| Area | Lower Big River |
| Topic | Sediment: Matthews Lower Big Sub-basin Road Construction 1921-2000 |
This image, from Matthews and Associates (2001) Appendix B-5, shows roads and construction period in the Lower Big River Planning Watershed. The Lower Big River Planning Watershed is the western portion of the Lower Big River CalWater sub-basin and also contains the Little North Fork CalWater sub-basin.. This Planning Watershed has a road density of 7.65 mi/sq mi, exceeding the properly functioning condition set by the National Marine Fisheries Service (1996), which is less than 3 mi/sq mi.
This image, from Matthews and Associates (2001) Appendix B-4, shows roads and construction period in the Middle Big River Planning Watershed. The Middle Big River Planning Watershed is the eastern portion of the Lower Big River CalWater sub-basin. This Planning Watershed has a road density of 8.64 mi/sq mi, which exceeds the properly functioning condition set by the National Marine Fisheries Service (1996), which is less than 3 mi/sq mi.
This image shows the location of the historical railroads in the Lower Big River sub-basin. The railroads were used to transport harvested timber between about 1885 and 1930. The railroad network show here is from Matthews and Associates (2001), Figure 34.
Click on image to enlarge (169K).
Click on image to enlarge (138K).
Click on image to enlarge (139K).
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