Module 5: Bioretention Design Specs Details - Melanie Mills

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• Facility Type – planter! Standard Details! – sloped sided! • Elements related to facility – walls! – curb inlets! – overflows! – check dams!
Standard Details! BIORETENTION DESIGN NOTES 1. Overflow structure required for in-line systems without overflow bypass, Detail 140. 2. Provide spot elevations on civil plans (TBSM, OE, GIE, IE). See Detail 120. 3. Edge condition will vary for new and retrofit projects. Curb details may be modified for project by civil and geotechnical engineers. 4. If check dams are needed, see Concrete Check Dam Detail 131. 5. If Caltrans Class 2 Permeable is not available, substitute Class 3 Permeable with an overlying 3" deep layer of 3/4" (No. 4) open-graded aggregate. 6. Bioretention Soil Media (BSM) specification per BASMAA Soils for Biotreatment or Bioretention Facilities. 7. Plant Selection per LIDI Plant Guidance for Bioretention Areas Technical Assistance Memo (TAM). 8. Mulch (optional) per LIDI Plant Guidance for Bioretention Areas TAM. Grading to allow for specified soil and mulch depths while achieving finished elevations per civil plans. 9. Locate energy dissipation cobble only as specified in inlet details - avoid decorative use. LOW IMPACT DEVELOPMENT STORMWATER MANAGEMENT STANDARD DETAILS Municipality Department Name Bioretention Area Planter CONSTRUCTION NOTES 1. Scarify subgrade before installing bioretention area aggregate and BSM. 2. Compact each 6" lift of BSM with landscape roller or by lightly wetting. If wetting, allow to dry overnight before planting. 3. Never work within bioretention area limits during rain or under wet conditions. 4. Keep all heavy machinery outside bioretention area limits. detail number 100
Page 1 and 2: Module 5: Bioretention Design Specs
Page 3 and 4: Bioretention Area Design Guidance S
Page 5: Design Specifications! • Facility
Page 9 and 10: 100 Bioretention w/ Flat Bottom (Pl
Page 11 and 12: • 3:1 max - needs shoulder! • 4
Page 13 and 14: Facility Elevations! • Overflow e
Page 15 and 16: Bioretention w/ Underdrain Side Slo
Page 17 and 18: Edge Infrastructure! BIORETENTION D
Page 19 and 20: Curb Cut Inlets for Planters! • I
Page 21 and 22: Curb Cut Inlets for Sloped Sides! C
Page 23 and 24: • Use it for energy dissipation -
Page 25 and 26: Gravel Check Dam! • Mild longitud
Page 27 and 28: Concrete Check Dams! • Work w/ st
Page 29 and 30: Overflow Structure w/ Beehive Grate
Page 31 and 32: Location of Overflow! • Not adjac
Page 33 and 34: Aggregate! • Optional use - per p
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Module 5: Bioretention Design Specs Details - Melanie Mills

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