NATIONAL PARK SERVICE · news
NPS Conducting Dye Tracer Study to Determine Groundwater Pathways
May 22, 2022 · Source: National Park Service
The park is conducting a dye tracer study along US Route 209 near mile marker 17 beginning May 20 to determine the pathway water stakes underground. You may notice areas along the Delaware River near the study area where water has a temporary bright fluorescent yellow-green color. Although the dye used is highly visible, it is a commonly used, environmentally friendly, non-persistent, biodegradable, non-toxic dye that is often used in fish hatcheries. The color will disappear in a matter of hours to days as it dilutes and degrades.
Read the official NPS sourceWhat Travelers Need to Know
Use the official notice to confirm the affected destination, dates and visitor arrangements before finalizing your trip.
Dates and operating conditions can change after publication. Check the park’s official visitor information for your travel date.
Traveler guidance by State & Nation Staff Writer.