SLIDE 1
Public Works Agency
Wednesday, December 12, 2012
Ventura County Watershed Protection District
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 2
Santa Ana Boulevard Public Works Agency Ventura County Watershed - - PowerPoint PPT Presentation
Santa Ana Boulevard Public Works Agency Ventura County Watershed - - PowerPoint PPT Presentation
Santa Ana Boulevard Public Works Agency Ventura County Watershed Protection District Bridge Replacement Project Wednesday, December 12, 2012 Updated Feasibility Study Public Works Agency Wednesday, December 12, Ventura County Watershed
SLIDE 2
SLIDE 3
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 3
Updated Hydraulic Studies
Bridge Location Sediment Deposition
Higher Water Surface Due to Sedimentation
SLIDE 4
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 4
Purpose and Need
Remove Constriction Additional Capacity Required for Dam Removal
SLIDE 5
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 5
Bridge Lengthening
Deficient Hydraulic Freeboard
SLIDE 6
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 6
Freeboard Criteria
Corps Criteria Based on Risk State Criteria Q50yr+2’ or Q100yr FEMA Q100yr+4’ (Required for Levee Cert)
Analysis 1 – Channel Widening Analysis 2 - Future Sedimentation Analysis 3 – 46,000 CY of Dredging Analysis 4 – 10,000 CY of Dredging Bridge Lengthen Lengthen Alternatives Fail to Satisfy FEMA Criteria
SLIDE 7
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 7
Replacement on Existing
Traffic Impacts
SLIDE 8
Public Works Agency
Environmental Impacts – Fish Barrier
Upstream Detour
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 8
SLIDE 9
Public Works Agency
Right of Way Impacts (Southeast)
Downstream Detour
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 9
SLIDE 10
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 10
Replacement Downstream
Right of Way Impacts (Southeast)
SLIDE 11
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 11
Upstream Replacement
Right of Way Impacts (Northwest)
SLIDE 12
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 12
Bridge Replacement Alternative
SLIDE 13
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 13
Comparative Project Costs
SLIDE 14
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 14
Value Engineering
SLIDE 15
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 15
Value Engineering
Highest “Value” for the $ Apply known engineering costs Cheapest solution not always best value
Best Value – Upstream Replacement
SLIDE 16
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 16
Next Steps - Public Outreach Aesthetics & Design
SLIDE 17
Public Works Agency
Wednesday, December 12, 2012 Ventura County Watershed Protection District Slide 17