Layer Estimates:

Layer: Major Rivers (ID:0)
Count: 8
Extent:

XMin: -10742705.3816244
YMin: 4167334.53538926
XMax: -8908531.96220396
YMax: 6023667.15793517
Spatial Reference: 102100 (3857)

Layer: USA States (ID:1)
Count: 15
Extent:

XMin: -10824604.1515712
YMin: 4161561.73000071
XMax: -7998990.56013829
YMax: 6340354.47813391
Spatial Reference: 102100 (3857)

Layer: Great Lakes Basin (ID:4)
Count: 1
Extent:

XMin: -10376520.0404
YMin: 4923463.077
XMax: -7819026
YMax: 6146676.5
Spatial Reference: 102100 (3857)

Layer: Study Area (ID:5)
Count: 2
Extent:

XMin: -12683535.8714
YMin: 3366661.0001
XMax: -8665039.0948
YMax: 6274836
Spatial Reference: 102100 (3857)

Layer: USA_Boundary (ID:6)
Count: 1
Extent:

XMin: -19942908.9998834
YMin: 2144525.99995926
XMax: -7452853.9999874
YMax: 11528156.0000081
Spatial Reference: 102100 (3857)