LD3-Miter-Gate-Post-Alision-Repairs_Pics_Drawings.pdf

Photo 1 – Overview of LD3 Upstream, Landside Miter Gate, Downstream Side

Photo 2 – Diagonal Tension Tie that is detensioned.

The failure point is below water and not visible.

Photo 3 – Bent vertical I‐beams and gusset plates.

b6ecsas5 Polygon b6ecsas5 Polygon b6ecsas5 Polygon b6ecsas5 Polygon b6ecsas5 Callout Area damaged by vessel allision b6ecsas5 Line b6ecsas5 Line b6ecsas5 Callout Heat straighten bent vertical beams and girders.

heat straighten vertical I-beams = (5) each heat straighten vertical girders = (2) each heat straighten top horizontal girder = (1) each heat straighten gusset plates = (2) each b6ecsas5 Callout Work to be performed by USACE staff:

Remove timbers to provide access to heat straightening Contractor.

Provide "and operate "handy-flat" boat to provide access to the heat straightening Contractor.

Re-tension diagonal members.

Replace damaged existing rivets with new high-strength bolts.

Paint steel in areas damaged by impact or heat.

Install new timbers.