August 30,2024, this project has not yet been awarded. A timeline for award has not yet been established. The purpose for this solicitation is to establish a thirty-six (36) month Indefinite Delivery/ Indefinite Quantity (ID/IQ) service agreement with two (2) one-year renewal options for Cured-in-Place Pipe (CIPP) and/or Cured-in-Place Manhole (CIPM) Rehabilitation. The City of Dallas is seeking companies whose combination of experience and personnel will provide professional services as required to fulfill all aspects of these specifications timely and in its entirety.
Questions answered, submission deadline extended to July 19, 2024 at 1:00 PM Rehabilitation of Wastewater Main: The Contractor isrequired to install a flexible tube saturated
with a thermosetting, sulfuric acid corrosion resistant, polyester, vinyl ester, or epoxy resin either
inverted or pulled into the existing wastewater main, such that when properly cured extends from
one manhole to the next in a continuous, tight-fitting, corrosion resistant, watertight pipe. The
Contractor must use one of the following methods:
1. Inversion Method - Insert a resin impregnated tube into the existing wastewater main using
an inversion standpipe under a hydrostatic head or air pressure.
2. Pull Method (for 6" - 12" pipes only) - Pull a resin impregnated tube into the existing
wastewater main and expand with a calibration hose through the center and under pressure.
Rehabilitation of Wastewater Manhole: The Contractor is required to install a chemical resistant
CIPM liner. The liner must be multi-layered (three layers) and non-porous. It shall be a laminated
structural system containing a non-porous membrane layered between two structural layers of
woven roving fiberglass. The detailed requirements for CIPM are listed in Section IV-C
(SPECIFICATION FOR SEWER MANHOLE LINING).
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