BRIDGE REPAIR/REHABILITATION FEASIBILITY STUDY

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PAGE 6 OF 7 CITY/TOWN B.I.N. BR. DEPT. NO. 8.-STRUCTURE NO. INSPECTION DATE CHATHAM 437 C-07-001 C07001-437-MUN-NBI NOV 30, 2010 TIMBER PILE CONDITION CHARTS PILE 'A' PILE 'B' PILE 'C' PILE 'D' PILE 'E' PILE 'F' PILE 'G' PILE 'H' PILE 'I' PILE 'J' BENT #1 2 2 W 1 W 1* W W W W BENT #2 1 1 1* 1 W W 1 W 1 1* BENT #3 1 1 1* 1 2* 1 2 W 2 2* BENT #4 2 2 1* 1 1 1 W W 1 1* BENT #4A 1 1 1* --- --- --- --- 1 1 3 BENT #5 1 1 1 1 1* 1 1 --- --- --- BENT #6A 1 1 1 --- --- --- --- 1 1* 1 BAT 1* BAT 1* BAT 1* BAT 1* BENT #6 1 1 3 1 1 2 2 1 1 1 BAT 1* BAT 1 BENT #7A 1 1 1 1 1 1 1 --- --- --- CHANNEL BENT #8 1 1 1 1 3* 1 1 1 1* 1 BENT #9 2 1 1 1 1 2* 1 1 2 2 BAT 1 BAT 2 BAT 2* BAT 1 BAT 1* BAT 2* BENT #10 1 1 1 1 1 1 1 1 1 1 BENT #11 2* 1 1* 1* 1* 1* 1* 1 1 1 Chart 2: TIMBER PILE CONDITION (See Pg 7 for pile descriptions) REM.(2)7-96
PAGE 7 OF 7 CITY/TOWN B.I.N. BR. DEPT. NO. 8.-STRUCTURE NO. INSPECTION DATE CHATHAM 437 C-07-001 C07001-437-MUN-NBI NOV 30, 2010 CHARTS General Notes: 1. Bents are numbered from right to left, looking downstream. 2. Piles are lettered from upstream to downstream. 3. Batter piles (BAT) are next to adjacent vertical pi 4. Evidence of marine borer activity in the pile is indicated by (*). 5. Pile previously wrapped in plastic is indicated by (W). 6. General Condition of Piles: 1. Minor checks (
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BRIDGE REPAIR/REHABILITATION FEASIB
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1.0 EXECUTIVE SUMMARY The existing
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such there is a risk that the proje
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3.0 BRIDGE DESCRIPTION Bridge Numbe
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Photo 2 - Present Mitchell River Br
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4.0 ELEMENT CONDITION & REHABILITAT
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Based on the 1997 load rating analy
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promotes growth in the number and s
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4.2.2 Deck NBIS Condition Rating: 5
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Rehabilitation Scope: In order to m
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4.2.5 Railings NBIS Condition Ratin
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Functionality and Safety: Eliminati
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Although in-place preservative trea
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The bascule span timber stringers c
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Repair Scope: Although the timber m
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Use of an all steel counterweight w
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additional force effects, the speci
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typically loose. The steel guardrai
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Functionality and Safety: The cap b
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The surface decay and deterioration
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the interior of the piles where the
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Load Capacity: The current loss in
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Visual Impacts: Replacement of the
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Condition Description: There are cu
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5.0 OTHER CONSIDERATIONS 5.1 Naviga
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SUMMARY OF TIMBER ELEMENT SERVICE L
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5.3 Funding The project is currentl
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navigation opening. The estimated c
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• Continued replacement, repair a
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APPENDICES A. Existing Bridge Plans
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APPENDIX B Structures Field Inspect
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APPENDIX C Load Rating Summary (199
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MAINTENANCE AND REHABILITATION OF T
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Figure 14-1. - Many covered bridges
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(discussed later in this chapter),
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Figure 14-5. - Liquid wood preserva
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wood, and other openings to the atm
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Table 14-1. - Number and size of ho
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member noting treatment information
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Figure 14-11. - Splicing and scabbi
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STRESS LAMINATING Stress laminating
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ond between separated sections, inc
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onding the old and new pile section
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GENERAL PROCEDURES FOR EPOXY REPAIR
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openings will allow epoxy to escape
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Another quality control problem is
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6. Avent, R.R. 1985. Factors affect
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Integrated Remedial Protection of W
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Figure l-Effect of fumigant applica
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Table 1- Residual MITC content in D
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of reinvasion (Forsyth and Morrell,
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might represent the best option, wh
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In: Ritter, M.A.; Duwadi, S.R.; Lee
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Present and Potential Commercial Ti
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2 U.S. DEPT. OF AGRICULTURE HANDBOO
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10 U.S. DEPT. OF AGRICULTURE HANDBO
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APPENDIX F FRP Pile Jackets
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about its hazard to human health. T
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Fig. 5. Cross section of wood pile
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(Lopez-Anido et al. 2004c). For exa
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Table 1. Cost Items for FRP Composi
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Hardcore Composites. (2000). Hardsh
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CALCULATION COVER SHEET Project Nam
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URS Corp. 260 Franklin Street Bosto
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APPENDIX I Correspondence
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