- Purpose of this assessment
- Methods used
- Maps of riparian roads limiting factors ratings
- Spreadsheet of riparian roads limiting factors ratings
Purpose
| The purpose of the materials presented here are to provide the watershed councils with one possible approach to rate riparian roads as limiting factors. At our meeting in July we offered to conduct this analysis at the scale of the project area. We offer the following materials for your use, but please note that using this material is optional. If you feel that you have an alternative approach to rating riparian roads as limiting factors then please feel free to use that approach. |
Methods
| The approach was to place a 100-foot buffer around all fish-bearing streams in the project area, and to identify the length of road within these 100-foot buffers. The length of road within the buffers was summed by sixth-field HUC, and divided by the total length of fish-bearing streams within the sixth-field HUC. This results in a summary of miles of riparian road per mile of fish-bearing stream. These values were then compared to the criteria to arrive at a rating (i.e., "adequate", "moderate", or "limiting") for the sixth-field HUC. |
| The Oregon Department of Forestry (ODF) Fish Presence and Stream Size data were used to identify fish-bearing (both anadromous and resident) streams. The ODF data set only shows streams as lines. For the larger rivers and estuary areas I placed a 100-foot buffer around the water body polygons from the National Hydrography Data Set. |
| The Bureau of Land Managment (BLM) Ground Transportation data coverages were used to represent the extent of roads within the project area. |
Maps
| Please click here to view a map of limiting factor ratings for each sixth-field HUC. Note that there is a separate rating using the sixth-field HUCs developed by the Mid-Coast Watershed Council. |
Spreadsheet
| Please click here to view a spreadsheet of limiting factor ratings for each sixth-field HUC. Note that there is a separate rating using the sixth-field HUCs developed by the Mid-Coast Watershed Council. |