Collard Lake (Lane)

Reachcode: 17100206000578 | Area: 41.4 acres | Shoreline: 2.2 mi | View on Interactive Map

(From Atlas of Oregon Lakes, Johnson et al. 1985). Collard Lake is a small, sheltered, natural lake on the central Oregon coast and was named for Roy Collard who took up a homestead near the lake many years ago. Collard and North Collard Lakes are uppermost in a chain of Lane County lakes that also includes Clear and Munsel Lakes immediately to the south. The Collard Lake basin is a deep, steep-walled depression bordered by sand dunes to the west which in many places rise to 50 feet or more above the water level. These dunes are moving towards the northeast and slowly encroaching on the water. There is no discernible surface inflow into the lake; water enters by seepage and by direct precipitation. Surface outflow to Clear Lake is through Collard Creek at the south end under a dense cover of brush and willows. The water level varies seasonally by two to three feet in response to seasonal fluctuations in the regional water table. The geologic origin of the lake and a description of surface drainage of the area is given in the Clear Lake report earlier in this volume.
Along the east shore are the relatively steep slopes of the foothills of the Coast Range. This terrain is owned by private timber interests and much of it has been logged off. The shoreline of both Collard and North Collard Lakes is entirely in private ownership, with development on the north and northeast sides where there are several residences. In the last few years this development has been particularly intensive. The only access to the lake is over a private dirt road, a former logging road which is in poor condition. Small boats can be launched at the end of the road if permission is obtained from local property owners. No motorboats are permitted. Very little recreational use is made of the lake from anyone other than local residents, but the potential for further recreational development exists. Cutthroat trout and largemouth bass are reported to inhabit the waters, but fishing pressure is light.
The water in Collard Lake has low conductivity and alkalinity, but it does show some enrichment with sodium and chloride. Thermal stratification develops in the summer and there is, on occasion, a pronounced depletion of oxygen in the deeper water, the hypolimnion. The concentrations of total phosphorus and chlorophyl and the water transparency suggest that the lake is mesotrophic to oligotrophic, whereas the oxygen depletion and the species of phytoplankton (Melosira granulata, Scenedesmus bijuga and Chroococcus turgidus) suggest a more eutrophic condition, although Chroococcus turgidus is also found in oligotrophic waters. A classification of mesotrophic is thus suggested by the combination of indicators. Retention time of water in Collard Lake is above average for coastal lakes, because of the relatively small drainage basin. This long retention time probably contributes to the observed oxygen depletion. About 25 percent of the lake is shallower than 10 feet, and there is some growth of water lilies and other macrophytes in the narrow constriction between the two basins. Any degradation of water quality in Collard Lake due to future development on the shoreline or for any other reason is of particular concern because the lake discharges into Clear Lake, which is used as a municipal water supply.

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
- Utricularia vulgaris (common bladderwort) Native CLR
- Najas flexilis (common naiad) Native CLR
- Potamogeton robbinsii (fern leaf pondweed) Native CLR
- Nymphaea odorata (fragrant waterlily) Non-native CLR
- Potamogeton amplifolius (large-leaf pondweed) Native CLR
- Lilaeopsis occidentalis (lilaeopsis) Native CLR
- Potamogeton pusillus (slender pondweed) Native CLR
- Schoenoplectus subterminalis (water clubrush) Native CLR
- Brasenia schreberi (watershield) Native CLR
- Isoetes occidentalis (western quillwort) Native CLR
- Myriophyllum hippuroides (western watermilfoil) Native CLR
- Nuphar polysepala (yellow water-lily) Native CLR
Aug. 15, 2003 Nymphaea odorata (fragrant waterlily) Non-native IMAP