Layer Estimates:

Layer: HYDRO100K_ARC (ID:0)
Count: 15305
Extent:

XMin: -8184388.01818423
YMin: 5046986.36483557
XMax: -7783952.42249013
YMax: 5294918.97266974
Spatial Reference: 102100 (3857)

Layer: HYDRO100K_POLY (ID:1)
Count: 3268
Extent:

XMin: -8180907.23395951
YMin: 5047063.41058223
XMax: -7783988.55249597
YMax: 5292955.54956691
Spatial Reference: 102100 (3857)