Delaware River Report: September 5, 2025

The release from Cannonsville is 450 cfs. The release was likely dropped in anticipation of the rain adding enough runoff to meet the flow target in Montague, NJ. Most of that rain seemed to miss us. None of the gauges are showing a significant bump and most flows have peaked and are falling. Keep an eye on the Stilesville gauge in case they increase the release today to hit the flow target in Montague. The lower water should make nymphing and blind casting dries more effective. And concentrate the bugs in the afternoon / evening. Olives, Isonychias, Cahills, and hebes are out. have some flying ants with you just in case.

Today will be 79 degrees and cloudy. It will clear to partly cloudy in the afternoon. . Wind will be 10 – 15 mph from the South.

What’s Hatching:
Slate Drake – #12-2xl – 12 – Isonychia bicolor
Light Cahill – #14 – Epeorus vitreus (male), Ephemeralla rotunda, Ephemerella invaria
Pale Evening Dun – #14 – Epeorus vitreus (female)
Dark Blue Wing Olive – #16 – 18 – Baetis spp.
Tan Caddis – #16 – 18 – Hydropsyche spp.
Tiny Blue Wing Olive – #22 – 26 – Pseudocloeon sp.


Click on the gauge links below for the latest flow information.

View the current local weather conditions.

Click on any gauge for the most recent data:
West Branch at Stilesville, NY430 cfs51°
West Branch at Hale Eddy, NY499 cfs52°
East Branch at Harvard, NY177 cfs57°
East Branch at Fishs Eddy, NY265 cfsN/A
East Branch at Hancock, NY67°
Mainstem at Lordville, NY865 cfs63°
Beaverkill at Cooks Falls, NY108 cfs64°
West Branch at 191 Bridge58°
West Branch at Walton (Cannonsville inflow)66 cfs65°
Cannonsville Reservoir Release450 cfs
Cannonsville Reservoir Capacity69.9%
Pepacton Reservoir Capacity80.7%
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