Rocky River (Michigan)

Rocky River
Rocky River
	The Rocky River in Flowerfield Township
Location
Country	United States
Physical characteristics
Source
• location	Southwest Marcellus Township in Cass County, Michigan
Mouth
• location	St. Joseph River in Three Rivers
Length	28 mi (45 km)
Basin size	450 km2 (170 sq mi)
Discharge
• average	1.5–2.0 m3/s (53–71 cu ft/s)
Basin features
River system	St. Joseph River

The Rocky River is a 28.3-mile-long (45.5 km)^[1] stream located in the southwest part of the U.S. state of Michigan that flows into the St. Joseph River at 41°56′33″N 85°37′59″W / 41.94250°N 85.63306°W / 41.94250; -85.63306^[3] in the city of Three Rivers in St. Joseph County. The Rocky River, along with the St. Joseph River and the Portage River, are the three rivers from which the city of Three Rivers takes its name.

The Rocky River rises in southwest Marcellus Township in Cass County at 41°59′43″N 85°51′04″W / 41.99528°N 85.85111°W / 41.99528; -85.85111.^[3] It flows to the northeast, arcing gently to the southeast before turning sharply to the south in eastern Flowerfield Township, shortly after being joined by the Flowerfield Creek. It then flows mostly southward until joining the St. Joseph River in Three Rivers.

The Rocky River watershed encompasses over 112,000 acres (45,000 ha) and drains all or portions of the following cities and townships:^[2]

Tributaries

(left) Kerr Creek^[4]
- Little Pleasant Lake^[5]
  - Pleasant Lake^[6]
(left) Armalege Drain^[7]
- Goose Lake^[8]
(right) Flowerfield Creek^[9]
- (right) Spring Creek^[10]
(right) Four County Drain^[11]
(left) Ayers Lake^[12]
(right) Sheldon Creek^[13]
- (right) Lewis Lake^[14]
  - Mud Lake^[15]
(left) Pickerel Lake^[16]
- Skyhawk Lake^[17]
- Streaters Mill Pond^[18]
- Bogart Lake^[19]
(right) Huyck Lake^[20]

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