BRIDGE REPAIR/REHABILITATION FEASIBILITY STUDY
Bridge Repair_Rehabilitation Feasibility Study - Town to Chatham
Bridge Repair_Rehabilitation Feasibility Study - Town to Chatham
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Condition Description: There are currently no reported scour concerns and the NBIS Scour<br />
Rating considers the bridge “Stable for Assessed Scour Conditions”.<br />
Repair Scope: None required.<br />
Rehabilitation Scope: None required.<br />
Functionality and Safety: The waterway bottom surface does not affect the functionality and<br />
safety of the bridge.<br />
Load Capacity: The predicted local pier scour during a major storm event for the pile bents is<br />
approximately 4 feet, which will reduce the axial load carrying capacity and lateral stability. The<br />
foundation capacity of many of the piles is unknown as there are no pile driving records<br />
indicating the depth to which the piles were installed or the driving resistance that was achieved.<br />
Although it is likely that the piles were driven to dense sandy glacial till material found 40 to 50<br />
feet below the river bed, this cannot be confirmed. Although there is no reported significant<br />
settlement or loss in stability, the factors of safety for both axial capacity and lateral stability are<br />
unknown.<br />
Maintenance: There are no reported maintenance concerns with the current waterway bottom<br />
surface and no proposed changes that would affect the maintenance.<br />
Visual Impacts: There are no proposed changes that would introduce a visual impact.<br />
4.6 Traffic Safety<br />
4.6.1 Curb/Bridge Railing<br />
NBIS Condition Rating: 5 (Fair)<br />
Condition Description: See 4.2.4 and 4.2.5 above.<br />
Repair Scope: See 4.2.4 and 4.2.5 above.<br />
Rehabilitation Scope: See 4.2.4 and 4.2.5 above.<br />
Functionality and Safety: See 4.2.4 and 4.2.5 above.<br />
Load Capacity: See 4.2.4 and 4.2.5 above.<br />
Maintenance: See 4.2.4 and 4.2.5 above.<br />
Visual Impacts: See 4.2.4 and 4.2.5 above.<br />
Repair/Rehab. Feasibility Study March 10, 2011<br />
Bridge No. C-07-001 (437) 46 Final Report