The Broadkill River watershed is located in the east central portion of Sussex County. It is bounded on the north by the Cedar Creek watershed, on the west by the Gravelly Branch and Deep Creek watersheds, on the south by the Lewes-Rehoboth Canal, Rehoboth Bay, and Indian River watersheds, and on the east by the Delaware Bay. The mainstem of the Broadkill River is approximately 25 miles long. The major watercourse in this segment is the Broadkill River which originates at the Town of Milton and discharges into the Roosevelt Inlet near Lewes. Major impoundments in the area are Waggamons Pond and Diamond Pond located near Milton. The Broadkill River flows generally eastward until it approaches the coast where it turns abruptly and flows south to discharge into the Roosevelt Inlet. The flow of this stream is sluggish and the water is turbid. The watershed drains an area of 107 square miles.
There is only one small incorporated community, the Town of Milton, within the watershed. The primary land uses in the area are agriculture and wildlife refuge.
The tidal marshes along the coast are part of a Prime Hook National Wildlife Refuge. Prime Hook National Wildlife Refuge is located on the west shore of Delaware Bay, about 22 miles southeast of Dover, and 64 miles southeast of Wilmington, Delaware. The refuge has one of the best thriving wetland habitat areas along the Atlantic Coast. These habitats have become important rest points for spring and fall migrating shorebirds and wading birds. Endangered and threatened species management activities provide habitat for the Delmarva fox squirrel, nesting bald eagles, and migrating peregrine falcons. Neotropical land birds passing through utilize the refuge's upland forested habitat during the fall and spring. The refuge's 10,000 acres are a diverse landscape featuring freshwater and salt marshes, woodlands, grasslands, scrub-brush habitats, ponds, bottomland forested areas, a 7-mile long creek, and agricultural lands. These cover types provide habitat for approximately 296 species of birds, 38 species of reptiles and amphibians and 37 different mammals. Public use at Prime Hook provides compatible wildlife-oriented recreational opportunities. Since the signing of the National Wildlife Refuge System Improvement Act of 1997, appropriate public uses of the Refuge System include six major wildlife-dependent recreational uses and are: hunting, fishing, wildlife observation, photography, environmental education, and environmental interpretation.
Located in Sussex County, Delaware, the Broadkill watershed encompasses 68,500 acres within the Delaware Bay and Estuary Basin and is primarily comprised of agricultural land with urban development and a wildlife refuge. The Broadkill River headwaters originate near the Town of Milton and flow 25 miles eastward towards Broadkill Beach where it outlets to the Delaware Bay through the Roosevelt Inlet.
Twenty percent of the watershed is covered in wetlands, and received an overall grade of C+. Flat
wetlands, usually forested, form the headwaters of the Broadkill River in the western portion of the watershed. Riverine
wetlands follow tributaries and streams throughout the central portion of the watershed, and expansive tidal
wetlands run along the Broadkill River until it reaches the Delaware Bay. Pockets of depressions
, including rare Coastal Plain ponds, are scattered throughout the watershed.
(B-), and riverine
(B-) wetland types were assessed and graded (grade in parenthesis) in this watershed. The most common stressors to these wetlands were invasive plant species, forestry activity, excavation, filling, and ditching of the wetland, and development, agriculture, and roads in the lands surrounding the wetland (buffer). The complete reports and data for this assessment are available online
The designated uses for the Broadkill include primary recreation, secondary recreation, fish, aquatic life and wildlife, industrial water supply, and agricultural water supply in freshwater segments. There are four point sources within the watershed including Allen Family Foods, SAW Georgetown Plant, Perdue Georgetown Plant, and City of Milton Wastewater Treatment Plant. There are nutrient and bacteria TMDLs for the Broadkill River watershed that require point source nitrogen loads capped at 245.6 lbs/day, point source phosphorus loads capped at 28 lbs/day, bacteria point source loads capped at 1.67E+09 colony forming units (CFU) per day, nonpoint source nitrogen reductions of 40%, nonpoint phosphorus reductions of 40%, and nonpoint bacteria reductions of 75%.
The Broadkill River Watershed has a total of thirty-five sites listed in the Site Investigation and Restoration Section
database. There are seventeen that are state-fund lead (HSCA)
sites, eight Brownfield program
sites, six sites that are in the Voluntary Cleanup Program (VCP)
, three sites that have undergone a preliminary assessment / site inspection (PA/SI) and one site listed as a Formerly Used Defense Sites (FUDS).
Each of the sites is sampled through the programs listed above for a consistent suite of environmental contaminants. These contaminants are broadly classified as Volatile Organic Compounds (VOCs)
, Semi-Volatile Organic Compounds (SVOCs)
, Polychlorinated Biphenyls (PCBs)
and Metals as listed using USEPA and DNREC defined standards. When sites are adjacent to water bodies sediment samples are collected to assess potential impact from a site on the health of the waters.
In water bodies of the Broadkill River Watershed, samples have indicated that mercury is present in the environment at levels requiring further attention under the Clean Water Act (1972)
. The Broadkill River Watershed is on the 303d list of impaired waters as well as having State of Delaware Fish Consumption Advisories
If you would like to view reports for any of the sites in the SIRS program please follow the link the DNREC Environmental Navigator
to search by map for the Broadkill River Watershed.
The Broadkill River Canoe Trail links the Town of Milton to the Edward H. McCabe Preserve, just three miles to the east. Canoes are available to rent at Wilson's Sunshine Marina, and paddlers can put in at Memorial Park.
Significant areas of Atlantic white cedar are found in only 6 watersheds in the state, one of which is the Broadkill.