Delaware River Report: July 21, 2022

NYSDEC is again releasing a 12 hour 200cfs pulse from Cannonsville and a 6 hour 100cfs pulse from Pepacton due to the high temperatures. The pulse at Cannonsville will last until 11:00am today, the Pepacton pulse has already been completed. The Lordville gauge’s temperature reading has been malfunctioning since Tuesday so it’s tough to tell if the pulse is affecting the downstream temperatures as intended. With the continued warm weather stay where it’s coolest. We’re seeing mainly Sulphurs with a few Isos.

The East Branch at Fishs Eddy, the Beaverkill at Cooks Falls, and the Mainstem at Lordville all peaked over 70 degrees yesterday. Give these sections a break until we get cooler temps.

What’s Hatching:
Slate Drake – 12-2xl – 12- Isonychia bicolor
Sulphur – #16 – 20 – E. dorothea
Light Cahill – #14 – E. vitreus (male), E. invaria, Stenacron spp.
Dark Blue Wing Olive – #18 – 20 – deficiens, lata
Tiny Blue Wing Olive – #22 – 26 – Pseudocloeon sp.
Yellow Sally Stonefly – #14 – Isoperla spp.
Tan Spotted Sedge #16 – 18 – Hydropsyche sp.

Fish were happily eating sulphurs in the evening in the cold water near the dam.

View the current local weather conditions.

Click on any gauge for the most recent data:
West Branch at Stilesville, NY686 cfs46°
West Branch at Hale Eddy, NY705 cfs48°
East Branch at Harvard, NY226 cfs61°
East Branch at Fish’s Eddy, NY365 cfs72°
Mainstem at Lordville, NY1,060 cfsN/A
Beaverkill at Cooks Falls, NY122 cfs73°
West Branch at 191 Bridge60°
West Branch at Walton (Cannonsville inflow)74 cfs70°
Cannonsville Reservoir Release699 cfs
Cannonsville Reservoir Capacity75.6%
Pepacton Reservoir Capacity85.9%
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