SUBJECT:
Title
A Resolution of the Town Council of the Town of Erie Approving an Amendment to the Construction Contract with Territory Unlimited, Inc. for the Erie Commons Irrigation Pond Improvements
Department
DEPARTMENT: Utilities
Presenter
PRESENTER(S): Todd Fessenden, Utilities Director
end
Time
TIME ESTIMATE: 0 minutes
end
Fiscal
FISCAL SUMMARY:
Cost as Recommended: $ 236,180
Balance Available: $ 638,500
Fund Water Fund
Line Item Number: 500-75-110-605000-100440
New Appropriation Required: No
Policy
POLICY ISSUES:
None
Recommendation
STAFF RECOMMENDATION:
Approve the resolution
Body
SUMMARY/KEY POINTS
• The current erosion must be fixed
• Not repairing now could cause further erosion and complete failure of the pond embankment
• An amendment to expand the scope of recent work is the quickest and most cost effective approach
• This pond is used to provide irrigation water to Erie Commons and Erie Community Park as well as adjacent areas
BACKGROUND OF SUBJECT MATTER:
The Erie Commons Irrigation Pond (Pond) is used to store and deliver irrigation water to meet the Town’s irrigation raw water obligations to Erie Commons and the Town’s Community Park. The Pond is located east of the Erie Commons subdivision and adjacent to Coal Creek, just east of the Leon A. Wurl Service Center. The Pond has a history of embankment repairs including:
• September 2013 Flooding - Severely damaged the north and south banks which were repaired in 2013.
• Spring 2017 - Repairs performed to install soil riprap across the entire north bank of the Pond and grouted boulders adjacent to an existing sheet pile cut off wall where the Pond is designed to overtop.
• Fall 2023 - Further north bank erosion observed due to high Coal Creek flows and over-flowing of the Pond due to storm events.
• In early 2024 - Repairs included replacement of failing grouted boulders and extending the grouted boulder protection to the northeast side of the Pond.
In the Spring 2025, the Contractor completed pond dewatering and drop structure subgrade stabilization which included, installing a vertical sheet pile “cut-off wall” approximately 200-feet long along the north and northeast pond embankment.
A recent storm caused erosion slightly west of the current repairs which has caused seepage from the pond, and the pond bank to become unstable. By increasing the scope of work with Territory Unlimited, we can continue the repairs from spring of 2025 to include this area of the pond bank and possibly connect the area repaired in 2013 creating a connected repair that should hold against high flows from Coal Creek and large storm events.
Original Contract Price: $314,586.00
Pond Dewatering: $2,232.00
Drop Structure Subgrade Stabilization: $33,600.00
Emergency Erosion Stabilization: $160,279.00
Contingency Available: $40,069.00
Total: $550,776.00
Staff is recommending approving the amendment for a base amount of $196,111 and a contingency of $40,069 for a total of $236,180.
priorities
TOWN COUNCIL PRIORITY(S) ADDRESSED:
☐ Attractive Community Amenities
☐ Engaged and Diverse Community
☐ Prosperous Economy
☒ Well-Maintained Infrastructure
☐ Small Town Feel
☒ Safe and Healthy Community
☒ Effective Governance
☒ Environmentally Sustainable
☒ Fiscally Responsible
attachments
ATTACHMENT(S):
1. Resolution 25-137
2. Amendment