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Event
AEG OR Chapter April 18, 2017 Meeting
Risk-Based Rockfall Mitigation Strategies in Hawaii
PURCHASE OF TICKETS USING BROWN PAPER BAG: Ticket sales stops by 4 pm on Sunday April 16th.
(At the door payments in Cash or Checks only.)
6:00 Social Hour
6:45 Dinner (Salad and Pizza)
7:30 Presentation
PRESENTATION:
Speakers: Tim Blackwood, Hart Crowser, Inc.
ABSTRACT:
Rockfall hazards are common within the State of Hawaii, exposing the public to potential property damage or physical harm along roadways, in public gathering spaces, and within their homes. Three approaches to address rockfall hazards are to: 1) identify a hazard and mitigate it regardless of the level of risk, 2) classify or rank the hazard at multiple sites relative to others and mitigate based on an agreed to or relative risk threshold, and 3) complete a quantitative risk-based assessment of a site and mitigate the risk that exceeds an acceptable level to society. Method 1 is limited in that the risk is neither ranked nor quantified, resulting in potential higher expense, construction of unsightly structures and damage to natural areas to mitigate hazards that may present a low risk. Method 2 addresses relative risk within a selected hazard population, but not relative to other hazard populations, and may also lead to expenditures for hazards with low risks compared to other hazards. Method 3 has the benefit of evaluating risks relative to a quantitative risk threshold in the context of other risks to which society is exposed. This presentation discusses the application of Method 3 to three sites in Hawaii, the Palolo Valley and Kaiwi Shoreline sites on Oahu, and the Ko Road site on Kauai. The presentation will describe the analytical methods used, selection of appropriate parameters for input, and the results and mitigation strategies selected for each site.
SPEAKER BIOS:
TIM BLACKWOOD is the managing principal of Hart Crowsers Portland office. Tim is a registered engineering geologist and professional engineer. He completed his BS in geology at Portland State University in 1993 and MS in geotechnical engineering in 1995. Tims Masters research was on the effects of forest practices to slope stability within the City of Forest Groves municipal watershed. After graduating from the program, Tim took a position as slope stability specialist on Weyerhaeusers watershed assessment team in Oregon. Tim practices in many classic areas of the geotechnical field but has specialized in geotechnical hazards throughout his career 25-year career in the Northwest. Slope stability and rockfall hazards, which draw from both geologic and engineering disciplines, have been particular areas of focus. Tim began working in Hawaii in 2003, eventually opening Hart Crowsers Honolulu office in 2014. Currently the office has a staff of 6, including two geotechnical staff. Over half of our geotechnical work from the Honolulu office is rockfall related, with significant municipal projects in progress on Kauai and Maui, and multiple projects on Oahu.
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LocationOld Market Pub (View)
6959 SW Multnomah Blvd.
Portland, OR 97223
United States
Categories
| Kid Friendly: Yes! |
| Dog Friendly: No |
| Non-Smoking: Yes! |
| Wheelchair Accessible: Yes! |
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Contact
| Owner: Oregon AEG |
| On BPT Since: Nov 06, 2016 |
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| Chris Humphrey |
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