MONONGAHELA RIVER: Latitude = 40.442222, Longitude = -80.013610, Zoom=14

River Mile Point(s)
Distance
Statute Miles Nautical Miles  Kilometers

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Navigation mile 0.0 of the Monongahela River is at mile 0.0 of the Ohio River, in Pittsburgh, PA. The navigable portion of the Monongahela includes its whole length of 128.73 miles. The river begins at the confluence of the West Fork and the Tygart Valley River in Marion County, West Virginia.