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Spring Lake - A Case Study for Green Infrastructure & LID (part 1)

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An in-depth look into a low impact development case study.

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Spring Lake - A Case Study for Green Infrastructure & LID (part 1)

  1. 1. SPRING LAKE PARK: A Case Study for Green Infrastructure & LID
  2. 2. Jim Theiler James.Theiler@cityofomaha.org City of Omaha Environmental Services Manager Omaha CSO Program & Spring Lake Park An example of what is possible…
  3. 3. Challenges Facing Omaha  Meet the increasing requirements of the Federal Clean Water Act  Balancing the following needs:  Regulatory compliance  Economic affordability  Community acceptance Economic Affordability Community Acceptance Regulatory Compliance CSO Solutions
  4. 4. CSO is not a sewer separation program, it is not the City’s sewer overhaul program *When Omaha is ‘done’ separating the sewers as a part of CSO, it will have separated less than 20% of is combined sewer system*
  5. 5. CSO is a Public Health Program that must meet federal law that requires us to reduce the amount of human sewage and disease causing bacteria that enter the rivers and streams.
  6. 6. Evolution of the CSO Program  2009 - Original CSO LTCP submitted to NDEQ  2014 - Revised CSO LTCP submitted  Both LTCPs generally rely on ‘gray infrastructure’  Need to manage 8 billion gallons of CSO annually  Assumed there was little “green” in the original LTCP…
  7. 7. Evolution of the CSO Program  Green Infrastructure was part of the program from the start... may not have called it “green”  Use water as a resource instead of a waste product  Each capital project explores GI opportunities  Committed to working with private entities & all City Departments, including Parks Department  Parks in Omaha provide a unique opportunity for GI, projects so far include:
  8. 8. CSO GI in Omaha Parks A great collaboration…  Elmwood Park - 2012  Spring Lake Park - 2016  Adams Park - 2016  Field Club Trail, Vinton-2016  Albright Park (Gilmore) - Construction  Fontanelle Park – Just started  Hanscom Park – 90% design  Hitchcock Park –95% design  Others being explored Non-park GI  Country Club - 2013  SOIA Lift Station – 2014  24th Street - 2015
  9. 9. Elmwood Park 29 acres of Aksarben neighborhood routed through park w/7 weirs, bioswale & bioretention
  10. 10. Adams Park Wetlands Large scale GI taking on 277 acres of urban runoff with 77 acre-feet of detention volue
  11. 11. Fontanelle Park Construction started March 2017; utilizing former golf course & existing lagoon
  12. 12. Hanscom Park Oldest Omaha park; improving existing pond & embracing water through the park
  13. 13. Welcome to Spring Lake Park!
  14. 14. Initial Grey Solution vs Final GI Plan  Storm pipe through park vs 20 GI elements  Multiple benefits w/GI
  15. 15. Overview of Spring Lake Park
  16. 16. Overview of Spring Lake Park 2 phases to the project JohnFKennedyExpy
  17. 17. Funding  Saved approx. $5 million by utilizing GI  Grants from Nebraska Environmental Trust & Nebraska Game and Parks commission totaled $1.3 million  Overall, the project cost the City $10.4 million dollars, with funding paid for from the Sewer Revenue Fund
  18. 18. Why this project…  This was not the City’s idea, this was the neighborhood’s idea.  My boss at the time, Marty Grate, said that the City needed a ‘signature project’ that helped give back to the community something tangible, to help them see what they are paying for  The Public Works Department asked permission from the Parks Department to use Spring Lake as that project.
  19. 19. Janet Bonet South Omaha Resident Spring Lake Park Team A Little History and Residents Perspective
  20. 20. Spring Lake Park Team President Janet Bonet Vice President Jason Rose Secretary John Bonet Treasurer Callyann Casteel Board Members James Bonet Jean Incontro Gary Hansum
  21. 21. Keeping Nature in the City
  22. 22. Spring Lake Neighborhood Spring Lake School Henry Doorly Zoo Rosenblatt Stadium Spring Lake Golf Course South High School Suicide Hill / Baseball Field County Treasurer Office Current Swimming Pool Old Ball field 1930’s Rubble Fill Small Dam
  23. 23. Tree Frog aka Cricket Frog
  24. 24. Dragonfly Swarm August 2010
  25. 25. Sunflower and Honey Bee
  26. 26. Deer
  27. 27. Blue Grosbeak Chipping Sparrow
  28. 28. Motivation for a community to take action
  29. 29. The Spark 1994 Dedication of new playground
  30. 30. 1960’s Landfill Site part of the park The playground, parking, and picnic shelter (1994) are in the background. The “dead spot”, noticed in 1995, is in the foreground. 150 ppm salt
  31. 31. Somebody should do something
  32. 32. Heritage
  33. 33.  1994 – SLPT BLOSSOMS DRIVES EFFORT TO “PUT THE LAKE BACK IN SPRING LAKE PARK”  1995 – FEDERAL MANDATE SEWER SEPARATION  1999 – SLPT & KSU COMMUNITY VISIONING  2000 – COMPLIANCE ENFORCEMENT NOTICE  2001 – SLPT CONCEPT PRESENTED TO MAYOR  2002 – OMAHA GEARS UP FOR CSO PROGRAM  2005 – SLPT AMONG COMMUNITY STAKEHOLDERS ON CSO STEERING COMMITTEE Moving toward doing something
  34. 34. Why do it? It has been said:  It’ll never happen, City does not care about South O  It’s just a dump anyway, just fill it in  I’ll be dead before those trees make shade  I’m leaving the neighborhood why should I care  The city doesn’t care about our parks why should I  The kids today will just mess it up so why try  It’ll cost too much  Nobody will appreciate all that work  Who the heck cares  Who is going to take care of it when it’s done
  35. 35. Positive Partnerships  Broader-than-usual  Out-of-the-box  Creative  Project-specific  Mutually beneficial  Truly collaborative  Uniquely innovative  Community inclusive In order to be poised to seize the opportunities presented by changes in the broader trends:  Community needs/wants  Government mandates/budgets  NGO funding shifts  Social/environmental conditions  Engineering & design innovations  Funding sources
  36. 36.  Keep Omaha Beautiful  Douglas County Health Dept  Nebraska Dept Environmental Quality  Papio Missouri Natural Resources District  City Depts. – Parks, Planning, Public Works  Jacobson Helgoth Consultants / Tetra Tech  Nebraska Wildlife Federation  Audubon Society & Sierra Club  Groundwater Guardian Program  Society for Ecological Restoration  Nebraska Statewide Arboretum  Joslyn Institute for Sustainable Communities  EPA TOSC / Kansas State Univ  UNL Water Resources Program  KSU Urban Design in School of Architecture  National Parks Service  Center for Health, Environment & Justice Advisory Team & Expert Resources
  37. 37. The Other Kind of Experts  Neighbors – residents and businesses  History Sources  Youth / Schools  Community Groups  Potential Park Visitors 39 SLNA Visioning Session with KSU Team
  38. 38. Inclusive 40
  39. 39. The condition of our parks says a lot about our city, its government, and its people.
  40. 40. Environmental Health Reflects and Impacts Community Health
  41. 41. Small seep area NW of pond, south of F Street --- 1999
  42. 42. SLPT’s Plan October 2001 at The Mayor’s Office
  43. 43. 2014 - looking north from 14th & J 48
  44. 44. Summer 2015, 14th & J St. No outlet
  45. 45. Old Dam - South of F Street - 2000 with KSU Urban Design Class .
  46. 46. Spring below Swimming Pool road in 2000 Is now underwater feeding the Lake
  47. 47. Of Miracles and Mandates: Maximizing Opportunities for Partnership Building By Janet Bonet Neighborhood Activist South Omaha, Nebraska NUSA Houston, TX May 22, 2015 EPA – Region 7 Technical Outreach Services to Communities at Kansas State University
  48. 48. CSO!
  49. 49. CSO’s Community Liaison Another rare bird
  50. 50. Keep Partners and Public Informed and Involved
  51. 51. Spring 2016 Public Tour
  52. 52. Big Muddy Workshop 2015 Renderings of Lake Concept
  53. 53. Summer 2016
  54. 54. Annual Neighborhood Clean-up 2015
  55. 55. 2016 Annual Park Spring Clean Up The year of Garbage, Goats & Guns
  56. 56. Thank you!
  57. 57. Pat Slaven, PLA, ASLA City of Omaha Park Planner Omaha Parks and the CSO Program Project Role: Department Liaison between the Parks Department and everyone else
  58. 58. Return the “lake” to Spring Lake Park Park Goals: Respect History of the Park
  59. 59. Attract more and a greater diversity of wildlife Park Goals: Wildlife Habitat
  60. 60. Provide more and varied recreation opportunities in the Park Park Goals: Recreation
  61. 61. Don’t increase maintenance for park maintenance and golf course staff Park Goals: Low Maintenance
  62. 62. Making sure we’re all swimming in the same direction Parks and the Project Team Park Planner Responsibilities on CSO Projects:  Make sure everyone understands Parks Department goals for the project  Attend regular meetings with Public Works, consultants, project management team  Attend onsite meetings to discuss issues and solutions  Review and comment on progress plans in terms of park goals  Enforce Parks Dept. tree mitigation requirements  Coordinate with other park entities, i.e. golf course staff, park maintenance staff, etc. and communicate their concerns to the project team
  63. 63. Park Tree Mitigation – Individual Trees
  64. 64. (#sq ft canopy/500) x 2 Mitigation – Continuous Canopy with Understory
  65. 65.  Will create maintenance nightmare, wet areas  Will create places to lose balls, slowing down play  Will interfere with play in general Golf Courses and Green Infrastructure
  66. 66.  G.I. Team met onsite Bob and golf course staff  Discussed concerns  Developed design to address concerns Golf Courses and Green Infrastructure
  67. 67.  Parks to mow, pick up trash  Public Works to hire or contract out for special crews to maintain green infrastructure components Park Maintenance
  68. 68. Educational Signage  Describes history of the spring lake, the CSO project lake reconstruction and the benefits of putting the lake back into Spring Lake Park.  Bilingual text makes sign accessible to all citizens
  69. 69. Speakers discuss the key design components of the project
  70. 70. Emily M. Holtzclaw, PE CH2M Senior Project Manager Permits and Compliance
  71. 71. Permitting  USACE 404 NW 27  Solid Waste Removal  Lead in Soils  Low Hazard Dam  408 Levee Permit  Dewatering  PCSWMP  NPDES CSW/Grading
  72. 72. Compliance Highlights  Regulatory Coordination  Early (Jurisdiction)  Consistent  Onsite Mitigation  Minimize Impacts  Maintaining Seeps  Design Tweaks  Annual Monitoring  Breach Zone  2017 NW permits
  73. 73. Hydrology & Hydraulic Design Rocky J Keehn, PE SEH Senior Water Resources Engineer Project Role: Lead Water Resources Engineer for Consultant Team
  74. 74. The Modeling Challenge Required to Design for:  Green Infrastructure,  10-year,  100-year,  Dam Break – PMP and  natural seepage flows
  75. 75. Water Quality -Cascading Planes Lots of models use this concept. Aids in showing Note: areas broken into direct impervious and indirect (includes pervious). For indirect pervious CN was from 74 in urban yard areas and 61 in undisturbed areas HydroCAD
  76. 76. Water Quality – First Flush Systems HydroCAD Inlet 1st Flush Large Flows 1st Flush Pond Emergency Outlet Natural Downstream Pond Primary Outlet
  77. 77. Water Quality – Manhole Spillway HydroCAD Inlet 1st Flush Large Flows 1st Flush Pond Emergency Outlet Natural Spillway Primary Outlet Infiltration Pond Downstream, no pipes
  78. 78. New Conveyance Channel HydroCAD 100yr – cross entire valley 10yr – about 20 feet wide Vegetated About 1 foot incised
  79. 79. Detention to protect channel #5 Primary outlet to channel #4 -Gate Control to adjust flows from pond HydroCAD #2 - Location Primary Overflow -Armored #3 - Location Emergency Overflow – Access Road #1 Pond outlet to Gate Control MH Detention Pond
  80. 80. Constructed Wetland – final protection Multiple depths…various vegetation Stop Logs Control water elevation which allow “tweaking” to make sure vegetation as planned is established Stop Logs HydroCAD 7 area contribution to wetland
  81. 81. Extend Dry Basin Outlet Spring Flow Lake Drawdown pipe MH with gate Lake control structure, main overflow  Emergency “F” Street dam overflow. Lake Outlet Complex Outlet Under “F” Street Extend Dry Basin Overflow Dam Design Floods all way up north valley, 100 year all under water including wetland, 10-year trail just under water
  82. 82. Final Hydraulic Structures South Side “F” Street North Side “F” Street
  83. 83. Value of modeling…something not working…design or construction related? Emergency overflow, showing signs of flow and erosion Primary overflow Cone Structure Emergency overflow designed for 10-year. Primary: 1070.71, Emergency 1071.50, 10-year 1071.24. Road OK Emergency overlow working too often. Check. As-built Prim: 1071.24, 10-year now 1071.58 Overtops road! Model explains what might be the problem...shows a very sensitive design.
  84. 84. Treatment Train.. SAFL Baffle in residential neighborhood First Flush Diversion Manhole Extended Dry Detention Basin Dry Detention Facility Meandering Channel with Boulder Drops Constructed Wetland Flat Sloped Channel Spring Lake Combined Pipe now Storm Pipe Missouri River
  85. 85. Conveyance Train Dry Detention Pond and gated outlet pipe Meandering Channel with Boulder Drops Constructed Wetland and outlet pipe under trail to Lake Energy Dissipation Structure to “Natural” Channel Spring Lake and pipe under “F” Street Low flow culvert and “Texas Crossing” to wetland Roof/impervious surface near houses Though the yards Down the Street Storm pipes through the park
  86. 86. Replace pipes (grey) with surface flow (green) to reduce project cost Dry Detention Pond and gated outlet pipe Meandering Channel with Boulder Drops Constructed Wetland and outlet pipe under trail to Lake Energy Dissipation Structure to “Natural” Channel Spring Lake and pipe under “F” Street Low flow culvert and “Texas Crossing” to wetland Green infrastructure reduced cost by $5 million
  87. 87. Questions . . . Or time for a break!

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