According to the NOAA River Forecast website, the Delaware River is expected to crest at the Riegelsville Bridge river gauge at 14 feet Monday morning, a foot below the Action Level. Below are the river levels (note that the level is relative to sea level, so doesn’t match the other levels) and expected impacts and a chart showing historic crests:
These images were taken from the National Oceanic and Atmospheric Administration, which maintains and monitors river gauges along the length of the Delaware River. For more much information, here is a link to the NOAA Riegelsville River Gauge, which is updated regularly:
https://water.noaa.gov/gauges/RGLN4
The main NOAA River Forecast site is available here: