Amendment_002_Corrected_Treatment_Area_14.pdf

Erosion Control Treatments for Site 14

3.1.1 Erosion Control Work for Site 14 – Graham Harbor Campground

This site is Graham Harbor Campground and dock. It is 100 feet long with a wood wall protecting the site. The wall consists of four log courses with the bottom course approximately

8- 12 inches above the 1,100-foot high water line. The wall has a wood boardwalk along the top for pedestrian use.

At site 14 approximately 83 lineal feet will be treated with T3S Modified – Single Row

Rock Placement. There will be no LWD because rock can be placed directly on the flat shoreline without any ground disturbance. This treatment will inhibit materials being washed out underneath the bottom log course as the rock will block wave action especially when lake levels are nearly equal to the bottom elevation of this wall.

Work at Site 14 will need to be done from the barge due to potential lithic scatter being present.

No ground disturbance will be allowed at this site and equipment will not be allowed to operate on dry shoreline. Mobilization cost should include all barge work the contractor anticipates.

Due to the limited and simple nature of this site a shoreline profile or site sketch was unnecessary to determine treatments for this site. Treatment zones are identified in the photos for this site.

Table 1: Treatments for Site 14 – Graham Harbor Campground

Treatment

Zone

Length

(Feet)

Treatment Type

(See Drawings)

Treatment Description

A 37 T3S Single Row Rock Placement. No LWD.

B 46 T3S Single Row Rock Placement. No LWD.