1. OREGON IDAHO WYOMING COLORADO NEVADA NEW MEXICO TEXAS UTAH ARIZONA CALIFORNIA US Army Corps of Engineers BUILDING STRONG ® And Taking Care Of People! Arroyo Seco Ecosystem Restoration Integrated Feasibility Study

2. BUILDING STRONG ® And Taking Care Of People! Study Overview Background Civil Works/SMART Planning Process Preliminary Study Objectives Measures and Alternatives Schedule Meeting Objectives

3. BUILDING STRONG ® And Taking Care Of People! Federal – Local Partnership U.S. Army Corps of Engineers Lead Agency Los Angeles County Flood Control District Lead Local Sponsor

4. BUILDING STRONG ® And Taking Care Of People! Local Partnerships Council of Arroyo Seco Agencies

5. BUILDING STRONG ® And Taking Care Of People! 2005 Partnership between Corps and LACFCD 2008 Partnership between LACFCD and local agencies 2002 Corps completes Arroyo Seco Watershed Reconnaissance Study 2011 Corps completes Arroyo Seco Watershed Feasibility Scoping Meeting Documentation (Baseline Conditions) 2013 Corps holds rescoping charette workshop with VT Study Timeline 2017 Corps to submit Final Report 2014 Corps holds NEPA Public Scoping Meeting (Start of 3-year Study period) 2012 Corps modernizes Planning process - SMART

6. BUILDING STRONG ® And Taking Care Of People! ARROYO SECO ECOSYSTEM RESTORATION FEASIBILITY STUDY

7. BUILDING STRONG ® And Taking Care Of People! RECONNAISSANCE PHASE REPORT FEASIBILITY PHASE REPORT FINAL DESIGN CONSTRUCTION DOCUMENTS CONSTRUCTION PROJECT OPERATION AND MAINTENANCE (BY LOCAL SPONSOR) Civil Works Process Congressional Authorization

8. BUILDING STRONG ® And Taking Care Of People! 6 Select Recommended Plan Compare Alternative Plans Evaluate Effects of Alternative Plans Inventory & Forecast Resource Conditions Specify Problems & Opportunities 5 4 3 2 1 In Progress Future Steps Formulate Alternative Plans Six Step Planning Process

9. BUILDING STRONG ® And Taking Care Of People! SMART Process RECONNAISSANCE PHASE REPORT FEASIBILITY PHASE REPORT FINAL DESIGN CONSTRUCTION DOCUMENTS CONSTRUCTION PROJECT OPERATION AND MAINTENANCE (BY LOCAL SPONSOR)

10. BUILDING STRONG ® And Taking Care Of People! Decision document Includes Recommended action Cost estimate for action NEPA and CEQA document Leads to request for Congressional authorization for funding towards design and construction Integrated Feasibility Study Report

11. BUILDING STRONG ® And Taking Care Of People! 11 Those restoration opportunities that are associated with wetlands, riparian and other floodplain and aquatic systems are most appropriate for Corps involvement. Ecosystem Restoration Fundamentals

12. BUILDING STRONG ® And Taking Care Of People! Almost complete loss of stream conditions (structure and function) that support aquatic species & their habitats. Identified Problem

13. BUILDING STRONG ® And Taking Care Of People!  Restore quality and quantity of aquatic, wetlands, and riparian habitats  Restore natural channel sinuosity  Improve Aquatic Habitat  Enhance Recreational Opportunities (compatible with restoration; passive; example – nature trail, educational signage) Planning Objective and Study Goals

14. BUILDING STRONG ® And Taking Care Of People!  Maintain flood risk management function/capability of existing Arroyo Seco system  Maintain Devil’s Gate Dam flood storage capacity  Avoid Hazardous and Toxic Waste (HTW) site at Jet Propulsion Lab  Minimize impacts to transportation infrastructure such as highways and bridges  Minimize adverse impacts to nearby residences, especially historic and culturally significant districts and properties  Minimize impacts to existing facilities and infrastructure such as Rose Bowl Planning Constraints and Considerations

15. BUILDING STRONG ® And Taking Care Of People!  CHAP evaluation – Combined Habitat Assessment Protocol  Allows comparison of quality of existing habitat versus alternatives  Assists in selection of the recommended plan Habitat Evaluation

16. BUILDING STRONG ® And Taking Care Of People! Study Reaches

17. BUILDING STRONG ® And Taking Care Of People! Reach 1

18. BUILDING STRONG ® And Taking Care Of People! Reach 3

19. BUILDING STRONG ® And Taking Care Of People! Reach 4

20. BUILDING STRONG ® And Taking Care Of People! Reach 5

21. BUILDING STRONG ® And Taking Care Of People!  1) No Action: Under this alternative, the Corps would take no action to restore any ecosystem functions or values within the Arroyo Seco study area.  2) Daylight storm-drains- side-slope and the bottom would be naturalized Preliminary Measures (Under Evaluation)

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25. BUILDING STRONG ® And Taking Care Of People! Preliminary Measures (Under Evaluation)  3) Parallel Natural System: Low flow channels – side- slope and the bottom would be natural.  3A) Low-flow channel  3B) RCB culverts with low-flow channel  4) Floodplain Benching – side-slope and bottom would be natural

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29. BUILDING STRONG ® And Taking Care Of People! Preliminary Measures (Under Evaluation)  5) Sheetpile Bank Protection with Floodplain – side- slope would be a vertical wall, while the bottom would be natural.  6) Riparian Zones

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33. BUILDING STRONG ® And Taking Care Of People! Combination Alternative  Combinations would be evaluated by the habitat outputs, various analyses and expert and agency guidance.

34. BUILDING STRONG ® And Taking Care Of People! One Possible Combination

35. BUILDING STRONG ® And Taking Care Of People! MilestonesDate CharetteOctober 2013 Review Plan approvedAugust 2014 Alternative MilestoneMay 2015 Tentatively Selected PlanMarch 2016 Agency Decision MilestoneSeptember 2016 Submit Final ReportMarch 2017 CWRBMay 2017 Signed Chief’s ReportJune 2017 Termination DateAugust 2017 Schedule

36. BUILDING STRONG ® And Taking Care Of People! Questions U.S. Army Corps of Engineers Los Angeles County Flood Control District Priyanka Wadhawan 915 Wilshire Blvd, Suite 980 Los Angeles, CA 90017 (213) 452-3802 Priyanka.wadhawan@usace.army.mi Patrick Goodfellow 900 S. Fremont Avenue Alhambra, CA 91803 (626) 458-7034 pgoodfellow@dpw.lacounty.gov For more information on the Study: