Locating point X river miles from a junction

Discussion created by michellelt on Aug 23, 2011
I've started to get requests to find a point on the network X miles upstream/downstream from a given junction. An example is a map I'm trying to create showing 200 river miles upstream from the coast for 10 river basins. My networks were created using NHDFlowline with additional junctions added.  I'm not positive that M is enabled at this point. Is there an easy way to do this?  Will it show me the actual location or just select the segment which contains the endpoint?  BTW, I'm using Arc 9.3.2. & ArcHydro 9 & I haven't written a lot of code.

Thanks in advance,