Drainage Bioswale Planter Detail
BENEFITS OF BIORETENTION BEDS BENEFITS OF PROPOSED BULB-OUTS
VIEW FROM SIDEWALK VIEW FROM STREET 1 WATER QUALITY IMPROVEMENT (STD. 607) (STD. 607) “...protect water quality by managing stormwater PROPOSED PLANTINGS TO as close to its source as possible via infiltration into BE APPROVED BY CITY SIDEWALK SIDE CURB OPENINGS soils, evapotranspiration via plants, and/or harvesting FOR DRAINAGE (SEE STD. 607 BIOSWALE CONCRETE CURB, 20’ Min. FOR DIMENSIONS AND SPACING) PERPENDICULAR TO STREET for use. These techniques reduce the opportunity WITH NO CURB CUTS. ALL for stormwater to run off, entrain pollutants, and SIDEWALK 4'-8 1/2" BIOSWALE (5'-6" MIN) EDGES TO BE TOOLED WITH R-1" discharge pollutants to waters.” VARIES 4'-6" (MIN) STREET SIDE CURB OPENINGS EXPANSION JOINT FOR DRAINAGE (SEE STD. 607 1 FOR DIMENSIONS AND SPACING) 2" PREMOLDED - United States EPA BITUMINOUS FILLED SEE STD. 302 EXISTING FOR STREET ROADWAY 2 2% SLOPE MAX 6" PATCH DETAIL TOPCOAT REDUCE PEAK DISCHARGE RATE 6" STREET 12"
The natural processes of Infiltration and storage CONCRETE reduce runoff volumes and attenuates peak flows. SIDEWALK 2' MIN SEE STD. 303 Meanwhile, biological and chemical reactions occur in the mulch, soil matrix, and root zone. Stormwater BIO-RETENTION SOIL MIX 1' MIN (VARIES PER is filtered through vegetation and soil. SOIL CONDITIONS) 1 2" MULCH SLOW VEHICLES DOWN BY NARROWING THE STREET GEOTEXTILE FABRIC BARRIER 2' OVERLAP IMPERVIOUS LINER AS 2 3 REQUIRED BY CITY PROTECT ON-STREET PARKING AESTHETICALLY PLEASING (SEE NOTES) Bioretention is an aesthetically pleasing green street 1½" - ¾" WASHED STONE DRAINAGE BED. 3 ADDITIONAL BUFFER FOR PEDESTRIAN SAFETY strategy that can be easily incorporated into different 4" PERFORATED UNDERDRAIN AS landscapes. A variety of vegetation can also be used, NOTE: SEE BIOSWALE REQUIRED (SEE NOTES) including grass, perennial plants, shrubs, and trees. NOTES ON STD. 608 4 STORMWATER / AESTHETIC BENEFITS Source: Decatur Engineering Standard Details
EXAMPLES PLANTS FOR CONSIDERATION EXAMPLES DECATUR ENGINEERING STANDARD DETAILS
DRAFT DATE: BIOSWALE PLANTER DETAIL 07/18/2014Grass & Sedges STANDARD NO: SCALE: NONE 606
DRAFT October 2014 Engineering Standard Details | Decatur, Georgia E-27 Pennsylvania Sedge Woolgrass
https://www.asla.org/bioswales.aspx https://kingcountywtd.com/2017/07/07/roadside-rain-garden-project-earns-local-civil-engineering-honors/ Fringed Sedge Broomsedge Forb / Perennials
Wild Blue Indigo Dwarf Yaupon Holly
https://www.djc.com/news/co/12107649.html Boneset Purple Coneflower Shrubs
Florida Leucothoe Wax Myrtle
https://www.watershedcouncil.org/bioswale.html https://artfulrainwaterdesign.psu.edu/project/ne-siskiyou-green-street Fothergilla Virginia Sweetspire *Concept use only, please refer to the final construction document. Source: GDOT Advanced Design Workshop: Bioretention Basin *Concept use only, please refer to the final construction document.
BENEFITS OF BIORETENTION KNOWLEDGE BOARD
X X X X BEDS X / BULB-OUTS