Sorry, but don't know the exact map number, but there is apparently a bridge on the D&R Feeder Canal path at the north end of Lambertville, NJ that was taken out by the flooding caused by Ida. The detour is simple.
Heading south, just after the U.S. 202 overpass you usually make a left then quick rights to stay on the trail. Cannot make that right anymore. (There was a trail closure sign when I was there late last month, and a local told me about the missing bridge.) Instead of making the right, continue straight through the parking lot to NJ 29. Make a right onto NJ 29, the first right onto Cherry St then a left at the T onto N. Union St. The first traffic light you will come to is Bridge St. Make a right and that will take you to the bridge to New Hope, PA. Cherry and N. Union are generally quiet, safe riding.
Also, to the extent you are considering deviating from the route at Phillipsburg, NJ, by crossing into Easton, PA, and taking the D&L Trail south, don't. At least not any time soon. Stay on the nice roads on the NJ side of the river. Flooding from Ida caused extensive damage in places. In one or two places some two feet of trail surface was washed away, leaving exposed rocks. Had to walk the bike in numerous places, and the footing was bad. There were also a couple of downed trees. Don't know if they have been removed yet. Then, maybe a mile north of Upper Black Eddy, PA, a vary large section of the trail is gone. I confronted a chasm some 50'+ long and probably 15'+ deep. It does not look like it is something that can/will be repaired any time soon. The only workaround for this spot is to backtrack a bit, go out to PA 32 and riding that to the bridge to Upper Black Eddy and the bridge to Milford, NJ. PA 32 is a road you want to avoid, especially on weekends.
You can still access Dogwood Haven Campground from the D&L between Canal Ln. and Lodi Hill Road, but south of that point there was another trail closure sign and some heavy machinery blocking the trail.
