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Welcome to the official site for FEMA's Great Lakes Coastal Flood Study, the comprehensive storm and wind study of the Great Lakes basin for the purpose of updating the coastal flood hazard information and Flood Insurance Rate Maps (FIRM) for Great Lakes coastal communities. Below you’ll find a list of the most recent meetings with their agendas, links to preliminary maps, and presentations. To the left you’ll find additional Great Lakes Coastal Flood Study content.

FEMA created this self-guided tutorial on coastal flood mapping that provides important information to coastal communities and their residents. FEMA’s “Coastal Hazards and Coastal Mapping: A Visual Guide” is a glossary of coastal mapping terms and a companion to the tutorial.

View all posts by lake: Lake Superior | Lake Michigan | Lake Huron | Lake St. Clair | Lake Erie | Lake Ontario

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Oblique Photo Viewer Now Available

Great Lakes Coastal Flood Study reminds you to check out the Oblique Photo Viewer created by the US Army Corp of Engineers for this Federal Inter-Agency Initiative. This online resource of high resolution oblique imagery is used by the technical contractors for shoreline analysis in the Flood Study and is a valuable resource for the public and others interested in coastal issues on the Great Lakes.

Note: This site is currently being moved to a new host and is temporarily inaccessible. This note will be removed when it is back up and running again.

Links to resources like the Oblique Photo Viewer above are posted on the Technical Resources page.

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Technical Resources Page Added to greatlakescoast.org

A new page has been added to the Great Lakes Coastal Flood Study website in the menu on the left called Technical Resources. The Technical Resources page contains links to data and reports of interest to engineers and other technical stakeholders interested in the Great Lakes Coastal Flood Study.

As of this posting, there is a link to high-resolution bathymetric and topographic LiDAR data on NOAA’s Coastal Services Center Digital Coast website. In June 2012, additional data links will go live, including the C-STORM wave and storm surge database (containing all the wind, wave, pressure, ice and water level data for the Great Lakes basin) and the Great Lakes Oblique Photo Viewer (containing all the coastal oblique photographs of the Great Lakes shoreline).

The Technical Resources page also currently houses links to U.S. Army Corps of Engineers reports relevant to the Great Lakes Coastal Flood Study, as well as a link to the FEMA Great Lakes Coastal Guidelines, Appendix D.3 Update at fema.gov, which includes information on the 60-day public comment process that starts today.

All stakeholders are invited to review and comment on this draft guidance. See FEMA’s webpage for e-mail address for submission of comments.

New Bathymetric Lidar for the Lake Superior Shoreline

Now available on the Digital Coast – 900 linear kilometers of bathymetric lidar for Lake Superior!

NOAA Lake Superior Lidar

Using funding from the EPA Great Lakes Restoration Initiative, NOAA Coastal Services Center worked with regional stakeholders, including state agencies, federal agencies, regional working groups, international management bodies, and tribes, to determine the priority areas for collection. The data set was contracted for collection by FUGRO LADS, and excellent communication between CSC and the contractor maximized the quality of the end product. This data set will be critical to the success of many restoration projects, modeling of lake level change, and any analysis that requires a seamless elevation surface above and below the water.

To access the data set, visit http://csc-s-maps-q.csc.noaa.gov/dataviewer/viewer.html?keyword=lidar or, for more information, contact Lindy Betzhold.

Comprehensive Elevation Inventory for the United States Now Available

News from NOAA Coastal Services Center:

Topographic and Bathymetric Data Inventory:

The first comprehensive inventory of elevation data sets for the nation is now available. NOAA and FEMA have worked together to inventory elevation data, both topographic and bathymetric, for all 50 states and Puerto Rico.

The NOAA inventory initially focused on coastal elevation data, and a partnership with FEMA allowed expansion to the interior of the country. The inventory’s data viewer provides

  • searching of the NOAA and FEMA inventories,
  • enhanced functionality to create data reports,
  • new zooming capabilities,
  • printable custom maps of elevation resources,
  • an innovative design for displaying information about data sets, including quality, and
  • direct links to the data source whenever available.

The inventories can be used not only to locate the data needed when developing elevation models, but also to discover where data gaps exist. The data sets and data quality information found in these inventories are critical components of efforts to address issues related to flooding, beach nourishment, and erosion.

NOAA Topobathy

The NOAA inventory includes both topographic and bathymetric data and covers many coastal areas of the nation. This inventory represents data sets found during an exhaustive search for elevation data and portrays a snapshot in time of the elevation resources for a region. The FEMA inventory includes topographic data and covers the entire nation, including Puerto Rico. This effort was conducted January through June 2010 to support FEMA’s internal planning. It focused primarily on large data sets available for an area rather than an all-inclusive collection.

The next steps for this project are to incorporate information verification done by U.S. Geological Survey liaisons and combine the inventories for a single look at elevation resources for the nation.

Explore the site at www.csc.noaa.gov/topobathy/ to find out what elevation data are available for your area, or contact Lindy Betzhold for more information.