Wallkill River

Wallkill River
Wallkill River
	Islands in the river near Walden, NY
	The combined watersheds of the Wallkill and Rondout Creek
Native name	Twischsawkin
Location
Country	United States
State	New York, New Jersey
Counties	Ulster, NY, Orange, NY, Sussex, NJ
Cities	New Paltz, NY, Walden, NY, Montgomery, NY, Sparta, NJ
Physical characteristics
Source	Lake Mohawk, New Jersey
• location	Sparta, Sussex County, NJ
• coordinates	41°01′58″N 74°38′38″W / 41.03278°N 74.64389°W
• elevation	720 ft (220 m)
Mouth	Rondout Creek
• location	Rifton, Ulster County, NY
• coordinates	41°51′13″N 74°02′55″W / 41.85361°N 74.04861°W
• elevation	0 ft (0 m)
Length	88 mi (142 km)
Basin size	785 sq mi (2,030 km2)
Discharge
• location	Gardiner, NY
• average	1,365 cu ft/s (38.7 m3/s)
Basin features
Tributaries
• left	Shawangunk Kill
• right	Papakating Creek

The Wallkill River, a tributary of the Hudson, drains Lake Mohawk in Sparta, New Jersey, flowing from there generally northeasterly 88.3 miles (142.1 km)^[1] to Rondout Creek in New York, just downstream of Sturgeon Pool, near Rosendale, with the combined flows reaching the Hudson at Kingston.

The river is unusual because it flows north between two major south-flowing rivers, the Hudson and the Delaware River. It also has the unusual distinction of being a river that drains into a creek, due to being impounded shortly before the Rondout confluence into a small body of water called Sturgeon Pool near Rifton, and what reaches the Rondout from there is the lesser flow.

^ ^a ^b U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-03-29 at the Wayback Machine, accessed October 3, 2011
^ Ulster County Soil and Water Conservation District, 2005, Draft Wallkill Watershed Conservation and Management Plan Archived 2007-07-15 at the Wayback Machine, 11, retrieved March 21, 2007.
^ United States Geological Survey; Wallkill River at Gardiner, NY; average annual discharge table. Figure given is for 2005. Retrieved March 14, 2007.

[NHD-1] U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National Map Archived 2012-03-29 at the Wayback Machine, accessed October 3, 2011

[Watershed_plan-2] Ulster County Soil and Water Conservation District, 2005, Draft Wallkill Watershed Conservation and Management Plan Archived 2007-07-15 at the Wayback Machine, 11, retrieved March 21, 2007.

[Gardiner_discharge-3] United States Geological Survey; Wallkill River at Gardiner, NY; average annual discharge table. Figure given is for 2005. Retrieved March 14, 2007.

[1]

[2]

[3]