Los Angeles City Watersheds Enhanced Watershed Management Plans

Transcription

1 Los Angeles City Watersheds Enhanced Watershed Management Plans 1

2 Enhanced Watershed Management Programs Program Environmental Impact Report Status Angela George County of Los Angeles Dept. of Public Works Los Angeles County Flood Control District

3 Los Angeles County EWMP Groups

4 Program Environmental Impact Report Regional Projects Centralized Projects Non-Structural Projects Distributed Projects

5 EWMP PEIR Schedule August 2014 January 2015 March 2015

6 Angela George Assistant Deputy Director, Watershed Management Division County of Los Angeles Dept. of Public Works Los Angeles County Flood Control District

7 Los Angeles City Watersheds Enhanced Watershed Management Plans 7

8 Los Angeles City Watersheds Enhanced Watershed Management Plan Development Status 8

9 Recap: Schedule Workshop 2 Workshop 3 J A S O N D J F M A M J Approach to Address RWLs Screen & Assess Regional BMPs Select WQ Control Measures; Conduct RAA Analysis EWMP Schedule; Cost Estimate Submit EWMP Plan by June 28 Monthly Watershed Management Group Meetings 9 9

10 Recap: What Is a Regional Project? Captures and Retains 85 th Percentile Storm From multiple parcels Drainage area > 10 acres if possible, but not required May Provide Additional Benefits 10

11 Recap: What Are EWMP Distributed Regional Projects? Many Projects that, In Aggregate Capture and Retain 85 th Percentile Storm From multiple parcels Drainage area > 10 acres if possible, but not required May Provide Additional Benefits 11

12 Recap: Centralized Projects Captures and Retains < 85 th Percentile Storm From multiple parcels Drainage area > 10 acres if possible, but not required May Provide Additional Benefits 12

13 Potential Regional Projects Identified Preliminary Draft Still Evaluating Feasibility May Change Want Your Input 13

14 Upper Los Angeles River EWMP Status 14

15 ULAR Watershed Mgmt. Group City of LA County of LA LACFCD Alhambra Burbank Calabasas Glendale Hidden Hills La Canada Flintridge Montebello Monterey Park Pasadena Rosemead San Fernando San Gabriel San Marino South Pasadena Temple City 15

16 Upper Los Angeles River Watershed 476 square miles Land Use Composed Primarily as Residential 53% Significant groundwater recharge opportunities 16

17 Water Quality Priorities Top TMDLs: Metals (2028) Bacteria (2037) EPA Urban Lakes Toxics Nutrients + Other TMDLs and many other pollutants without TMDLs 17

18 TIER Very High Tier COUNT (CLUSTER) 17 High Tier 109 Medium Tier 563 TOTAL 692

19 Integration of EWMP with Other Planning Efforts Los Angeles River Ecosystem Restoration Feasibility Study Reach 3 Confluence of Verdugo Wash 19

20 Reach 7 Arroyo Seco Channel Reach 7 Cornfields 20

21 Integration of EWMP with Other Planning Efforts City of Los Angeles Department of Water and Power Stormwater Capture Master Plan 21

22 Alhambra Golf Course Stormwater Quality Improvement Project Project Lead: City of Alhambra Potential Partners: City of Pasadena City of San Gabriel City of San Marino City of South Pasadena Potential Site Features: Site Area: 134 acres Drainage Area: 1221 acres Design Volume: 17 million gal 22

23 Alhambra Golf Course Stormwater Quality Improvement Project Project Lead: City of Alhambra Potential Benefits: Drains urbanized residential area Serves multiple WMG jurisdictions Stormwater Capture Stormwater Quality Improvement Stormwater Used for Irrigation Water Conservation Recreation 23

24 Lacy Park Infiltration/Reten tion Facility Project Lead: City of San Marino Potential Partners: City of San Marino City of Pasadena Potential Site Features: Site Area: 27 acres Drainage Area: 732 acres Design Volume: 10 million gal 24

25 Lacy Park Infiltration/Reten tion Facility Project Lead: City of San Marino Potential Benefits: Drains urbanized residential area Serves multiple WMG jurisdictions Stormwater Capture Stormwater Quality Improvement Stormwater Used for Irrigation Water Conservation Recreation 25

26 Lower Arroyo Park Stormwater Quality Improvement Project Project Lead: City of South Pasadena Potential Partners: City of South Pasadena City of Pasadena City of Los Angeles Potential Site Features: Site Area: 26 acres Drainage Area: 88 acres Design Volume: 600,000 gal 26

27 Lower Arroyo Park Stormwater Quality Improvement Project Project Lead: City of South Pasadena Potential Benefits: Drains urbanized residential area Serves multiple WMG jurisdictions Stormwater Capture Stormwater Quality Improvement Stormwater Used for Irrigation Water Conservation Recreation 27

28 Roosevelt Park Centralized BMP Project Lead: County of Los Angeles Potential Site Features: Drainage Area: 71.6 acres Treatment Volume Capacity: 717,000 gallons Potential Benefits: Drains urbanized residential/commercial area Stormwater Capture/Infiltration Stormwater Quality Improvement Stormwater Used for Irrigation Water Conservation Recreation 28

29 Santa Monica Bay EWMP (J2/J3) 29

30 Watershed 53 square miles (34,000 acres) DRAFT Member Agencies are City of Los Angeles, County of Los Angeles, City of El Segundo and City of Santa Monica The J2/J3 area is in the central region of Santa Monica Bay The J2/J3 beaches receive millions of visitors annually Land use is comprised of predominately open space and residential 30

31 Priorities DRAFT 31 Highest: Bacteria Water Category Other priorities Body include Pollutant trash, lead, and pesticides / other organics SMB 1 2 Beaches SMB SMB Offshore/ Nearshore Santa Monica Canyon Channel Dry Weather Bacteria, Wet Weather Bacteria PCBs/DDTs Debris Lead Indicator Bacteria 3 None None

32 Initial Site Screening DRAFT Sites were categorized by potential opportunity (high to low) Categorization was based on public ownership, parcel size, distance to stormdrains 141 potential opportunity sites were identified 45 have high potential opportunity High Medium Low 32

33 Example Regional Projects DRAFT 5 examples shown today 3 within the City of Los Angeles 1 within the City of Santa Monica City of Los Angeles City of Santa Monica 1 within the City of El Segundo City of Los Angeles City of El Segundo 33

34 Los Liones Park (Santa Ynez Canyon) Area: City of Los Angeles and State Parks Department DRAFT Type: Capture, Storage, Infiltrate / Treat and Use Drainage Area: 411 acres Design Volume: 978,000 gallons Additional Benefits: Aesthetics and habitat Dike and Storm Drain Inlet Diversion Bioswale Infiltration 34

35 Riviera Country Club DRAFT Area: City of Los Angeles Type: Capture, Treat, and Use Drainage Area: 4,592 acres Design Volume: 358,000 gallons Additional Benefits: Stormwater use & water conservation Diversion Existing Storm Drain CDS Storage Tank Treatment Irrigation

36 Brentwood Country Club DRAFT Area: City of Los Angeles Type: Capture, Treat, and Use Drainage Area: 174 acres Design Volume: 130,000 gallons Additional Benefits: Stormwater use and water conservation Diversion Existing Storm Drain CDS Storage Tank Treatment Irrigation

37 Memorial Park DRAFT Area: City of Santa Monica Type: Infiltration and capture/use, supply to SMURFF Drainage Area: 3,576 acres Design Volume: 2,000,000 gallons Additional Benefits: Water conservation Potential basin location Diversion Existing Storm Drain CDS Storage Tank Infiltration Treatment Irrigation 37

38 Imperial Highway (Expanded) DRAFT Area: City of Los Angeles and City of El Segundo Type: Bioswale and infiltration Drainage Area: 7.5 acres (current) 726 acres (expanded) Design Volume: 82,000 gallons (current) 410,000 gallons (expanded) Additional Benefits: Aesthetics and habitat Potential expansion: Divert runoff from existing storm drain to capture larger drainage area, widen/lengthen trench Existing Storm Drain and Surface Flow Existing trench (black) CDS Infiltration Trench 38 Infiltration

39 Ballona Creek EWMP Status 39

40 Ballona Creek Watershed Mgmt. Group City of LA Beverly Hills W. Hollywood Culver City Inglewood Santa Monica Uninc. LA Co. LACFCD 40

41 Ballona Creek Watershed Mgmt. Group 60% Residential Land Use 15 inches of rainfall Tight Soils Depth to Groundwater <30 feet in many areas Most open space remaining is in SM Mountains Most urbanized watershed 41

42 Water Quality Priorities Top TMDLs: Bacteria (2021) Metals (2021) Toxics (2021) + Other TMDLs and many other pollutants without TMDLs 42

43 TIER COUNT (CLUSTER) Very High Tier 26 High Tier 44 Medium Tier TOTAL

44 Edward Vincent Jr. Park Stormwater Quality and Beneficial Use Improvement Project Project Lead: City of Inglewood Potential Benefits: Drains Urbanized Residential Area Stormwater Capture Stormwater Quality Improvement Creek Daylighting Stormwater Used for Irrigation Water Conservation Recreation Potential Site Features: Site Area: 51 acres Drainage Area: 983 acres Design Volume: 9.9 M Gal 44

45 Edward Vincent Jr. Park BMP Opportunities 45

46 La Cienega Park Stormwater Quality and Beneficial Use Improvement Project Project Lead: City of Beverly Hills Potential Benefits: Drains heavily urbanized commercial area Stormwater Capture Stormwater Quality Improvement Stormwater Used for Irrigation Water Conservation Recreation Potential Site Features: Site Area: 17 acres Drainage Area: 853 acres Design Volume: 12 M Gal 46

47 La Cienega Park & Frank Fenton Field BMP Opportunities 47

48 Plummer Park Stormwater Quality and Beneficial Use Improvement Project Project Lead: City of West Hollywood Potential Benefits: Stormwater Capture/Infiltration Stormwater Quality Improvement Stormwater Used for Irrigation Water Conservation Recreation Potential Site Features: Site Area: 7.6 acres Drainage Area: 389 acres Design Volume: 3.8 M Gal 48

49 Plummer Park BMP Opportunities Potential Reuse for Irrigation throughout Park 49

50 Rancho Park Golf Course Stormwater Quality and Beneficial Use Improvement Project Project Lead: City of Los Angeles Potential Benefits: Stormwater Capture Stormwater Quality Improvement Lake or Pond/Water Features Stormwater Used for Irrigation Recreation Potential Site Features: Site Area: 189 acres Drainage Area: 359 acres Design Volume: 4.7 M Gal 50

51 Rancho Park Golf Course BMP Opportunities 51

52 Culver Boulevard Median Stormwater Quality and Beneficial Use Improvement Project Project Lead: City of Culver City Potential Benefits: Stormwater Capture/Infiltration Stormwater Quality Improvement Low Impact Development Stormwater Used for Irrigation Potential Se Features: Site Area: 2.1 acres Drainage Area: 131 acres Design Volume: 1.6 M Gal 52

53 Culver Boulevard Median BMP Opportunities 53

54 Dominguez Channel Watershed Management Area Group (DC WMAG) Enhanced Watershed Management Plan (EWMP) Status 54

55 DC WMAG 58 square miles of 133 total in watershed Table 1.2: DC WMG Land Use Land Use Category Percentage Agriculture 0.3% Commercial 18.4% Industrial 15.7% Multi-Family 14.2% Residential Single Family 27.7% Residential Open 7.8% Other Urban 15.9% Total: 100% 55

56 DC Constraints Infiltration < 0.5 in/hr 56

57 DC WMAG Priorities 1.Channel: Wet weather metals 2.Machado: Nutrients 3.Cabrillo Beach: Bacteria Actions Under Way 4.Channel: Dry weather metals 5.Harbor &Estuary: Sediment management Sediment Management Plan 6.Channel: Bacteria 7.Channel: Nutrients 57

58 Volume of Water to Control Pollutant Loads Total 85 th percentile storm capture = 1,615 ac-ft 58

59 El Segundo Owner Location Area Drained (acres) Volume Captured (gal) City of El Segundo South Hughes Way and Allied Way, El Segundo, CA 474 Site Area (acre) million BMP Type Potential Additional Benefits Detention Basin Water Supply (Seawater Barrier) PRELIMINARY DRAFT SUBJECT TO CHANGE

60 El Segundo Owner Location Area Drained (acres) Volume Captured (gal) City of El Segundo South Hughes Way and Allied Way, El Segundo, CA 474 Site Area (acre) million BMP Type Potential Additional Benefits Detention Basin Water Supply (Seawater Barrier) PRELIMINARY DRAFT SUBJECT TO CHANGE

61 Chester Washington Golf Course Item Owner Location Site Area (acre) 116 Area Drained (acre) Volume Captured (gal) BMP Type Potential Additional Benefits Detail Los Angeles County (Operated under lease by American Golf) 1930 W 120th St, Los Angeles, CA North 636 and Southeast 542 North 8.4 million and Southeast 7.2 million Subsurface Retention Water Supply PRELIMINARY DRAFT SUBJECT TO CHANGE

62 Chester Washington Golf Course Item Owner Location Site Area (acre) 116 Area Drained (acre) Volume Captured (gal) BMP Type Potential Additional Benefits Detail Los Angeles County (Operated under lease by American Golf) 1930 W 120th St, Los Angeles, CA North 636 and Southeast 542 North 8.4 million and Southeast 7.2 million Subsurface Retention Water Supply PRELIMINARY DRAFT SUBJECT TO CHANGE

63 Harbor City Park And LACFCD Parcel Item Owners Location Site Area (acre) 14.8 Area Drained (acre) 4,460 Volume Captured (gal) BMP Type Potential Additional Benefits Detail City of Los Angeles (Harbor City Park), Los Angeles County Flood Control District (LACFCD parcel Frampton Ave, Los Angeles, CA and Northeast corner of Lomita Blvd and S Vermont Ave, Los Angele, CA million Subsurface Retention (Harbor Park) Surface Retention (LACFCD Parcel) Water Supply, Recreation, Habitat PRELIMINARY DRAFT SUBJECT TO CHANGE

64 Item Detail City of Los Angeles (Harbor City Owners Park), Los Angeles County Flood Control District (LACFCD parcel Frampton Ave, Los Angeles, Location CA and Northeast corner of Lomita Blvd and S Vermont Ave, Los Angele, CA Site Area (acre) 14.8 Area Drained (acre) 4,460 Volume Captured (gal) 25.1 million BMP Type Subsurface Retention (Harbor Park) Surface Retention (LACFCD Parcel) Potential Additional Benefits Water Supply, Recreation, Habitat Harbor City Park And LACFCD Parcel PRELIMINARY DRAFT SUBJECT TO CHANGE

65 Darby Park Item Owner Location Site Area (acre) 13.5 Area Drained (acre) Volume Captured (gal) Detail City of Inglewood 3400 W Arbor Vitae St, Inglewood, CA million BMP Type Subsurface Retention Potential Additional Benefits Water Supply, Recreation, Habitat PRELIMINARY DRAFT SUBJECT TO CHANGE

66 Darby Park Item Owner Location Site Area (acre) 13.5 Area Drained (acre) Volume Captured (gal) Detail City of Inglewood 3400 W Arbor Vitae St, Inglewood, CA million BMP Type Subsurface Retention Potential Additional Benefits Water Supply, Recreation, Habitat PRELIMINARY DRAFT SUBJECT TO CHANGE

67 Averill Park Item Detail Owner City of Los Angeles Location 1300 S Dodson Ave, San Pedro, CA Site Area (acre) 10.7 Area Drained (acre) 1,376 Volume Captured (gal) BMP Type Potential Additional Benefits 7.0 million Subsurface Retention Water Supply, Recreation, Habitat PRELIMINARY DRAFT SUBJECT TO CHANGE

68 Averill Park Item Detail Owner City of Los Angeles Location 1300 S Dodson Ave, San Pedro, CA Site Area (acre) 10.7 Area Drained (acre) 1,376 Volume Captured (gal) BMP Type Potential Additional Benefits 7.0 million Subsurface Retention Water Supply, Recreation, Habitat PRELIMINARY DRAFT SUBJECT TO CHANGE

69 Marina del Rey EWMP Status 69

70 Marina del Rey Size: 1,409 acres Land Uses: Residential Commercial and services Responsible Agencies: City of Los Angeles County of Los Angeles City of Culver City Los Angeles County Flood Control District 70

71 Marina del Rey Constraints Unique Challenges Highly Urbanized High Groundwater Table Distributed BMP approach Focus on the 85 th percentile flow Treatment BMPs for remaining areas 71

72 Marina del Rey Priorities Category 1 pollutants (Table 13 from EWMP Work Plan) No Category 2 or Category 3 Waterbody Pollutant Classification Dissolved Copper Category 1 Copper Category 1 Lead Category 1 Zinc Category 1 Marina del Rey Harbor Total PCBs Category 1 Total DDTs Category 1 p,p -DDE Category 1 Chlordane Category 1 Fecal coliform Category 1 Enterococcus Category 1 Ballona Lagoon/ Venice Canal Total coliform Category 1 None known None 72

73 Marina del Rey Potential Regional Project Opportunities Distributed Green Streets Infiltration/ Capture and use Watershed wide opportunities 73

74 Marina del Rey Potential Regional Project Opportunities Example BMPs 74

75 Marina del Rey Potential Regional Project Opportunities Public/Private Partnerships Green Parking Lots Capture and use 75

76 Marina del Rey Future Opportunities Marina Renovation and Development Subject to requirements to treat 1.5 times the 85th percentile volume. 76

77 Marina del Rey Successes Parking Lot 7 Bio-retention/infiltration Infiltrates > 85 th percentile storm 77

78 EWMPs are a combination of: Regional Projects Distributed Projects (Green Streets), and Institutional Programs Chad Helmle, PE Tetra Tech 78

79 Why Do We Need a Distributed Green Infrastructure Program? Green infrastructure is the first line of defense adaptable to retrofit most land uses 79

80 Why Do We Need a Distributed Green Infrastructure Program? Distributed Green Infrastructure has most access to dirty water Often 50+% of required BMPs for compliance 71% drains to Distr. Green Infra. Opportunities Drains elsewhere 80

81 Why Do We Need a Distributed Green Infrastructure Program? All BMPs are not created equal When it comes time to put things in the ground, a program ensures smart EWMP-lementation Allows for efficiency through planning, standardization, and coordination 1/3 acre Treating 20 acres 1/3 acre Treating 1/3 acre 81

82 What is a Distributed Green Infrastructure Program? Now Compliance Schedule 100% Compliance Where, when, how to implement green streets and distributed green infrastructure Focus on short-term, lowhanging fruit and long-term cost savings 82

83 Next Steps Linking the EWMP to Implementation The EWMP assumptions will form basis of green infrastructure program Program should implement model-recommended quantities to treat model-input contributing areas EWMP Low Tier Regional Institutional and MCMs Green Streets Highest Tier Regional SUBWATERSHED STAGING PLAN Resolution Altitude Green Infrastructure Program 83

84 Summary of Key Issues Path Forward Schedule Financial Strategy Linkage to other programs/projects Dave Jones CH2MHILL 84

85 Overview of EWMP Development and Implementation Process STEP 1 - Develop Water Quality Priorities STEP 2 - Identify, Develop and Assess Control Measures STEP 3 - Conduct RAA Analysis to Determine Effectiveness of Proposed BMP Approach and Develop Phased Implementation Strategy Iterative Process Iterative Process STEP 4 - Establish EWMP Plan that Achieves Water Quality Goals STEP 5 - Implement EWMP STEP 6 - Monitor Water Quality Step 3a - As Needed, Refine BMP Approach Until RAA Analysis Predicts Attainment of Water Quality Goals STEP 7 - Reassess and, as Needed, Refine EWMP 85

86 Project Schedule EWMP Plan FY Workshop 2 Workshop 3 J A S O N D J F M A M J Approach to Address RWLs Screen & Assess Regional BMPs Select WQ Control Measures; Conduct RAA Analysis EWMP Schedule; Cost Estimate Submit EWMP Plan by June 28 Monthly Watershed Management Group Meetings 86 Workshop 3 will focus on obtaining feedback from stakeholders on the draft EWMP plans

87 Financial Strategy where the rubber hits the road The new AB 2403 provides the best tool to facilitate rate increases for stormwater quality projects Provides relief from Prop 218 process Covers both Capital and O&M costs Need to strike a balance between achieving water quality improvements and dealing with fiscal realities The goal is to achieve watershed-wide consensus on the financial strategy for each EMWP 87

88 Linkage to other programs - leverage funding through integration 2014 Water Bond offers opportunities: $200M for Stormwater Capture projects $98M to support LA regional IRWMP $100M for urban creek restoration $70M to support local conservancies Continued partnerships with local agencies: Stormwater Capture Master Plan - City of LA DWP and other agencies LA River Revitalization - US Army Corps of Engineers and City of LA Potential future Local Resource Program (LRP) funding from the MWDSC 88

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90 Los Angeles City Watersheds Enhanced Watershed Management Plans 90