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Welcome to the Office of the Delaware River Master (ODRM)

The Office of the Delaware River Master was established to ensure compliance with the provisions of the 1954 Supreme Court Decree (, subject to modifications stemming from more recent Flexible Flow Management Programs, and compilation of data concerning related streamflow, reservoir releases, and water diversions.

Agreement for Temporarily Increased Reservoir Releases
For April 30th-May 1st, 2016

As a result of a request for flow support from the Upper Delaware fishing community the Decree Party Principals unanimously agreed to temporarily modify releases from Cannonsville and Pepacton reservoirs to maintain higher flows for the “One Bug” fishing festival the last several days in April.

The temporary agreement will prevent short term fluctuations and reductions in releases that would otherwise have occurred as a result of both current weather conditions and the current reservoir levels and time of year as described in the current Flexible Flow Management Program. The terms of the agreement are posted at One Bug Event.

This decision was made in the context of the current hydrologic conditions, the approach of the end of the FFMP water year, and the availability of Interim Excess Release Quantity (IERQ) water.

Future decisions to release IERQ water will continue to be made on a case by case basis and will depend upon the hydrologic conditions at the time and in the context of ensuring a safe and reliable water supply for New York City and the Delaware River Basin water users.

The decree parties will continue to meet and identify opportunities to improve overall operations and address issues as they arise.

Provisional Hydrologic Data:

Data presented on the Office of the Delaware River Master website are reviewed periodically to ensure accuracy. The data are considered provisional, however, until they are published in the annual report of the River Master.

Data users are advised to carefully consider the provisional nature of the information before using it for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences.

Information on the accuracy and appropriate uses of the data can be obtained by contacting the Deputy Delaware River Master.

Flexible Flow Management Program (FFMP) and Background Documents

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