Attachment_C_Mile_5.5_Erosion_Control_Maps_and_Photos.pdf

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Reduce erosion near Stehekin, North Cascades NP WA
Solicitation number
140P8319Q0078
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Attachment C Mile 5.5 Erosion Control Maps and Photos

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140P8319Q0078: Stehekin Road Mile 4, 5.5 and 8 Erosion and Drainage Improvements Attachment C: Mile 5.5 Erosion Control Maps and Photos

North Cascades NPS Complex maps.google.com

Stehekin vicinity map

Stehekin maps.google.com

Mile 5.5 Erosion Control Location and Pictures

The road section for the two rock bars are located in Stehekin, Washington, at the north end of Lake Chelan. The site is remote, and there is no road access to Stehekin, though there are roads within Stehekin Valley. The location of mile 5.5 erosion control and bank stabilization is located

5.5 miles from Stehekin landing along Stehekin Road and about 1 mile after passing Harlequin Bridge. Note that the work is along Stehekin road and not across Harlequin Bridge.

Figure 1: Overhead View of Erosion Site Location.

140P8319Q00##: Stehekin Road Mile 9.2 Culvert Installation and Drainage Improvements

Figure 2: Erosion Site for Rock Barb

Figure 3: Erosion Site for Rock Bar Closer View

Figure 4: Erosion Site for Rock bar Upstream View

Figure 4: Cross Section Detail Existing Conditions

Figure 5: Cross Section Detail Proposed Treatment

Figure 6: Overhead View of Desired Result

Figure 7: Rock Bar Specifications

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