environmental assessment for the hog lake road improvement project
environmental assessment for the hog lake road improvement project
environmental assessment for the hog lake road improvement project
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Ramona Hog Lake Road Improvement Project August 2011<br />
those amounts were compared to <strong>the</strong> amount of erosion generated <strong>for</strong> Hog Lake<br />
Road as a paved <strong>road</strong> (condition after Proposed Action):<br />
An unpaved <strong>road</strong> 24’ wide at 94+77 to 84+77 yielded 1,155.63 lb of <strong>road</strong><br />
prism erosion and 679.96 lbs of sediment leaving buffer.<br />
At 84+77 to 74+77, an unpaved <strong>road</strong> 24’ wide yielded 1,386.99 lb of <strong>road</strong><br />
prism erosion and 850.06 lbs of sediment leaving buffer.<br />
At 74+77 to 64+77, an unpaved <strong>road</strong> 24’ wide yielded 1,397.17 lb of <strong>road</strong><br />
prism erosion and 852.71 lbs of sediment leaving buffer.<br />
At 64+77 to 54+77, an unpaved <strong>road</strong> 24’ wide yielded 1,544.53 lb of <strong>road</strong><br />
prism erosion and 950.69 lbs of sediment leaving buffer.<br />
At 54+77 to 44+77, an unpaved <strong>road</strong> 24’ wide yielded 1,397.17 lb of <strong>road</strong><br />
prism erosion and 852.71 lbs of sediment leaving buffer.<br />
At 44+77 to 34+77, an unpaved <strong>road</strong> 24’ wide yielded 1,559.57 lb of <strong>road</strong><br />
prism erosion and 954.76 lbs of sediment leaving buffer.<br />
At 24+77 to 14+77, an unpaved <strong>road</strong> 24’ wide yielded 1,096.78 lb of <strong>road</strong><br />
prism erosion and 612.56 lbs of sediment leaving buffer.<br />
At 14+77 to 4+77, an unpaved <strong>road</strong> 24’ wide yielded 372.92 lb of <strong>road</strong> prism<br />
erosion and 188.37 lbs of sediment leaving buffer.<br />
At all of <strong>the</strong> above locations, a paved <strong>road</strong> 24’ wide yielded 0 lb of <strong>road</strong> prism<br />
erosion and 0 lbs of sediment leaving buffer. Clearly, paving <strong>the</strong> <strong>road</strong> will greatly<br />
reduce <strong>the</strong> quantity of sediment entering Canyon Lake/Lake Elsinore (TMDL 303<br />
listed water bodies). Although runoff would increase erosion with a paved <strong>road</strong>, <strong>the</strong><br />
implementation of mitigation measures/design features should reduce <strong>the</strong> amount of<br />
erosion to a level that is less than significant.<br />
For <strong>the</strong> Proposed Action, <strong>the</strong> Project would reduce federal/ACOE jurisdictional area<br />
by an additional 4,288 sf (0.098 acres), and state/CDFG jurisdictional area by an<br />
additional 6,429 sf (0.148 acres); however, <strong>the</strong>se losses will be made up through <strong>the</strong><br />
purchase of at least 0.15 acres of approved mitigation bank credit.<br />
If <strong>the</strong> Proposed Action is implemented with mitigation measures / design criteria<br />
employed, impacts to jurisdictional drainages and Canyon <strong>lake</strong>/Lake Elsinore and<br />
downstream in <strong>the</strong> watershed if <strong>the</strong> Proposed Action was implemented would be<br />
reduced to being less than significant.<br />
Cumulative Effects<br />
Projects and general development within <strong>the</strong> Forest, District and <strong>the</strong> Riverside<br />
Extended Mountain Area Plan (REMAP) area outlined in <strong>the</strong> Riverside County<br />
Frank Springer & Associates, Inc. Page 76 of 79 Environmental Assessment
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