Site work for a water / sewer project in Irving, Texas. Completed plans call for site work for a water / sewer project.

The work consists of demolishing and replacing an existing valve and flow meter with a 36-inch ball valve and electromagnetic flow meter. The work will take place inside an existing underground vault. Structural modifications to the vault are included to accommodate valve replacement. The project is located east of Doe Branch Creek, off of HWY 380 in Prosper, TX. This is a raw water facility. The Work includes upgrades to an existing raw water flow control vault used to split flows between downstream agencies. This shall include the removal of an existing 18" sleeve valve, 36" Butterfly valve, 36" venturi meter, and various piping, supports, and appurtenances. The Work also includes replacement of the valves and flowmeter with a new 36" electromagnetic flowmeter and 36" ball valve with an electric actuator, as well as necessary piping, supports, and appurtenances for the improved system. Question Deadline 12/29/2025 at 5:00 PM CT Submit questions electronically via this site. No verbal questions will be accepted. Project construction constraints and sequence presented herein do not include all items affecting completion of the Work. They are intended to describe critical events necessary to minimize disruption of the existing raw water supply to Lake Lewisville and to minimize disruption to Upper Trinity Regional Water District's (UTRWD) Tom Harpool Water Treatment Plant (WTP). Additionally, items described do not include a complete list of all work required to be completed by the Contract. Work shall be completed within the specified contract time. Consider the sequence, duration limitations, and governing factors outlined in this Section to prepare the schedule for the Work. Construction Constraints 1. Demolition Pre-requisites a. For all construction activities involving removal and replacement of piping, equipment and appurtenances; replacement piping, gaskets, equipment and appurtenances must be on-site prior to beginning any demolition activities. Contractor shall keep two extra gaskets on hand of each size required, as applicable. b. For all construction activities involving removal and replacement of structures or structural components, Contractor shall take measures to protect materials and equipment that may be damaged as a result of demolition activities. c. Demolition may not commence without Owner's written approval and shutdown of raw water deliveries from the Prosper Ground Storage Tank (Area 5). 2. Shutdown raw water deliveries form Prosper Ground Storage Tank (Area 5) before removal, repair, inspection, or installation of any piping or valves. a. Contractor shall coordinate with the Owner for operation of mainline isolation valve(s) required to drain the 72" waterline. b. Dewatering of pipe between Ground Storage Tank and Flow Control and Meter Valve will be performed by the Owner. c. Once pipe is drained, Contractor shall coordinate with the Owner for closure of mainline isolation valves just upstream, within fenced in area, of Doe Branch Discharge's (DBD) Flow Control and Meter Vault (Area 6). d. Two mainline isolation valves must be closed and the 72" waterline between the valves must be drained before any demolition and/or replacement of piping, equipment, and valves begins. 3. Reestablish raw water deliveries from Prosper Ground Storage Tank (Area 5) before removal, repair, inspection, or installation of any piping or valves. a. Contractor shall coordinate with the Owner for opening of mainline isolation valve(s) required to fill the 72" waterline. b. Filling of pipe between Ground Storage Tank and Flow Control and Meter Valve will be performed by the Owner. c. Once pipe is filled, Contractor shall coordinate with the Owner for opening of mainline isolation valves just upstream, within fenced in area, of Doe Branch Discharge's (DBD) Flow Control and Meter Vault (Area 6). d. Both mainline isolation valves must be opened and the 72" waterline between the valves must be filled after any demolition and/or replacement of piping, equipment, and valves takes place. C. Construction Sequence 1. The contractor will be allowed to take advantage of up to six (6) short-term raw water delivery shutdowns of no more than two (2) days each from the Prosper Ground Storage Tank (Area 5) to complete work in the DBD Flow Control and Meter Vault (Area 6). a. Shutdown #1: Saw-cut Demolition for Existing Vault Concrete Cover for New Concrete Hatch 1) Install protective measures for all existing materials and equipment that may be damaged as a result of demolition activities. Protective measure shall be left in place until new, removable, concrete cover is fully installed. 2) Shutdown system and drain the ground storage tank and pipeline. Approximately 12 hours to complete this task. 3) Saw cut vault concrete cover as outlined in Drawings. 4) Test fit new concrete cover and make field adjustments as necessary. Field adjustments shall not alter the structural integrity of the cover. 5) Install new concrete cover as outlined in the Contract Documents and any supports necessary to facilitate installation of new cover. 6) Reestablish raw water supply. Approximately 12 hours to fill pipeline and partially fill GST. b. Shutdown #2: Install Flow Control Valve 1) Shutdown system and drain the ground storage tank and pipeline. Approximately 12 hours to complete this task. 2) Demolish piping downstream of 36" BFV leading to harnessed mechanical coupling. 3) Remove 18" sleeve valve and 36" butterfly valve as well as reducer piping and any spool leading to harnessed mechanical coupling. 4) Install piping and equipment necessary to complete a watertight installation of 36" ball valve, actuator, and piping. 5) Complete demolition of electrical or instrumentation equipment and installation of new equipment necessary to operate the valve actuator. 6) Reestablish raw water supply. Approximately 8 hours to complete this step. 7) Test operation of ball valve and actuator and set valve to position determined by Owner. c. Shutdown #3: Install Electromagnetic Flowmeter 1) Shutdown system and drain the ground storage tank and pipeline. Approximately 12 hours to complete this task. 2) Demolish piping downstream of existing insulating flange joint leading to harnessed mechanical coupling. 3) Remove existing 36" venturi meter. 4) Install piping and equipment necessary to complete a watertight installation of 36" electromagnetic flowmeter. 5) Complete demolition of electrical or instrumentation equipment and installation of new equipment necessary to power and communicate with flowmeter. 6) Reestablish raw water supply. Approximately 8 hours to complete this step. 7) Test operation of electromagnetic flowmeter and set flow control valve to position determined by Owner. d. Shutdown #4: Adjusting and Preliminary Testing/Calibration of Facility 1) Should any equipment or piping in the Vault need to be disassembled for adjustments, shutdown system and drain the ground storage tank and pipeline. Approximately 12 hours to complete this task. 2) Complete pipe and equipment adjustments. 3) Complete calibration activities as required. 4) Reestablish raw water supply. Approximately 8 hours to complete this step. 5) Contractor may run preliminary testing, calibration, and operational checks in coordination with Owner and Engineer. e. Shutdown #5: Removal of Temporary Supports and Equipment and Minor Field Adjustments 1) Should any equipment or temporary supports in the Vault need to be disassembled, shutdown system and drain the ground storage tank and pipeline. Approximately 12 hours to complete this task. 2) Remove any temporary supports and/or equipment not intended to remain in the facility. 3) Perform any minor field adjustments requiring shutdown. 4) Reestablish raw water supply. Approximately 8 hours to complete this step. f. Shutdown #6: Repair of Leaking 36" Coupling Outside of the DBD Flow Control Vault 1) Excavate upstream piping to expose leak at coupling 2) Shutdown system and drain the ground storage tank and pipeline. Approximately 12 hours to complete this task. 3) Repair or replace leaking coupling 4) City of Irving representative to witness leaking and repair procedure 5) Reestablish raw water supply. Approximately 8 hours to complete this step.