Town of Columbine Valley

Where Club Lane meets Middlefield Road and intersects Niblick Lane, ICON has designed drainage improvements through the introduction of two shallow-sloped cross pans and a proposed increase in pipe size at a drainageway to the north of Middlefield Rd. This will improve drainage by allowing stormwater to flow in designated flow lines and inlets rather than pooling in the streets and gutters. There is also a point just north of the intersection on Middlefield Rd where the flowline will be raised to decrease ponding on the side of the road.

Construction of these cross pans and new pipe should occur in January of 2023. Affected streets include Middlefield Road, Club Lane, and Niblick Lane. A notice will be sent out by the contractor along with the town to the homeowners of Columbine Valley as the intersection to this road will be either fully or half-closed. Alternative routes will be provided to residents as a way to bypass the construction. Additionally, residents will be notified of the approximate length of construction, although snow and other weather may effect the duration of the construction.

After construction is completed, homeowners and visitors should see two soft-sloped cross pans on either side of Niblick Lane at the intersection with Club Lane and Middlefield Road. These act as minor dips in the road and are designed be soft enough to ensure no damage to vehicles following the designated speeds on the road. During and after rainstorms, water will be flowing the designated flowlines instead of pooling on either side of the street.

Proposed improvements at Village Dr consist of installing new inlets on both the north and south flowlines along with reshaping of the gutters. This will allow for improved drainage from Village Dr and the connecting streets into Nevada Ditch. Overflows will be able to flow down towards Middlefield Rd, but all water meant for Nevada Ditch will now find its way into the ditch.

Currently, there have been two cast-in-place headwalls installed and the rest of the project is planned to be completed once the ice has been removed around proposed inlet locations. New inlets and improved gutter pans have also been added, as seen below. Notices have been provided to nearby homeowners and any changes in construction operations and plans will be provided to the residents impacted at Village Dr.

Construction of the Village Dr improvements began at the end of December 2022 and is currently planned to be completed by the end of January 2023. Residents will see improved drainage of the gutters during future storm events. There will also be new inlets and headwalls that should be discreet enough to not impair the natural beauty of the neighborhood.

The proposed drainage improvements on Spyglass Dr are relatively simple compared to the other drainage projects. On the street, between 54 and 73 Spyglass Dr, ICON is proposing the replacement of three existing inlets and one manhole with larger, higher capacity inlets. An example of the inlets being replaced can be seen below. This will improve drainage through the flowlines, decreasing ponding on the street and leading to more water being captured by stormwater infrastructure.

This project should be completed, when necessary, at the beginning of 2023. Residents of Spyglass Dr and visitors driving on this street will be impacted by the inlet installation and replacement. Because of this, residents will be notified of new traffic patterns and potential short term roadway blockages during the installation of the new inlets. Upon completion, residents should notice less pooling throughout the flowlines on both sides of the street.

Approximately 150 feet from the tee box on hole 13, just to the east of where Fairway Ln meets Damsire Dr, ICON Engineering has proposed the replacement of an existing pipe with an 18" reinforced concrete pipe (RCP). The stormwater improvements from this project come from increased drainage by increasing the overall flow area that can drain through the pipe, reducing ponding near the golf course.

Removal and replacement of the current pipe will take place in 2023, ideally before the golf season in early spring. However, the dates for this project have not been finalized. This construction project should be of minimal disturbance to the surrounding homeowners, members, and visitors to the Columbine Valley, but a notice for construction will be sent out prior to construction. There may be need for traffic control services and alternate routes may be provided to impacted residents depending on the access point to this site.

After construction, the main visual impacts will be to residents driving past the course. The drainage improvements will reduce ponding and improve drainage on the eastern side of the hole, providing less of an eye-sore for those driving throughout the neighborhood. Eventually, this project will hopefully lead to better vegetation growth in the impacted area with less ponding and more steady irrigation.