LCWD Board Meeting January 14, 2014 1680 Carneros Avenue, Napa

1. Los Carneros Water District LCWD Board Meeting January 14, 2014 1680 Carneros Avenue, Napa

2. Today’s Presentation • Present the Recommended Project – Then and Now • Discuss the Modeling Effort • Present the Preliminary and Final Design Scopes and Status • Discuss Construction Management Expectations • Present Next Steps

3. Alternative 5 Future was the Recommended Project • Served majority of District/acreage – 5,619 ac • Lowest cost alternative • Addressed most severe groundwater area – Los Carneros Ave. • Eliminated District storage and pumping • Incorporated a water management strategy

4. Alternative 5 Future Pipeline Route

5. September 2012 Changes: • SCWA/SVCSD will be sending recycled water to the Napa Marsh and some parcels within District boundaries for a limited time • This change affected just over 1,000 acres • New project definition: Parcels connecting to the SCWA pipeline are removed from the LCWD system, lines are resized for the reduced demand • Alt 6A was the updated recommended alternative • Now, it’s a modified Alt 6A

6. Alternative 6A Selected by the LCWD Board in December 2012

7. Alternative 6A – Then…

8. Basis of Design – Now…

9. Irrigation Assumptions

10. Hydraulic Design Criteria

11. Hydraulic Model Demonstration

12. Preliminary Design Scope • Finalize Alignments (Carollo) • Surveying (Mountain Pacific) • Potholing (Nielson Construction) • Geotechnical Investigation (RGH) • Corrosion Investigation (JDH Corrosion) • Funding Summary Assistance (Carollo) • Environmental Services (Bowker and Brown)

13. Survey Status (Mountain Pacific) • Topographic Surveys are Complete • Utility Surveys are Complete • Resolved datum conflicts between new survey and Stanly Ranch topography.

14. Potholing Status (Nielson Construction) • Potholing Activities are Complete • RW Pipeline will be crossing: • Two 26” Steel High pressure Gas lines • One 24” Steel High pressure Gas line • Two 16” Steel High pressure Gas lines • One 12” Transmission Gas Main

15. Geotechnical Status (RGH) • Geotechnical Borings are Complete • Soil Testing is Complete • Draft Geotechnical Report Delivered – to be considered mainly for pipeline design and installation conditions.

16. Corrosion Investigation Status (JDH) • Chemical Analysis is Complete • Draft Corrosion Report Delivered • Soils are severely to mildly corrosive – this was expected

17. Environmental Status (Bowker and Brown) • Initial Study and Mitigated Negative Declaration (IS/MND) – released Dec 2013 • Publically noticed for 30 days: Dec 19 – Jan 21 • Review on line at District’s web page and Napa County Library • To date: 1 Comment Letter received from Caltrans – traffic and encroachment

18. Funding Status • Submitted 2 of 4 SRF low interest loan packages – general and technical (1/10/14) • Financial, and environmental packages to follow next • Last year grant funds were available too and distributed among the loan applicants – no additional application is needed • When the financing is approved, the SWRCB staff also look at grant funds available and apply what they can

19. Construction Management Considerations/Expectations • Only one buried utility - gas • River Crossing – have obtained the bridge drawings from the County • Culvert Crossings – will develop a few standard details • Consider environmental considerations • Pavement considerations

20. Historic crossing should use raised depth crossing

21. Culvert crossings will require a combination of deep undercrossings and concrete encasements

22. The contractor needs to be maintain responsibility for utility coordination

23. Protecting trees will be a potential issue for the contractor

24. Final Design/Next Steps • Develop preliminary plans, specs, details (75% complete) • Design Coordination w other Agencies (NSD, SWRCB, County, etc) • ROW Acquisition/Permitting assistance • Funding application assistance • Bid Phase services • Timing: Jan – May 2014

25. Thank You! Questions…