Site work for a water / sewer project in South Lake Tahoe, California. Working plans call for site work for a water / sewer project.

**As of August 28 , 2025 project has been canceled. As of this time it is unknown if an when project will rebid. "The owner has determined a prequalified list of general contractors. A timeline for award has not yet been established.** Estimated Bid Value $9,500,000.00 Q&A Deadline 08/21/2025 4:00 PM (PDT) Notice is hereby given that the South Tahoe Public Utility District has determined that all Control System Integration subcontractors that wish to be listed in a bid for the Wastewater Treatment Plant Aeration Blower System Improvements Project to be undertaken by the District must be pre-qualified prior to submitting a bid on that project. It is mandatory that all Control System Integrators who intend to submit a bid fully complete the pre-qualification interest form and pre-qualification questionnaire, provide all materials requested, and be approved by the District to be on the final qualified Bidders list. No bid will be accepted from a Control Systems Integrator that has failed to comply with these requirements. The site of the work is located at the District's Wastewater Treatment Plant at 1275 Meadow Crest Drive in South Lake Tahoe, El Dorado County, California. The Project consists of: Installation of a new hybrid positive displacement screw blower to replace an existing diesel engine driven blower, new motor control centers (MCC's) in the Blower Building, new aeration system controls and instrumentation, new aeration control valves and flow meters for Aeration Basins Nos. 1, 2, and 3, new motor operated control valves for existing blower air inlets, power monitoring and integration into SCADA for various existing MCC's, a new fire alarm control panel for the Blower Building, replacement of other electrical gear throughout the plant including MCC's and a transformer, and other ancillary equipment and demolition work as indicated in the Contract Documents. The project is located at the District's Wastewater Treatment Plant at 1275 Meadow Crest Drive in South Lake Tahoe, El Dorado County, California. The Wastewater Treatment Plant shall remain in service at all times while the new facilities are being constructed. The Engineer's Estimate for all improvements associated with this the Project is approximately $8,000,000.00. January 30, 2025 Last day for applicants to ask questions or submit objections Under subcontract to the General Contractor, the Control Systems Integrator shall provide PLC, SCADA programming and software integration services to complete the Project. In summary, the Control Systems Integrator will be expected at a minimum to perform the following for the Project: Participate in Control Strategy refinement during the project submittal process with the District and the Design Engineer; Participate in HMI Design Review meetings with the District and the Design Engineer, following the District's established programming and screen styles; Select, furnish, construct, install (and/or supervise installation), configure, calibrate, test, and place into operation transmitters, instruments, programmable controllers, control panels, motor controls, alarm equipment, communications, monitoring equipment, and accessories; Coordinate software programming requirements with the General Contractor, the District, the Design Engineer, and the blower vendor control panel; Construct and test control panels bearing a UL 508A label at the Contractor's panel fabrication facilities; Program PLCs to implement the signal processing and logic required for the Project, not including PLCs provided by equipment suppliers; Modify and upgrade existing SCADA system to incorporate work associated with aeration blower improvements, without jeopardizing the function of the existing system; Program and configure human machine interfaces (HMI); Provide startup and testing services for the above items; and Provide warranty, training, O&M Manuals, and record documents for the above items. The Control Systems Integrator will be required to provide a 3 year service contract for the installed SCADA systems following the acceptance of Work. The unique nature of the Project requires that the Control Systems Integrator have experience within the past five (5) years in controls integration within existing systems for at least three (3) Public Works infrastructure projects similar to the Project of at least $1 million each in California or Nevada. Each Pre-Qualification Packet must be signed under penalty of perjury in the manner designated at the end of the form, by an individual who has the legal authority to bind the Control System Integrators (hereafter called "Applicant") on whose behalf that person is signing. The Applicant shall provide only complete and accurate information. The Applicant acknowledges that the District is relying on the truth and accuracy of the responses contained therein. If any information provided by an Applicant becomes inaccurate, the Applicant must immediately notify the District and provide updated accurate information in writing, under penalty of perjury. Blower Building Work - Replace Blower No. 4 - Sole-sourced Aerzen Hybrid PD Blower - Demo existing diesel tank & remaining fuel from the diesel-driven blower. - Blower No. 4 core will be turned over to the District a shelf-spare, demo and dispose of the diesel engine drive. - Relocate air compressor from blower building to the biosolids building. - Replace existing air filter supports - Match existing filter frame - Aeration Basin Improvements - One blower kept in service at all times, two temporary blowers needed for shutdowns >15min - Drain aeration basins one at a time, Contractor to clean the basins - New ductbank outside of the blower building, transitions to buried conduit. -Replace MCC-3, 11, and 12 to include power metering - Temporary MCCs are needed prior to shutdown. For the blower building, a weatherproof temporary MCC is needed outside of the building - MCC-11 : a portable generator shall be provided to power the temporary blower - Integrate power metering into SCADA - MCC/Electrical Building (MCC-SEPS, MCC-FEPS) -Hypo Building (MCC-SHS) - Emergency Pump Station (MP-3, MP-4) -Replace switchboards MP-3 and 4 & transformer T-3 -MP-4 shutdown reguires an open tie-breaker to allow MP-3 and T-3 to be used for power supply to emergency pump station - MP-3 and T-3 shutdown requires an open tie-breaker to allow MP-4 and T-4 to be used for power supply to emergency pump station -New ductbank between EHH-4 and transformer