Grassy Cove

MAPS
Select one of the following maps to display this waypoint (WGS84).

• Google map road/image/topo/terrain with distance/elevation tools
• CalTopo shaded relief topo with draw-track/profile or Gmap4 hires topo
• topoquest (quad name) or USGS topo quads
• leafletjs map (non google), with markers
• Java USGS topo map or aerial image with nearby landforms, distance tool (deprecated)
• Road maps: MapQuest or OSM or Google or bing or driving directions
• more maps weather, USGS elevation

GPS

• download just this waypoint or nearby waypoints (gpx)
• send waypoint to your Garmin GPS
• download Cumberland county waypoints for landforms or download other landforms waypoint files (.gpx or .mxf)

Remarks:

A National Natural Landmark, one of the larger sinkholes in the US -- 5 square miles. See wikipedia or more info

View from the Cumberland Trail.

From the digital analysis of TN sinkholes 2013 10m DEM
   weighted centroid: 35.83742333930,-84.9277519418
   Area: 13.6 km²
   Perimeter: 38.9 km, boundary
   Depth: 42.7 m
   Volume: 37736946 m³
   Low: 1533.3' at 35.856018,-84.927129
   High: 1664.7' at 35.82663,-84.90166 spill point
An interior path is nearly 5 miles long.

The waters in Grassy Cove exit through Mill Cave and resurge at Head of Sequatchie Spring in Devilstep Hollow (35.792854,-85.007616) at an elevation of 1075'. Near Cave Spring (35.795917,-85.008431) is a 50' sinkhole.

In 2017, Chuck Sutherland re-analyzed Grassy Cave with TN LiDAR elevation data:

Watershed Area 33.1770 Kilometers2
Watershed Perimeter 42.1524 Kilometers
Sinkhole Area 13.3112 Kilometers2
Sinkhole Perimeter 35.719226 Kilometers
Sinkhole Volume 999,360,713 Meters3
Sinkhole Major Axis 7.673683 Kilometers
Sinkhole Minor Axis 4.362937 Kilometers
Sinkhole Declination 30.8 Degrees
Sinkhole Minimum Elevation 467.27 MASL
Sinkhole Maximum Elevation 507.24 MASL
Sinkhole Depth 39.97 Meters

   © Tom Dunigan