Final Environmental Impact Statement Rio de los Pinos Vegetation ...

Final Environmental Impact Statement Rio de los Pinos Vegetation Management Project
Figure 3.6-4 - Photo 3-Stream bed
UTM 366680/4104345
Figure 3.6-5 - Photo 4-Upstream
UTM 367704/4103761
The largest tributary in the analysis area trends southeast to northwest through the south-central
part of the analysis area. The upper part of this small perennial stream is shown in Photo 5/Figure
3.6-6 and has a riparian zone width of about 30 feet. A small tributary that forks to the west is
also perennial, with healthy sedge vegetation. This E-3 stream also lies within a wide, wet
riparian zone. Localized seepage zones with healthy riparian are present along slopes to the west
of this tributary. In lower reaches of this stream, the riparian/floodplain zone narrows and
sideslopes steepen. Stream type is A-2 type with coarse gravel. One example of existing old
roads impacting water quality is shown in Photo 6/Figure 3.6-7. Here an old wooden culvert is
present, but fill has been partially removed by stream flow.
Figure 3.6-6 - Photo 5-Upstream
UTM 367112/4103863
Figure 3.6-7 - Photo 6-Upstream
UTM 367623/4103192
In a lower gradient reach of this stream, a large sedge meadow is present (Photo 7/Figure 3.6-8).
Stream health is robust and type is E-3/2, with healthy sedge and stable banks. Just above FS
Road 118.2, this tributary is a B-3 stream type approximately 4 feet in width with riparian in
proper functioning condition.
Chapter 3 – Affected Environment & Environmental Consequences Page 3-17