Title
Proposed Amendment No. 1
Contract No. 2303968/SCN-0000352
96-Inch Water Transmission Main Relocation Project - 84-Inch Triple Offset Ball Valve Procurement
CIP #122004 / BCE Score: 77.50
Body
Agenda of: May 27, 2026
Item No.: 2026-168
Amount: Original Amount $3,240,588.46
Proposed Amendment No. 1 0.00
Total Contract Amount $3,240,588.46
TO: The Honorable
Board of Directors
Great Lakes Water Authority
FROM: Suzanne R. Coffey, P.E.
Chief Executive Officer
Great Lakes Water Authority
DATE: April 28, 2026
RE: Proposed Amendment No. 1
Contract No. 2303968/SCN-0000352
96-Inch Water Transmission Main Relocation Project - 84-Inch Triple Offset Ball Valve Procurement
Vendor: Cascade Consultants, LLC
Status: Amendment/Change Order
MOTION
Upon recommendation of Cheryl Porter, Chief Operating Officer - Water and Field Services, the Board of Directors (Board) of the Great Lakes Water Authority (GLWA), authorizes the Chief Executive Officer (CEO) to enter into Contract No. 2303968/SCN-000352, Proposed Amendment No. 1, “96-Inch Water Transmission Main Relocation Project - 84-Inch Triple Offset Ball Valve Procurement” with Cascade Consultants, LLC, with no increase in cost for a total cost not to exceed $3,240,588.46 and an increased duration of 730 days for a total duration of 1,460 days; and authorizes the CEO to take such other action as may be necessary to accomplish the intent of this vote.
BACKGROUND
The existing 96-inch water transmission main (WTM) is part of GLWA’s overall drinking water transmission main system that interconnects the Lake Huron Water Treatment Plant with the Northeast and Springwells water treatment plants through the North Service Center Pumping Station. The existing 96-inch WTM was constructed in the mid-1960s and was placed into service in December 1967. Part of the original construction of the 96-inch WTM was a section within Shelby Township that was installed within the influence of the G&H Industrial Landfill site.
The current relocation project consists of approximately 2.5 miles of 96-inch WTM currently located in the influence of the decommissioned G&H Industrial Landfill site, a listed U.S. Environmental Protection Agency Superfund site located in Shelby Township, MI. The construction has been sequenced to occur in three phases.
• Phase I referred to as the “Early Works Package - Avon Road Improvements” consisted of 2,200 lineal feet of new 96-inch WTM to be installed along Avon Road in Rochester Hills. Phase I construction is complete.
• Phase II referred to as “Dequindre Road Package” includes installation of 7,985 lineal feet of 96-inch WTM installation along Dequindre Road between Hamlin Road and the Macomb Orchard Trail just north of 23 Mile Road. Phase II construction is complete.
• Phase III scope of work will include 2,900 lineal feet of 96-inch WTM installation along the Macomb Orchard Trail between Dequindre Road and 24 Mile Road. Phase III will include the system isolation, final connections near the Rochester Booster Station and the intersection of Dequindre/Hamlin Roads and the abandonment of existing WTM.
Once all three phases are complete, the relocated 96-inch WTM will be connected to GLWA’s existing WTM system between North Service Center and Rochester Booster Station. Upon placing the new section of 96-inch WTM into service, the existing WTM within the influence of the decommissioned G7H Industrial Landfill site will be decommissioned and abandoned in place.
GLWA pre-purchased two 84-inch Triple Offset Ball Valves for Phase III of the 96-Inch Water Transmission Main Relocation Project due to the extended lead times. If GLWA had included valve procurement within the Phase III project scope, the overall project schedule could have extended 12-18 months. The GLWA project team is currently targeting project completion by Spring of 2028 and has communicated this milestone with all the project stakeholders.
JUSTIFICATION
The request for a time extension is due to several factors including the Phase III Design-Build contract project schedule and valve body casting delays experienced by the valve manufacturer. This time extension will adjust the Cascade Consultants contract to meet the forecasted Phase III project schedule that includes tasks related to the new 84-inch isolation valves.
PROJECT MANAGEMENT STATUS
Original Contract Time 730 days (04/01/2024 - 03/31/2026)
Proposed Amendment No. 1 730 days (04/01-2026 - 03/30/2028)
New Contract Time 1,460 days (04/01/2024 - 03/30/2028)
PROJECT ESTIMATE
Original Contract Price $3,240,588.46
Proposed Amendment No. 1 0.00
New Contract Total $3,240,588.46
FINANCIAL PLAN IMPACT
Summary: Sufficient funds are provided in the financial plan for this project.
Funding Source: 5519 - Water Construction Fund
Cost Center: 880000 - Capital Improvement Program
Spend Category: Construction: Materials
Project Worktag: PRJ-122004
Estimated Cost by Year and Related Estimating Variance:
Original Contract Price $3,240,588.46
Proposed Amendment No. 1 0.00
New Contract Total $3,240,588.46
Amended Financial Plan Estimate $3,240,588.46
Estimating Variance $ 0.00
COMMITTEE REVIEW
This item was presented to the Operations and Resources Committee at its meeting on May 13, 2026.
SHARED SERVICES IMPACT
This item does not impact the shared services agreement between GLWA and DWSD.