": [ { "label": "North American Vertical Datum of 1988", "abbrev": "NAVD88", "description": "A fixed reference for elevations determined by 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