sentences:  The RVRR located its Watnong depot on the northern bank of the Whippany River on the east side of Lake Valley Road.On a rail profile map the "final" 7 miles from Mendham to Watnong (2 miles from Morristown) appears as a gently downhill ride into the county seat of Morris County, New Jersey.Built as the Rockaway Valley Morristown Extension Railroad, the first train arrived in Watnong in early August 1892.