Chapter
Aug 4, 2014
Combined Sewer System Capacity Risk Assessment and Mitigation
Authors: David Whitaker [email protected], Ruben Gonzalez [email protected], and Virgil Adderley [email protected]Author Affiliations
Publication: Pipelines 2014: From Underground to the Forefront of Innovation and Sustainability
Abstract
The City of Portland, Oregon, Bureau of Environmental Services (BES) recently completed a wastewater sewer system plan to address capacity and structural deficiencies in the combined and separated sewer systems. BES developed this plan by applying asset management principles for business risk (in dollars). Risk is defined as the product of consequence of failure (in dollars) and likelihood of failure (probability). Projects were developed to mitigate the deficiencies and meet BES levels of service (LoS). BES considered impacts of structural and capacity failures, including sinkholes from collapsed sewers, basement sewer backups, surface flooding, and emergency repairs. This paper focuses on the assessment and mitigation of capacity risk by describing 1) the modeling system used to characterize and develop alternatives for mitigating the capacity LoS deficiencies and 2) how asset management, risk-based methods were used to select preferred alternatives and prioritize the implementation of recommended projects in the capital improvement program (CIP). These projects will eliminate or significantly reduce street flooding risk and basement sewer backup risk (BSBR) for the 25-year design storm, which is a BES technical LoS related to the protection of public health.
Get full access to this article
View all available purchase options and get full access to this chapter.
Information & Authors
Information
Published In
Copyright
© 2014 American Society of Civil Engineers.
History
Published online: Aug 4, 2014
Permissions
Request permissions for this article.
Authors
Affiliations
P.E.
Civil Engineer, DK Whitaker Engineering, 4325 NE Failing St., Portland, OR 97213. E-mail: [email protected]
P.E.
Engineering Associate, Asset Systems Management Division, Bureau of Environmental Services City of Portland, 1120 SW 5th Ave., Room 1100, Portland, OR 97204-1912. E-mail: [email protected]
P.E.
Principal Engineer, Asset Systems Management Division, Bureau of Environmental Services City of Portland, 1120 SW 5th Ave., Room 1100, Portland, OR 97204-1912. E-mail: [email protected]
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.
Cited by
View Options
Get Access
Access content
Please select your options to get access
Log in/Register
Log in via your institution (Shibboleth)
ASCE Members:
Please log in to see member pricing
Purchase
Save for later Item saved, go to cart Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Get Access
Access content
Please select your options to get access
Log in/Register
Log in via your institution (Shibboleth)
ASCE Members:
Please log in to see member pricing
Purchase
Save for later Item saved, go to cart Information on ASCE Library Cards
ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.