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, Colorado. The drain is a three-tier structure built with purchased stone. A sidewall ties the structure into the ditch headwall, protecting a fragile hillside. The first tier is set subgrade to the ditch; the subsequent tiers are set subgrade to the preceding ones. Riprap fills the spaces between the tiers. The drop drain is designed to slow water as it drains and to capture sediment from the nearby road before it enters the ditch.
completed project: drop drain
completed: side wall connected to ditch head wall
before
before: site
restored site
before
finished project included resurfacing part of the existing Sage Trail
moving rock with the excavator
construction
in progress
in progress