Geologic Hazard Characterization for Metropolitan Water District’s Replacement of Casa Loma Siphon Barrel No. 1, San Jacinto, California
Publication: Lifelines 2022
ABSTRACT
The Casa Loma Siphon Barrel No. 1 is a critical water supply lifeline in Metropolitan Water District of Southern California’s (Metropolitan) water delivery system. The 148-in. diameter siphon was constructed in the 1930s and is part of the Colorado River Aqueduct system. The Siphon conveys water across the San Jacinto Valley and the San Jacinto fault zone (SJFZ) in Riverside County. Evidence of cracking and leakage due to localized non-tectonic settlement was noted in the 1960s as concentrated where the siphon crosses a strand of the SJFZ named the Casa Loma fault (CLF). The existing siphon is vulnerable to failure due to tectonic and non-tectonic displacements at the fault crossing. A geologic investigation was conducted for a retrofit project designed to improve the siphon’s seismic resiliency against potential future ground deformation. Exploratory trenching at the siphon fault crossing and a synthesis of paleoseismic and fault mapping data for the SJFZ provided input to fault displacement hazard analyses, and these results plus analysis of historical settlement data provided constraints for the retrofit design. Deterministic and probabilistic coseismic fault displacements range from 5.9–14.2 ft (1.81–4.33 m) and are consistent with other paleoseismic estimates of single-event displacements along the SJFZ. Ultimately, the pipeline was designed to accommodate 12.8 ft (3.9 m) horizontal and 2.6 ft (0.8 m) vertical of coseismic surface displacement (2,475-year return period) on the CLF and 3.3 ft (1.0 m) of differential settlement for a 50-year design life.
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REFERENCES
Aagaard, B. T., Lienkaemper, J. J., and Schwartz, D. P. (2012). “Probabilistic estimates of surface coseismic slip and afterslip for Hayward fault earthquakes.” Bull. Seism. Soc. Am., 102(3), 961–979.
Ancheta, T. D., Darragh, R. B., Stewart, J. P., Seyhan, E., Silva, W. J., Chiou, B. S.-J., Wooddell, K. E., Graves, R. W., Kottke, A. R., Boore, D. M., Kishida, T., and Donahue, J. L. (2013). PEER NGA-West2 Database, Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA.
Baune, D., and Aryee, E. (2018). “Pipeline protection.” Civil Engineering Magazine, 88(92), 64–75.
Biasi, G. P., and Weldon, R. J. (2009). “San Andreas fault rupture scenarios from multiple paleoseismic records: stringing pearls.” Bull. Seism. Soc. Am., 99(2A), 471–498.
Blisniuk, K., Oskin, M., Meriaux, A.-S., Rockwell, T. K., Finkel, R. C., and Ryerson, F. J. (2013). “Stable, rapid rate of slip since inception of the San Jacinto fault, California.” Geophys. Res. Let., 40, 4209–4213.
Field, E. H., Biasi, G. P., Bird, P., Dawson, T. E., Felzer, K. R., Jackson, D. D., Johnson, K. M., Jordan, T. H., Madden, C., Michael, A. J., Milner, K. R., Page, M. T., Parsons, T., Powers, P. M., Shaw, B. E., Thatcher, W. R., Weldon, R. J., II, and Zeng, Y. (2013). Uniform California Earthquake Rupture Forecast, Version 3 (UCERF3)—The Time-Independent Model,.
Givler, R., Baldwin, J., Seifried, A., Godwin, B., Myers, M., Gregory, P., Baune, D., Nelson, J., Neuman, K., and Crowley, J. (2018). “Penitencia Creek landslide evaluation and seismic retrofit of large-diameter water conveyance pipelines in San Jose, CA.” AEG 2018/IAEG XIII Congress, San Francisco, CA.
Hanks, T. C., and Bakun, W. H. (2014). “M–log A models and other curiosities.” Bull. Seism. Soc. Am., 104(5), 2604–2610.
Hecker, S., Abrahamson, N. A., and Woodell, K. (2013). “Variability of displacement at a point: Implications for earthquake‐size distribution and rupture hazard on faults.” Bull. Seism. Soc. Am., 103(2A), 651–674.
Lofgren, B. E. (1976). “Land subsidence and aquifer-system compaction in the San Jacinto Valley, Riverside County, California – a progress report.” USGS Jour. Res., 4(1), 9–18.
Lohr, L. (1978). Fault Hazard Investigation for Parcel Map No. 11,998, a Portion of Section 19, T. 4S, R. 1W, S.B.B.&M., Riverside County, California.
Metropolitan Water District of Southern California (Metropolitan). (2016). 2016 Survey Summary of Vertical Movement in the San Jacinto Basin Area Affecting the CRA Casa Loma Siphon No. 1, No. 2, and the San Jacinto Pipe.
Morton, M. M. (1977). “Surface deformation in part of the San Jacinto Valley, southern California.” USGS Jour. Res., 5(1), 117–224.
Onderdonk, N. W., Rockwell, T. K., McGill, S. F., and Marliyani, G. I. (2013). “Evidence for seven surface ruptures in the past 1,600 years on the Claremont fault at Mystic Lake, northern San Jacinto fault zone, California.” Bull. Seism. Soc. Am., 103(1), 519–541.
Onderdonk, N. W., McGill, S. F., and Rockwell, T. K. (2015). “Short-term variations in slip rate and size of prehistoric earthquakes during the past 2,000 years on the northern San Jacinto fault zone, a major plate-boundary structure in southern California.” Lithosphere, 7(3), 211–234.
Onderdonk, N. W., McGill, S. F., and Rockwell, T. K. (2018). “A 3,700-year paleoseismic record from the northern San Jacinto fault and implications for joint rupture of the San Jacinto and San Andreas faults.” Geosphere, 14(6), 2447–2468.
Petersen, M. D., Dawson, T., Chen, R., Cao, T., Wills, C. J., Schwartz, D. P., and Frankel, A. D. (2011). “Fault displacement hazard for strike-slip faults.” Bull. Seism. Soc. Am., 101(2), 805–825.
Proctor, R. J. (1962). “Geologic features of a section across the Casa Loma fault, exposed in an aqueduct trench near San Jacinto, California.” Geol. Soc. Am. Bull., 73, 1293–1296.
Rockwell, T. K., Dawson, T. E., Young Ben Horin, J., and Seitz, G. (2015). “Ruptures in the Anza seismic gap, San Jacinto fault, and implications for longterm earthquake production on a major plate boundary fault.” Pure Appl. Geophys., 172(5), 1143–1165.
Salisbury, J. B., Rockwell, T. K., Middleton, T. J., and Hudnut, K. W. (2012). “LiDAR and field observations of slip distribution for the most recent surface ruptures along the central San Jacinto fault.” Bull. Seism. Soc. Am., 102(2), 598–619.
SFPUC (San Francisco Public Utilities Commission). (2008). General Seismic Requirements for Design of New Facilities and Upgrade of Existing Facilities, Revision 1.
Takao, M., Annaka, T., and Kurita, T. (2015). “Establishment of evaluation formulae for probabilistic fault displacement hazard analysis (PFDHA) in Japan.” Best Practices in Physics-based Fault Rupture Models for Seismic Hazard Assessment of Nuclear Installations, Vienna, Austria.
Thompson, S., Madugo, C., Lewandowski, N., Lindvall S., Ingemansson, B., and Ketabdar, M. (2018). “Fault displacement hazard analysis methods and strategies for pipelines.” Proc. 11th Nat. Conf. Earthq. Engnr., Earthquake Engineering Research Institute, Los Angeles, CA.
Wells, D. L., and Coppersmith, K. J. (1994). “New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement.” Bull. Seism. Soc. Am., 84(4), 774–1002.
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