1. energy PUBLIC Running Water: Effective Stormwater Quality Practices Tracy Warner, Municipal Engineer for Ames, IA Josh Shields, Landscape Architect with Bolton & Menk, Inc. Matt Ferrier, Civil Engineer with Bolton & Menk, Inc. reduce LONGEVITY ENVIRONMENT BIORETENTION HEALTH PARTNERSHIPS ACCOUNTABILITY PERMEABLE LOCAL SMART GROWTH stormwater COMMUNITIES ecological quality water quality practices social education efficiency rain gardens soil quality restoration

2. Community Flooding [2010]

3. Traditional Stormwater Model ­ Collect + Move runoff as fast as possible ­ Curb and gutter systems collect + transport runoff quickly + effectively to receiving streams ­ Out of sight → out of mind

4. ­ Urban Runoff Toxicity  Solids  Oxygen-demanding substances  Nitrogen and Phosphorus  Pathogens  Petroleum hydrocarbons  Metals  Synthetic organics ­ Increased runoff velocities ­ Increased erosion ­ Decreased Aquatic Wildlife Habitat Traditional Stormwater Model

5. ­ Public Perception  Native plants look ‘weedy’  Not as manicured as lawn  Attract insects and snakes  How do you maintain it? + Which plants are native?  Installation costs are expensive Factors Impacting Lack of Change

6. ­ Municipal Concerns  Long-term Maintenance requirements  New & Innovative → Unknown  Best Management Practices (BMPs) may fall outside of current City Codes  Hard to accommodate installation & enforce long-term function/look Factors Impacting Lack of Change

7. Existing Site Conditions ­ City Hall Campus Project | Impervious Surface 5 th Street 6 th Street Grand Avenue Clark Avenue

8. Existing Site Conditions ­ City Hall Campus Project | Lawn/Landscape Surface 5 th Street 6 th Street Grand Avenue Clark Avenue

9. Modeling the Way [social] ­ Provide Examples for Developers ­ Provides Examples for Property Owners ­ Opportunity to monitor various BMPs ­ Public Education

10. ­ Showcase Ames Post-Construction Stormwater Ordinance  Iowa Stormwater Management Manual  Retain more runoff on site  Treat runoff prior to release  Consider pre-settlement conditions during Design Modeling the Way [technical]

11. ­ Channel Protection  1 year 24 hour event: 2.67”  Release at pre-development rate  Must detain for minimum 24 hour period ­ Water Quality Protection  1.25” storm event  90% of storm events are less than this  “first flush”  Treat + Retain on site Modeling the Way [technical]

12. ­ Overbank Flood Protection  5 year 24 hour event: 3.81”  Restrict post-development peak discharge rate ­ Extreme Flood Protection  10 year 24 hour event: 4.46”  100 year 24 hour event: 7.12”  Provide safe conveyance of excess runoff Modeling the Way [technical]

13. City Hall Campus sub-Watersheds

14. Master Plan Concept

16. Best Management Practices Low-Grow Native Turf + Soil Quality Restoration Native Plantings + Soil Quality Restoration Native Seeding + Soil Quality Restoration

17. Best Management Practices Permeable PavingBioretention BasinSoil Quality Restoration + Reinforced Native Turf

18. Stormwater Calculations

19. ­ Landscape Codes  Update to include BMPs  Consider relation to adjacent parking lots and streets  Require sustainability accommodations ­ Effects on existing infrastructure  Pavement condition and retrofits  Subsurface drainage  Existing stormwater pipes Internal Discussions [design]

20. ­ Iowa Dept. of Agriculture & Land Stewardship (IDALS)  City received an Urban Water Quality Demonstration Project Grant for $100,000 ­ Iowa State Revolving Fund (SRF) ~ sponsored projects  City could receive up to $374,441 from eligible projects ­ City General Fund  City obligated $500,000 towards reconstruction of the West Parking Lot Funding Opportunities

21. ­ West Parking Lot Non-BMPs: $383,520.00 ­ West Parking Lot BMPs: $526,101.50 ­ West Parking Lot Bioretention Cell: $123,185.00 ­ East Clark BMP: $51,966.00 ­ West Clark BMPs: $88,525.00 ­ North Lawn BMPs: $9,372.00 ­ South Lawn BMPs: $16,297.00 ­ Total : $1.2Million  IDALS $100,000.00  SRF $374,441.00  City General Fund: $500,000.00 Overall Cost Breakdown

22. Thank You [contact information] Tracy Warner, PE City of Ames Municipal Engineer (515) 239-5160 Twarner@city.ames.ia.us Visit cityofames.org for more information on the City of Ames’ efforts toward greater sustainability Josh Shields, PLA Bolton & Menk, Inc. Landscape Architect (515) 233-6100 Joshsh@Bolton-menk.com Visit bolton-menk.com for more information on Bolton & Menk and our Municipal & Landscape Architecture Services Matt Ferrier, PE Bolton & Menk, Inc. Civil Engineer (515) 233-6100 Mferrier@Bolton-menk.com Visit bolton-menk.com for more information on Bolton & Menk and our Municipal Services