An existing traffic island was retrofitted to become a bio-infiltration BMP. The facility intercepts flows that would normally be captured by inlets and delivered through culverts to a dry detention basin without a chance to cleanse or infiltrate the stormwater runoff. Designed for the smaller storms (0 – 1.5 inches), the runoff infiltrates thereby reducing downstream stormwater volumes, stream bank erosion, and non-point source pollution to the headwaters of the Darby Creek. The advantage of this type of facility is the capture and infiltration of over 90% of the yearly rainfall. This will significantly reduce stream bank erosion and protect low baseflows during times of drought. As all the stormwater for these rainfalls is infiltrated, there is NO pollutant input to the headwaters for smaller storms.