Thor bridge project hits unforeseen sewer elevation; county plans change order covered by STBG funds
Work on the Thor bridge replacement uncovered a sewer flow line higher than the creek flowline; county staff and the city's engineer plan an extra work order (~$15,000) to sleeve the sewer through the new box culvert, using remaining STBG funding so the city and county should not incur additional costs.
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County staff told the board that during the Thor bridge replacement (STBG-funded) they discovered the gravity sewer flow line was about 1.5 feet higher than the creek’s flowline and that a prior contractor had not reached the proper depth during earlier ditch cleaning. "The flow line of the gravity fed sewer is 11191. So it's a foot and a half higher than the flow line of the creek," staff said, explaining why an extra work order would be required.
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