Rail & Transit
Willamette River Transit Bridge
Portland, Oregon.
Portland, Oregon.
-
Completed in
Completed in
2014
2014
The Willamette River Transit Bridge is part of the Portland-Milwaukie Light Rail project. The project includes construction of a new light rail transit line from downtown Portland, Oregon to the central business district of Milwaukie and into Clackamas County.
The bridge is an approximately 80-ft wide and 1720-ft long cable-stayed bridge structure with five spans. The contract was procured through a design-build delivery system. EMI provided geotechnical engineering related to seismic analysis, soil-structure interaction, and foundation design for the design-build team.
The bridge is supported on six bents and towers. Two towers, located within the Willamette River, are supported on groups of 10-ft diameter drilled shafts. Osterberg pile load tests were performed to verify the foundation design. Evaluation of liquefaction and lateral spreading was carried out to ensure the satisfactory performance of the river slope.


















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Fountain Valley (Head office)
17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826
Inland Empire
765 North Main Street
Suite 136
Corona, CA 92880
(714) 751-3826
San Francisco Bay Area
3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833
San Diego
820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222
At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.
By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.
This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.
Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.
If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.
Fountain Valley (Head office)
17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826
Inland Empire
765 North Main Street
Suite 136
Corona, CA 92880
(714) 751-3826
San Francisco Bay Area
3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833
San Diego
820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222
At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.
By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.
This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.
Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.
If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.
Fountain Valley (Head office)
17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826
Inland Empire
765 North Main Street
Suite 136
Corona, CA 92880
(714) 751-3826
San Francisco Bay Area
3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833
San Diego
820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222
At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.
By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.
This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.
Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.
If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.
Fountain Valley (Head office)
17800 Newhope Street
Suite B
Fountain Valley, CA 92708
(714) 751-3826
Inland Empire
765 North Main Street
Suite 136
Corona, CA 92880
(714) 751-3826
San Francisco Bay Area
3541 Investment Boulevard
Suite 4
Hayward, CA 94545
(510) 562-8833
San Diego
820 Los Vallecitos Boulevard
Suite H
San Marcos, CA 92069
(760) 736-8222
At Earth Mechanics Inc. (EMI), your privacy is our priority. We do not collect or use your personal information for marketing purposes. All communications via SMS are strictly conversational in nature and initiated based on your interactions with EMI.
By providing your phone number, you consent to receive occasional, conversational SMS messages from Earth Mechanics Inc. Message frequency may vary, with an average of 1–2 messages per month. SMS numbers are never sold, shared, or disclosed to third parties without your explicit consent, except as required by law. All personal data, including SMS correspondence, is stored securely and handled in accordance with our privacy standards. We do not transfer your information to external organizations under any circumstances unrelated to legal compliance.
This website may include embedded content (e.g., videos, images, or articles) from third-party websites. Such content behaves as if you visited the third-party site directly. These websites may collect data, use cookies, and track your interaction with the embedded content—especially if you are logged in to their platform.
Some media assets used on this site, including video content, are licensed from Adobe Stock under appropriate licensing terms. These assets are used in compliance with Adobe’s Enhanced License, and no attribution is required.
If you have any questions about this policy or your data privacy, please contact us at info@earthmech.com.