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EXECUTIVE SUMMARY
Utility Commission Meeting: October 17, 2016
AGENDA ITEM: Keegan lake Drainage Improvement
Feasibility Study
AGENDA SECTION:
New Business
PREPARED BY: John Morast, PE, Interim Public Works
Director AGENDA NO: 6.c.
ATTACHMENTS: Map of 2007 Storm Water Trunk System Map
and Keegan Lake Drainage Improvements APPROVED BY: dj
RECOMMENDED ACTION: None
BACKGROUND
The City of Rosemount Surface Water Management Plan (August 2017) identifies the existing and the
ultimate stormwater management system. The plan identifies land and water resource inventory; provides
an assessment of problems and corrective actions; establishes goals and policies and developed an
implementation priorities and programs.
Section VI of the Plan (Implementation Priorities/Implementation Program) identifies 18 projects as high
priority and the City anticipates implementing at least some of the items within 10 years. The Keegan Lake
Storm Improvements is listed in this group of projects. A feasibility study was performed in 2009 to see if
stormwater improvements could be included in the Bonaire Path Improvement project. The
improvements were shown to be feasible, but an easement was required by the landowner which they were
not willing to provide. The Bonaire Path Improvement project was then constructed without including
Keegan Lake Draining improvements.
A new property owner now owns the property where the easement was required and has complained
about the water elevations in pond 1521. The project was included in the 2017 CIP planning and the
feasibility study should now be updated to survey the area, update rainfalls to Atlas 14 and update any
pond sizing changes. In addition to simply updating the study, we will review the Bonaire Path project to
see if the original plan for pond 1521 drainage is still a viable option. If so, it could potentially identify
changes to reduce some of the overall stormwater project costs.
SUMMARY
No formal action is necessary. Staff is providing an update and discussions on an identified storm
drainage improvement in the Surface Water Management Plan.