SUBJECT:
Title
A Resolution of the Town Council of the Town of Erie Approving an Intergovernmental Agreement between Boulder County and the Town of Erie Re: Rehabilitation of Prince Lake No. 1
Body
DEPARTMENT: Public Works
Department
PRESENTER(S): Todd Fessenden, Public Works Director
David Pasic, Town Engineer
First Name Last Name, Title
POLICY ISSUES:
This is a standard IGA that identifies Boulder County’s responsibilities regarding the rehabilitation of Prince Lake No. 1 and its dam and ongoing maintenance responsibilities of Boulder County. Repairing and maintaining the dam is a safety issue, Boulder County is responsible for that work, and they need access through the Town’s right-of-way or on Erie property to complete the work. This IGA authorizes that access and Town staff has determined the key provisions in the IGA are acceptable.
STAFF RECOMMENDATION:
Recommendation
Approve the Resolution
End
SUMMARY AND BACKGROUND OF SUBJECT MATTER:
The Town of Erie staff is working with Boulder County staff to facilitate proposed rehabilitation improvements to Prince Lake No. 1 and to identify Boulder County’s ongoing maintenance responsibilities associated with this water storage facility.
The County owns Prince Lake No. 1 (the "Reservoir"), a water storage reservoir near the Town’s Schofield Farm. The Reservoir was constructed in 1879 and was decreed to store water for irrigation. The water stored in Reservoir is used primarily for the irrigation of Boulder County Open Space property. The Reservoir was historically classified as a Low Hazard dam by the Colorado Division of Water Resources Dam Safety Branch ("Dam Safety Branch"), but the classification was recently upgraded to a Significant Hazard dam. The County intends to rehabilitate the Reservoir and its dam to comply with the Dam Safety Branch’s current classification requirements and to reduce the flood risk to downstream homes, property, and public infrastructure located in the Town and to comply with the new classification.
The County has completed plans to rehabilitate the dam to mitigate and reduce the potential for failure from a 50-year precipitation event to a 1,000-year precipitation event. Among other elements, the Plans call for raising the dam height a little more than a foot, installing a toe drain, modernizing and enlarging the outlet works, enlarging the spillway and armoring it with riprap, all to increase the Reservoir’s safety. The toe of the Reservoir’s dam abuts the incorporated boundary of the Town and the right of way for 111th Street, a Town street. In order for the County to construct the Reservoir rehabilitation in accordance with the Plans, it will be necessary for the County to perform construction activities and place improvements on portions of the Town’s property.
The IGA with Boulder County documents requirements to obtain necessary permits as well as Boulder County’s ongoing maintenance responsibilities within Erie right-of-way or on Erie Property. The key provisions are as follows:
• Permitting - The County is responsible for obtaining all permits required to construct the proposed improvements in accordance with the proposed plans.
• Maintenance - The County is responsible for ongoing maintenance of all improvements installed as part of the Plans on property owned by the Town. If the County will be providing anything other than routine inspections or maintenance, on any Town owned property, the County will provide advance notice to the Town before any work is completed.
COUNCIL PRIORITY(S) ADDRESSED:
ü Safe and Healthy Community
ü Effective Governance
ü Fiscally Responsible
ATTACHMENT(S):
1. Resolution
2. IGA
3. Exhibit A-4