Updated_Description_of_Work_information.pdf

(a) Description of Work.

This work consists of removal and disposal of the Eagle Creek suspension Bridge and excluding railing adjacent to approaches. Furnish all labor, equipment, supplies, supervision, and transportation necessary to perform this contract. The bridge is a wire cable suspension bridge with steel suspenders attached to treated timber elements such as Needle Beams, Stringers, Deck and Railing. The Bridge partially collapsed in September of 2017 and was further damaged by a storm event mid-October, 2017.

The bridge was reconstructed in 1997 with Plans R34601-ALL attached for reference. Also included are photos of similar demolition by mobile crane removal from 1997 as well as 2017 photos of recent condition.

The upstream cable has failed near the northeast anchor block. The other main suspension cable remains suspending most of the failed structure but its condition and structural capacity is unknown.

The northeast tower has rotated off 2 of the 3 pedestal supports and is unstable. All concrete foundations and anchor assemblies are to remain in place except for salvage of a single anchor assembly. All suspension cables, suspenders, hardware and pressure treated wood elements are to be removed and disposed of off National Forest System Lands.

Disassemble and remove in a manner that does not alter flowing water or scarify the stream channel, gravel bars, banks or flood plain. Machinery and debris shall not be allowed in the active stream. Use of the gravel bar for staging and by machinery is allowed if not covered in water. Any vegetation cleared from gravel bar to facilitate operations is to be slash piled in an area above the high water mark and approved by the CO. Likely east of the southwest tower location.

(e) Period of Performance.

Full contract performance time from the Notice to Proceed to final inspection is estimated to be no more than 15 30 days.

SALVAGING MATERIAL.

Salvage with reasonable care the following: All signs attached to items to be removed and one top rail with length of 5 feet and (3) side Railing lengths of 5 foot each including fastening hardware.

Railing shall be free of visible distress or deformation for use as barricade railing as indicated in the amendment attachment ‘Rail’. the anchor assembly of the Northeast anchor block intact with the

(2) 1-3/8”anchor rods with (8) nuts, plate, spelter block attached to failed cable with an approximate length of 2 ft.. Cables to be removed with spelter block or may be cut 6” below ground level. If spelter block is removed, replace all nuts on 1-3/8” anchor rods. Nuts of embedded 1-5/8” anchor rod to remain installed at completion of work. Reference CABLE ANCHOR detail on Sheet 6 of 6, R34601-ALL.

Stockpile salvaged material at a designated location in parking area near the project.