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.
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.
|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|