sorry. don't have the map number handy. [added to subject .JHM.] saw road closure sign last saturday so i looked it up and found this from hunterdon county web site:
"COUNTY CULVERTS H-50, H-51 and H-53 at County Road 627-Riegelsville-Milford Road located in the Township of Holland will be closed at the intersection of Spring Garden Road and 3/10 of a mile from Bridge Street (Milford Borough). County Road 627-Riegelsville-Milford Road will be Closed to All Traffic starting on June 4, 2012 for approximately 4-5 weeks.
The county bridge crew will be repairing Culverts H-50, H-51 and H-53 with pre-cast panels.
A detour will be posted."
being familiar with the area, i would follow the posted detour and resist any temptation to cross into PA and take sr 32, which is narrow, twisty in places and generally has no shoulder. the nj side is much nicer riding. this closed stretch is neat, but there are other neat parts.