Pine Lake

Lakes Descriptions and Data

Aquatic Plants

Fact Sheets

Lakeside Living Video

Lake Steward Newsletter

Recreation Guide

Reports

Technical Assistance and Questions

Glossary

Pine Lake		Go to another lake:

Vital Statistics Overview Maps Water Quality Data Related Links

Vital Statistics

Watershed Area	469 acres
Lake surface area	88 acres
Maximum depth	39 feet
Mean depth	20 feet
Public Park	Yes
Boat Ramp	Yes, no gas engines
Fish Present	Bass, stocked rainbow

Volunteer monitoring began at Pine Lake in the 1980s and has continued, with some gaps, through 2008. The data indicate this lake is very lightly colored and currently low in primary productivity (oligotrophic) with very good water quality. Productivity appears to have decreased between 1994 – 1998 and is currently steady.

Profile data show thermal stratification is stable through summer, and sedimentary phosphorus release adds a small amount to deep water concentrations. Nitrogen to phosphorus ratios in the upper water are generally above 20:1 during the summer, which often favors other algal species over bluegreens.

Pine Lake has a car top boat launch at the public park, and residents should watch the nearshore environment for early infestations of Eurasian milfoil and other noxious weeds.

Maps


This bathymetric map shows contour lines of equal depth, similar to a topographic map would for mountains and valleys		This map shows the area of the watershed relative to the area of the lake. Generally speaking, the larger a watershed is relative to a lake, the greater the influence land use practices on lake water quality

Click image to enlarge

Water Quality Data

Through a combination of efforts by volunteer lake monitors and King County staff, data relating to physical, chemical, and biological aspects of the lake have been collected for most lakes. The King County Lake Stewardship Program analyzes data to track long-term water quality trends in small lakes in western King County.

View or Download Data
Use this tool to view or download data from the lake in tabular format. You can define date ranges and select which parameters to view or download.

Chart Data
Use the charting tool to look at graphs showing single parameters for a single water year at a time.

Five year water quality trends
A common method of tracking water quality trends in lakes is by calculating the “trophic state index” (TSI) (Carlson, 1977). TSI indicators predict the biological productivity of the lake based on water clarity (Secchi) and concentrations of total phosphorus (TP) and chlorophyll a (Chlor).

The average of these three TSI indicators during the growing season can be used to place lakes in one of three broad categories:
<40 = oligotrophic (low productivity),
40 to 50 = mesotrophic (moderate productivity)
>50 = eutrophic (highly productive).

Pine Lake

Vital Statistics

Overview

Maps

Water Quality Data

Related Links