Layer Estimates:

Layer: Transmission_Lines (ID:0)
Count: 83207
Extent:

XMin: -17786554.3425
YMin: 1510914.0371
XMax: 16121678.2183
YMax: 9612906.1596
Spatial Reference: 102100 (3857)

Layer: US Power Plants (all) (ID:1)
Count: 9546
Extent:

XMin: -19114941.2723688
YMin: 2031359.37580146
XMax: -7266887.37837491
YMax: 11502860.5874309
Spatial Reference: 102100 (3857)

Layer: US Power Plants (Fossil Fuel) (ID:2)
Count: 2925
Extent:

XMin: -19114941.2723688
YMin: 2031359.37580146
XMax: -7266887.37837491
YMax: 11502860.5874309
Spatial Reference: 102100 (3857)