Retrofitting Low Impact Development (LID) for Stormwater at … · 2015-08-12 · 2016 – 2036:...
Transcript of Retrofitting Low Impact Development (LID) for Stormwater at … · 2015-08-12 · 2016 – 2036:...
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Retrofitting Low Impact Development (LID) for Stormwater at Sacramento State
City of SacramentoSacramento State Facilities Management
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Project Background – Campus Storm Drain System
Drain Inlet - Campus Storm Drain Discharges into American River
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Project Background – American River
Outfall – Guy West Bridge Upstream Sample
Discharge Sample
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Project Background
1. Phase II Stormwater Permit
Requires Implementation of Low Impact Development
Kevin Perry - Urban Rain Design
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Project Background
1. Proposition 84 – Stormwater Grant Program
2. State Water Resources Control Board
3. Objectives:a) Prevent stormwater contamination of rivers,
lakes, and streams.b) Implement requirements of stormwater
permitsc) Implement Low Impact Development (LID)d) Monitoring and Education Outreach
City of Kirkland, WA
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Project Collaboration
State Water Resources Control Board
City of Sacramento
Office of Water Programs @ Sacramento State/UEI
Sacramento State Facilities Management
Design and Construction Contractors
Project ManagementDesign and Construction OversightStormwater Monitoring and EvaluationPublic Education and Outreach
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Project Funding - Summary
Project Total - $3.3MA. Prop 84 - $2.6MB. Local Match - $0.7M
i. Sacramento State FM - $500Kii. City of Sacramento - $112Kiii. Office of Water Programs – $31Kiv. Dry Creek Conservancy - $30Kv. Local LID Expertise - $25Kvi. County of Sacramento - $1K
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Project Benefits
1. Meet Stormwater Permit Requirements
2. Faculty/Student Involvement
3. High Visibility4. Protects the American
River5. Replenish Irrigation Wells6. Demonstration and
Training Facility for Northern CA
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Low Impact Development (LID)
1. Mimic Natural Hydrology (Infiltrate)
2. Protect Receiving Waters3. Reduce Flooding4. Groundwater Recharge5. Opportunities for Reuse
US EPA
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Types of Low Impact Development Devices
1. Bioretention Planters2. Rain Gardens3. Bioswales4. Porous Pavement5. Biostrips6. Road Narrowing (reduce impervious area)7. Cisterns or Rain Barrels8. Tree Box Filters9. Constructed Wetlands10. Green Roofs
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Rain Garden Profile and Function
11
Surface depth 6”
Amended Soil depth 18”
Native Soil
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Rain Gardens
Harford County, MDUS EPA
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Bioswale - Profile
Native Soil
6” heightAmended Soil: 6” – 18”
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Bioswales
Lake County, ILCaltrans
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Bioretention Profile and Function
15
Surface depth 6”
Amended Soil depth 18”
Underdrain storage depth 12”
Elevated Underdrain Discharge
Native soil
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Bioretention – Parking Lots
Scott Taylor, PERBF Consulting
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Bioretention – Streets
Scott Taylor, PERBF Consulting
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Porous Pavement - Profile
Native Soil
Porous Pavement
Gravel Filter Course
4”
12”
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Porous Pavement
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Project Location
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Campus Layout
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Ongoing LID Construction
1. 8 Bioretention Planters
2. 8 Rain Gardens (Street Side and Low Lying Lawn Drain Inlets)
3. 3 Rooftop Disconnects with Rain Gardens
4. 2 Bioswales
5. 1 Green Street (Porous Pavement and 6-10 Rain Gardens)
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Design Goals
Enhance InfiltrationA. Silty sands over gravels
B. No devices lined
C. 14 acre-feet per year infiltrated or treated
D. 13.2 acre-feet per year - infiltration alone
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Design Goals – Large Tributary Areas
Parking Lot 7 (South): Bioretention Planters and Bioswale
1.64 Acres1.82 Acres
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Design Challenges
1. Fitting into the existing drainage systema. Horizontalb. Vertical
2. Negotiating the removal of parking stalls3. Fitting into existing topography4. Existing infrastructure5. Interactions with buildings6. Subsurface soil?7. Timing8. Compatibility with Campus Master Plan
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LID Device MonitoringPerformance Monitoring
Evaluation and Reporting
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Education and Outreach
1. Signage, Website, Tours(Mobile App)
2. Brochures
3. Conferences and Papers
4. LID Conference
5. Campus Presentations
6. Public Affairs
Kitsap Conservation District Green Side Up
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Operation and Maintenance
1. Weed, Litter, and Debris Removal (As needed)
2. Infiltration Inspections (Runoff Infiltrating?) (Twice a year during storms)
3. Low or no Infiltration? Remove and Replace Topsoil (~ 5 to 10 years)
4. Use integrated pest management (IPM) techniques to minimize use of fertilizers, pesticides and herbicides. (As needed)
5. Inspect (~ 2 times per year – including once at end of wet season) for erosion and sediment buildup. Correct problems as needed.
Kevin PerryUrban Rain Design
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Project Funding - Summary
Project Total - $3.3MA. Project Admin: $0.2M
B. Planning and Design: $0.5M
C. Construction: $2.1M
D. Monitoring and Reporting: $0.3M
E. Education and Outreach: $0.3M
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Project Timeline
Spring 2015: Completed Design
Summer and Fall 2015: Construction
2015/2016: Post-Construction Monitoring
January 2017: Final Report
2016 – 2036: O&M
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Breaking Ground
• Next Year? Construction Challenges
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Funding for this project has been provided in full or in part through an agreement with the State Water Resources Control Board. The contents of this document do not necessarily reflect the views and policies of the State Water Resources Control Board, nor does mention of trade names or commercial products constitute endorsement or recommendation for us.
Project Funded by SWRCB