Publications Home || Browse by topic || Browse by program || Ecology website

Publication Summary

Our Ecology website has changed, which can cause broken links.
To report these, please contact us with the publication and broken link.


Total Maximum Daily Load for Lower Columbia River Total Dissolved Gas

Publication number Date Published
02-03-004September 2002
VIEW NOW Total Maximum Daily Load for Lower Columbia River Total Dissolved Gas (Number of pages: 150) (Publication Size: 1MB)

Trouble viewing? Try these free options.
Author(s) Pickett, P. and R. Harding
Description This Total Maximum Daily Load (TMDL), jointly issued by Oregon and Washington, addresses total dissolved gas (TDG) in the mainstem Lower Columbia River from the Snake River to its mouth. Elevated TDG levels, which can cause “gas bubble trauma” in fish, are caused by spill events at hydroelectric projects, both within the TMDL area and above the upstream boundary. This TMDL sets allocations in terms of excess pressure above ambient, which must be met at compliance locations below each dam in the TMDL area and above McNary Dam for upstream sources. An implementation plan describes short-term and long-term compliance for both ESA and TMDL requirements.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

ADA Accessibility
The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188.
Visit Ecology’s website for more information.
Contact EAP Publications Coordinator at 564-669-3028 or
Keywords Lower Columbia River, Endangered Species Act, Snake River, dams, ocean, environmental, report, flow, goals, Columbia River, fish, 303(d), river, plan, water, Total Maximum Daily Load, spill, spills, endangered species, Environmental Protection Agency
WATERSHED Water Resource Inventory Area CR Columbia River

Total Maximum Daily Load for Lower Snake River Total Dissolved Gas

Total Dissolved Gas Monitoring Results Columbia and Snake Rivers, May-July 2002