Performance Standards Workshop Midwest Case Studies

Transcription

1 Performance Standards Workshop Midwest Case Studies Permeable Paving Permeable Paving Bioretention 1

2 Bioretention Bioretention Bioretention Bioretention 2

3 Green Roof Portland Stormwater Management Manual 3

4 DROUGHT TOLERANT VEG WIND PROTECTION BLANKET GROWING MEDUIM DRAINAGE MEDIUM DRAINAGE MEDIA SEPARATOR WATER PROOFING & ROOT BARRIER WHERE DOES THE RAINWATER GO? 1.) PLANT ZONE UPTAKE 2.) FLOW THROUGH DRAINAGE MEDIA 3.) EVAPOTRANSPIRATION +/- 70% (ZINCO) 4.) UNDERFLOW TO CISTERN, RAINWATER GARDEN, URBAN STORM SEWER / 30% Conventional Naturalized Drainage Conservation GREEN ROOF CROSS SECTION Naturalized Drainage Green vs Gray Economic Factors Construction Cost Site Utilization Marketing/Aesthetics Maintenance/Longevity 4

5 BMP Impacts on Cost Fox River Water Reclamation District BMP Construction Cost Site Utilization Marketing/ Aesthetics Maintenance/ Longevity Green Roof Permeable Pavers 0/ Bioretention +/ Native Landscapes Natural Drainage Positive Impact, - Negative Impact Permeable paving Infiltration Trench Bioretention Fox River Water Reclamation District 5

6 FRWRD Cost Comparison Gray Infrastructure Asphalt Paving Storm sewer Detention Wetland permitting $153,000 Green Infrastructure Permeable paving Bioretention $140,000 Carol Stream Park District: LEED Silver Recreation Center Carol Stream Recreation Center Integrated Stormwater & Landscape Design 6

7 Life Cycle Cost Analysis AMCOL Headquarters 7

8 AMCOL Headquarters Hoffman Estates, IL 8

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10 Summary of Results AMCOL Headquarters (7.4 acres) Pre-Project Post-Project % Reduction Threshold Event Year Event (3.04" rain) Runoff Volume (inches) % Peak Flow (cfs) % 10-Year Event (4.47" rain) Runoff Volume (inches) % Peak Flow (cfs) % 100-Year Event (7.58" rain) Runoff Volume (inches) % Peak Flow (cfs) % 10

11 Woodlawn - Chicago 11

12 Summary of Results Woodlawn (0.9 acres) Pre-Project Post-Project % Reduction Threshold Event 0.05" > 5.6" - 2-Year Event Runoff Volume (inches) % Peak Flow (cfs) % 10-Year Event Runoff Volume (inches) % Peak Flow (cfs) % 100-Year Event Runoff Volume (inches) % Peak Flow (cfs) % Aurora Middle School 12

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14 Summary of Results Aurora Middle School Met Kane County Stormwater Requirements 0.75-inch Retention Requirement 100-year Release Rate = 0.10 cfs/acre 14

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17 Carbon Cliff Permeable Streets 17

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19 2-Year Event Pond Elevation CFS 17.1 CFS Permeable Paving Flows Storm Sewer Flows 10-Year Event Pond Elevation CFS 45.3 CFS Permeable Paving Flows Storm Sewer Flows STATE STREET 2.9 CFS 13.0 CFS STATE STREET 13.2 CFS 31.7 CFS 1 st STREET 0.97 CFS 11.1 CFS 1 st STREET 6.1 CFS 26.6 CFS 2 nd STREET 2 nd STREET 0.31 CFS 5.4 CFS 3 rd STREET 0.64 CFS 7.4 CFS 2.3 CFS 12.9 CFS 3 rd STREET 3.9 CFS 17.6 CFS 4 th STREET 4 th STREET 5 th STREET 5 th STREET 6 th STREET 6 th STREET 100-Year Event POND ELEVATION CFS CFS Permeable Paving Flows Storm Sewer Flows STATE STREET 40.2 CFS 79.3 CFS 1 st STREET 21.6 CFS 64.4 CFS 2 nd STREET 3.1 CFS 9.3 CFS 3 rd STREET 13.4 CFS 42.3 CFS 4 th STREET 5 th STREET 6 th STREET 19

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21 Summary of Results Carbon Cliff Green Streets Phase 2 (10.4 acres) Pre-Project Post-Project % Reduction Threshold Event 0.05" 1.10" - 2-Year Event (2.91" rain) Runoff Volume (inches) % Peak Flow (cfs) % 10-Year Event (4.31" rain) Runoff Volume (inches) % Peak Flow (cfs) % 100-Year Event (6.36" rain) Runoff Volume (inches) % Peak Flow (cfs) % West Union Iowa s Green Street Pilot Project Green Pilot Streetscape Project A Sustainable Vision for West Union The City of West Union Main Street West Union Iowa Department of Economic Development Green Infrastructure for Revitalization 21

22 West Union, Iowa 22

23 Summary of Results Pre-Project Post-Project % Reduction Threshold Event 0.05" 1" - 2-Year Event (2.91" rain) Runoff Volume (inches) % Peak Flow (cfs) % 10-Year Event (4.31" rain) Runoff Volume (inches) % Peak Flow (cfs) % 100-Year Event (6.36" rain) Runoff Volume (inches) % Peak Flow (cfs) % Questions? 23