US Army Corps of Engineers
Philadelphia District & Marine Design Center

Mispillion River

Published Dec. 3, 2012
Mispillion River Project Index Map

Mispillion River Project Index Map

The Mispillion River rises in Kent and Sussex Counties, Delaware. It flows northeasterly 13 miles along the boundary line between the two counties and empties into the Delaware Bay about 16 miles above Cape Henlopen, Del. The waterway supports the only launch service that provides safe transport of personnel and supplies to tanker vessels anchored in Delaware Bay and the nearby Atlantic Ocean.

The Mispillion River rises in Kent and Sussex Counties, Delaware. It flows northeasterly 13 miles along the boundary line between the two counties and empties into the Delaware Bay about 16 miles above Cape Henlopen, Del. The waterway supports the only launch service that provides safe transport of personnel and supplies to tanker vessels anchored in Delaware Bay and the nearby Atlantic Ocean.

CONGRESSIONAL DISTRICTS: DE-AL

APPROPRIATION / PHASE: Operation & Maintenance, General

BUSINESS PROGRAM: Navigation

LOCATION: The project is located north of Milford in Sussex County, DE.

DESCRIPTION:  Authorized under HD 56-102 in 1907 and modified as HD 74-83 in R & H Act HD 678, 62nd Congress, 2nd Session (1919) and modified by R & H Com Doc. 83, 74th Congress, 2nd Session (1937) and modified by SD 229, 81st Congress, 2nd Session (1954). 

The waterway rises in Kent and Sussex Counties, Delaware. It flows northeasterly 13 miles along the boundary line between the two counties and empties into the Delaware Bay about 16 miles above Cape Henlopen, Delaware. The waterway provides an entrance channel six feet deep and 60 feet wide from Delaware Bay to the landward side of the jetties. 

This waterway supports the only launch service that provides safe transport of personnel and supplies to tanker vessels anchored in Delaware Bay and the nearby Atlantic Ocean. The U.S. Coast Guard has expressed concern that further shoaling in the channel could delay the response of oil spill emergency clean-up and containment contractors during lower tide stages. 

This waterway supports the only launch service that provides safe transport of personnel and supplies to tanker vessels anchored in Delaware Bay and the nearby Atlantic Ocean. Reports of vessel groundings and associated damages have been reported during lower tide stages and prolonged blow-out tide periods. The U.S. Coast Guard has expressed concern that further shoaling in the channel could delay the response of oil spill emergency clean-up and containment contractors during lower tide stages. Failure to perform routine maintenance dredging will result in hazardous navigating conditions, damage to commercial, charter and recreational vessels, delays in service to the shipping industry utilizing the Delaware River, Philadelphia to Sea Channel, restricted and/or delayed Coast Guard national security vessel audits and economic hardships. Concerns: Jetty is considered failed relative to structural condition but still functional in terms of navigation channel and is being monitored.

Channel condition surveys will be performed in the spring of FY 2019. Movement of the channel markers to take advantage of deeper water is being investigated to minimize dredging requirements in FY19. Potential dredging and placement with the Government Dredge Currituck or Murden is also being investigated for the small amount of shoaling that exists in the channel. Sediment samples will be collected to determine if material is suitable for nearshore placement.

PROJECT GOALS: The purpose of this project provides for an entrance channel from the Delaware Bay to the landward side of the jetties

PROJECT MANAGER: Monica Chasten