Council Bluffs
Industrial Park Levee Accreditation
Kyle Tonjes, P.E.
Jared Olson, P.E.
Value Engineering
Workshop
Industrial Park Levee (IPL)
Background Information and 2011
Flood Fight
Industrial Park Levee (IPL)
204+00
224+00
A
236+00
B
244+00
C
D
Inland Flooding Between IPL and Federal Levee
IPL at Ameristar
IPL at Warren and Cargill
Levee Segment A
Original Study Recommendations:
• 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
New Levee
Alignment
Levee Segment B
Original Study Recommendations:
• Remove concrete
retaining wall and metal
bin wall
• Extend levee top
landward
• Raise earth
embankment
• Improve interior
drainage and replace
drainage pipe through
levee
Levee Segment C
Original Study
Recommendations:
• Embankment
protection
– Sheet pile wall
– Regrade levee
slope to 3:1
– Riprap to
normal high
river level
– Gravel above
normal high
river level
Levee Segment D
Original Study
Recommendations:
• New levee alignment
• Fill boat slip or
construct floodwall on
west side of boat slip
New levee
alignment
Value Engineering of Original
Study
PRE-WORKSHOP
Preparation Phase
Orientation Memo
Team Member Homework Research
Cost Estimating
TASK 2
VE WORKSHOP
Information Phase
Function Analysis Phase
Creative Phase
Evaluation Phase
Development Phase
Presentation Phase
TASK 3
TASK 1
Proposed VE Work Plan
POST-WORKSHOP
Owner/Designer Review of VE Comments
Implementation Meeting
Preparation of Final Report
Deliverables:
• Detailed VE Workshop
Agenda
• Homework
Assignments
Deliverables:
• Preliminary
VE Report
• Oral debriefing
to owner and
designer
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 11102-570 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 2
VE 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 2
VE 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 2
VE 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 2
VE 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
suggestions
Ideas that would normally be incorporated
into or considered during a levee design
 Ideas that had minor cost implications would
be better known during detailed design
Cost implications were minor but have
potential to affect O&M positively or
negatively.
Task 2
VE 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 2
VE 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 “floodproofing” 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