Title
A RESOLUTION AUTHORIZING A CONTINGENT AGREEMENT WITH CATELLUS CC NOTE, LLC, FOR THE RECONSTRUCTION OF A CITY OWNED POND TO ACCOMMODATE STORM DRAINAGE FROM A PROPOSED SUBDIVISION
Body
The purpose of this resolution is to authorize the City Manager to enter into a contingent agreement with Catellus CC Note, LLC, which is the developer of Turnberry Filing 7, for the redesign, reconstruction and maintenance of a City owned pond located on the Bison Ridge Recreation Center property in support of the development.
Summary & Background
There is an existing retention pond located on the Bison Ridge Recreation Center property (See Attachment 1 Project Map). The pond collects the stormwater drainage from a portion of the recreation center site. The pond’s ability to properly drain in compliance with the City’s stormwater permit from CDPHE is questionable and reconstruction of the pond is necessary. Further, there is no outlet from the pond casuing the pond to retain drainage from the Bison Ridge Recreation Center property.
Turnberry Filing 7 is going through the plan development process. The plat was posted for approval. A detention pond is needed to serve the northern portion of the Turnberry Filing 7 development. During the initial planning process, the City approached the developer to determine if they were interested in partnering to convert the existing retention pond on the Bison Ridge Recreation Center into a shared detention pond. The shared detention pond would be enlarged to accommodate the drainage from the northern portion of the development and an outfall would be constructed to allow the pond to drain within 72 hours after a rain event. Enlarging the pond will not conflict with future expansions of the recreation center. An outfall would need to be installed under the O’Brian Canal in order to allow the pond to drain.
The collaboration between the City and Catellus CC Note, LLC by having a shared pond will benefit both parties. The developer would have additional lots to construct homes where a detention pond on their property to serve their development would otherwise be located while also avoiding troublesome engineering obstacles to otherwise allow stormwater drainage east to Second Creek. As part of the agreement, the developer agrees to fund and construct the improvements to the pond, acquire the easement from FRICO to construct the outfall under the O’Brian Canal, acquire the easement from the property owner located east of the canal to discharge the pond drainage to the Second Creek floodplain, and provide a means to maintain the pond after the construction is complete.
A temporary construction license will need to be approved by the City Manager prior to construction of the pond improvements. In addition, a permanent drainage easement around the pond will need to be approved by City Council prior to the improvements being completed. After the improvements are constructed, the City would have a compliant detention pond on City property and would not have to maintain the pond afterwards.
The work to install the outfall under the O’Brian Canal can only occur during a specific time this summer when the water level is at its lowest. Therefore, time is of the essence to get this agreement approved in order to not delay the construction for another year.
Staff Responsible (Department Head): Shawn Poe, PE, CFM, Interim Director of Public Works/City Engineer
Staff Presenting: Shawn Poe, PE, CFM, Interim Director of Public Works/City Engineer
Financial Impact: N/A. The developer will pay the cost for the pond improvements and easement documents.
Funding Source: N/A. The developer will pay the cost for the pond improvements and easement documents.
Staff Recommendation: Approve a resolution authorizing a contingent agreement with Catellus CC Note, LLC, for the reconstruction of a City owned pond to accommodate storm drainage from a proposed subdivision.
Suggested Motion: Motion to approve a resolution authorizing a contingent agreement with Catellus CC Note, LLC, for the reconstruction of a City owned pond to accommodate storm drainage from a proposed subdivision.