Background Portage Bay Data

This page will include previous collected data on Portage Bay, as well as data collected by ERIS students in an attempt to provide a background context for the ERIS observatory.

Sediment and Water Characteristics:

The following three tables were taken from “Survey of Contaminants in Sediments in Lake Union and Adjoining Waters” by James Cubbage in 1992. The data these tables provide a baseline of many of the types of measurements ERIS will provide continuously for Portage Bay. Click on the table for a larger view.

Physical Characteristics Sediment (paper)

Pesticide & PCB data (paper)

Metal concentrations (paper)

The below two tables were taken from “Lake Union/Ship Canal/Shilshole Bay Water Quality Management Program Data Summary Report Addendum” published in 1986.

Table from Class

Table from Class - screenshot

These bathymetric surveys were recently produced by Emily Cyr and Miles Logsdon and provide a sense of what the underwater topography is a the ERIS site.

firstSurvey2 (1)

Preliminary Bathymetric Survey of Portage Bay ERIS Site: 1/2

firstSurvey3

Preliminary Bathymetric Survey of Portage Bay ERIS Site: 2/2

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