Cottonwood Meadow Lake (Lake)

Reachcode: 18020001001157 | Area: 38.6 acres | Shoreline: 1.5 mi | View on Interactive Map

(From Atlas of Oregon Lakes, Johnson et al. 1985). Cottonwood Meadow Lake is a small artificial lake, created by the U. S. Forest Service and the Oregon Department of Fish and Wildlife in 1961 with the construction of an earthfill dam on Cottonwood Creek. The lake should not be confused with Cottonwood Reservoir which is much lower on the same stream. Cottonwood Meadow Lake was constructed both to enhance irrigation by distributing downstream flows more evenly during the latter part of the growing season in July and August, and to provide recreational benefits. Rainbow trout and brook trout are stocked in the lake and fishing is good, although occasionally impaired in late summer by algal blooms. No motors are allowed on the water and it is open to fishing all year. The Forest Service has provided two small campgrounds and boat ramps.

This shallow, eutrophic reservoir has high phosphorus and chlorophyll concentrations, high pH, limited water transparency, blue-green algal blooms, and macrophytes covering about 80 percent of the reservoir bottom; these conditions are natural and there is no evidence of contribution from the heavy recreational use that occurs in this area. By late summer, dense blue-green algal blooms (Anabaena circinalis and Gloeotrichia echinulata) become apparent and restrict use of the lake for recreation.


Printable Lake Map
No mussel data available.

The list of plants below includes results of aquatic plant surveys conducted by the Center for Lakes and Reservoirs as well as aquatic invasive plant species detections that have been reported to iMap Invasives: an online, GIS-based invasive species reporting and querying tool.

Plants listed in the table below are categorized as native to Oregon, on the Oregon Department of Agriculture’s (ODA’s) Noxious Weed List, on the Federal Noxious Weed List, or non-native but not listed as noxious. Federal Noxious Weed List plants are plants determined by USDA to be serious threats to U.S. agriculture, irrigation, navigation, public health or the environment (7 C.F.R. 360.200). The ODA Noxious Weed categories are:

ODA Class A - weeds either unknown or with small enough infestations to make eradication or containment possible; targeted for eradication or intensive control.

ODA Class B - regionally abundant weeds (may have limited distribution in some counties); targeted for local/regional control on case-by-case basis.

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Date Species Status Source
July 12, 2014 Sagittaria sp. (arrowhead) Native CLR
July 12, 2014 Sparganium sp. (bur-reed) Native CLR
July 12, 2014 Elodea canadensis (common elodea, Canadian waterweed) Native CLR
July 12, 2014 Lemna sp. (duckweed) Native CLR
July 12, 2014 Sparganium emersum (European bur-reed) Native CLR
July 12, 2014 Myriophyllum sibiricum (northern watermilfoil) Native CLR
July 12, 2014 Callitriche hermaphroditica (northern water-starwort) Native CLR
July 12, 2014 Potamogeton richardsonii (Richardson's pondweed) Native CLR
July 12, 2014 Carex sp. (sedge) Native CLR
July 12, 2014 Potamogeton pusillus (slender pondweed) Native CLR
July 12, 2014 Eleocharis sp. (spikerush) Native CLR
July 12, 2014 Nitella sp. (stonewort) Native CLR
July 12, 2014 Ranunculus aquatilis (water-buttercup) Native CLR
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