Layer Estimates:

Layer: Minor Tributaries (ID:0)
Count: 20
Extent:

XMin: -10258057.8664
YMin: 3579631.0644
XMax: -9714075.8167
YMax: 4853071.9556
Spatial Reference: 102100 (3857)

Layer: Mississippi River (ID:1)
Count: 1
Extent:

XMin: -10293515.0709
YMin: 3304811.6979
XMax: -9850123.0129
YMax: 4853222.0573
Spatial Reference: 102100 (3857)

Layer: Ohio River & Tributaries (ID:2)
Count: 188
Extent:

XMin: -9848123.14
YMin: 4081932.0389
XMax: -8408646.2387
YMax: 5357510.3915
Spatial Reference: 102100 (3857)

Layer: Illinois River & Tributaries (ID:3)
Count: 10
Extent:

XMin: -9904223.8501
YMin: 4853171.135
XMax: -9263301.9824
YMax: 5363464.7452
Spatial Reference: 102100 (3857)

Layer: Upper Mississippi River & Tributaries (ID:4)
Count: 42
Extent:

XMin: -10955313.4627
YMin: 4853085.9811
XMax: -9787047.1542
YMax: 6017986.3015
Spatial Reference: 102100 (3857)

Layer: Missouri River & Tributaries (ID:5)
Count: 35
Extent:

XMin: -11282107.1847
YMin: 4602605.5275
XMax: -9905832.9897
YMax: 5607468.6353
Spatial Reference: 102100 (3857)

Layer: Arkansas River & Tributaries (ID:6)
Count: 9
Extent:

XMin: -10862620.8948
YMin: 3919615.095
XMax: -10151959.9069
YMax: 4620972.3856
Spatial Reference: 102100 (3857)

Layer: Red River & Tributaries (ID:7)
Count: 13
Extent:

XMin: -11160823.9446
YMin: 3493773.9291
XMax: -10247839.0946
YMax: 4400201.831
Spatial Reference: 102100 (3857)