This dataset comprises Unusually Sensitive Areas (USAs) data for drinking water resources in the state of Nevada. Complex polygons in this dataset represent locations of USAs for drinking water resources. In accordance with pipeline safety laws (49 U.S.C. Section 60109), the Pipeline and Hazardous Materials Safety Administration (PHMSA) is required to identify areas unusually sensitive to environmental damage in the event of a hazardous liquid pipeline accident. Through interactions with various regulatory agencies, pipeline operators, private contractors, and the general public, a process has been developed and adopted by PHMSA to identify USAs for drinking water resources (refer to the Final Rule in 49CFR Part 195). The process consists of identifying potentially sensitive public water systems (PWS), specifically surface water intakes and groundwater wells, and subjecting them to the appropriate filter criteria. For additional information about drinking water USAs, refer to the comprehensive state report "Unusually Sensitive Areas for Drinking Water Resources: Report for Nevada," and to "Unusually Sensitive Areas Drinking Water GIS Methodology Report" which are citied in the Cross Reference section.
The Pipeline and Hazardous Materials Safety Administration (PHMSA) of the U.S. Department of Transportation is required to identify Unusually Sensitive Areas (USAs) in accordance with the pipeline safety laws (49 U.S.C. Section 60109). Pipeline operators conducting risk assessments can use drinking water USAs, in conjunction with their pipeline information, to identify areas that may suffer long-term and permanent environmental/resource damage in the event of a hazardous liquid pipeline accident. USAs were developed to assist pipeline operators in identifying the segments of their pipeline subject to the Pipeline and Hazardous Materials Safety Administration (PHMSA) Integrity Management Rulemaking. Users of these data are encouraged to read carefully the technical reports cited in the Cross Reference section, so they understand the limitations of the drinking water USA data.
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These constraints will be supplied by the U. S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration upon receipt of request for the data.
1200 New Jersey Ave. SE
This project was funded by the U. S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration. At Research Planning, Inc. (RPI), a team of Geologists, GIS Analysts, GIS Specialists and Database Specialists collected, complied, and edited the Drinking Water USA data. A team of GIS Programmers at RPI wrote the Drinking Water Unusually Sensitive Areas model.
A multi-stage error checking process is used to verify both attribute accuracy and logical consistency throughout data production. The process includes a standardized data entry methodology, on-screen data review by in-house experts, a final Quality Assurance/Quality Control (QA/QC) process, and multiple automated and manual logical consistency checks. For a more detailed evaluation of source data attribute accuracy, contact the sources listed in the Lineage section.
A multi-stage error checking process, described in the above Attribute_Accuracy_Report, is used to verify both attribute accuracy and logical consistency throughout data production. This process includes multiple automated and manual logical consistency checks that test the files for missing or duplicate data, rules for proper coding, and GIS topological consistencies. A final review is made by the project manager, and the metadata and final reports are written.
These data represent a synthesis of expert knowledge, available digital data, and hardcopy reports and maps. For additional information refer to the "Unusually Sensitive Areas for Drinking Water Resources: Report for Nevada" and the "Unusually Sensitive Areas Drinking Water GIS Methodology Report" prepared by Research Planning, Inc. for the U. S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration.
The Drinking Water USA dataset was developed from pre-existing digital sources and reflects the positional accuracy of these original data. See the Lineage and Process_Description sections for more information on the original source data and how these data were integrated or manipulated to create the final dataset.
Hydrography data
Public water supply information
Surficial geology and aquifer information
The complete process of USA identification consists of multiple steps that can be separated into three general categories: 1. Data collection and pre-processing; 2. GIS application of filter criteria and identification of preliminary USAs; and 3. Selection of final USAs and integration of Adequate Alternatives Drinking Water information. For a complete description of the process, please refer to section three of "Unusually Sensitive Areas for Drinking Water Resources: Report for ***" and to the "Unusually Sensitive Areas Drinking Water GIS Methodology Report" which are cited in the Cross Reference section.
1121 Park St.
Metadata imported.
Metadata imported.
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Internal feature number.
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Feature geometry.
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Area of feature in internal units squared.
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Perimeter of feature in internal units.
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Internal feature number.
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User-defined feature number.
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NAME: Text containing the name of the sole source aquifer composed of karst that is considered a USA. In cases where no value is listed, there are no sole source aquifers that are composed of karst present in that polygon. SOURCE: Source that supplied public water suppy data.
1200 New Jersey Ave SE
I understand that any and all drinking water and ecological USA data/information obtained from the Pipeline and Hazardous Materials Safety Administration's (PHMSA's) National Pipeline Mapping System (NPMS) will be treated as DOT proprietary information. I agree to: restrict disclosure of and access to this data/information to persons with official state and local government responsibility; to not redistribute the data/information; and to refer requests by other persons for such information to PHMSA. I also agree to maintain a list of those persons that have been provided access to this information.
To request USA data, please e-mail the following information to NPMS-NR@mbakercorp.com: First Name; Last Name; Middle Initial; Title; Pipeline Operator Name; PHMSA Operator ID; Street Address; City; State; ZIP Code; Phone; Fax; Email; Type of USA Requested (Ecological or Drinking Water); States Requested.
1121 Park St