Maurice River

Maurice River
The Maurice River in Millville in 2006
Country	United States
State	New Jersey
Counties	Salem and Cumberland
Tributaries
- left	Burnt Mill Branch, Blackwater Branch, Little Robin Branch, Parvin Branch, Manantico Creek, Manumuskin River, Muskee Creek, Little Mill Creek
- right	Green Branch, Muddy Run, Mill Creek, White Marsh Run, Buckshutem Creek, Steep Run, Peterson Run, Sheppards Branch
Cities	Vineland, Millville
Coordinates	39°12′49″N 75°2′39″W / 39.21361°N 75.04417°W / 39.21361; -75.04417Coordinates: 39°12′49″N 75°2′39″W / 39.21361°N 75.04417°W / 39.21361; -75.04417
Source
- location	Pittsgrove Township
Source confluence	Still Run and Scotland Run
- coordinates	39°33′00″N 75°04′16″W / 39.5501153°N 75.0710102°W / 39.5501153; -75.0710102
Mouth	Delaware Bay
Length	50 mi (80 km) approx.
Basin	386 sq mi (1,000 km2) approx.
Discharge	for Norma (Pittsgrove Township)
- average	117 cu ft/s (3 m3/s)
- max	922 cu ft/s (26 m3/s) 1940
- min	24 cu ft/s (1 m3/s) 1966
Location of the mouth in Cumberland County, New Jersey

The Maurice River is a tributary of Delaware Bay in Salem County and Cumberland County, New Jersey in the United States. The river was named for Maurice, Prince of Orange.

The Maurice River, pronounced "Morris," is approximately 50 mi (80 km) long with a drainage area of 386 sq mi (1,000 km²). It is the second longest and second largest tributary to Delaware Bay. Its watershed includes an extensive southern portion of the coastal forested wetlands known as the Pine Barrens. Its mouth on Delaware Bay is surrounded by extensive salt marshes and has provided an historically important oystering ground.

It is born at the confluence of Still Run and Scotland Run, beneath the waters of Willow Grove Lake in Pittsgrove, Salem County and flows generally south-southeast, passing 2 miles (3 km) west of Vineland. At Millville it is impounded to form the Union Lake reservoir, approximately 3 miles (5 km) long. South of Millville it becomes navigable, forming a 10-mile (16 km) estuary that empties into Maurice River Cove on Delaware Bay. The estuary is joined from the northeast by Menantico Creek, the Manumuskin River, and Muskee Creek.

The river is considered especially pristine for the region, forming a critical ecological link between the Pine Barrens and the Delaware Bay systems, except that the State Of New Jersey advises against eating more than 8 ounces of fish caught in the river in any week or month, depending on the species, for the general population and advises against eating any fish from the Maurice River for the High Risk population. It is the location of one of the only stands of wild rice in New Jersey, and provides habitat for 53 percent of the species in New Jersey designated as endangered. In 1993, Congress designated 28.9 miles (46.5 km) of the river and its tributaries as the Maurice National Scenic and Recreational River, as part of the National Wild and Scenic Rivers program.