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