![]() All related data (flood levels, impacts, historical crests) were updated to reflect datum change. Geological Survey (USGS) Data and Site Info for Corvallisĭatum was changed by 10 FEET in 2010. Older USGS topographic maps, MSL benchmarks Older USGS topographic maps, NGVD29 benchmarks Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps The BFE s the computed elevation to which flood waters are anticipated to rise during the base (1-percent-annual-chance) flood event. into MapInfo with the use of Digital Raster Graphic (DRG) base maps. the river is at bankfull level and may spill out of its banks at some locations between Harrisburg and Albany. The river is at bankfull level and may spill out of its banks at some locations between Harrisburg and Albany. Download scientific diagram Slope map of the Corvallis-Philomath Urban Growth. expect flooding of some river island access roads and secondary roads east of Corvallis. Flooding of low areas of Hwy 34 and numerous roads in and near Corvallis begins.Įxpect flooding of some river island access roads and secondary roads east of Corvallis. At this and higher stages, the Willamette River between Harrisburg and Corvallis has historically been up to 3 miles wide.Įxpect flooding of low spots of Hwy 99 south of Corvallis, the Corvallis-Albany Hwy, and Hwy 34 near Corvallis.Įxpect extensive flooding of low-lying agricultural land east and south of Corvallis. If you notice any errors in the below information, please contact our WebmasterĮxpect widespread flooding, with serious flooding possible between Corvallis and Albany on the west bank of the river. Is the approximate location based on the latitude/longitude coordinates An inspection cannot be conducted until the FLD permit is approved.Latitude/Longitude Disclaimer: The gauge location shown in the above map If applicable, you must obtain a Floodplain Development Permit. ![]() A licensed surveyor may be required to conduct a site survey and complete an elevation certificate that gets submitted to the City.Īs an aside, if you currently obtain plumbing, mechanical or electrical permits online through the state's e-permitting system, obtaining a permit online for these specialty disciplines does not eliminate the obligation to verify the status of the100-yr Floodplain as it relates to your project site. The BFE is shown on the Flood Insurance Rate Map (FIRM) for zones AE, AH, A1A30, AR, AR/A, AR/AE, AR/A1 A30, AR/AH, AR/AO, V1V30 and VE. This includes "in kind" or "like-for-like" replacement of mechanical units. Check Application Status Base Flood Elevation (BFE) The elevation of surface water resulting from a flood that has a 1 chance of equaling or exceeding that level in any given year. All work within the floodplain requires the new work to be constructed to floodplain design standards, including elevating to the design flood elevation. It is important to note that a Floodplain Development Permit is not just required for building permits, but also electrical, plumbing, mechanical, and excavation work being conducted within the 100-yr Floodplain. FEMA requires the City to issue this FLD permit and there is no fee associated with it. This permit will be reviewed concurrent with your other application or as a stand-alone application if the activity does not require an additional permit. The Floodplain Development Permit will require a separate permit application. Responsible construction saves lives.Ī Floodplain Development Permit (FLD) is required for any work conducted within the 100-yr Floodplain boundary. When developing or building within a natural hazard areas, it is important to take precautions and build in compliance with local codes, building codes, and FEMA regulations in order to protect your investment and your life.
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