A 2016 BGE Green Grant application request for the Lincoln Drive Rain Garden project has been approved for $5,000. The Lincoln Drive area is at the headwaters of Spa Creek and covered by nearly 90% impervious surface. Industrial and road runoff is flowing directly into Spa Creek. The rain garden will slow the flow of stormwater and contamination into Spa Creek.
Here is a recap of the work to be done:
- Total rehab of planting area, to include removing weeds, plants, and destroyed trees. Salvage what flowering perennials plants you can identifiable e.g., Cone Flower. Leave two stems of the volunteer sycamore tree that has sprouted.
- Clean - sweep up the area in front of biocell, e.g., the loose gravel and silt deposits.
- Excavate as much silt as possible, rototill as much weed root as possible, and level out ponding area, cover in 2 inch light layer hardwood mulch.
- Rework areas around the two storm drain overflows, remove silt, replace rock, etc. The drains should be about 9 inches above the base soil. Clear around white PVC inspection pipe.
- Remove as much rock as feasible from intake diaphragm and haul silt offsite, replace filter cloth and add back the washed rock and new rock as required to bring up to street level.
- Resecure bollards and replace safety reflectors, possibly add some safety markings per City code. (ala Cheston Ave. street end)
- Add curb diversions to direct gutter runoff into biocell and not letting it get around the edges.
- Excavate 12 inches, between sidewalk and wall, install filter cloth, and 5-8 inch River Jack.
- All replacement planting will be done in the fall.