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Boulder, CO 80302
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Boulder, CO 80306
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South Boulder Creek Flood Mitigation Planning Study - Home Page
In 1996, it was discovered that neighborhoods in east Boulder that were previously considered to be outside the floodplain were actually within the West Valley of the SBC floodplain. These neighborhoods include about 1,000 structures/homes that are located west of SBC and north of U.S. 36. As a result, an updated mapping study was initiated to more accurately identify the flood hazards associated with SBC. City staff and its consultants completed and submitted the updated mapping study results to the Federal Emergency Management Agency (FEMA). The study results are intended to replace the current regulatory mapping that is based on a 1986 United States Army Corps of Engineers (USACE) study. The study was completed with the support and cooperation of FEMA, Colorado Water Conservation Board and Boulder County. The city is already using the new maps to review, regulate and issue permits for all properties within the South Boulder Creek basin. FEMA intends to officially adopt the study in late 2011. The process of adopting the mapping study will coincide with the adoption of the Digital Flood Insurance Rate Maps (DFIRMs) for Boulder County. Assuming the study results are officially adopted by FEMA, there will be 700 structures (with a total of approximately 1,200 dwelling units) in the 100-year floodplain (Zone AE). Currently, there are approximately 460 structures (with approximately 500 total dwelling units) in the 100-year floodplain. Structures affected by the existing regulatory mapping are also affected under the new study results. Therefore, approximately 240 additional structures (with approximately 700 total dwelling units) will be impacted. The vast majority of these structures are located within existing developed areas of the city within the West Valley area. The latest information includes the Alternatives and the cost estimates for each alternative, which are available below.
South Boulder Creek Major Drainageway Plan Alternatives Analysis Report - New December 2010
Flood Mitigation Measures - List of alternatives and estimated costs. The city is now working on a planning study to develop and evaluate measures to reduce flood risk along South Boulder Creek (Project area map). The study will focus on flood mitigation within the city limits, north of U.S. Highway 36. Nine flood mitigation alternatives have been developed in addition to a Comparison of Conceptual Alternatives. Staff recommended that alternatives 1, 2, 3, 5 and 7 be considered as best alternatives to be further studied:
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Dec. 14, 2010 - Water Resources Advisory Board (WRAB) meeting Read the memo to WRAB for this meeting. At the Dec. 14 meeting, the WRAB motioned to move foward with four of the the five staff recommended options. Option 7 will not be further analyzed. Read an informational memorandum that was sent to City Council on Oct. 14, 2010 Sept. 2, 2010 - Public Meeting Utilities personnel provided a summary of work to date, including concepts for flood mitigation. March 3, 2010 Open House - This initial public meeting presented a summary of flood risks, the planning process and initial concepts for flood mitigation. Join us to learn more about the project and to provide input on how to reduce flood risks associated with South Boulder Creek. Meeting materials:
Use the South Boulder Creek Question/Comment form to contact city staff.
Last Updated on Friday, 14 January 2011 08:23 |
Alternatives Analysis Report