West Branch Delaware River

West Branch Mohock Branch
West Branch flowing under the Hamden Covered Bridge
Map of the upper Delaware River watershed, showing major tributaries
Location
Country	United States
State	New York
Region	Catskills
Counties	Schoharie, Delaware
Towns	Stamford, Delhi, Hancock, Deposit
Physical characteristics
Source	Unnamed pond
• location	North of Mount Jefferson
• coordinates	42°27′16″N 74°36′01″W / 42.45444°N 74.60028°W / 42.45444; -74.60028[1]
Mouth	Delaware River
• location	Hancock
• coordinates	41°56′20″N 75°16′45″W / 41.9389755°N 75.2790615°W / 41.9389755; -75.2790615[1]
• elevation	883 ft (269 m)[1]
Length	90 mi (140 km)
Basin size	666 sq mi (1,720 km2)[2]
Discharge
• location	Walton
• average	469 cu ft (13.3 m3)
• minimum	12 cu ft (0.34 m3)
• maximum	28,600 cu ft (810 m3)
Discharge
• location	Hale Eddy
• average	780 cu ft (22 m3)
• minimum	17 cu ft (0.48 m3)
• maximum	43,400 cu ft (1,230 m3)
Basin features
River system	Delaware River
Tributaries
• left	Little Delaware River
• right	West Brook, Oquaga Creek

The West Branch Delaware River is one of two branches that form the Delaware River. It is approximately 90 mi (144 km) long, and flows through the U.S. states of New York and Pennsylvania. It winds through a mountainous area of New York in the western Catskill Mountains for most of its course, before joining the East Branch along the northeast border of Pennsylvania with New York.^[2] Midway or so it is empounded by the Cannonsville Dam to form the Cannonsville Reservoir, both part of the New York City water supply system for delivering drinking water to the City.^[3][4]