NTS Basin #4 & Bike Trail – Irvine, CA

This project consisted of installing a natural treatment system basin for stormwater with an adjacent bike trail. The NTS basin was cleared and the existing drainage structures were modified to the proposed improvements with the installation of a low-flow channel and sediment traps. The in-flow storm drain was fitted with a new catch basin with a slide gate and a headwall at the basin entry area.

A new staircase and three concrete ramps were installed for pedestrian and vehicular access. A new irrigation system was installed in the basin area for landscaping wetland vegetation. A cable fence was installed around the basin and access gates. Refrigerated sampling units with sampling tubes were placed in-flow and out-flow to test for water quality.

Adjacent to the basin we installed an asphalt access road, a concrete bike path with trail lighting, and a turf block. New landscaping and irrigation were installed in the parkway along the bike trail.