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Federal government websites always use a .gov or .mil domain. Before sharing sensitive information online, make sure you're on a .gov or .mil site by inspecting your browser's address (or "location") bar.

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This site is protected by a Secure Sockets Layer (SSL) Certificate authorized through the United States Government. The https:// means all transmitted data is encrypted - in other words, any information or browsing history that you provide is transmitted securely.



Many of the trademarks displayed on the website, including the Department of the Interior seal and the Office of Natural Resources Revenue logo, are the property of the U.S. Department of the Interior or the Office of Natural Resources Revenue. Nothing contained in this website should be construed as granting, by implication or otherwise, any license or right to use any Trademarks displayed on the website without the express written permission of the Department of the Interior or the Office of Natural Resources Revenue. Any unauthorized use of the Trademarks on this website is strictly prohibited.

Data and Information

While ONRR makes every effort to provide accurate and complete information, various information and data points are subject to change. We strongly recommend that data and information be acquired directly from ONRR. In addition, some of the documents may contain live references (or pointers) to information created and maintained by other organizations; ONRR cannot control nor guarantee the relevance, timeliness, or accuracy of these outside materials. ONRR welcomes suggestions on how to improve our web pages and correct errors or incomplete information.

Site Security

For site security purposes and to ensure that this service remains available to all users, this government computer system employs software programs to monitor network traffic to identify unauthorized attempts to upload or change information, or otherwise cause damage. Unauthorized attempts to upload information or change information on this website are strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986 and the National Information Infrastructure Protection Act. Information may also be used for authorized law enforcement investigations.

Data and information presented on this website is considered public information and may be distributed or copied if it contains the appropriate citation and photo/image credit. However, the ONRR Logo is for the official use of the Office of Natural Resources Revenue and not for the use of the private sector.  Written authorization for the use of the ONRR Logo may be obtained by contacting ONRR Public Affairs.