A08_19R0024_PRE_SOL_CONF_SLIDES.pdf

METRO-EAST ST LOUIS

CUTOFF WALL

U.S. Army Corps of Engineers – St. Louis District

METRO-EAST ST LOUIS CUT OFF WALL

W912P9-19-R-0024

Pre-Solicitation Conference Date: 17 April 2019 Time: 0900 – 1200 Location: 1 Lock and Dam Way, East Alton, IL

Introduction

• Agenda

• Welcome! Have you checked in?

• Who we are?

• Why are we here?

AGENDA

0900-0910 – Opening Remarks, Introductions and Housekeeping (Kris Baker)

0910-0920 – Project overview (Mike

Feldman/Tracey Kelsey/Levee Sponsor)

0920-0930 – Geotechnical technical specifications (Chris Wheeler/Curtis Moore/Jose Lopez)

- Geology

- Anticipated methods of construction

- Stability analysis

0930-0950 – Bid schedule, general specs (Eric Piel/Chris Wheeler/Tony Jones)

- Options (stationing, lengths, restrictions, etc.)

- Dates to construct options

- Bid Schedule and Bid Notes

- Measurement and Payment

0950-1030 – Previously submitted questions/answers

1030-1045 – Break

1045-1200 – Open questions/answers

* Please hold all questions until after the break. *

WHAT IS A PRE-SOLICITATION CONFERENCE?

• A meeting held with potential Contractors prior to a formal solicitation.

• A market research method in which the Government can acquire an understanding of the current marketplace.

WHAT IS A PRE-SOLICITATION CONFERENCE?

• It is not:

• Any guarantee of any services or construction work;

• Any kind of agreement, promise or contract with any party.

PURPOSE OF PRE-SOLICITATION CONFERENCE:

• Advise Industry of the Government’s anticipated requirements.

• Assist the Government in understanding the capabilities of Industry.

• Obtain Industry’s input on the most effective means of meeting the Government’s requirements.

• Networking.

• Elicit the interest of prospective contractors.

DISCLAIMERS

• All information presented today, meeting minutes, meeting documentation, attendee list and questions and answers will be posted publically.

• All information presented today is for informational purposes only. This presentation is not a binding agreement or promise of work, implied or otherwise.

• This presentation is not a complete representation of the project.

Refer to the solicitation package for full project details.

GROUND RULES

• All potential contractors will be treated fairly and equitably, therefore:

• No information will be provided which would give one potential contractor an unfair competitive advantage over another.

• Do not release any proprietary information.

PROJECT OVERVIEW

SITE GEOLOGY

• Alluvial and Glacial Outwash deposits

• Fine Grained Clays and Silts on the surface

• Fine to course Sands and Gravels with depth

• Silty Sands, Clays, and Silts layer present approximately 40 to 50 foot depth

• Cobbles and Boulders are expected within the Sands and

Gravel layers >40 foot depth

• Bedrock approximately 120 to 140 feet deep

• Historically Industrial Area so buried obstructions are possible

TYPICAL GEOLOGIC PROFILE

TYPICAL SECTION GEOLOGY

14PRIMARY AND SECONDARY PANEL

CONSTRUCTION

ADJACENT TO A LEVEE

Primary panel excavation followed by secondary panel excavation.

ANTICIPATED METHODS OF CONSTRUCTION

3D STABILITY ANALYSIS

3D STABILITY ANALYSIS

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

F A

C T

O R

O F

S A

F E

T Y

PANEL LENGTH

979+80 20-ft Panel (72 pcf) 30-ft Panel (72 pcf) 20-ft Panel (68 pcf) 20-ft Panel (65 pcf)

1.1

1.2

1.3

1.4

1.5

1.6

1.7

18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 F

A C

T O

R O

F S

A F

E T

Y

PANEL LENGTH

1009+60 20-ft Panel (72 pcf) 30-ft Panel (72 pcf) 20-ft Panel (68 pcf) 20-ft Panel (65 pcf)

TYPICAL WORK PLATFORM AND CLAY CAP PLACEMENT

OPTION AREAS

• USACE is seeking Contractor input and ideas for a better path forward on the optional bid items.

• Base Item (Sta 0+00 to 24+23) – Anticipate contract duration of 18 months

• Option A-N (Sta 3+75 to 6+00) – Anticipate award within 120 days of award

• Option B (Sta 11+00 to 11+75) – Anticipate award within 120 days of award

• Option S (Sta 18+00 to 18+75) – Anticipate award within 365 days of award

• Option G (Sta 25+01 to 33+97 and 34+78 to 42+00) – Anticipate award within 365 days of award

• Option A-S (Sta 42+00 to 46+05) – Anticipate award within 365 days of award

• Ameren North (A-N):

• Sta 3+75 – 6+00

1. 15 Sept – 15 Nov

2. 15 Mar – 15 May

• Bungee (B):

• Sta 11+00 – 11+75

• 1-10 August

• Spire (S):

• Sta 18+00 – 18+75

• 1 April – 30 Sept

• General (G)

• Sta 25+01 – 33+97

• Sta 34+78 – 42+00

• General (G)

• Sta 25+01 – 33+97

• Sta 34+78 – 42+00

• Ameren South (A-S)

• Sta 42+00 – 46+05

1. 15 Sept – 15 Nov

2. 15 Mar – 15 May

UTILITIES

• Ameren North (A-N):

• Sta 3+75 – 6+00

• Bungee (B):

• Sta 11+00 – 11+75

• 1-10 August (preferred)

• Grain Elevator is approximately

+/- 8 ft wide.

• There are no distance restrictions.

• After award of Option B, the contractor would be allowed to work as close to the elevator as desired.

• Timing of the actual closure will be coordinated between the contractor and Bunge.

Cutoff Wall Centerline

• Bungee (B):

• Sta 11+00 – 11+75

• 1-10 August (preferred)

• Grain Elevator is approximately +/- 8 ft wide.

• There are no distance restrictions.

• After award of Option B, the contractor would be allowed to work as close to the elevator as desired.

• Timing of the actual closure will be coordinated between the contractor and Bunge.

• * Note the position of crane outrigger during the lift.

Riverside

Landside

Cutoff Wall (approx.)

• Spire (S):

• Sta 18+00 – 18+75

• 1 April – 30 Sept Proposed

Wall

• Spire (S):

• Sta 18+00 – 18+75

• 1 April – 30 Sept

• Abandoned line to be removed by contractor at cutoff wall location.

• Four (4) Gravity Drains:

• Will be abandoned and grouted before construction

• Corrugated Metal Pipe (CMP)

• Contractor is to remove portion of pipe in cutoff wall footprint

• More detail of the pipes will be provided in the solicitation

• Cost is anticipated to be incidental to cutoff wall construction

BID SCHEDULE / MEASURE AND PAYMENT

• Base (STA 0+00 to 24+23; excluding options)

• Standby Time

• Paid at a hourly rate

• Based on a 40 hr/week, 8 hr/day work schedule

• Contractor is to anticipate 30 days of high water work restrictions as incidental to construction. Delay days over 30 will be paid at a pre-negotiated rate.

• Test Section (STA 06+00 to 07+50)

• To be paid at the JOB unit rate

• Payment will be for 150 linear feet of cutoff wall

• Must include minimum two (2) closures

• Includes all work associated with the cutoff wall including geotechnical instrumentation and guidewalls

• Does NOT include panel coring

• Optional Item “G” (STA 25+01 to 33+97 and STA 34+78 to 42+00)

• Geotechnical Instrumentation Installation

• Paid at a job rate

• Includes three (3) inclinometers

• Optional Item “A-N” (STA 3+75 to 6+00)

• Optional Item “A-S” (STA 42+00 to 46+05)

• Optional Item “B” (STA 11+00 to 11+75)

• Optional Item “S” (STA 18+00 to 18+75)

• All similar in bid structure and measurement and payment

PREVIOUSLY SUBMITTED QUESTIONS/ANSWERS

Question 1

Q: Sheet B-209 has limestone at 218,064.7 PSI, is this correct?

Question 2

Q: Does the government have an on-site disposal area?

Question 3

Q: Where are the new PZs located and do any PZs require automated monitoring?

13 50 00 par 1.4 calls for pz real time monitoring.

Question 4

Q: Will there be a separate CLIN for instrumentation installation?

Question 5

Q: The standby time in the bid schedule is an hourly rate. Are we to assume that this rate is for 8 hours per day and 5 days per week?

Question 6

Q: The standby time in the bid schedule does not have the number of units. Is the requirement to only supply an hourly rate?

Question 7

Q: On drawing sheet C-302 - cross section - Sta 4+00 shows the platform at EL 429.5' on sheet C-107 the Platform is at El 429' at Station 4+00 - which is correct?

Question 8

Q: NAVD 1988 Sheet C-001 vs NGVD 1929 sheet R-001 - what is the conversion factor?

Question 9

Q: 00 00 10-8 par 9 - Each option has a Mob and Demob CLIN. If we have to Mob and Demob between options - this will be very expensive. Is the intent to remove all equipment and personnel between options?

Question 10

Q: 00 08 00 Par 1.3.g - "The plane of reference as used in these specifications is the zero stage of the St. Louis, Missouri, Mississippi River gage, Elevation 379.94 feet NGVD" - the web site say 0=379.58. Which is correct? Also the link in 1.3.d does not work.

Question 11

Q: SECTION 32 20 20 Par 3.4.L.2 "The bottom of each bite shall be cleaned utilizing the reverse circulation pump in the excavation equipment and by an airlift consisting of a 10 inch diameter pipe and a compressor capable of airlifting from depths of at least 160 ft.... " Should this not say or instead of and?

Question 12

Q: Very hard rock at bottom (i.e.: Drawing sheet 16-MESDCW-102), never found on WR1 and WR2. Given the Government’s concerns about the use of retardants and the great depths to be reached (similar to WR1 and WR2), we would like to know if the limitations on the use of such products can be relaxed.

Question 13

Q: Section 32 20 20, Para 3.4.P states that “Vertically shall be checked and recorded during excavation”. Para 3.4.P.a states that “a separate downward movement of the hydromill is required for the final survey”. Are both these mandatory? If the separate downward movement is required, there is a possibility of caving in the sand zones with the low SPTs.