Layer Estimates:

Layer: Rivers (ID:0)
Count: 527
Extent:

XMin: -9666552.20712663
YMin: 4002407.01138982
XMax: -9313869.61544717
YMax: 4326338.81919942
Spatial Reference: 102100 (3857)

Layer: WaterBodies (ID:1)
Count: 973
Extent:

XMin: -9661619.1888717
YMin: 4003114.80286686
XMax: -9338391.32256283
YMax: 4316225.55535564
Spatial Reference: 102100 (3857)