Chapter
Aug 30, 2024
CIP under Pressure: Rethinking Solutions to the CAVSARP System’s High Head without Breaking the Bank
Authors: Tess C. Degginger, P.E. [email protected], Todd L. Crouthamel, P.E. [email protected], Gary Brady, P.E. [email protected], Fletcher McKenzie, P.E. [email protected], and Michael Georgalas, P.E. [email protected]Author Affiliations
Publication: Pipelines 2024
ABSTRACT
The Central Avra Valley Storage and Recovery Project (CAVSARP) was designed to recharge and recover Central Arizona Project (CAP) water in response to water quality issues in Tucson and is supplied by 60-in. welded steel pipe (WSP) and a 54-in. high-density polyurethane (HDPE) pipe. As a pressure system, the head characteristics have been a challenge, since CAVSARP was commissioned. There is a large elevation difference upstream to downstream, so control valve cavitation is a concern at the upstream turnouts with downstream turnouts experiencing low head issues. In 2019, the HDPE transmission main suffered a pipe failure, a 100-ft longitudinal crack. Though pipe replacement was recommended, replacing the flow control valves with plug valves was determined to be a viable alternative. After evaluation of several valves, a 20-in. eccentric plug valve proved to be a suitable solution for CAVSARP’s conditions and saved the utility’s CIP budget $18 million by avoiding pipe replacement.
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REFERENCES
Cash, T., and Kummet, T. (2019, February 26). 4-72" PEC Eccentric Valve Standard Test Specification.
DeZURIK, Inc. (2020, March). Valve Selection Guide (Bulletin 10.00-1). Sartell, Minnesota, United States.
DeZURIK, Inc. (2020, April). Alpha-I Reference Manual. Sartell, Minnesota, United States.
DeZURIK, Inc. (2020). Alpha-I Valve Sizing Program (Version 21.5.12.0) [Computer program]. DeZURIK, Inc. Available from https://www.dezurik.com/programs/.
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Published online: Aug 30, 2024
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1Stantec Consulting Services, Inc. Email: [email protected]
2Stantec Consulting Services, Inc. Email: [email protected]
3Stantec Consulting Services, Inc. Email: [email protected]
4Stantec Consulting Services, Inc. Email: [email protected]
5Stantec Consulting Services, Inc. Email: [email protected]
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