Measure 10: Manage Diversions along Milk Ranch Conduit for Safety and Aesthetics
Any existing inactive diversion structures will be left in place and managed for safety and aesthetics by the Licensees. Six diversions along Milk Ranch Conduit (Current FERC Diversion Nos. 1, 4, 5, 6, 7, and 8 identified in Figure 1 and Table1 below) and the ancillary features are to be left inoperable (i.e., no longer divert flows). Licensees shall seal any exposed intake and diversion pipe openings at the inoperable diversions. Other specific actions include:
· FERC Diversion No. 5 – Licensees shall monitor the existing diversion structure following wet water years for undermining and collapse. If the diversion structure collapses, Licensees shall consult with Forest Service for appropriate mitigation actions.
· FERC Diversion Nos. 1 and 7 – Within six months of license issuance, Licensees, in consultation with the Forest Service and other interested resource agencies, shall develop an approach to modify or conceal the face of the diversion dam to create a more natural appearance. Methods such as chipping the concrete, modifying the flow pattern over the crest of the dam, and/or planting vegetation will be considered.
· FERC Diversion No. 8 – Licensees shall remove the exposed diversion pipe and seal the opening.
At all active and inactive diversion locations, Licensees shall remove construction litter and/or diversion debris not protected by the HPMP. Licensees shall screen and maintain air vents in order to prevent wildlife from entering the vents.
Figure 1. Milk Ranch Conduit Diversions
Table PM&E-10-1. Milk Ranch Conduit Diversions Status and Locations, 2017
Diversion No. (current) / Diversion No.(proposed) / Stream Drainage / Diversion Status / Road Mile (0.0 near MRC outfall) / UTM (10S) a /
Easting / Northing /
1 / ‐‐ / ‐‐ / Inactive / 0.0 / 651398 / 4418798
2 / 9 / ‐‐ / Active / 0.9 / 651313 / 4419738
3 / 8 / Bear Ravine / Active / 1.1 / 651633 / 4419902
4 / ‐‐ / ‐‐ / Inactive / -- / 651377 / 4420560
5 / ‐‐ / ‐‐ / Inactive / 1.6 / 651364 / 4420593
6 / ‐‐ / ‐‐ / Inactive / 1.9 / 651098 / 4420817
7 / ‐‐ / ‐‐ / Inactive / 1.9 / 651049 / 4420823
8 / ‐‐ / ‐‐ / Inactive / 2.0 / 650856 / 4420850
9 / 7 / Slide Ravine / Active / 2.6 / 650294 / 4421100
10 / 6 / Bear Trap Creek / Active / 3.1 / 649900 / 4421474
11 / 5 / ‐‐ / Active / 5.1 / 649591 / 4423096
12/13 / 4 / ‐‐ / Active / 5.4 / 649931 / 4423444
14 / 3 / South Fork Grouse Hollow Creek / Active / 6.7 / 650493 / 4424947
15 / 2 / North Fork Grouse Hollow Creek / Active / 6.9 / 650582 / 4425208
Milk Ranch Creek / 1 / Milk Ranch Creek / Active / 7.5 / 651220 / 4425622
a NAD83 UTM Z10N
Page 1 November 2017