Site work for a civil project in Ottumwa, Iowa. Working plans call for site work for a water / sewer project.

As of September 12, 2024 bids received were rejected as they were over the budget. No definite date for rebid. The Project Base Bid Work consists of: 1. Modifications to the influent aeration piping for the four existing Vertical Loop Reactor (VLR) basins. 2. Installation of four (4) owner furnished 8" electric modulating butterfly valves for control of air to VLR Basins 1 through 4 and one (1) 4" manually actuated butterfly valve for control of air to the Primary Clarifier Pre-Aeration Tanks. Contractor is responsible for coordinating and assisting. 3. Provide four (4) 8" mass airflow sensor for measuring airflow to VLR Basins 1 through 4 and one (1) 4" mass airflow sensor for measuring airflow to the Primary Clarifier Pre-Aeration Tanks. 4. Installation of two (2) owner furnished Dissolved Oxygen (DO) Analyzers for VLR Basins 3 and 4. Contractor is responsible for coordinating and assisting. 5. Aeration piping modifications and installation of a mass airflow sensor and Owner Furnished manually operation butterfly valve on the aeration piping to the primary clarifier's pre-aeration basins. 6. Conduit, electrical wiring, and control wiring to the mass airflow sensors and electric actuated butterfly valves for VLR Basins 3 and 4. 7. Programming modifications to integrate the additional instrumentation and control valves into the existing SCADA. 8. Owner has a separate contract with Howden to complete modifications to the Master Control Panel so airflow control to the VLR Basins can be adjusted automatically including I/O and PLC modifications to add the future meters and controls valves. Contractor is responsible for coordinating and assisting Howden with this work. 9. Owner has a separate contract with Howden to complete modifications to two existing Turblex Blowers. Modifications include replacing the impellers with smaller impellers to deliver lower airflow demands. Contractor is responsible for coordinating and assisting Howden with this. 10. Contractor is responsible to coordinate and assist Howden with Manufacturer's Class I (40,000 hours) Servicing on the Turblex Blowers. Question Deadline 08/21/2024 Bidder shall submit all questions about the meaning or intent of the Bidding Documents to Engineer in writing. Contact information and submittal procedures for such questions are as follows: A. Adam A. Smith - Project Manager HDR Engineering, Inc. 300 E. Locust Street, Suite 210 Des Moines, IA 50309-1823 Phone: 515-280-4962 Email: Adam.alonzo.smith@hdrinc.com *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document.