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ERF1-2 -- Enhanced River Reach File 2.0
Entry ID: USGS_erfi-2

Abstract: This report describes the process of enhancements to the stream reach network,
ERF1, which is an enhanced version of EPA's RF1. The U.S. Environmental
Protection Agency's reach file (RF1) is a database of interconnected stream
segments or "reaches" that comprise the surface water drainage system for the
United States. A variety of attributes have been assigned to each reach in
support of spatial ... View entire text
Related URL
Description: Title: USEPA Reach File Version 1.0 (RF1) for the Conterminous
United States (CONUS)
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Geographic Coverage
Spatial coordinates   
  N: 48.19   S: 23.24   E: -65.38   W: -127.86

Data Set Citation
Dataset Originator/Creator: Jacqueline V. Nolan, John W. Brakebill, Richard B. Alexander and Gregory E. Schwarz
Dataset Title: ERF1-2 -- Enhanced River Reach File 2.0
Dataset Release Date: 2002-02-22
Dataset Release Place: Reston, Virginia
Dataset Publisher: U.S. Geological Survey
Version: 2.0, November 19, 2001
Data Presentation Form: map
Other Citation Details: USGS Open-File Report
Online Resource:
Temporal Coverage
Start Date: 1999-01-07
Stop Date: 1999-01-07
Data Resolution
Latitude Resolution: 459.9360656738
Longitude Resolution: 459.9360656738
Access Constraints None
Use Constraints The version of RF1 used to compile ERF1-2 was an early edition of a USGS RF1
translation and was updated by USEPA (USEPA, 1996). The capabilities of the
enhanced version of RF1 (ERF1-2) and the current USEPA version have not been
evaluated. The user is referred to the USEPA version for discussions of streamflow
accuracy and general background on the origin of RF1.
Originating Center
Data Center
Water Resources Maps and GIS Information, Water Resources Division, U.S. Geological Survey, U.S. Department of the Interior Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 703-648-4000;1-800-426-9000
Email: h2oteam at
Contact Address:
USGS National Center
Water Resources Division
12201 Sunrise Valley Drive
City: Reston
Province or State: VA
Postal Code: 20192-0002
Country: USA
Distribution Media: ftp
Distribution Format: ArcInfo export format
Fees: No fees
Phone: 706-648-5716
Email: jnolan at
Contact Address:
12201 Sunrise Valley Dr., MS 413
City: Reston
Province or State: VA
Postal Code: 20192
Country: USA
Extended Metadata Properties
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Creation and Review Dates
Last DIF Revision Date: 2017-08-23