State of Tennessee
Department of Transportation
P.O. Box 429
Jackson, Tennessee 38301
May 8, 1987

Memorandum

To: Mr. Glenn A. Beckwith, Civil Engr. Mgr. 2, Design Office From: W.C. CRUMP, CIVIL ENGR. MGR. 1, SURVEY & DESIGN OFFICE Subject: Construction Cost Comparisons of Slip-Lining, Jacking, and Replacement as Alternatives to Repair/Replace Small Deteriorated Highway Pipe Culverts

Pursuant to your request, Mr. Glenn Harris of this office has investigated the subject cost alternatives for repairing/replacing small deteriorated highway pipe culverts. Because of past similar sized projects, a hypothetical project covering 40 miles of highway length and repairing/replacing 54 pipes each averaging 68' in length (for a two lane type roadway) and divided as 18 pipes of 18" diameter, 18 pipes of 24" diameter and 18 pipes of 36" diameter, was estimated for each of the three corrective alternatives. Also, where applicable, heights over pipes were assumed to be 1/3 of pipes at 15' fill. The summary results of calculating the estimated construction cost of the 3 alternatives are as follows (No E & C yet added).

» Alternate 1

Slip-lining inside existing pipes with "Plastic liners"    $232,160.00

» Alternate 2

"Jacking-in" replacement steel pipes    $869,175.00

» Alternate 3

"Cut & Cover" replacement with concrete pipe    $351,234.00*

*Notice, the $351,234.00 is misleading for it assumes the most optimum and unlikely conditions of no run-a-rounds and no one way signals.

WCC/sks
cc: Mr. J.L. Daniel, w/encl.
Mr. Glenn H. Harris, w/encl.