| Area |
Upper Big River |
| Topic |
Sediment: Matthews Road Construction by Period Upper Basin 1921-2000 |
Click on image to enlarge (98K). Click here to display a larger version (180K).This image, from Matthews and Associates (2001) Appendix B-1, shows roads and construction period in the Headwaters Big River Planning Watershed. The Headwaters Planning Watershed is also the Upper Big River CalWater sub-basin. This Planning Watershed has a road density of 7.13 mi/sq mi, exceeding the properly functioning condition set by the National Marine Fisheries Service (1996), which is less than 3 mi/sq mi.
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Click on image to enlarge (98K). Click here to display a larger version (180K).