Eckman Lake (Lincoln)
Reachcode: 17100205005490 | Area: 57.8 acres | Shoreline: 1.6 mi | View on Interactive Map
(From Atlas of Oregon Lakes, Johnson et al. 1985). Eckman Lake, lying in the lower end of Eckman Slough, is a water impoundment now separated from the Alsea River estuary by the causeway of Oregon Highway 34. The name Eckman is from a Scandinavian settler who lived nearby many years ago. Surface inflow to the lake is from the upstream portions of the slough and through a marshy area on the west side of the lake. Outflow is through a culvert on the northwest end into the Alsea River. The drainage basin is, for the most part, in private ownership with a few blocks of timberland in the upper reaches managed by the Siuslaw National Forest. It is a region of fairly gentle relief which lies on a marine terrace covered by relict, stabilized sand dunes. The shoreline is also in private ownership, except for W. B. Nelson State Park, and consists of a mixture of homes, forested land and marshes. The shoreline is zoned for single-family residential use on the east and west and for rural residential use on the south. One of the major private landowners is the Port of Alsea, and the reservoir itself is zoned as a marine waterway: However, management is primarily the responsibility of the Oregon State Highway Department and the Department of Fish and Wildlife.
Except at the north end, Eckman Lake is very shallow and submerged macrophytes have developed throughout. Bottom material is mostly silt. Major ion chemistry is unusual -- the concentrations of sodium and chloride and the conductivity are the highest of any of the coastal lakes in this survey, suggesting that sea water may leak into the lake from the Alsea River estuary during high tides. The lake sometimes becomes nearly anoxic (oxygen depleted) below the six-foot depth and pH is sometimes quite high. By all indications Eckman Lake should be classified as eutrophic. Local citizens have reported in past years that tailings from upstream quarry operations drain into the lake; however, this has not been verified. Eckman Lake is a highly valuable local recreation facility with swimming, boating and fishing. It contains cutthroat and rainbow trout and, on occasion, coho salmon. The Department of Fish and Wildlife has attempted to establish a warm water fishery, stocking juvenile largemouth bass and adult black crappie.
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.
|Oct. 17, 2011||Myriophyllum aquaticum (parrots feather, parrot feather watermilfoil)||Non-native ODA Class B||IMAP|
|Oct. 15, 2004||Myriophyllum aquaticum (parrots feather, parrot feather watermilfoil)||Non-native ODA Class B||IMAP|