Layer Estimates:

Layer: Drainage Network Nodes (ID:0)
Count: 18571
Extent:

XMin: 519724.3525
YMin: 5246043.0245
XMax: 529533.1552
YMax: 5256252.5807
Spatial Reference: 28355 (28355)

Layer: Drainage Network Pipes (ID:4)
Count: 17055
Extent:

XMin: 518031.3517
YMin: 5246042.8815
XMax: 529533.1552
YMax: 5256252.5807
Spatial Reference: 28355 (28355)

Layer: Drainage Branch Connections (ID:1)
Count: 7660
Extent:

XMin: 520556.9812
YMin: 5245941.2748
XMax: 529523.8096
YMax: 5256153.4485
Spatial Reference: 28355 (28355)