council bluffs industrial park levee accreditation value engineering workshop kyle tonjes, p.e....
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Council BluffsIndustrial Park Levee Accreditation
Value Engineering Workshop
Kyle Tonjes, P.E.Jared Olson, P.E.
Industrial Park Levee (IPL) Background Information and 2011
Flood Fight
Industrial Park Levee (IPL)
A B C
D
204+00 224+00 236+00 244+00
253+00
Inland Flooding Between IPL and Federal Levee
IPL at Ameristar
IPL at Warren and Cargill
Levee Segment A
• Re-align levee for flood fight access
• Armor riverward levee slope
• Remove concrete barriers
• Increase levee height (station 205+00)
• Improve interior drainage and replace drainage pipes through levee
Original Study Recommendations:
New Levee Alignment
Levee Segment B
• Remove concrete retaining wall and metal bin wall
• Extend levee top landward
• Raise earth embankment
• Improve interior drainage and replace drainage pipe through levee
Original Study Recommendations:
Levee Segment C
• Embankment protection – Sheet pile wall– Regrade levee
slope to 3:1– Riprap to
normal high river level
– Gravel above normal high river level
Original Study Recommendations:
Levee Segment D
• New levee alignment• Fill boat slip or
construct floodwall on west side of boat slip
Original Study Recommendations:
New levee alignment
Value Engineering of Original Study
Proposed VE Work Plan
PRE-WORKSHOPPreparation PhaseOrientation Memo
Team Member Homework ResearchCost Estimating
VE WORKSHOPInformation Phase
Function Analysis PhaseCreative Phase
Evaluation PhaseDevelopment PhasePresentation Phase
TASK
1TA
SK 2
Deliverables:• Detailed VE Workshop
Agenda• Homework
Assignments
Deliverables:• Preliminary
VE Report• Oral debriefing
to owner and designer
POST-WORKSHOPOwner/Designer Review of VE Comments
Implementation MeetingPreparation of Final ReportTA
SK 3 Deliverables:
• Help owner/designer decide on VE Proposals’ disposition
• Final VE Report
VE Team
Workshop: Information Phase• Activities
– Presentation of original study background and findings by the City
– Q & A discussion between workshop participants, City, and levee sponsors
– Site tour with levee sponsors• Outcomes
– Design Criteria: FEMA 44 CFR.65.10 accreditation adequate vs. USACE ETL 1110-2-570 and inclusion in PL 84-99 program
– List of goals and expectations for the levee program
– List of major issues as viewed by the sponsors
Task 2VE Workshop
Workshop: Function Phase
• Activities– Break down the project into basic functional
• Outcomes– Five basic functions were identified for the
levee project Stabilize Embankment Protect Embankment Increase Freeboard Prevent Backflow Drain Stormwater
Task 2VE Workshop
Workshop: Creative Phase
• Activities– Brainstorming of ideas for each function
group– Judgment of ideas is discouraged at this
point, a wide range of ideas is sought– Not judging ideas immediately is difficult, but
doing so keeps the creative process flowing• Outcomes
– Development of a long list of ideas for each function group aimed at enhancing the original study proposals At this point the list of ideas is raw, some
items may be duplicated under multiple function groups, etc.
Task 2VE Workshop
Workshop: Judging Phase• Activities
– Develop screening criteria Increase level of protection Potential to minimize cost Strong technical solution Potentially acceptable to levee Sponsors and
does not impact operations Enhances O&M
– Each VE Team member evaluates each idea based on screening criteria and votes for ideas that should be further considered
– Members may also reject ideas that are not believed to satisfy a majority of the screening criteria
– The facilitator then leads a discussion to resolve conflicts
Task 2VE Workshop
Workshop: Judging Phase (Cont)• Outcomes
– List of ideas that will be carried forward for further development and cost estimating Ideas can be grouped and combined Rejected items are dropped Some items are judged to be equivalent to
the original design (report)– Some ideas are classified as future design
suggestionsIdeas that would normally be incorporated
into or considered during a levee design Ideas that had minor cost implications would
be better known during detailed designCost implications were minor but have
potential to affect O&M positively or negatively.
Task 2VE Workshop
Workshop: Development Phase• Activities
– Develop the concept for each chosen idea into a complete VE Proposal Develop full proposal description and
advantages and disadvantages Estimate quantities Estimate cost and compare to original study Prepare sketches or other backup
information to document the proposal Group compatible proposals
• Outcomes– List of fully developed VE proposals and the
cost implications of each– The proposals were presented to the levee
Sponsors and the City at the end of the Workshop
Task 2VE Workshop
Major VE Proposals
High Ground Option
• Certify Ameristar Hotel area as high ground (LOMR-F)
– All areas where structural fill was placed to required height above 100-year WSE
– Levee ties in at south and east sides of high ground
– Eliminates concerns about utility locations
– Will require verification that basement meets “flood-proofing” requirements
Other Proposals
• Reconstruct drainage pipes through levee– This is consistent with original study
• Eliminate sheet pile toe wall along Ameristar in Segment C
– Review of topographic survey and bathymetric survey shows 3:1 slope achievable without sheet pile
• Seed riverward slopes in Segments A & B instead of armoring with gravel/cobble
– Velocities appear low enough above normal high bank to not require slope protection beyond seeding
• Do not move levee west in Segment A– Building clearances from levee toe adequate for
44 CFR 65-10
Discussion/Questions