2025 LaGrange Industry Day PPT 26 Mar 2025.pdf

http://www.mvr.usace.army.mil/Missions/Navigation/NESP/

LaGrange New 1,200 Foot Lock Industry Day

Thomas E. Mack P.E.

INDC Technical Manager Thomas.E.Mack@usace.army.mil

Robert Maroney Project Manager Robert.Q.Maroney@usace.army.mil

US Army Corps of Engineers, Rock Island District Clock Tower Building PO Box 2004, Rock Island, IL

New 1200 Foot Lock at LaGrange Lock and Dam Industry Day 8 April 2025

Project Purpose

• PURPOSE:

To improve efficiency, operability, reliability, and safety for navigation traffic transiting the facility.

• KEY FEATURES:

New 1,200-foot navigation lock chamber landward of existing 600-foot lock chamber New upstream and downstream approach channels New lock will be constructed with minimal disruption to navigation traffic Existing 600-foot lock remains in operation during construction of new lock

• PROJECT BENEFITS:

REDUCED LOCKAGE TIMES: Lockages reduced from 2.5 hours to approximately 45 minutes, saving time and increasing efficiency.

INCREASED CAPACITY: The new lock could accommodate the largest tow configurations on the

Illinois Waterway, meeting the demands of the waterway.

ENHANCED RELIABILITY: The existing 600-foot lock chamber would remain operational after the new lock is constructed, providing added redundancy and minimizing downtime.

IMPROVED SAFETY: Professional mariners would no longer have to “split” tows to transit the chamber, reducing the risk of accidents and enhancing overall safety.

Project Location

Minnesota

Wisconsin

Iowa

Illinois

Missouri

PROJECT LOCATION

Existing 600ft Lock and Dam

• New 1,200-foot lock will be constructed in a cofferdam landward of the existing lock.

• Existing lock to remain operation during construction

• High water events at existing lock bring significant debris.

Existing Lock Wall Overtopping 6 Over Overtoppings in the last 3 years Top of Lock Wall – 433.63 ft NAVD88

Top of Lock Wall

LaGrange L&D Stage Duration Curve

Water is above the top of the lock wall approximately 20% of the time

Top of Lock Wall 433.63 ft NAVD88

Normal Pool

Normal Tail

LaGrange Duration Analysis Plot

Percent Time Exceeded

Top of Cofferdam

Top of Lock Wall

Percent Time Exceeded

El ev at io n (fe et

• Cofferdam height based on updated 1% annual chance exceedance

• Cofferdam Height

– 449.1 ft NAVD88

• Flood of record (2015)

– 447.8 ft NAVD88

• Top of lock wall

– 433.63 ft NAVD88

LaGrange Inundation Maps (80,000 CFS)

• Cofferdam height based on updated 1% annual chance exceedance

• Cofferdam Height

– 449.1 ft NAVD88

• Flood of record (2015)

– 447.8 ft NAVD88

• Inundation for 80,000 cfs Approx. 50% Annual Chance Exceedance

Existing Conditions Conditions with Cofferdam

Site Geology-New Lock Centerline

Clays

Sands

Limestone

Proposed Lock Floor

Project Status

• CURRENTLY ON PATH TO COMPLETION IN 2032

Depends on funding stream remaining consistent Received $20 million for design in FY22 Received $49.3 million for design & construction in FY23

• AE TASK ORDER

Site investigations – Complete Survey, Geotech Explorations, Environmental Compliance Surveys – Complete Charrettes – Complete Pre-35% Design – Complete

• AE TASK ORDER TO COMPLETE DESIGN AWARD 9/1/23

• HYDRAULIC DESIGN 11/22 – 9/23

Configuration of lock, guide walls and approaches Ice Mitigation

• AE Final Design – In Progress, 100% Final Design in February 2026

Project Features

NORTH

DISPOSAL PILE

UPSTREAM APPROACH

EXCAVATION

1200’ LOCK

Existing Lock

COFFERDAM

DISPOSAL PILE

MAINTENANCE

BLDG

ADMIN BLDGUPSTREAM

CONTROL

STATION

DOWNSTREAM

CONTROL

STATION

DOWNSTREAM GUIDE WALL

DOWNSTREAM

APPROACH

EXCAVATION

SOUTH

DISPOSAL PILEExisting Bldgs

UPSTREAM GUIDE

WALL

DOWNSTREAM

HPU BLDG

UPSTREAM HPU BLDG

BUBBLER

Construction Phasing

• Total Project has 5 Phases and Construction Contracts Phase I – HSS and Operating Machinery (UNDER CONTRACT) Phase II – Site Development and Utilities Phase III – Lock Excavation, Cofferdam and Foundations Phase IV – Lock, Guide Walls, and Supporting Facilities Phase V – Approach Channels, Site Work and Restoration

Phase II – Site Development and Utilities

Clearing and Grubbing Operations Road Utilities Demolition of Existing Utilities

LIMITS OF

CONSTRUCTION

LIMITS OF CLEARING

& GRUBBING

RELOCATE EXISTING SERVICE TRANSFORMER

INSTALL NEW SERVICE TRANSFORMER

EXISTING UTILITIES TO

BE DEMOLISHED

NEW OPERATIONS

ROAD

NEW UTILITIES

BORROW AREA FOR

OPERATIONS ROAD

Phase III – Lock Excavation, Cofferdam and Foundations

STOCKPILE

FOR LOCK BACKFILL

(backfill by Phase IV

SHEET PILE &

PILE STORAGE

YARD

OPERATIONS ROAD & UTILITIES TO REMAIN

( BY PHASE II CONTRACTOR)

INITIAL CONTRACTOR STAGING UNTIL

“PLATEAU” IS CONSTRUCTED

CONTRACTOR OFFICE

GOVERNMENT

OFFICE

CONTRACTORPARKING

PERMANENT

SHEET PILE

CELLS

DOWNSTREAM GUIDE WALL

UPSTREAM GUIDE WALL

SHEET PILE CELLS INSTALLED IN THE RIVER

(DEMOLISHED BY PHASE IV CONTRACTOR) CANTILEVER SHEET PILE SECTION OF

COFFERDAM

TEMPORARY DEMOLITION OF

SECTION OF OPERATIONS ROAD &

UTILITIES TO INSTALL GUIDE WALL

SHEET PILE

LOCK WALL FOUNDATION PILES & CUTOFF SHEET

PILES INSTALLED AT THE BOTTOM OF THE

EXCAVATION

SECTIONS OF GUIDE WALL LEFT FOR PHASE

IV TO FACILITATE CONSTRUCTION OF THE

LOCK

OVERTOPPING WEIR

STRUCTURE

LOWER SHEET PILE BECOMES

PERMANENT RIVER WALL CUT OFF

Phase IV – Lock, Guide Walls, and Supporting Facilities

LAYDOWN AREA

& STORAGE YARD

CONTRACTOR

OFFICE

CONTRACTORPARKING

DOWNSTREAM GUIDE WALL

& END CELL

UPSTREAM GUIDE WALL

& END CELL

BATCH PLANT

& MATERIALS

SCOUR PROTECTION

SCOUR PROTECTION

MAINTENANCE BLDG

ADMINISTRATION BLDG

LOCK CHAMBER

& FLOOR

HPU BLDGS

CONTROL STATIONS

PERMANENT ACCESS

ROADS

GOVERNMENT

OFFICE

Phase V – Approach Channels, Site Work and Restoration

Channel Approach Dredging/Excavation Spoil Piles

Boat Ramps Final Site Restoration

NORTH DISPOSAL PILE

UPSTREAM APPROACH EXCAVATION

DOWNSTREAM APPROACH

EXCAVATION

SOUTH DISPOSAL PILE

UPSTREAM BOAT RAMP

DOWNSTREAM BOAT RAMP

Construction Schedule

Phase I: October 2024 – October 2027 (UNDER CONTRACT) Phase II: October 2025 – April 2026 Phase III: May 2026 – February 2029 Phase IV: February 2029 – October 2032 Phase V: November 2029 – August 2031

Details of Phase I HSS and Operating Machinery - AWARDED

• Phase I – HSS and Operating Machinery - Awarded Provided to Phase IV contractor as Government Furnished Equipment HSS Gates – Similar to 600ft Lock Major Rehab

—Miter Gates —Tainter Gate Culvert Valves —Culvert Bulkheads

— Ice Port Gate Valves

Operating Machinery – Similar to 600ft Lock Major Rehab —HPUs —Miter Gate Operators and Support Frames —Culvert Valve Operators and Support Frame

— Ice Port Gate Valve Operators

Details of Phase II Site Development and Utilities

Clearing and Grubbing Operations Road Utilities Demolition of Existing Utilities

LIMITS OF

CONSTRUCTION

LIMITS OF CLEARING

& GRUBBING

RELOCATE EXISTING SERVICE TRANSFORMER

INSTALL NEW SERVICE TRANSFORMER

EXISTING UTILITIES TO

BE DEMOLISHED

NEW OPERATIONS

ROAD

NEW UTILITIES

BORROW AREA FOR

OPERATIONS ROAD

Site Development and Utilities

Environmental and Permitting Requirements

Environmental Requirements The Supplemental Environmental Assessment prepared for this project addresses impacts to environmental resources. The following outlines agency or contractor requirements:

The USACE will be responsible for addressing the mitigation for impacted environmental resources; this is still being planned but will be in place as necessary for each contract package.

• Impacted resources include, wetlands, threatened and endangered species and their habit.

Site Development and Utilities

Environmental Requirements Continued… The contractor will be required to adhere to the following:

• Removal of trees greater than 3 inches in diameter will only to be allowed between Oct 1 and March 31.

• Between the April 1 - October 31 timeframe, work zone lighting must be directed downward and pointed away from forested areas to minimize disturbance to protected bat species at night.

• Seeds from the Decurrent False Aster plants will be collected by USACE staff in the fall of 2025. Areas where these plants are growing within the project limits and from which seed is planned to be collected will be marked as no intrusion areas on the plans.

• No Eagle nests have been found with the project limits. As work progresses, should one be discovered within 660 feet of the construction zone, the work will stop until further coordination with the UW Fish and Wildlife Service has occurred.

Site Development and Utilities

Environmental Requirements Continued… The contractor will be required to adhere to the following:

• Previously used equipment and watercraft will be required to be cleaned prior to bringing it onto or removing it from the site to prevent the spread of invasive species.

• Significant historical sites have been identified within the project limits. A Programmatic Agreement between USACE, Illinois SHPO, the Miami Tribe of Oklahoma, and the Osage Nation has been developed.

This agreement documents how identified sensitive areas will be addressed before, during, and after construction.

• If petroleum impacted soil or groundwater is encountered during construction, further investigation and evaluation may be required;

contaminated materials will be properly handled and disposed.

Site Development and Utilities

Environmental Requirements Continued… The contractor will be required to adhere to the following:

• Conduct work during winter months, as able, to reduce impacts to navigation.

• Federal, state, and local air resource requirements to minimize impacts to air quality.

• Illinois Pollutant Discharge Elimination permit and accompanying Stormwater Pollution Prevention Plan

• Section 401 Water Quality Certification issued by the ILDNR.

• Excavated material will be available for free public beneficial use.

Site Development and Utilities

Permitting Requirements The following permits will be handled by USACE staff. Contract specifications will include and conditions that must be followed.

• Section 10 and 404, verified for compliance by USACE

• Section 401, filed by USACE

• Floodway Permit, filed by USACE

• Dam Permit Modification, filed by USACE

• LOMR and CLOMR, being determined, to be filed by USACE

• County Road Entrance Permit, filed by USACE

The following permits will be handled by the Contractor

• NPDES Construction Permit

Site Development and Utilities

Clearing and Grubbing —Majority of clearing to be completed in this phase (42 Acres) —Clearing between October 1st and March 31st only —Preparing site for grading and stockpile areas in Phase III and IV

Site Development and Utilities

Operations Road —Grading for Operations Road —Onsite borrow —Stripping for road area – remain onsite

— 1,700 cy excavation

— 8,200 cy fill

Site Development and Utilities

Operations Road —Paving: concrete 8" thick pavement —Concrete surface for entire length

Site Development and Utilities

Utilities —Sanitary, Water, Storm —Electric —Telecommunication —Demolition and abandonment of existing after installation of new lines

—Congested utility corridor between existing lock wall and future cofferdam sheet piling

Site Development and Utilities

Utilities —Relocate existing 500kVA transformer —Provide new 1500kVA transformer

Estimated Construction Loads

Utilities

— Keep existing 600' Lock operational loads and metering separate from construction loads.

— 1500kVA transformer to be new utility transformer for new 1200' lock distribution system.

— Third transformer required for construction loads to run concurrently with site distribution in Phase 4.

Construction Electrical Loads

— Loads are estimated. Feedback on estimated loads

Details of Phase III Lock Excavation, Cofferdam and Foundations

STOCKPILE

FOR LOCK BACKFILL

(backfill by Phase IV

SHEET PILE &

PILE STORAGE

YARD

OPERATIONS ROAD & UTILITIES TO REMAIN

( BY PHASE II CONTRACTOR)

INITIAL CONTRACTOR STAGING UNTIL

“PLATEAU” IS CONSTRUCTED

CONTRACTOR OFFICE

GOVERNMENT

OFFICE

CONTRACTORPARKING

PERMANENT

SHEET PILE

CELLS

DOWNSTREAM GUIDE WALL

UPSTREAM GUIDE WALL

SHEET PILE CELLS INSTALLED IN THE RIVER

(DEMOLISHED BY PHASE IV CONTRACTOR) CANTILEVER SHEET PILE SECTION OF

COFFERDAM

TEMPORARY DEMOLITION OF

SECTION OF OPERATIONS ROAD &

UTILITIES TO INSTALL GUIDE WALL

SHEET PILE

LOCK WALL FOUNDATION PILES & CUTOFF SHEET

PILES INSTALLED AT THE BOTTOM OF THE

EXCAVATION

SECTIONS OF GUIDE WALL LEFT FOR PHASE

IV TO FACILITATE CONSTRUCTION OF THE

LOCK

OVERTOPPING WEIR

STRUCTURE

PERMANENT RIVER WALL CUT OFF

Lock Excavation, Cofferdam and Foundations

Excavation of soil within cofferdam area Stockpile excavated material on site for later use Soils testing and report available to contractors

APPROX. BOTTOM

OF COFFERDAM

EXCAVATION

(DOWNSTREAM)

APPROX. BOTTOM

OF COFFERDAM

EXCAVATION

(UPSTREAM)

Lock Excavation, Cofferdam and Foundations

Cofferdam Construction

—Cantilever Sheet Pile —Dual Cantilever Sheet Pile

—Cellular Sheet Pile —Earthen Berm

COFFERDAM

SHEET PILE CUTOFF

DRIVEN TO BEDROCK

LOCK PERMANENT

SHEET PILE CUTOFF

DRIVEN TO BEDROCK

GUIDE WALL

SHEET PILE

OMMITTED FROM

PHASE III TO

ALLOW FOR LOCK

CONSTRUCTION

INSTALLED IN

PHASE IV

Lock Excavation, Cofferdam and Foundations

Cofferdam Construction —Upstream

Lock Excavation, Cofferdam and Foundations

Cofferdam Construction

—Cantilever Sheet Pile

OPERATIONS ROAD

COMPACTED EXCAVATED

MATERIAL TO EL. 440.0

COFFERDAM EXCAVATION

TOP/COFFERDAM

EL. 449.10

NEW LOCK INTERMEDIATE WALL (PHASE IV)

PILE DRIVEN TO ROCK

+/- 370.0

PILE DRIVEN TO ROCK

+/- 370.0

50’-0”

COFFERDAM

EXCAVATION AT

A 3H:1V SLOPE

84’-0” 18’-0”

UTILITIES

(PHASE II)

PERMANENT CUTOFF WALL

Lock Excavation, Cofferdam and Foundations

Cofferdam Construction

—Earthen Berm

+/- EL. 438.0 APPROXIMATE EXTENTS OF

EXCAVATION (PHASE III)

BACKFILL (PHASE IV)

+/- EL. 433.63

ADMINISTRATION BLDG

(PHASE IV)

EXISTING GRADE SLOPES UP

FROM +/- EL. 434

TO +/- EL. 440.0

WHERE EXCAVATED MATERIAL

“PLATEAU” MEETS EXISTING

GRADE NEAR COUNTY ROAD

NEW LOCK LAND WALL

PILES (PHASE III)

CONCRETE MONOLITH (PHASE IV)

TOP OF EARTHEN BERM (BEYOND)

PART OF COFFERDAM

LEVEL OF PROTECTION: +/- EL. 449.10

SHEET PILE SECTION OF COFFERDAM BEGINS AT

GUIDE WALL (ALIGNED WITH FACE OF LOCK WALL)

LEVEL OF PROTECTION: +/- EL. 449.10

Dewatering System

— Consists of

• Sheet pile driven to bedrock

• A series of approximately 20 well points along the chamber side of the new lock intermediate wall & the benched land side slope —Final design of dewatering system by the Phase III Contractor —Electrical service for dewatering system pumps by Phase II

Contractor —Operation & maintenance of the dewatering system to be transferred to the Phase IV Contractor as part of the Phase III Close Out

—Operation & maintenance of the dewatering system to be the responsibility of the Phase IV Contractor for the remainder of the lock construction

Details of Phase III Lock Excavation, Cofferdam and Foundations

W

EL

L

DE

PT

H

VA

RI

ES

6’ -0

1’

-0

1’-4”

1’ -6

GROUT

BACKFILL

BETONITE

CHIPS

8” DIA. RISER

’-0

WIRE

WRAPPED

CONT.

SLOT

SCREEN

Overtopping Control Weir —Flood barriers are removed to allow the cofferdam to flood before an overtopping event

Lock Excavation, Cofferdam and Foundations

Lock Excavation, Cofferdam and Foundations

Foundation Pile Installation —HP 14x89 Piles driven 30’ to bedrock —Sheet pile cutoff driven to bedrock

SHEETPILE

CUTOFF

4 ROWS OF

H PILES

Details of Phase IV Lock, Guide Walls, and Supporting Facilities

Batch Plant & Contractor Facilities Lock Chamber Concrete Installation of Steel Fabrications from Phase I Guide Walls & End Cells

GOVERNMENT

OFFICE

LAYDOWN AREA

& STORAGE

YARD

1.7 ACRES

CONTRACTOR

OFFICE

CONTRACTOR PARKING

DOWNSTREAM GUIDE WALL

& END CELL

UPSTREAM GUIDE WALL

& END CELL

BATCH PLANT

& MATERIALS

2.5 ACRES

SCOUR PROTECTION

SCOUR PROTECTION

MAINTENANCE BLDG

ADMINISTRATION BLDG

LOCK CHAMBER

& FLOOR

HPU BLDGS

CONTROL STATIONS

PERMANENT ACCESS

ROADS

Lock, Guide Walls, and Supporting Facilities

Supporting Buildings Controls, Communications, and Monitoring Excavation & Dismantling of the Cofferdam

GOVERNMENT

OFFICE

LAYDOWN AREA

& STORAGE

YARD

1.7 ACRES

CONTRACTOR

OFFICE

CONTRACTOR PARKING

DOWNSTREAM GUIDE WALL

& END CELL

UPSTREAM GUIDE WALL

& END CELL

BATCH PLANT

& MATERIALS

2.5 ACRES

SCOUR PROTECTION

SCOUR PROTECTION

MAINTENANCE BLDG

ADMINISTRATION BLDG

LOCK CHAMBER

& FLOOR

HPU BLDGS

CONTROL STATIONS

PERMANENT ACCESS

ROADS

Lock, Guide Walls, and Supporting Facilities

Batch Plant & Contractor Facilities —Batch Plant vs. Redimix —Power

• Service transformers installed in Phase II

• Site Distribution Estimated Loads – 1 MVA

• Construction (Contractors) estimated Loads:

Concrete Batch Plant - 1MVA.

Central Air Compressor - 200kVA.

—Water /tanks —Ice plant —Available space for laydown areas & staging —Access —Unloading Pier —Other anticipated needed facilities?

Lock, Guide Walls, and Supporting Facilities

Lock Chamber Concrete —Lock Wall Monoliths —Lock Floor Features (sills, floor struts, lock floor) —Debris Protection Structures

Lock, Guide Walls, and Supporting Facilities

Lock Wall Monoliths —CIP Concrete —12’-6” Square Fill-Empty Culvert —HP-Pile Foundation – Piles Founded On Bedrock

Lock, Guide Walls, and Supporting Facilities

Lock Wall Monoliths

Lock, Guide Walls, and Supporting Facilities

Lock Wall Monoliths

Lock, Guide Walls, and Supporting Facilities

—CIP Concrete Bulkhead Sills —CIP Concrete Miter Gate Sills —CIP Concrete Lock Floor Struts —CIP Concrete Lock Floor

Lock Floor Features

Lock, Guide Walls, and Supporting Facilities

Debris Protection Structures —Lock Site Floods during Winter Closure —Protection piers and frames prevent damage to hydraulic gate operators from floating debris impacts

Guide Walls —Downstream Guide Wall = 1056 ft long -Upstream Guide Wall = 912 ft long

Details of Phase IV Lock, Guide Walls, and Supporting Facilities

CONCRETE CAP

TIEBACK

SHEET PILE

ANCHORAGE

PILES

H PILE

End Cells —Pile supported sheet pile cell with concrete cap —40 feet in diameter

Details of Phase IV IV Lock, Guide Walls, and Supporting Facilities

END CELL

CONCRETE CAP

SUPPORT

PILES

GUIDE WALL

CONCRETE CAP

RETAINED

SOIL FROM

CELLULAR

SHEET PILE

SHEETPILE

Lock, Guide Walls, and Supporting Facilities

Supporting Buildings —Upstream & Downstream Control Stations —Maintenance Building

Maintenance Building Elevations Control Station Elevations

Lock, Guide Walls, and Supporting Facilities

Supporting Buildings —Upstream & Downstream HPU Buildings —Administration Building

Administration Building Elevations HPU Building Elevations

Lock, Guide Walls, and Supporting Facilities

• Installation of Government Furnished Equipment Phase I Hydraulic Steel Structures and Operating

Equipment

Lock, Guide Walls, and Supporting Facilities

• Installation of Government Furnished Equipment Phase I Hydraulic Steel Structures and Operating Equipment

Lock, Guide Walls, and Supporting Facilities

Controls, Communications, and Monitoring —PLC Based Control System

• Includes Replacement of Control System at Existing Lock —Operator Consoles in Each of the Control Station Buildings —Ethernet based Communications System with Fiber Optics —CCTV System for Operations Monitoring and Security

Approach Channels, Site Work and Restoration

Excavation & Dismantling of the Cofferdam —Upstream and downstream approaches excavation —Placement of riprap —Removal of cantilever sheet pile —Demolition of cells to final elevation —Removal of cells in the river

UPSTREAM APPROACH

EXCAVATION

DOWNSTREAM APPROACH

EXCAVATION

Phase V – Approach Channels, Site Work and Restoration

Channel Approach Dredging/Excavation

Spoil Piles

Boat Ramps Final Site Restoration

NORTH DISPOSAL PILE

UPSTREAM APPROACH EXCAVATION

DOWNSTREAM

APPROACH EXCAVATION

SOUTH DISPOSAL PILE

UPSTREAM BOAT RAMP

DOWNSTREAM BOAT RAMP

EX LOCK DISPOSAL PILE

Channel Approach Excavation

—Upstream and Downstream excavation and dredging to construct approach channels to lock constructed in Phase IV

—Current design assumes mechanical excavation methods

Details of Phase V Approach Channels, Site Work and Restoration

Approach Channels, Site Work and Restoration

Spoils Piles —Excavated materials to be placed at locations on site —North and south stockpiles —Approximately 2.35 million cubic yards of material

NORTH DISPOSAL PILE

APPROX 35' TALL

SOUTH DISPOSAL PILE

APPROX 32' TALL

LOCK MATERIAL PILE

Approach Channels, Site Work and Restoration

Work items —North Boat Ramp —South Boat Ramp —Riprap Placement

Site Restoration —Seeding of Spoils Piles —Wetland seeding in localized areas —Seeding of other disturbed areas

Data Management Program

Specification will state requirements on what to collect, how to store (ASCII, CSV or with MS Excel), how to export thru a secure FTP site, timeframes for presenting the information (from instantaneous to 72 hours)

• Contract will specify a Data Manager and Assistant whose sole responsibility will be to oversee the Contractor's Data Management System stipulated.

• This is in addition to RMS requirements for testing data.

• Allows for storage and access of data in real time during construction.

Mega Projects including Montgomery Lock and Soo Lock Require a Data a Management Program

Concrete Requirements

• Contractor will be required to provide a Thermal Control Plan for Lock Structures

• Concrete placement and curing procedures must meet ACI thermal limits for maximum temperature and maximum temperature differential.

Funds Management/Acquisition Strategy

Given that it is likely that the funding will come to this project over several years.

What are some approaches to manage funding shortfalls?

• Multiple Contracts

• Base Contracts – Option periods

• Continuing Contracts/Incremental Funding Clauses

Funds Management/Acquisition Strategy

FFP-Firm Fixed Price IFB- Invitation for Bid BV- Best Value (With Trade Offs or Least Price Technically Acceptable

Multiple Contracts

• Regarding project phasing, what are your thoughts on separating the current phases into individual contracts?

• What are the typical field office overhead rate differences between a $100 million contract and a $500 million contract?

• If we divide the project into ten phases, what is the estimated cost impact compared to the current phasing structure?

• What would be the estimated cost savings if we were to combine Phases 3, 4, and 5?

Base Contracts with Options

Description Option PeriodBase + Option

Contract Base: Construction of Cofferdam, Land wall and River wall. N/A

Option 1: Guard walls 1095 Days (3 Years) Option 2: Sills and Floors 1460 Days (4 Years)

Option 3: Hydraulic Steel Structures: Gates, Valves Bulkheads etc, 1460 Days (4 Years)

Option 4: Buildings, Lock electrical and Mechanical Equipment (Plumbing Systems) 1825 Days (5 Years)

Option 5: Removal of the Cofferdam 2555 Days (7 Years)

Option 6: Site and Groundwork, road paving, site Restoration. 365 Days

Other Project with Base and Options.

• What premium is typically applied to optioned items in a contract?

• What are the advantages and disadvantages of including option periods in contracts, from both the client's and contractor's perspectives?

• What is the typical duration of option periods in your experience? At what point in an option period's length do contractors typically begin to factor significant risk premiums into their pricing?

• Are there alternative approaches or best practices for improving option pricing mechanisms, especially for multi-year options, that could mitigate risk and incentivize both parties?

Continuously & Fully Funded Contracts

Expenditures (Millions)

Start Finish 2024 2025 2026 2027 2028 2029 2030 2031 2032 Totals

Phase 1 01-Oct-24 30-Oct-27 $2 $8 $8 $6 $24

Phase 2 31-Oct-25 27-Apr-26 $8 $15 $24

Phase 3 28-May-26 20-Feb-29 $48 $80 $81 $11 $220

Phase 4 21-Feb-29 12-Oct-32 $184 $214 $214 $168 $780

Phase 5 05-Nov-29 20-Aug-31 $22 $139 $89 $250

Totals $2 $16 $71 $87 $81 $217 $353 $303 $168 $1,297

Fully Funded $24 $24 $220 $1,030

Possible Funding outline shown below:

What are the advantages of incremental funding What are the concerns:

Acquisition Strategy

• Does the construction sequencing/approach seem reasonable? Any suggestion to make the approach more efficient?

• Contract acquisition types?

• Best Value with Tradeoffs (BV)

• Lowest Price Technically Acceptable (LPTA)

• Invitation for Bid (IFB)

• How long would you require (30/45/60 days) to prepare a responsive proposal to a construction contract solicitation?

• What do contractors see as the largest risks with this project(s)?

• What some mitigation approaches

Questions

Our goal is to prepare contract plans that are buildable and biddable.

Contractors who have bid on plans, have worked on USACE projects, or are considering bidding on the future LaGrange Lock plans are being asked to provide feedback that will aid in this goal.

Please consider answering the following questions to provide information that will help us and may help you.

• The second transformer installed under the contract work will be used to provide the power needed by the contractor for all construction activities.

o The bill for the power will be paid by the contractor.

o What is the maximum usage anticipated by the contractor that the designers should use to size this transformer?

Some of the major construction loads include: construction trailers, well water pumps, dewatering pumps, concrete batch plant, guide wall pumps, and central air compressors.

Questions

• Does the construction sequencing/approach seem reasonable? Any suggestion to make the approach more efficient?

• Concrete materials availability?

• Driving flat sheet piles ~80ft?

• Flood risk?

Cofferdam height vs flood recovery effort

• What do contractors see as the largest risks with this project(s)?

• How often should we have industry days?

Should we have online and face to face industry days?