Long-Term Control Plan Orientation. July 1, 2009

Transcription

1 Long-Term Control Plan Orientation July 1, 2009

2 Introductions City Staff Program Management Team

3 Agenda LTCP Development CSO Controls & Costs Implementation Schedule Phases Implementation Approach LTCP Key Success Factors Discussion & Questions

4 LTCP Development

5 Challenges Facing Omaha Meeting the increased requirements of the federal Clean Water Act Balancing the following needs: Regulatory compliance Economic affordability Community acceptance Economic Affordability Community Acceptance CSO Solutions Regulatory Compliance

6 772+ CSO Communities Nationwide

7 Wet weather inflows exceed the CSS capacity and trigger a CSO Roof Leaders Stormwater Runoff Catch Basins Combined Sewer Sanitary Sewer Combined Sewer Overflow Interceptor Sewer to Wastewater Treatment Facility River

8 Metro Service Area Two regional treatment plants 10 wholesale users 275 sq mi drainage area 600,000 service population

9 Omaha Sewer System 1,950 miles of sewers Eastern half combined Western half separate 43 sq mi combined sewer area 28,000 acres 6,200 sq blocks 29 CSO outfalls 10 to Papio Creek 19 to Missouri River 3 recently eliminated

10 Combined Sewer System Study Areas 10 Study Areas: 6 Complex / 4 Less Complex Missouri River Watershed Bridge Street Minne Lusa Burt-Izard Leavenworth South Interceptor Ohern/Monroe Papillion Creek Watershed Cole Creek Papillion Creek North Saddle Creek Papillion Creek South

11 CSO Control Program Timeline

12 CSO Control Options Considered Complete sewer separation 410 sq blocks per year for 15 years Then, treat separated stormwater? Storage Below-ground tanks Deep tunnels

13 CSO Control Options Considered High-rate treatment Near points of discharge Operate only in wet weather Combination of Solutions Green/Natural solutions

14 Typical Combined Sewer Combined Service Lateral Stormwater Lateral Combined Sewer Line Omaha residential street

15 Typical Sewer Separation House Sanitary Lateral Stormwater Pipeline Stormwater Lateral Sanitary Sewer Line Omaha residential street

16 Substantively Complete LTCP and Refinement Submitted Substantively Complete LTCP to NDEQ in September Comments were received from NDEQ & EPA and addressed. Refinement Period: October 2007 through June Final LTCP deadline is October 1, 2009

17 Schedule for Final LTCP Public Comment: July 2 nd August 5 th NDEQ/EPA Presentation: August 6 th Public Meeting: August 18 th Deadline: October 1 st

18 Key Refinement Period Results Deep tunnel concept confirmed InfoWorks Model updated More sewer separation projects added Treatment of up to 150 mgd at MRWWTP Minne Lusa RTB replaced with storage tank Green solution projects weaved in

19 More Information LTCP Copies: Public web site: Public Works Office Omaha Public Libraries Neighborhood Center of Greater Omaha RFP Information: Public Works web site: CSO Program Background: NE Educational TV documentary Our Water, Our Future

20 CSO Controls & Costs

21 CSO Controls - Tunnel Deep Tunnel: Length: 5.4 miles Diameter: 17 feet Depth: 170 feet Number of drop shafts: 5 Changes from SCLTCP Reduced length by 0.4 miles Increased diameter from 12.5 to 17 feet Reduced number of drop shafts from 6 to 5

22 CSO Controls Treatment and Storage Facilities High-Rate Treatment at Saddle Creek Outfall Flow rate: 315 million gallons per day Reduced size of facility by adding sewer separation area High-Rate Treatment at Missouri River WWTP Flow rate: 52 million gallons per day Reduced size of facility by increasing tunnel size Storage Tank at Minne Lusa Outfall Volume: 3.7 million gallons Tank MG Tank MG Eliminated Treatment Facility by adding additional sewer separation areas Storage Tank near Benson Park Volume: 80,000 gallons

23 Tunnel Boring Machine (New York)

24 Tunnel Schematic

25 Drop Shaft Surface Appearance (Milwaukee)

26 RTB Schematic

27 RTB Rendering (Des Moines) Control Building Overflow Channel Dechlorination Chemical Storage Lift Station Untreated Overflow Channel Basins

28 CSO Controls Sewer Separation CSO separation projects shown ($600 million) City will also perform RNC separation ($8 to13 million per year)

29 CSO Controls Minne Lusa Stormwater Conveyance

30 CSO Controls Other Projects Industrial Lift Station & Force Main Missouri River WWTP Improvements South Interceptor Force Main

31 Control of Combined Sewage Volume Total Existing Volume of Combined Sewage Volume Controlled at Control Level Increasing Volume, MG Volume Controlled, Baseline Volume Controlled, Existing

32 Overflow Statistics, Existing Conditions Missouri River Watershed Papillion Creek Watershed Number of CSO Events Annual CSO Volume (MG) 2, Total System 78 3,498 Total Wet Weather Volume NA 8,181

33 Overflow Statistics, LTCP Conditions Missouri River Watershed 4 overflows per year 92% volume capture Compliance with WQ standards in Missouri River above Papillion Creek (122 E. coli vs 222 under Existing Conditions) Papillion Creek Watershed 4 overflows per year 96% volume capture Compliance with WQ standards in Papillion Creek not precluded

34 Cost of CSO Controls CSO Control Programs involve a significant cost Atlanta, GA - $3.0B for 19 sq mi Cincinnati, OH - $1.5B for 74 sq mi Cleveland, OH - $1.6B for 75 sq mi Louisville, KY - $500M for 27 sq mi Nashville, TN - $1.3B for 15 sq mi Omaha, NE - $ for 51 sq mi

35 Cost of CSO Controls Program Cost: $1.634 billion April 2009 ENR CCI $50/month sewer bills in 2017 Proactive review of low & fixed income assistance options

36 Average Residential Sewer Bills: Past, Present, and Future $40.00 $35.00 $37.23 $30.00 $25.00 $20.00 $15.00 $10.00 $5.00 $ Monthly Household Bill

37 Implementation Schedule Phases

38 Major Project Phases Begin Final Design to Operationally Complete Phase 1 (MRWWTP): Phase 2 (ML Stormwater): Phase 3 (Saddle Creek RTB): Phase 4 (Deep Tunnel & RTB):

39 Sewer Separation Phases Earliest Bid Date to Completion of All Phase 1: (3 study areas) Phase 2: (7 study areas) Phase 3: (8 study areas) Phase 4: (11 study areas) Phase 5a (MRW): (11 study areas) Phase 5b (PCW): (11 study areas) Phase 6: (9 study areas) Phase 7: (2 study areas)

40 Project Delivery Approaches Currently based on Design-Bid-Build Alternative Project Delivery will be considered case-by-case

41 Implementation Approach

42 Implementation Approach Program Management Team (PMT) contracted through 2011 Additional Consulting Services will be required Consultants will be contracted to City with PMT oversight City will decide how to package projects RNC projects will be led by City

43 Program Management Team Organization

44 City Will Follow an Adaptive Management Approach

45 Cost & Project Percentages Project Category Cost (% of total) Number of Projects Projects (% of total) Deep Tunnel Stormwater Conveyance Sewer RTBs Force Mains WWTP Lift Stations Storage Tanks Sewer Separation Misc. Projects TOTALS:

46 Projected Annual CSO Spending

47

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49 LTCP Sewer Separation Projects Sequencing Sewer Separation Element Status 2011 Study and Design Phase Bid and Construction Phase BI Basin 108-3; Webster Street Phase 2 PCS OPW 50986; 42nd & X ML 105-8; 24th & Ogden, OPW OM Industrial Flow Area Sewer Separation SI Basin CSO 113; Spring Street BI Basin 108-3; Nicholas Street Ph 1 SI Basin CSO 112; Martha Street Ph Miller Park to Pershing Bohemian Cemetery Aksarben Village Phase A BS 103-1; 36th Street Under Construction City Design City Design Under Design Under Design Under Design Under Design Pending RFP Pending RFP Pending RFP City Design BI Basin 108-3; Webster/Nicholas Ph 1 BI Basin 107-2; 26th & Corby Ph 1 Pending RFP Paxton Stormwater Conveyance Phase A PCN 211-1; Sewer Separation CC CSO 204 Ph 1 JCB Stormwater Conveyance Sewer SI Basin CSO 117; Missouri Avenue Ph 1 BI Basin 108-3; Nicholas Street Ph 2

50 Projects Under Construction BI 108-3A (Webster Street Phase 2)

51 City-Designed Projects PCS (42 nd & X) ML (24 th & Ogden) BS (36 th Street) PCN (Pacific Street, 63 rd to 66 th )

52 Projects Under Design OM (Industrial area separation) SI (Spring Street) BI 108-3B (Nicholas Street Phase I) OM Industrial Lift Station & Force Main

53 Projects Under Preliminary Design SI (Martha Street Phase 1) South Interceptor Force Main Missouri River WWTP Improvements Leavenworth Lift Station Replacement Riverview Lift Station Replacement

54 Pending RFPs (First Package) SC (Bohemian Cemetary) $8.8 million (raw construction cost) SC (Aksarben Village) $9.0 million BI (26 th & Corby) $26.9 million Country Club Area (RNC) $6.5 million

55 Pending RFPs (Second Package) BI 108-3C (Webster/Nicholas Phase I) $10.1 million ML (Miller Park to Pershing) $2.63 million

56 Pending RFPs Further evaluation of Green Solutions Flow monitoring SSES work

57 Other Near-Term Projects (2011 Start) ML (Minne Lusa Conveyance Sewer) $34.4 million ML Storz Detention Basin Improvements $2.6 million ML A (Paxton storm conveyance) $13.4 million ML B (JCB storm conveyance) $5.1 million CC CSO 204 Phase I $4.2 million SI 117 (Missouri Avenue) $15.3 million

58 Other Projects RNC Sewer Separation ($8 million in 2010, then $13 million/yr) Funding Dependent Projects: BI Lift Station Improvements Monroe Street Lift Station Improvements BS Lift Station Replacement In-Plant Lift Station Improvements

59 LTCP Key Success Factors

60 LTCP Key Success Factors Detailed plan for execution developed early Extensive guidance and tools provided Basin Consultants committed to program success Team communication Close involvement of City staff

61 LTCP Key Success Factors Burt-Izard Basin Study served as a template Cooperative, trusting relationship with NDEQ & EPA Committed involvement of Public Stakeholders

62 Discussion & Questions