202581655 - Water Quality Infrastructure Improvements

This request is for a competitive Invitation for Bid (IFB) procurement to select a qualified contractor to provide Annual Water Quality
Infrastructure Improvements at Denver International Airport (DEN). DEN seeks to construct storm drainage and water
quality/detention infrastructure at two distinct project sites under the same project. This procurement is driven by the annual erosion
control Capital Improvement Plan (CIP) program that requires DEN to make improvements to stormwater infrastructure as a
compliance obligation under the Denver Revised Munipal Code Sec 56-112. The first project site, located at 7491 N Gun Club Road,
proposes the construction of a regional water quality and detention pond southwest of the 75th Avenue and Gun Club Road
intersection, and east of Second Creek. The proposed pond provides regional water quality and detention for a 140-acre tributary area
and will eliminate the need for three existing water quality ponds that are tributary to the site. The construction scope includes
earthwork and grading, construction of storm drainage lines and improvements to an open drainage channel, construction of the water
quality pond and associated concrete work, and erosion and sediment control measures. The work at this site will also include the
demolition and decommissioning of three existing water quality ponds in the vicinity. The second project site, located at 24735 E 75th
Avenue, proposes the construction of a consolidated water quality and detention pond that north of the WorldPort #12 Building.
Stormwater runoff from the WorldPort development currently drains to two existing water quality ponds, which will be
decommissioned as part of the work. The construction scope includes earthwork and grading, construction of storm drainage lines,
removal and replacement of asphalt pavement and curb and gutter, construction of the new water quality pond and associated
concrete work, and erosion and sediment control measures. The demolition and decommissioning of two existing water quality ponds
is included in the scope as well. The project budget was established using Engineer Estimates of Probable Cost delivered at the IFB
level of design.