What is the difference between PIMMA and the Public Map Viewer?

The NPMS website contains two web map viewers designed to assist government officials and the general public with displaying and querying pipeline data.

PIMMA

The National Pipeline Mapping System (NPMS) Pipeline Information Management and Mapping Application (PIMMA) is a web-based mapping application designed to assist federal, state and local government officials and pipeline operators with displaying and querying data related to:

  • gas transmission and hazardous liquid pipelines,
  • liquefied natural gas plants, and
  • breakout tanks

under Department of Transportation (DOT) Pipeline and Hazardous Materials Safety Administration (PHMSA) jurisdiction. Please note that this application does not contain distribution or gas gathering pipelines.

PIMMA is a password-protected application. Access to NPMS data is limited by the type of user you are. Pipeline operators may only view their submitted data. County and local government officials are limited to their county. State government officials are limited to their state. Federal government official users may view the entire dataset. Usernames and passwords are assigned to a single user and must be kept confidential. PIMMA logins cannot be shared among coworkers. No contractors may be issued a personal username or password. If a written confidentiality agreement exists, a password may be shared with an account holder’s contractor.

All information obtained and all maps produced from PIMMA are for official use only and must be treated as DOT proprietary information. Only NPMS staff have the right to redistribute maps or information from the NPMS.

NPMS Public Map Viewer

The National Pipeline Mapping System (NPMS) Public Map Viewer is a web-based mapping application designed to assist the general public with displaying and querying data related to:

  • gas transmission and hazardous liquid pipelines,
  • liquefied natural gas plants, and
  • breakout tanks

under Department of Transportation (DOT) Pipeline and Hazardous Materials Safety Administration (PHMSA) jurisdiction. Please note that this application does not contain distribution or gas gathering pipelines.

Within the Public Map Viewer, the user may have access to the NPMS data for one county at a time. Information obtained and maps produced from the Public Map Viewer are for general information only and may be re-distributed as needed. In accordance with PHMSA’s security policy, the scale in which the user may zoom into NPMS data is restricted. The user may zoom into the NPMS data at the map scale of 1:24,000.