january - february 2024 A crew of three used an excavator to construct a drop drain on the Sage Trail for the City of Boulder Open Space and Mountain Parks. The drain is a three-tier structure built with purchased stone. A sidewall connects the structure to the headwall of a ditch, protecting a fragile hillside. The depth of the first tier is subgrade to the ditch, and the following sections are subgrade to the prior tiers. Riprap stone fills the space between the tiers. The drop drain was designed to slow water as it drains and to catch sediment from the nearby road prior to entering the ditch.
completed: drop drain
before
before: site
completed drain
completed side wall connected to ditch head wall
restored site
before
finished project included resurfacing part of the existing Sage Trail
moving rock with the excavator
the project was constructed using an excavator
in progress
in progress: first tier is sub-grade to the depth of the ditch
in progress