Highlight Hydrants (the feature dataset, not the feature class Fire Hydrants). Select File > New > Topology. Read the New Topology window. Next. Accept the default name Hydrants_Topology. Enter a cluster tolerance of 5.0 Feet. See Figure 4-23
. Click Next.
____ 5. Put checks in the boxes of Fire_Hydrants and Water_Lines, so they will participate in the topology. Click Next.