General

The datasets contained in this report have been approved for release and publication by the USGS. Although these datasets have been subjected to rigorous review and are substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, they are released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from their authorized or unauthorized use.

Any use of trade names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Accessibility:

Section 508 and Accessibility at the USGS

The USGS is committed to and is making every possible effort to ensure that all electronic and information technology developed, procured, maintained, or used by the USGS is accessible to people with disabilities, including both employees and the customers we serve. If you cannot fully access the information on this DVD-ROM, please e-mail the contact person or group named in the contact information provided on this DVD-ROM, and they will help you. This may include providing the information to you in an alternate format.

For further information and to learn more about the regulations governing the accessibility of Federal electronic information products, visit the Section 508 Web pages listed below:

Section 508 home page - http://www.section508.gov/
Access Board - http://www.access-board.gov/508.htm
Web Accessibility Initiative (WAI) - http://www.w3.org/WAI/