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Coquille Watershed Association
Introduction to the Coquille Watershed
Also see Assessments & Ed.to learn more about the Coquille Watershed.
The Coquille River and Major Tributaries

The 1059 square mile Coquille River Watershed is the largest river system in Oregon to originate from the Coast Range. The majority of the Coquille Watershed lies in Coos County, Oregon. The remainder is in Douglas County and a small area of Curry County. The Coquille's three major tributaries; the North (including the East Fork), Middle, and South Forks; join the mainstem within a few miles up and down stream of the town of Myrtle Point and flow into the Pacific Ocean at Bandon.

Main Stem Coquille River and Estuary

Although the watershed is large, the estuary of the Coquille is one of the smaller in the state. The lower bay of the Coquille is long and narrow, measuring about 763 acres. The estuary contains over 380 acres of tidelands, and 383 acres of permanently submerged land. Eelgrass beds, wetlands, and tidal flats provide feeding, spawning, breeding, nesting, and nursery areas for many species of terrestrial and aquatic life.

Despite the historical diking and filling of many acres of wetlands, creek, and slough environments, the lower river area continues to be a very important rearing environment for anadromous fish such as shad and juvenile Chinook salmon.

Length, Gradient, and Drainage Area

Length
Average Gradient
Drainage Area
(miles)
(feet/miles)
Percent (%)
(square miles)
Main Stem
36.3
1
0.02
172
South Fork
62.8
47
0.89
288
Middle Fork
40.3
35
0.66
310
North Fork
53.3
30
0.57
154
East Fork
33.8
70
1.33
135
Total
226.5
1059

Land Use and Ownership

Currently, the population within the watershed is estimated at 16,801 people. The population is concentrated in the valley areas with the majority clustered around the incorporated towns of Bandon, Coquille, Myrtle Point, and Powers. The more densely populated valley areas are confined to the flood planes along the main stem, four forks, and larger order streams. Land uses in this area are predominantly residential and industrial sites commercial and service business, crop and pasture lands, and gravel extraction. Pastureland does extend into the hills above the flood planes in some areas.

The steep slopes above the valley areas are very sparsely populated. Timber production, agriculture, and some mining are the predominant land uses. Approximately 70% of the watershed is forested. The upper reaches of all four forks of the river and most tidewater streams are commercial forests.

Coquille Bay at Bandon
Location map, click to explore watershed
Middle Fork Subbasin
Certified Organic Dairies in the Coquille Watershed
Coquille Watershed Association

223 N. Alder, Suite D, Coquille, Oregon 97423 Phone: (541) 572-2541 Fax: (541) 572-0193

E-mail the Coordinator