Layer Estimates:

Layer: Ponds, Lakes, Fountains, and Pools (ID:0)
Count: 119
Extent:

XMin: -78.763896457
YMin: 38.536206894
XMax: -76.9376287809999
YMax: 39.6908028990001
Spatial Reference: 104145 (104145)

Layer: Rivers and Streams (polygons) (ID:1)
Count: 148
Extent:

XMin: -78.8269758879999
YMin: 38.61876972
XMax: -76.938148623
YMax: 39.6998132140001
Spatial Reference: 104145 (104145)

Layer: Hydrography Centerlines (ID:2)
Count: 2598
Extent:

XMin: -78.774408938
YMin: 38.5105477190001
XMax: -76.754234133
YMax: 39.69816697
Spatial Reference: 104145 (104145)