Specifications include, but are not limited to: The City is preparing to release a bid package that will include a sewer line and casing installation underneath a
roadway and a water vault. The project contains challenging construction conditions due to geologic conditions
and proximity of critical existing infrastructure. The contractor's prequalification is for construction of 280
linear feet of 27” sewer pipe (at 0.12% Slope), approx. 200 linear feet of 48” steel casing installed by hand
tunneling and casing advancement, trench stabilization, bedding, import backfill, testing, and appurtenances.
See Plan and Profile attachment. Construction depths of the sewer line are anticipated to be between 15-25 feet
through cobbles, boulders, and moderately cemented soil conditions. Special consideration will be given to
general contractors who have experience with trench stabilization, hand tunneling and casing advancement
installation, flat grade sewer installation, and deep bury depth sewer installation.