Layer Estimates:

Layer: Stream Gages (ID:0)
Count: 2690
Extent:

XMin: -13914226.2236845
YMin: 3821540.13182791
XMax: -2384775.76310448
YMax: 5167798.32976572
Spatial Reference: 102100 (3857)

Layer: HUC12 Boundaries (ID:2)
Count: 4469
Extent:

XMin: -13859964.7684512
YMin: 3819109.23353158
XMax: -12634616.2670314
YMax: 5171245.69907197
Spatial Reference: 102100 (3857)