U.S. Army Corps of Engineers Planning Process Meeting
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Transcript of U.S. Army Corps of Engineers Planning Process Meeting
U.S. Army Corps of U.S. Army Corps of Engineers Planning Engineers Planning
Process MeetingProcess MeetingSeptember 12, 2002
U.S. Army Corps of EngineersS a n F r a n c i s c o D i s t r i c t
Today’s Agenda
I.I. Introduction & Agenda OverviewIntroduction & Agenda Overview• District Commander Mike McCormick,
US Army Corps of Engineers
II.II. U.S. Army Corps of Engineers Project BackgroundU.S. Army Corps of Engineers Project Background• Tom Kendall, US Army Corps of Engineers
III.III. Review of Project Alternatives for Mainstem & TributariesReview of Project Alternatives for Mainstem & Tributaries• Ada Squires, Walter Yep , Inc.
IV.IV. Project Schedule Project Schedule • David Patterson, US Army Corps of Engineers
V.V. Questions & AnswersQuestions & Answers• Dave Dickson, MIG, Inc.
U.S. Army Corps of EngineersProject Background
U.S. Army Corps of EngineersS a n F r a n c i s c o D i s t r i c t
A long history of floods & planning efforts…A long history of floods & planning efforts…
Background Information
1966 Federal Flood Control Act authorizes new project
1974-5 Local community declines to support any identified project alternative
1982/6 Flooding occurs along Salsipuedes/Corralitos Creeks
1995 Major flood event breaches River levees; flows exceed capacity
1997 Flooding occurs along Corralitos Creek
1998 Flooding occurs on Pajaro River mainstem
1999 Pajaro River mainstem is combined with Salsipuedes/Corralitos Creek project
2001 U.S. Army Corps of Engineers agree to Community Planning Process
2002 Corps evaluating a range of alternatives including those emerging from the
Community Planning Process
National Economic Development (NED) PlanNational Economic Development (NED) Plan
Plan developed in complete detail to:
• Optimize flood damage reduction benefits consistent with protecting environmental quality.
Background Information
Federal InvestmentFederal Investment
• Benefits must exceed costs.
• Federal participation is capped by NED Plan.
Status of Vegetation Maintenance Plan
• Outcome of Operations & Management settlement will be considered in the final NED Plan.
• Roughness coefficient will not be less than value established in Interim Plan.
• Operations & Management manual to be developed after project construction.
Planning AssumptionsPlanning Assumptions
Selection of a Preferred Alternative
• Develop a NED Plan based on economic feasibility.
• Counties asked to comment and concur on preferred alternative(s).
• If local sponsors prefer a different plan, it is recognized as the Locally Preferred Plan.
• A recommended plan supported by the Local Sponsors is presented to Army Corps of Engineers Headquarters.
October 2002 through January 2003October 2002 through January 2003
Pajaro River Mainstem:Pajaro River Mainstem:
1. Raising in place
2. 100-foot set back
3. 225/100-foot setback
4. Floodwall in lieu of levee
5. Environmental corridor
Corps of Engineers Alternative Evaluation
Corralitos and Salsipuedes Creeks:Corralitos and Salsipuedes Creeks:
T1. Raise in place
T2. Setback
T3. Hybrid
Corps of Engineers Alternative Evaluation
Review of Project Alternativesfor Mainstem
U.S. Army Corps of EngineersS a n F r a n c i s c o D i s t r i c t
Alternative 1 Features: Floodwalls/Levee Raise in Place
Level of Protection: 30 years Land Impacted: 56 acres
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides •Vegetation Roughness:
Reach 1: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
•Reach 2: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 3: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 4:•Levee•No setbacks•Height: +4’•Vegetation: moderate
•Levee•No setbacks•Height: +4’•Vegetation: moderate
•Levee/Floodwall•No setbacks•Height: +4’•Vegetation: moderate
•Levee•No setbacks•Height: +4’•Vegetation: moderate
Cross Section Diagram: Floodwalls/Levee Raisein Place
Economic/Financial Feasibility: Floodwalls/Levee Raise in Place
LERRD’s $ 7.4 Construction 119.4E&D, S&A (15%) 19.0
Total Project Cost* $145.8
Annual Cost $ 10.4OMRR&R (1%) 1.2
Total Annual Cost $11.6
Benefits $15.8
Net Benefits $4.2
Benefit:Cost Ratio 1.36:1
Non-Federal Cost (25%) $36.4
* Total annual cost does not include environmental mitigation or cultural resource costs.
Preliminary Estimates in Millions:Preliminary Estimates in Millions:
Alternative 2 Features: 100-foot Setback
Level of Protection: 50 yearsLand Impacted: 290 acres plus
7 homes
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides •Vegetation Roughness:
Reach 1: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 2: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 3: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 4:•Levee•100’ setbacks•Height: 12’ (+5’)•Vegetation: variable
•Levee•100’ setbacks•Height: 12’ (+5’)•Vegetation: variable
•Levee•100’ setbacks•Height: 12’ (+5’)•Vegetation: variable
•Levee/Floodwall•No setbacks•Height: 7’/+4’•Vegetation: variable
Cross Section Diagram: 100-foot Setback
* Representative section; will actually vary by location.
Economic/Financial Feasibility: 100-foot Setback
LERRD’s $ 18.6 Construction 133.9E&D, S&A (15%) 22.9
Total Project Cost* $175.4
Annual Cost $ 12.7OMRR&R (0.6%) 0.8
Total Annual Cost $13.5
Benefits $16.1
Net Benefits $2.6
Benefit:Cost Ratio 1.19:1
Non-Federal Cost (25%) $43.9
* Total annual cost does not include environmental mitigation or cultural resource costs.
Preliminary Estimates in Millions:Preliminary Estimates in Millions:
Alternative 3 Features: 225/100-foot Setback
Level of Protection: 65 yearsLand Impacted: 330 acres plus
7 homes
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides •Vegetation Roughness:
Reach 1: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 2: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 3: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 4:•Levee•100’ setbacks•Height: 12’ (+5’)•Vegetation: variable
•Levee•100’ setbacks•Height: 12’ (+5’)•Vegetation: variable
•Levee•225’ setbacks•Height: 12’ (+5’)•Vegetation: variable
•Levee/Floodwall•No setbacks•Height: 6’/+4’•Vegetation: variable
Cross Section Diagram: 225/100-foot Setback
* Representative section; will actually vary by location.
Economic/Financial Feasibility: 225/100-foot Setback
LERRD’s $ 20.3 Construction 133.9E&D, S&A (15%) 23.1
Total Project Cost* $177.3
Annual Cost $ 12.8OMRR&R (0.6%) 0.8
Total Annual Cost $13.6
Benefits $16.8
Net Benefits $3.2
Benefit:Cost Ratio 1.24:1
Non-Federal Cost (25%) $44.3
* Total annual cost does not include environmental mitigation or cultural resource costs.
Preliminary Estimates in Millions:Preliminary Estimates in Millions:
Alternative 4 Features: Floodwall In-lieu of Levee
Level of Protection: 30 years Land Impacted: negligible
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides •Vegetation Roughness:
Reach 1:•Floodwall•No setbacks•Height:12’ (+24’ below)•Vegetation: moderate
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 4:•Floodwall•No setbacks•Height:12’ (+24’ below)•Vegetation: moderate
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 3:•Floodwall•No setbacks•Height:12’ (+24’ below)•Vegetation: moderate
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 2:•Floodwall•No setbacks•Height:12’ (+24’ below)•Vegetation: moderate
Cross Section Diagram: Floodwall In-lieu of Levee
Economic/Financial Feasibility: Floodwall In-lieu of Levee
LERRD’s $ 4.4 Construction 275.8E&D, S&A (15%) 42.0
Total Project Cost* $322.2
Annual Cost $ 23.0OMRR&R (1%) 2.8
Total Annual Cost $25.8
Benefits $15.8
Net Benefits -$10.0
Benefit:Cost Ratio 0.61:1
Non-Federal Cost (25%) $80.5
* Total annual cost does not include environmental mitigation or cultural resource costs.
Preliminary Estimates in Millions:Preliminary Estimates in Millions:
Alternative 5 Features: Environmental Corridor
Level of Protection: 25 yearsLand Impacted: 290 acres plus
7 structures
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides •Vegetation Roughness:
Reach 1: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 2: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 3: Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Reach 4:•Levee•100’ setbacks •Height: 12’ (+5’)•Vegetation: high
•Levee•100’ setbacks •Height: 12’ (+5’)•Vegetation: high
•Levee•100’ setbacks •Height: 12’ (+5’)•Vegetation: high
•Levee/Floodwall•No setbacks •Height: 7’/+4’•Vegetation: moderate
Cross Section Diagram: Environmental Corridor
* Representative section; will actually vary by location.
Economic/Financial Feasibility: Environmental Corridor
LERRD’s $ 18.6 Construction 133.9E&D, S&A (15%) 22.9
Total Project Cost* $175.4
Annual Cost $ 12.7OMRR&R (0.4%) 0.6
Total Annual Cost $13.3
Benefits $12.0
Net Benefits -$1.3
Benefit:Cost Ratio 0.90:1
Non-Federal Cost (25%) $43.9
* Total annual cost does not include environmental mitigation or cultural resource costs.
Preliminary Estimates in Millions:Preliminary Estimates in Millions:
Economic/Financial Feasibility Comparison(Preliminary Estimates in Millions): All Mainstem Alternatives
Alt 1Fwalls/Levee
Alt 2100’
Setback
Alt 3225/100’Setback
Alt 4Floodwall
Alt 5Env’l
Corridor
Total Project Cost
$145.8 $175.4 $177.3 $322.2 $175.4
Total Annual Cost
$11.6 $13.5 $13.6 $25.8 $13.3
Benefits $15.8 $16.1 $16.8 $15.8 $12.0
Net Benefits $4.2 $2.6 $3.2 -$10.0 -$1.3
Benefit:Cost Ratio
1.36:1 1.19:1 1.24:1 0.61:1 0.90:1
Non-Federal Cost (25%)
$36.4 $43.9 $44.3 $80.5 $43.9
LOP 30 yrs 50 yrs 65 yrs 30 yrs 25 yrs
Review of Project Alternativesfor Tributaries
U.S. Army Corps of EngineersS a n F r a n c i s c o D i s t r i c t
Concepts evaluated for hydraulic proficiency:Concepts evaluated for hydraulic proficiency:
T1. Raise in place
T2. Setback
T3. Hybrid
Flood Protection Concepts for the Creeks
Cross Section Diagram: Salsipuedes Creek
* Representative section; will actually vary by location.
Cross Section Diagram: Corralitos Creek
* Representative section; will actually vary by location.
Alternative T1 Features: Raise in Place
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides •Vegetation Roughness: n =
•Levee/Floodwall•No setbacks•Height: +3.5’/2’ (4’ below)•Vegetation: moderate to high•College Lake•LOP: 50 years•Land impacted: 12 acres
Highway 152 Bridge•Replaced
Green Valley Road Bridge•Replaced
Highway 129Bridge•Replaced
Economic/Financial Feasibility: Raise in Place
LERRD’s $ 6.5 Construction 24.0E&D, S&A (15%) 4.6
Total Project Cost* $35.1
Annual Cost $ 2.3OMRR&R (1%) 0.2
Total Annual Cost $2.5
Benefits $28.8
Net Benefits $26.3
Benefit:Cost Ratio 11:1
Non-Federal Cost (25%) $8.8
* Total annual cost does not include environmental mitigation or cultural resource costs.
Preliminary Estimates in Millions:Preliminary Estimates in Millions:
Alternative T2 Features: SetbackHighway 152 Bridge•Replaced
Green Valley Road Bridge•Replaced
Highway 129Bridge•Replaced
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides •Vegetation Roughness: n =
•Levee/Floodwall•100’ setbacks•Height: 5’/1’ (2’ below)•Vegetation: moderate to high•College Lake•LOP: 50 years•Land impacted: 65 acres & 17 structures
Economic/Financial Feasibility: Setback
LERRD’s $ 20.6 Construction 13.1E&D, S&A (15%) 5.1
Total Project Cost* $38.8
Annual Cost $ 2.5OMRR&R (1%) 0.1
Total Annual Cost $2.6
Benefits $28.8
Net Benefits $26.2
Benefit:Cost Ratio 11:1
Non-Federal Cost (50%) $19.4
* Total annual cost does not include environmental mitigation or cultural resource costs.
Preliminary Estimates in Millions:Preliminary Estimates in Millions:
Non-Federal Cost SharingNon-Federal Cost Sharing
• 25-50%
• Includes LERRD cost and 5% of project first cost
Economic/Financial Feasibility Information
September 12, 2002
Alternative T3 Features: HybridHighway 152 Bridge•Replaced
Green Valley Road Bridge•Replaced
Highway 129Bridge•Replaced
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides •Vegetation Roughness:
•Levee/Floodwall•150’ setbacks•Height: 8’/2’ (4’ below)•Vegetation: moderate •LOP: 100 years•Land impacted: 75 acres
Alternative T3 Features: Hybrid (continued)
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
Orchard Park:•Levee/Floodwall•No setbacks•Height: 7.5’/3’ (6’ below)•LOP: 100 years
Highway 152 Bridge•Replaced
Green Valley Road Bridge•Replaced
Highway 129Bridge•Replaced
Reach 1:•Floodwall/Levee Height: ft•Setback Distance: ft on both sides
College Lake:•Concrete channel•No setbacks•Height: 4’•LOP: 100 years
Economic/Financial Feasibility: Hybrid
LERRD’s $ 11.0 Construction 19.2E&D, S&A (15%) 4.5
Total Project Cost* $34.7
Annual Cost $ 3.1OMRR&R (1%) 0.2
Total Annual Cost $3.3
Benefits $29.7
Net Benefits $26.4
Benefit:Cost Ratio 9:1
Non-Federal Cost (37%) $12.7
* Total annual cost does not include environmental mitigation or cultural resource costs.
Preliminary Estimates in Millions:Preliminary Estimates in Millions:
Economic/Financial Feasibility Comparison(Preliminary Estimates in Millions): All Tributary Alternatives
Alt T1Raise in Place
Alt T2Setback
Alt T3Hybrid
Total Project Cost $35.1 $38.8 $34.7
Total Annual Cost $2.5 $2.6 $3.3
Benefits $28.8 $28.8 $29.7
Net Benefits $26.3 $26.2 $26.4
Benefit:Cost Ratio 11:1 11:1 9:1
Non-Federal Cost $8.8 (25%) $19.4 (50%) $12.7 (37%)
LOP 50 yrs 50 yrs 100 yrs
Alternatives with Best Potential (Preliminary Estimates): Comparing Range of Costs & Non-federal Dollars
Combination Alt 1 & T1 Alt 3 & T3
Total Project Cost $181 million $212 million
Non-Federal Cost $45 million $57 million
Level of Protection 30 & 50 yrs 65 & 100 yrs
Land Impacted 68 acres 405 acres + 7 homes
Project Schedule
U.S. Army Corps of EngineersS a n F r a n c i s c o D i s t r i c t
Project Schedule
1st 2nd 3rd 4th 1st 2nd 3rd 4th 1st 2nd 3rd 4th
2003 2004 2005
1st 2nd 3rd 4th4th
2006‘02
Develop Selected Plan(s)
USFWS Prepare HEP & dCAR
Prepare dEIS/R & dGRR
Public Review of dEIS/R
Prepare fEIS/R & fGRR
1st Construction Phase
Prepare Plans & Specs
1st Construction Period
2nd Construction Phase
Prepare Plans & Specs
2nd Construction Period
NED Plan Development Process
Task Date
• COE & local sponsors identifythe NED Plan February 2003
• Preferred plan(s) potentaillymodified by USFWS HEP/CAR July 2003
• COE & local sponsors distribute draft EIR/EIS for public review September 2003
• Public review period of draft EIR/EIS ends December 2003
• COE & local sponsors distributefinal EIS/EIR for public review June 2004
NED Plan Development Process (continued)
Task Date
• COE & local sponsors submit final EIR/EIS & GRR for approval July 2004
• Division Engineer’s Notice/ROD August 2004
• 1st Phase Construction begins July 2005
• 2nd Phase Construction begins May 2006
• Financial close-out & turn-overto local sponsors June 2007
Questions & Answers
U.S. Army Corps of EngineersS a n F r a n c i s c o D i s t r i c t
U.S. Army Corps of U.S. Army Corps of Engineers Planning Engineers Planning
Process MeetingProcess MeetingSeptember 12, 2002
U.S. Army Corps of EngineersS a n F r a n c i s c o D i s t r i c t
Reserve Slides
Project Alternatives – Mainstem
100-foot Setback
Alternative 2
Floodwalls/Levee-Raise In
Place
Alternative 1 Alternative 3
225/100 foot Setback
• Level of Protection: 30 yrs• Levee• No setbacks• Height: +4’• Vegetation: moderate
• Level of Protection: 50 yrs• Levee• 100’ setbacks• Height: 12’• Vegetation: variable
• Level of Protection: 65 yrs• Levee• 225/100’ setbacks• Height: 12’• Vegetation: variable
Project Alternatives – Mainstem
Environmental Corridor
Alternative 5
FloodwallIn-lieu of
Levee
Alternative 4
• Level of Protection: 30 yrs• Floodwall • No setbacks• Height: 12’ (+24’ below)• Vegetation: moderate
• Level of Protection: 25 yrs• Levee• 100’ setbacks• Height: 12’• Vegetation: high
Project Alternatives – Tributaries
Setback
Alternative T2
Raise in Place
Alternative T1 Alternative T3
Hybrid
• Level of Protection: 50 yrs• Levee/Floodwall• No setbacks• Height: +3.5’/2’ (4’ below)• Vegetation: moderate to high
• Level of Protection: 50 yrs• Levee/Floodwall• 100’ setbacks• Height: 5’/1’ (2’ below)• Vegetation: moderate to high
• Level of Protection: 100 yrs Levee/Floodwall
• 250’ setbacks• Height: 8’/2’ (4’ below)• Vegetation: moderate • College Lake & Orchard Park
included