Cal-Sag Crossing
Project ID: AWSP-07-01
Project Description: Approximately 600 feet of 66" diameter transmission main in rock tunnel
Project Area: Palos Hills, Palos Park
Project Status: Design
Bid Advertisement Date: 10/22/2026
Construction Start Date: Q2 2027
Construction Completion Date: Q2 2029
Contractor Name: TBD
Submit construction questions or comments to construction@gpwc-il.org
or by calling 833.815.GPWC (833.815.4792)
Project Notes
Updated 09/17/2026 The design team has submitted the 100% design documents for review.
Updated 08/20/2026 The design team has completed the 90% design review process and is moving into 100% design.
Updated 06/11/2026 The design team has submitted the 90% design documents for review.
Updated 05/01/2026 The design team is nearing completion of the 90% design documents.
Updated 12/17/2025 The design team has completed the 60% design review process and is moving into 90% design.
Updated 10/06/2025 The design team has submitted the 60% design documents for review.
Updated 09/05/2025 Design in progress. Field investigations complete.
Updated 07/04/2025 Design in progress. Field investigations ongoing.
Updated 04/04/2025 Design in progress. Access permit for field investigations approved.