Dam Safety Modification Report

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Journal Article
Published: 10 November 2022
Environmental & Engineering Geoscience (2023) 29 (1): 53–65.
...) for flood risk management. The project has a right abutment cut-and-cover outlet conduit founded upon karstic limestone. In 2012, a Dam Safety Modification Report (DSMR) was completed that identified multiple internal erosion-related potential failure modes requiring mitigation. The DSMR recommended a multi...
Journal Article
Published: 01 August 2010
Environmental & Engineering Geoscience (2010) 16 (3): 229–243.
... the structural deficiencies of East Branch Dam. In 2009, a joint COE–USBR PFMA was undertaken using procedures from both agencies. Current dam safety efforts involve reassessing potential failure modes, preparing a Dam Safety Modification Report, evaluating various remedial alternatives, and recommending a long...
FIGURES | View All (8)
Series: DNAG, Centennial Special Volumes
Published: 01 January 1991
DOI: 10.1130/DNAG-CENT-v3.429
EISBN: 9780813754154
... documentation of geologic conditions exposed in significant excavations and modification of designs to cope with “changed conditions” are routine elements of major construction projects such as dams, tunnels, power plants, and highways. Unless required by a local ordinance, as-built geological mapping...
Journal Article
Published: 01 February 2023
Environmental & Engineering Geoscience (2023) 29 (1): 17–39.
... modifications, or unexpected developments. Any conditions that present themselves as dam safety issues are expected to trigger a stop-work response, implementation of risk-reduction measures, and, if necessary, activation of the TCEAP. These incidents are required to be reported immediately to FERC...
Journal Article
Published: 06 December 2022
Environmental & Engineering Geoscience (2023) 29 (1): 41–51.
...Jeffrey A. Schaefer Abstract Structural modifications to dams and levees can create life safety risks during the construction period. It is important for all parties involved to understand the potential risk, evaluate methods to mitigate risk, and consider the risk when making decisions. Most...
Journal Article
Published: 01 May 2021
Earthquake Spectra (2021) 37 (2): 1223–1226.
...Pierre Léger, M.EERI There is a large body of technical literature devoted to seismic safety assessment of concrete dams. However, the information is widely scattered in electronic databases, specialized journals, research papers, conference proceedings, and technical reports. A.K. Chopra’s new...
Journal Article
Published: 01 February 2005
Environmental & Engineering Geoscience (2005) 11 (2): 185–187.
... particular significance to dam safety and floodplain protection of critical structures, such as nuclear reactors, and to engineering geology and fluvial geomorphology in general. This monograph, by the principal actors in paleoflood hydrology, is rich in detail, definitive in scope, and of moderate cost ($75...
Journal Article
Published: 14 February 2018
Environmental & Engineering Geoscience (2018) 24 (1): 75–88.
... infilling, these pressures would also have a high likelihood of causing hydrofracturing in the dam and, thus, are not allowed on typical USACE dam safety modification projects. As can be seen in Figure 2 , most of the grouting at Wolf Creek prior to the first wall was performed as a remedial measure...
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Journal Article
Published: 01 February 2019
Earthquake Spectra (2019) 35 (1): 211–231.
.... The proposed methodology is applied to a case study dam in northeastern Canada, whose fragility is assessed through comparison with previous studies and current safety guidelines. It is observed that the more accurate procedure proposed herein produces less conservative fragility estimates for the case study...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 02 February 2021
Lithosphere (2021) 2021 (1): 7866225.
... selection, distance calculation, elevation modification, data discretization, data statistics, and curve plotting. The Yellow River Guxian Dam is chosen as a field case study. We classify rock types of feldspar sandstone, fine sandstone, and conglomerate into hard rocks and that rock types of calcareous...
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Journal Article
Published: 14 February 2018
Environmental & Engineering Geoscience (2018) 24 (1): 121–136.
... of the project, seepage reduction measures, including a partial-depth seepage barrier wall through the embankment and a grout curtain in the left abutment, were designed and constructed. These dam safety modifications were constructed between 2014 and 2016. During flood events, Bolivar Dam experiences excessive...
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Journal Article
Published: 01 August 2010
Environmental & Engineering Geoscience (2010) 16 (3): 291–298.
... of these modifications were the following: Lowering of the dam crest by 85 ft (26 m), to an elevation of 3,378 ft (1,030 m), and of the maximum operating pool, to an elevation of 3,355 ft (1,023 m), thus reducing the reservoir capacity by 61 percent, down to 78,000 acre-feet (96 million m 3 ), and the dam height...
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Journal Article
Published: 14 February 2018
Environmental & Engineering Geoscience (2018) 24 (1): 111–120.
... map. The evaluations are referred to as Screening Portfolio Risk Assessments (SPRA), and as a result of this preliminary screening, the USACE designated Martis Creek Dam as one of the highest risk Corps-administered dams in the United States. Martis Creek Dam was ranked Dam Safety Action Class...
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Journal Article
Published: 01 August 2010
Environmental & Engineering Geoscience (2010) 16 (3): 299–314.
... with geotechnical experts in coal refuse and metal tailings impoundment construction from academia, other federal agencies, and the industry, and (3) geotechnical articles obtained through literature searches and through direct contacts with the authors. The final report included modifications in response...
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Journal Article
Published: 01 January 1937
Bulletin of the Seismological Society of America (1937) 27 (1): 1–27.
... I I - I X on the Rossi-Forel scale, but no serious effect was reported. flames D. Schuyler, "Reservoirs for Irrigation, Water Power and Domestic Water Supply," Engineering News (September 11, 1902). ~0 0 ~c~o r~ © c~ ~o CHARACTERISTICS OF ACTIVE FAULTS AI~D SAFETY OF DAMS 7 The date of the most...
Journal Article
Published: 01 August 2010
Environmental & Engineering Geoscience (2010) 16 (3): 183–193.
... strong rock. “Test sections” have proven to be extremely valuable, especially for contractors to refine their means, methods, and quality-control systems. Such programs have also given the dam safety officials and owners the opportunity to gain confidence and understanding in the response...
Journal Article
Published: 15 June 2021
Bulletin of the Seismological Society of America (2021) 111 (5): 2673–2695.
... geologic features (FGFs) to set formal design earthquake motions for a major existing engineered structure. The safety evaluation earthquake (SEE) spectrum for the Clyde Dam, New Zealand (the mean 10,000 yr, ka, return period response spectrum) is developed in accordance with official guidelines...
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Journal Article
Published: 01 August 2011
Mineralogical Magazine (2011) 75 (4): 2401–2418.
... ) Alkali aggregate reaction in a 60-year-old dam in Australia . The International Journal of Cement Composites and Lightweight Concrete , 10 , 259 – 266 . SKB ( 2006 ) Long-term safety for KBS-3 repositories at Forsmark and Laxemar – a first evaluation . Main report of the SR-Can project. SKB...
Journal Article
Published: 01 August 2017
Earthquake Spectra (2017) 33 (3): 1191–1218.
... existing levees. While the New Zealand guidelines are optional, upgrades to existing levees or design of new levees in recent years typically follow the NZSOLD Dam Safety Guidelines (2015) document. In addition to the selected documents, we gathered information for other countries. Chile lacks...
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Journal Article
Published: 01 January 1997
Seismological Research Letters (1997) 68 (1): 199–222.
..., 1995, and development of a model of forward rupture directivity effects applicable in California . Proceedings of the Western Regional Technica; Seminar on Earthquake Engineering for Dams, Association of State Dam Safety Officials , Sacramento , April 11–12 , 1996. Wald , D.J. , L.J...