LONG LAKE -- THURSTON COUNTY: 1997

Long Lake is located 5.5 miles east of Olympia. It consists of two basins, which are connected by a narrow neck. It is two miles long and has two islands, Holmes Island (13 acres) and Kirby Island (2.4 acres). Long Lake is fed by Pattison Lake and drains via Himes/Woodland Creek and Lois Lake to Henderson Inlet.

Size (acres)                         330
Maximum Depth (feet)                  21
Mean Depth (feet)                     12
Lake Volume (acre-feet)             3960
Drainage Area (square miles)        8.25
Altitude (feet)                      153
Shoreline Length (miles)             7.1

Contour Map

Source of morphometric data: Water Supply Bulletins 42, 43, and 57.


VOLUNTEER-COLLECTED SECCHI DATA ________________________________________________________________________________________________________________________ Date Temperature Water %Cloud Recent Secchi Lake (Y/M/D) (C) (F) pH Color Cover Rain Wind (ft) Ht(in) Abbrev. Comments ________________________________________________________________________________________________________________________ STATION 1 97/05/10 18.9 66.0 Grn-brown 50 None Breezy 7.0 3.0 LAKE LEVEL VERY HIGH. 97/05/25 20.0 68.0 Grn-brown 100 Light 8.0 1.0 GREEN PAINT ALGAE. 97/06/02 Grn-brown 100 Light Light 8.0 -2.0 97/06/16 21.1 70.0 Grn-brown 10 None Calm 10.0 -5.0 97/07/02 22.8 73.0 Grn-brown 0 None Light 11.0 -8.0 97/07/12 22.8 73.0 Grn-brown 0 None Calm 12.5 -10.0 97/07/26 23.9 75.0 Grn-brown 50 None Light 12.0 -12.0 ALGAE (BRIGHT GREEN FRAGMENTS IN WATER). 97/08/08 25.6 78.1 Grn-brown 50 None Light 10.0 13.5 DISCOVERED MILFOIL OFF MY FLOAT. 97/08/21 24.4 75.9 Grn-brown 75 Light Light 8.0 13.5 LARGE BAND 25' WIDE FOUND 200' OFF MY DOCK. 97/08/28 21.1 70.0 Grn-brown 100 Light Light 5.5 -12.0 ALGAE PRESENT IN WATER. 97/09/18 17.8 64.0 Grn-brown 100 Heavy Breezy 5.0 -11.0 MORNING GREEN SCUM ON WATER. 97/10/12 15.6 60.1 Grn-brown 50 None 6.0 -10.0 HEAVY RAIN FOR 3 WEEKS. 97/10/25 13.3 55.9 Grn-brown 50 None Calm 8.0 -9.3 ALGAE ON SURFACE. ________________________________________________________________________________________________________________________
LABORATORY RESULTS ________________________________________________________________________________________________________________________ Total Total Fecal Col. Bacteria Turb- Suspended Solids Phosphorus Nitrogen Chlorophyll (colonies/100 mL) idity Total Non-Volatile Color Date Strata (ug/L) (mg/L) (ug/L) Site 1 Site 2 (NTU) (mg/L) (mg/L) (Pt-Co) ________________________________________________________________________________________________________________________ There are no LWQA Program chemistry data for this lake in 1997. ________________________________________________________________________________________________________________________
SUMMARY OF VOLUNTEER SURVEY There was no survey response for 1997. FIELD OBSERVATIONS OF ECOLOGY STAFF 8-28-97 Many macrophytes observed. Information regarding water chemistry and other lake data was provided by Thurston County Environmental Health.
TROPHIC STATUS Estimated Trophic State: Eutrophic Mean Trophic State Index (Secchi): 46 (Mesotrophic) Mean Trophic State Index (Total Phosphorus): 0 (Not assessed) Mean Trophic State Index (Chlorophyll a): 0 (Not assessed)
SUMMARY AND EXPLANATION OF TROPHIC STATE ASSESSMENT Although Secchi data may suggest a mesotrophic lake, data provided by Thurston County Environmental Health suggests a lake that is more nutrient rich than the Secchi readings might imply. Summertime phosphorus concentrations are quite elevated and dissolved oxygen concentrations are depleted, especially in the hypolimnion. Substantial blue-green algal blooms and abundant macrophyte densities further support an eutrophic assessment for Long Lake.
COMMENTS FROM 95/11/02 AQUATIC PLANT SURVEY visited to observe installation of bottom barrier. collected more of the milfoil, not sure what species it is
AQUATIC PLANT LIST (This list may be from multiple years and sources.)Iris pseudacorus (yellow flag) Myriophyllum sp. (water-milfoil) Myriophyllum spicatum (Eurasian water-milfoil) Nitella sp. (stonewort) Nuphar lutea (yellow water-lily) Typha sp. (cat-tail)


Data collected and provided by Washington Department of Ecology's Lake Monitoring Program (Maggie Bell-McKinnon, phone 360-407-6124).

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