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Protect the Lake Whatcom Drinking Water Reservoir

The Watershed Is Not Being Preserved!     The Consequences in Health and Cost!
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Abstract of DOE Report:
Abstract - Page 9/71 (emphasis added)

Lake Whatcom is impaired for dissolved oxygen due to phosphorus loading. Lake tributaries also fail to meet fecal coliform bacteria standards. The goal of this study is to determine total maximum daily loads of these pollutants.

Monitoring surveys were conducted in 2002 and 2003. For dissolved oxygen, a CE-QUAL-W2 lake model was calibrated for those two years. An HSPF watershed model was developed to develop flow and phosphorus lake model inputs based on land use conditions.

Watershed model land uses were adjusted to produce scenarios for evaluating Lake Whatcom’s response to phosphorus. Base (2002-03) land uses were changed to mixed forest to estimate natural loading (Full Rollback). Base land uses were changed to maximum allowable development levels to estimate future loading (Full Buildout). Finally, land uses in the Base and Full Buildout scenarios were each partially rolled back to meet water quality standards.

For evaluating standards, the lake model was looped multiple times by rerunning 2003 conditions as if they were consecutive years. Dissolved oxygen levels were compared between scenarios using cumulative lake volumes. The dissolved oxygen lake criterion of 0.2 mg/L was subtracted from the Full Rollback scenario to create site-specific targets for this TMDL.

Loading capacities for total phosphorus and developed acres that generate phosphorus loading at 2003 levels are calculated for two pollutant reduction scenarios, to provide information for the future selection of final loading capacity and allocations.

Bacteria levels in eleven tributary streams and drains did not meet standards. The statistical roll back method was used to determine geometric mean targets for bacteria corresponding to the 90th percentile criteria of 100 cfu/100 mg/L. A Beales ratio estimator formula was used to calculate the annual fecal coliform loads, and bacteria reduction targets were calculated. Pollutant allocations are recommended for tributary fecal coliform bacteria.


Source: Lake Whatcom TMDL Technical Report InfExt DRAFT Main.pdf

Protect Lake Whatcom: This website is maintained by a concerned citizen, developed for a Citizens' Initiative brought forth in 1999, with the purpose of directing the City to implement Goal #2 of their own 21 Goals for the management and preservation of the Reservoir. Copyright 1999-2008 ©LakeWhatcom.org. c: [an error occurred while processing this directive] Our bottom-line principles are: Protect the water supply in perpetuity -- maintain ecological viability of the lake for natural species -- distribute the financial burden fairly among those benefitting -- take immediate action if prudent -- take definitive action -- avoid actions which cut off future options.
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