Site work and new construction of a civil project in Dubuque, Iowa. Completed plans call for site work for a water / sewer project; bridge / tunnel; and for the construction of a water / sewer project.

The project includes the construction of a new stormwater pumping station on the protected side of the flood protection levee at the confluence of the Bee Branch Watershed with the Mississippi River. The overall structure will have approximate plan dimensions of 100' x 160'. The structure will be constructed on the west end of the existing twin 12'x12' culverts. The structure is planned to include four 90,000 gpm stormwater pumps, two 12'x14' main gates for gravity flow from the 16th Street Basin (end of Bee Branch watershed), and two 12'x9' emergency gates. Additionally, the contract will include an electrical controls building to control the pump and two standby generators to provide backup power to the proposed stormwater pumps. The project will also include the removal of the existing stormwater pumps and demolition of portions of the existing stormwater pump station. The anticipated excavation limits for the proposed project is anticipated to be approximately 140' x 200'. All excavation will be on the protected side of the levee in the 16th Street basin. There will be no excavation on the river side of the flood protection levee. The excavated area will consist of an area protected during construction by sheeting to allow the excavation and construction of the structure. The proposed bottom of the portion of the structure is planned to be approximately 15 ft. below the flowlines of the existing culverts. Construction Cost Estimate: $25,400,000 Work on the Project must be commenced within ten (10) calendar days after the Notice to Proceed has been issued with a Substantial Completion date for pump station commissioning by March 19, 2027, with Final Completion of project by July 2, 2027. Each Bidder must accompany its Bid with a Bid security as security that the successful Bidder will enter into a contract for the work Bid upon and will furnish after the award of contract a corporate surety Bond, acceptable to the governmental entity, for the faithful performance of the contract, in an amount equal to one hundred percent of the amount of the contract. The Bid security must be in the amount of ten percent (10%) of the amount of the contract and must be in the form of a cashier's check or certified check drawn on a state-chartered or federally chartered bank, or a certified share draft drawn on a state chartered or federally chartered credit union, or the Bidder may provide a Bid Bond with corporate surety satisfactory to the governmental entity. The Bid Bond must contain no conditions except as provided in this section. *Project information has been obtained through a public capital improvement plan (CIP). A CIP is a financial schedule for short- and long-range projects which is updated regularly. Information listed in the CIP often evolves based on funding availability and the project details, including timeline and value, are subject to change. The content management team will continue to pursue additional details as they become available. The City of Dubuque, Iowa, reserves the right to reject any and all Bids. Liquid-filled, three-phase, two-winding unit substation transformers, 300 to 10,000 kVA with sidewall, through-tank bushings per ANSI/IEEE C57.12.00. The transformer high voltage is over 600 volts. A "primary" unit substation transformer has a secondary/low voltage greater than or equal to 1000 volts. The transformers covered by this specification are not intended to have open, unguarded, top-mounted air bushings. Sidewall bushings shall be provided that are fully enclosed in air terminal boxes/chambers where no connections are unguarded or exposed. This specification section covers dry type, two-winding, distribution transformers, including solid-cast and resin-encapsulated transformers rated 35 kV or less. The primary winding shall be rated over 600 volts. The secondary voltage rating may be greater than 600 volts. This specification section is intended for transformers that shall not have any live parts after installation is complete. The transformer construction shall be substation type, with side-wall mounted primary and secondary terminations A. The engine generator system shall provide optional standby power to operate the pump station when normal, utility sourced power is not available. B. System Capacity: Each individual generator shall be rated at 1750 KW, 2188 KVA (0.8 Power Factor) at an elevation of 1,000 feet above sea level, and ambient temperature between -20F and 110F; standby rating using an engine-mounted radiator. The generator units shall be installed and operated in Dubuque, Iowa. C. There shall be a quantity of two (2) generators of the same individual ratings, that can be operated in parallel on the pump station SG-MVX, 4160-volt switchgear bus. 1. A single engine generator shall be able to operate the pump station supplying the station services step-down, 4160-volt to 208/120 VAC, transformer loads, plus start and run two (2) of the pump stations, 900-horsepower pumps. The pump motor starts shall be individual with the assist of the Motor Start Capacitor Bank connected to the 4160-volt, SG-MVX switchgear. The Motor Start Capacitor Bank will help provide voltage support during motor starting and minimize voltage dips. With the Motor Start Capacitor Banks assisted starting, the generator voltage dip shall be less than 20-percent. 2. When the pump station has two (2) engine generators running in parallel, that combination of generators will full supply the station services transformer load, plus be able to start and run all four (4) 900-horsepower pump motors. The pump motor starts shall be individual with the assist of the Motor Start Capacitor Bank connected to the 4160-volt, SG-MVX switchgear. The Motor Start Capacitor Bank will help provide voltage support during motor starting and minimize voltage dips. With the Motor Start Capacitor Banks assisted starting, the generator voltage dip shall be less than 20-percent. D. The packaged engine generator system for this project is considered "optional standby power" per the National Electrical Code Article 702. This packaged engine generator system is therefore not considered an NFPA 110 emergency system, but this system may specify some monitoring and controls that are equivalent to that of NFPA 110 classified systems. 1. This generator system is not considered the source of power for any life safety systems, such as emergency lighting, does not need to be available within 10- seconds. The main purpose of this optional standby power is to allow operation of the station pumps when the normal utility system supplied power is not available. Upon the loss of normal utility power, the station, large AC motor driven pumps will not automatically start but shall need to be manually started by Station Operations Personnel. Since the pump station normal lighting and control power 208/120 VAC power distribution is dependent upon power being available on the pump station 4160-volt, SG-MVX switchgear bus to be stepped down through a station services transformer, it is desired that the station generators be able to supply 4160-volt power to be able to energize the station services transformer and restore station 208/120 VAC power to minimize the amount of time that station equipment and controls are operational on battery-backed up systems associated with the station equipment. 2. As a specification target, a station engine generator shall be started and be on-line to be able to pick-up the supply of power to the station services transformer loads within 2-minutes from the loss of utility power. The pump station generator controls system shall confirm the requirement to start the generators and open the normal utility sourced incoming power circuit breaker within the pump station SGMVX, 4160-volt switchgear within a configurable control system time delay parameter associated with low voltage on the normal utility sourced power and the SG-MVX bus. The time delay to confirm loss of utility sourced power (voltage) prior to the control system starting the engine generators shall initially be 15- seconds, but the delay value may be increased or decreased. It is desired that the delay is not less than 7-seconds to make certain that any motors in operation at the time of a power loss are no longer rotating, and the motor starters have dropped out on loss of voltage. A. General: The unit shall provide transient voltage suppression, surge current diversion and high-frequency noise attenuation, when connected in parallel to the facilities distribution system. The unit MCOV shall not be less than 115% of the nominal system voltage. Operating frequency shall be for a 60 Hz system. The unit shall provide protection in all normal modes for "wye" and "delta" systems. The short circuit current rating shall be the larger of the listed value on the drawings or as required by the equipment protected. 1. Comply with AWWA C219. 2. Flange class shall match the outlet flanges of the proposed pumps. 3. Flange body and end rings shall consist of carbon steel. 4. Nuts and bolts for the coupling shall shall be 304 stainless steel. 5. The coupling shall be painted in accordance with the painting specifications for the exterior of the pump discharge tubing and steel piping. 6. Gaskets: a. Comply with ASTM D2000.