Layer Estimates:

Layer: CENSUS2010HYDRO_ARC (ID:0)
Count: 59639
Extent:

XMin: -8184594.6527328
YMin: 5047071.05976759
XMax: -7781491.48873893
YMax: 5294894.05126283
Spatial Reference: 102100 (3857)

Layer: CENSUS2010HYDRO_POLY (ID:1)
Count: 3971
Extent:

XMin: -8180896.47243175
YMin: 5047018.93158807
XMax: -7782440.43684287
YMax: 5292929.77184935
Spatial Reference: 102100 (3857)