$518K project begins to upgrade King Street stormwater detention pond

$518K project begins to upgrade King Street stormwater detention pond

Nov. 15, 2017; updated with second photo Nov. 28, 2017
The Colorado Springs stormwater division has begun a $518,829 project to upgrade the city's King Street detention pond.
Featured elements will be an emphasis on water quality and a slower release of the water leaving the pond, which will

Backhoes begin reshaping the city's King Street detention pond. Homes along the north side of King can be seen in the background.

Westside Pioneer photo

help increase the pond capacity from 3.35 to 6.5 acre feet. The overall goal is to meet an industry standard known as “full spectrum detention,” said Brian Kelley, the project manager for Colorado Springs Stormwater.
The contractor is Langston Concrete of Florence. Completion is scheduled before Christmas, and there should be no impact on the public, other than the temporary closure of a walking trail through the 9.6-acre property, Kelley said.
“The existing pond provides zero water quality and detains very little water, allowing most of it to pass through the pond,” he explained. “Improvements will include adding a forebay at the inlet pipe to collect

Taken about two and a half weeks after the photo above, this picture shows the progress being made. The inlet, forebay and wing walls are in place, with the trickle channel being constructed past what's called the dissipator wall (which also helps slow the storm flow). At far right, along the slope in the background, crews with the contractor, Langston Concrete, complete a 300-foot connection tying an existing 18-inch-wide storm pipe into the new drainage structure.

Westside Pioneer photo

sediment, a concrete trickle channel from the forebay to the pond outlet, adding a concrete outlet structure to provide detention and water quality, installing a spillway and lining the pipe exiting the pond in order to extend the life of that pipe.”
       Located on the south side of King Street's 2200 block - a residential part of the Westside - the detention pond collects stormwater from the developed hillside above it, after which the water is released into underwater storm drains leading to Fountain Creek.
       The pond was one of 71 sites formally identified as needing stormwater fixes in the city's intergovernmental agreement (IGA) with Pueblo in 2016. The city's recently passed Stormwater Enterprise fee is expected to pay for most of those projects over the next 20 years.
       The IGA had listed the King cost at $250,000, but that was a “very rough estimate and very low,” Kelley said. “We had to make up the difference needed from other project budgets... We're very excited to deliver this project.”
       Crews had previously worked on the King detention pond in 2014, in a $100,000 maintenance project that included work around the outfall and its channel.

Westside Pioneer article
(Projects: Flood Control)

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