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by Dr. Robert J. Houghtalen, P.E.

by Dr. Robert J. Houghtalen, P.E. RANDOM INSPECTION OF PIPE ARCH CULVERTS IN CRAWFORD COUNTY (7/24/02). FAILED CULVERT (Large CMP Arch). The failed culvert was replaced by a 15.5 ft. round, CMP w/headwalls and wingwalls. Assorted pictures of the new culvert.

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by Dr. Robert J. Houghtalen, P.E.

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  1. by Dr. Robert J. Houghtalen, P.E. RANDOM INSPECTION OF PIPE ARCH CULVERTS IN CRAWFORD COUNTY(7/24/02)

  2. FAILED CULVERT (Large CMP Arch)

  3. The failed culvert was replaced by a 15.5 ft. round, CMP w/headwalls and wingwalls.

  4. Assorted pictures of the new culvert. Picture inside looking downstream Relative size of culvert. Downstream headwall and wingwalls.

  5. PURPOSE AND EXTENT OF INSPECTION • Purpose – The inspection was initiated to gain insight into the pipe arch culvert failure of August 7, 2000 in Crawford County that caused 3 deaths. • Extent – Three pipe arch culverts were chosen at random on county road 1150E just north of Robinson.

  6. Location of Inspected Culverts

  7. Inspected Culverts are CMP Arches Northern Culvert Middle Culvert Southern Culvert

  8. THE SOUTHERN CMP ARCH Upstream side of culvert. Note the scour hole on the south side and the debris build-up.

  9. THE SOUTHERN CMP ARCH Inside the entrance of the culvert. Note the abrasion holes, loss of annealing?, and rust.

  10. THE SOUTHERN CMP ARCH Upstream side of culvert on the north side. Riprap has been dumped into a scour hole.

  11. THE SOUTHERN CMP ARCH The entrance lip of the culvert. The lip is being undermined and corrosion is present.

  12. THE SOUTHERN CMP ARCH Outlet side of culvert. Size: 11.5’ wide by 7.5’ high. Note the rock reinforcement of the southern culvert sidewall.

  13. THE SOUTHERN CMP ARCH Close-up of the rock reinforcement. This has obviously been placed to help prevent culvert collapse.

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