expanding search for upstream NWM reach?

[sclaw]

In the example below, there is a source model with two NWM reaches at its d/s end but no reaches at its u/s end. Since the d/s reaches are more than 1,000 ft from the u/s end of the source model reach, conflation fails for the whole model. Should we consider iterating our way down the RAS cross-sections when no reach can be found close to the u/s end?

Collection: ble_11120303_LowerNorthForkRed
Model: Stink_07
Sub model: 563137