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To accomplish the objectives laid out in the Summary, several products were developed: Stream Centerline with Route Index This product consists of line geometries that were digitized from a combination of data sources. The principle source was an intensity raster produced from LiDAR data collected by Watershed Sciences, Inc., in Feb. 2008. The secondary source was a vector contour set from the contractor-delivered elevation model, which was used to determine the lowest elevations associated with the mapped channel boundary. The river centerline adhered to these two inputs to maintain internal consistency with the LiDAR point cloud.Two center lines were developed; one describes the main stem Shasta River while the other includes the [...]

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This analysis was completed around Jan. 2012 for the Shasta River and one of its tributaries, Big Springs Creek. The purpose of this analysis is to help restoration practitioners identify areas that are most suitable for willow tree plantings, which provide numerous benefits to riparian areas, including shade, stream cooling, and bank stability. This analysis is comprised of several models. First, the Relative Elevation Surface Model was developed to create a DEM that is normalized to the elevation of the surface water in the immediate vicinity. In other words, a river is always running downhill, so the elevation of the surface water is always decreasing as you move downstream. This first model essentially flattens out the river, and uses those small incremental changes in elevation to normalize the adjacent bank elevations, so that a given point at one location on the stream bank can be directly compared to a point at a different location downstream. The Relative Elevation Surface Model was then used to develop a Willow Planting Suitability Model, which categorizes each pixel of stream bank along the waterways as suitable, marginal, or unsuitable for willow survival, depending on the elevation of the bank relative to the water surface. Finally, a Solar Loading Model was developed to indicate which portions of the waterways were exposed to the most sun on the summer solstice (i.e. the longest day of the year). In other words, the model identifies areas that have the least riparian vegetation that would otherwise provide shade to the water surface for at least part of the day. This can be used to identify areas along the stream where the shade from newly-planted willow trees would provide maximum benefit in terms of stream cooling. Thus, we identify where willow trees are most likely to survive, and where they are needed the most to support water temperature reduction. The intersection of these models can be used to identify the highest priority planting areas based on this logic.


The Fish and Wildlife Service shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics (e.g., GIF or JPG format files) are not legal documents and are not intended to be used as such. The information contained in these data may be dynamic and could change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data; it is not appropriate to use the related graphics as data. The Fish and Wildlife Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data be directly acquired from an authorized Fish and Wildlife Service source and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on computer systems at the Fish and Wildlife Service or through cooperators/contractors, no warranty expressed or implied is made regarding the utility of the data on other systems for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.
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Spatial Services

ArcGIS Mapping Service


  • Pacific Southwest Region, Region 8
  • U.S. Fish and Wildlife Service

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Data source
Input directly

Additional Information

ArcGIS Service Definition Extension

dateUploadedThu Feb 26 16:26:01 MST 2015
dateUploadedThu Feb 26 16:26:05 MST 2015

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