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Colorado (Hydrologic Regions 14 and 15)

The Colorado drainage area is composed of hydrologic regions 14 and 15.

The Colorado hydrologic regions are further divided into production units: 14 a and b and region 15 a and b.

NHDPlus Shapefile and DBF components are distributed by hydrologic region.

NHDPlus ESRI Grid components are distributed by production units.

For more information please see Region 14 Release Notes in DOC, PDF.

For more information please see Region 15 Release Notes in DOC, PDF.


Download instructions:

Right click on a file name in the table below and choose "save file to disk." 
(or)
Go to ftp.ftp.horizon-systems.com. Right click on a file and choose "save file to disk."
(or)
You may connect to the NHDPlus FTP site (ftp.ftp.horizon-systems.com) with an FTP client. FTP clients are generally faster than file transfer through a browser.

 Colorado

Filename Key
NHDPlusrrVnn_componentname.zip
where:
rr is the hydrologic region number
nn is the currently available version of the data
componentname describes the content of the zip file
File Description File Name (.zip***) Format
Region 14 , Version 01_01, Catchment Grid NHDPlus14V01_01_Catgrid ESRI Grid*
Region 14, Version 01_01, Catchment Shapefile NHDPlus14V01_01_Catshape Shapefile**
Region 14, Version 01_03, Catchment Flowline Attributes NHDPlus14V01_03_Cat_Flowline_Attr DBF****
Region 14, Version 01_02, Elevation Unit a NHDPlus14V01_02_Elev_Unit_a ESRI Grid
Region 14, Version 01_02, Elevation Unit b NHDPlus14V01_02_Elev_Unit_b ESRI Grid
Region 14, Version 01_02, Flow Accumulation and Flow Direction Unit a NHDPlusV1401_02_FAC_FDR_Unit_a ESRI Grid
Region 14, Version 01_02, Flow Accumulation and Flow Direction Unit b NHDPlus14V01_02_FAC_FDR_Unit_b ESRI Grid
Region 14, Version 01_01, National Hydrography Dataset NHDPlus14V01_03_NHD Shapefile and DBF
Region 14, Version 01_01, QAQC & Sinks Spreadsheet NHDPlus14V01_01_QAQC_Sinks Excel Spreadsheet
Region 14, Version 01_01, Stream Gage Event NHDPlus14V01_01_StreamGageEvent DBF
Region 15, Version 01_01, Catchment Grid NHDPlus15V01_01_Catgrid ESRI Grid
Region 15, Version 01_01, Catchment Shapefile NHDPlus15V01_01_Catshape Shapefile
Region 15, Version 01_03, Catchment Flowline Attributes NHDPlus15V01_03_Cat_Flowline_Attr DBF
Region 15, Version 01_02, Elevation Unit a NHDPlus15V01_02_Elev_Unit_a ESRI Grid
Region 15, Version 01_02, Elevation Unit b NHDPlus15V01_02_Elev_Unit_b ESRI Grid
Region 15, Version 01_02, Flow Accumulation and Flow Direction Unit a NHDPlus15V01_02_FAC_FDR_Unit_a ESRI Grid
Region 15, Version 01_02, Flow Accumulation and Flow Direction Unit b NHDPlus15V01_02_FAC_FDR_Unit_b ESRI Grid
Region 15, Version 01_01, National Hydrography Dataset NHDPlus15V01_03_NHD Shapefile and DBF
Region 15, Version 01_01, QAQC & Sinks Spreadsheet NHDPlus15V01_01_QAQC_Sinks Excel Spreadsheet
Region 15, Version 01_01, Stream GageEvent NHDPlus15V01_01_StreamGageEvent DBF

*An ESRI Grid is a proprietary format for a raster dataset that defines space as an array of equally sized cells arranged in rows and columns.  Each cell contains an attribute value and location coordinates. Unlike a vector structure, which stores coordinates explicitly, raster coordinates are contained in the ordering of the matrix. Groups of cells that share the same value represent the same type of geographic feature.

**A Shapefile is a published, but proprietary, data format from the Environmental Systems Research Institute, Inc. (ESRI).

***Zip is a common type of file compression.

****DBF

 
   
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