Today is the final chapter for my anaylsis. Next week I will bring you an interview, and several podcasts of ideas we can do in the community.
Click here for Part 1: Introduction, maps and fuel
Click here for Part 2: Timelines, Japan, food and Bridges Click here for
Click here for Part 3: Coastal Communities and Critical Buildings
Click here for Part 4: Land, Sea and Air
Click here for the Oregon Resilience Report.The page numbers are the electric (vs. print out) number and not the true page numbers.
Local Roads and Streets
“In addition to local roads and streets, Oregon has thousands of miles of forest roads, and it may be possible to use these for low-volume, temporary local detours in the event of a major disaster. Many of these forest roads are privately owned and will also be subject to significant damage in a Cascadia subduction zone earthquake. Nonetheless, such local-road detours will likely serve emergency responders, repair crews, and vehicles transporting food and other critical supplies, and will therefore play an important role as recovery efforts progress and a minimum level of service is restored.” Pg156
Chart of when they would like to be up and running. Page 157
“Analysis suggests that the longer the state delays increasing its investment in bridge and slope strengthening, the greater the cost and potential adverse effects an earthquake will have on the state’s economy. If risks related to bridges and slopes are left unaddressed, the odds grow every day that we will be unprepared for an increasingly likely major earthquake.” pg162
“Several other proposed local alternative routes are included in the Local Agency Alternatives to State Highway Lifeline Routes, a supplement to this Report. These routes will be studied at a later time as possible alternatives to state highway lifeline routes.” Pg 172
Energy
Oregon’s critical energy infrastructure hub (CEI Hub) covers a six-mile stretch on the lower Willamette River between the southern tip of Sauvie Island and the Fremont Bridge on U.S. Highway 30. This relatively small area in Portland is the site of liquid fuel, natural gas, and electrical infrastructure and facilities; it is also an area with significant seismic hazard. The energy sector facilities in the CEI Hub include:
• All of Oregon’s major liquid fuel port terminals.
• Liquid fuel transmission pipelines and transfer stations.
• Natural gas transmission pipelines.
• A liquefied natural gas storage facility.
• High voltage electric substations and transmission lines.
• Electrical substations for local distribution.
More than 90 percent of Oregon’s refined petroleum products come from the Puget Sound area of Washington State. Oregon imports the liquid fuel by pipeline and marine vessels; it passes through the CEI Hub before it is distributed throughout Oregon to the end users. (One large consumer is the Portland International Airport.) In addition, a portion of the state’s natural gas fuel supply passes through the CEI Hub; and a high voltage electrical transmission corridor both crosses the area and supplies power to it. pg180
The liquid fuel pipeline was largely constructed in the 1960s when the regional seismic hazards were unknown and state-of-practice construction techniques did not include any reference to seismic standards. The regional seismic hazards are now known to be significant, and the soils at the river crossings are known to be susceptible to liquefaction and lateral spreading. The 1960s vintage pipeline design did not consider ground movements from lateral spreading at river crossings or other earthquake-induced stresses on the pipelines that may cause damage and multiple breaks. A break in the pipe would have a significant impact on all of the petrochemical facilities in the CEI Hub and could result in a statewide fuel shortage.pg184 Continue reading →
