Amendment 0002 W912P825B0024.pdf

USACE, CONTRACTING DIVISION

ATTN: CEMVN-CT, ROOM 172

7400 LEAKE AVE.

NEW ORLEANS LA 70118-3651

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15A. NAME AND TITLE OF SIGNER (Type or print)

30-105-04EXCEPTION TO SF 30

APPROVED BY OIRM 11-84

STANDARD FORM 30 (Rev. 10-83) Prescribed by GSA

FAR (48 CFR) 53.243

The above numbered solicitation for West Shore Lake Pontchartrain, Louisiana Hurricane and Storm Damage Risk Reduction Project, WSLP-114, Reserve Relief & I-55 Pump Stations and Drainage Structures, is hereby amended as follow s:

- Bid opening date has changed from 28 April 2025 to 20 May 2025 at 10:00 am CST.

- Reopen the question and answ er period. Questions are due by 30 April 2025 no later than 2:00 PM CST. (NOTE: If you submitted questions after the original due date and they w ere rejected you w ill need to resubmit)

- Provide answ ers to contractor questions.

- Provide updates specifications and draw ings

- Provide updated Bid schedule

1. CONTRACT ID CODE PAGE OF PAGES

1 203

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

16C. DATE SIGNED

BY 24-Apr-2025

16B. UNITED STATES OF AMERICA15C. DATE SIGNED15B. CONTRACTOR/OFFEROR

(Signature of Contracting Officer)(Signature of person authorized to sign)

8. NAME AND ADDRESS OF CONTRACTOR (No., Street , County, State and Zip Code) X W912P825B0024

X 9B. DATED (SEE ITEM 11)

27-Feb-2025

10B. DATED (SEE ITEM 13)

9A. AMENDMENT OF SOLICITATION NO.

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

X The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offer X is extended, is not extended.

Offer must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended by one of the following methods:

(a) By completing Items 8 and 15, and returning 1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

or (c) By separate letter or telegram which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN

REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(B).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

E. IMPORTANT: Contractor is not, is required to sign this document and return copies to the issuing office.

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

10A. MOD. OF CONTRACT/ORDER NO.

2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO.(If applicable)

6. ISSUED BY

3. EFFECTIVE DATE

24-Apr-2025

CODE

CONTRACTING DIV- CHIEF

7400 LEAKE AVENUE, ROOM 172

NEW ORLEANS LA 70118-3651

W912P8 7. ADMINISTERED BY (If other than item 6)

4. REQUISITION/PURCHASE REQ. NO.

CODE W912P8

FACILITY CODECODE

EMAIL:TEL:

W912P825B0024

SECTION SF 30 BLOCK 14 CONTINUATION PAGE

SUMMARY OF CHANGES

SECTION SF 30 - SF 30 CONTINUATION

The following have been added by full text:

QUESTIONS AND ANSWERS

Question 1: I came across the West Shore Pontchartrain job but didn't see any bidders listed. We'd love to offer some pricing for the steel material (AZ52-700s, 24"x.75 pipe, etc.) Do you have a bidders list and a bill of quantities I can review?

Answer: The site visit sign in sheet was provided under Amendment 0001. Any issues with viewing the Interested parties list in SAM will have to be addressed through the SAM Federal Help Desk.

Question 2: Please provide the insurance requirements and limits that the contractor should carry for this solicitation?

Answer: The government does not determine specific insurance limitations Question 3: Will USACE please confirm the Small Business Participation goals?

Answer: We do not provide specific participation goals. A small business subcontracting plan will be requested from the apparent low bidder in accordance with 52.219-9 Alt I

Question 4: I reviewed the specifications and drawings and there are some differences between dimensions found in the drawings and the louver schedule. To provide an accurate estimate I am looking for clarification between the two. I am also trying to confirm if all the louvers require dampers.

Answer: Louvers schedules on HVAC drawings shall be used for dimensions and damper requirements.

Specification section 23 00 00 shall be used for louvers' specification.

Question 5: With review section 35 45 01 2.1 advises the maximum engine HP shall be 3,000 HP and then section 41 65 10.00 1.3.2 advises minimum engine power shall be 3,000 hp. Can you advise if a lower HP engine will be acceptable or do we need to provide a 3,000 hp.

Answer: Section 35 45 01 2.1 and 41 65 10.00 1.3.2 should read maximum engine horsepower. Note, the pump vendor is solely responsible for sizing the diesel engine to ensure adequate power is provided over the entire pump and reduction gear drive operating range, as indicated with the minimum and maximum flows and pressures in 35 45 01 2.1. Also note that the provided engine shall satisfy the 110% rated capacity in 41 65 10.00 1.3.2

Question 6: Can the bid date be delayed?

Answer: Yes. USACE will determine the length of the extension and issue an amendment with the new date when bids are due.

Question 7: Will the access roads constructed by others outside of this project’s limits of construction be complete prior to the start of this project?

Answer: Yes, they have been completed by others.

Question 8: Is the contractor responsible for the initial fill of the fuel tanks?

Answer: Yes, per Section 33 08 55 par 2.1.1, (3) "At the conclusion of commissioning the Contractor must restore all fuel tanks to full capacity (90 percent by nominal tank volume) upon successful completion of testing."

Question 9: Per section 2.11 of 41 65 10.00 10 – Diesel Fueled Engine Pump Drives it is calling for the engines to be 40 CFR 370.42, Tier 2. We cant meet EPA Tier 2 Non Road. However, the engine will be certified EPA STATIONARY EMERGENCY Meets USA Environmental Protection Agency (EPA) Stationary Emergency Certifications for Stationary Use only during defined in emergency conditions. Is this acceptable?

Answer: Engine should meet requirements for 40 CFR 60.4200-60.4219 Standards of Performance for Stationary Compression Ignition internal combustion engines. 40 CFR 60.4202 requires emergency use stationary combustion engines 2,237 kW (3000 hp) or less to meet Tier 2 or 3 on 40 CFR part 1039, appendix I, (with Tier 2 being applicable on engines greater than 560 KW), and requires engines 2,237 kW (3000 hp) or more with displacement less than 10 liters per cylinder to meet Tier 2 on 40 CFR part 1039, appendix I, and engines with over 10L/cylinder are to meet the marine equivalent standard for 40 CFR part

1042 Appendix I, which indicates Tier 2. There does not appear to be a compliance category for Emergency Use engines in the size/power range applicable that meets these requirements without meeting Tier 2 standards, either Non-road or Marine.

Question 10: Per section 1.8 and 3.7.2 of 41 65 10.00 10 – Diesel Fueled Engine Pump Drives it is calling for a representative from the engine manufacturer to supervise and assist in the installation and start-up of the engines.

However, it doesn’t state a specific number of days or time on site. Can provide a breakdown of how much time is required to be onsite?

Answer: Representative should be present for all listed testing and inspections listed in this section and pump testing requiring pump drive engine operation and be present during the alignment of the pump drives during installation. Contractor should coordinate these tasks and any other installation procedures for which contractor's personnel requires expertise of this representative to complete. Required duration would be dependent upon contractor’s schedule.

Question 11: According to the station drawings it shows the exhaust mounted to the exterior of the building that will require piping, supports, etc. Is this part of the diesel manufactures scope of supply or will this be supplied by the contactor?

Answer: This requirement can be satisfied by either the contractor or subcontractors.

Question 12: Per 1.3.2 of 41 65 10.00 10 – Diesel Fueled Engine Pump Drives it states the minimum engine rated power shall be 3,000 HP. However, in Section 35 45 01 Vertical Pumps, Axial-Flow and Mixed-Flow Impeller-Type is states that the max HP for the engine is 3,000 HP. These requirements contradict one another. Can you confirm which requirement we should follow?

Answer: Section 35 45 01 2.1 and 41 65 10.00 1.3.2 should read maximum engine horsepower. Note, the pump vendor is solely responsible for sizing the diesel engine to ensure adequate power is provided over the entire pump and reduction gear drive operating range, as indicated with the minimum and maximum flows and pressures in 35 45 01 2.1. Also note that the provided engine shall satisfy the 110% rated capacity in 41 65 10.00 1.3.2

Question 13: Per section 1.5.2 and 3.7.2 of 35 45 01 Vertical Pumps, Axial-Flow and Mixed-Flow Impeller-Type it is calling for a representative from manufacturer to supervise and assist in the installation and start-up of the pumps.

However, it doesn’t state a specific number of days or time on site. Can provide a breakdown of how much time is required to be onsite?

Answer: Representative should be present for all listed testing and inspections listed in this section, assembly of pump components, coupling of the pump shafts, setting of impeller clearance, and be present during the alignment of the pump to the gearboxes and pump drives during installation. Contractor should coordinate these tasks and any other installation procedures for which contractor's personnel requires expertise of this representative to complete. Required duration would be dependent upon contractor’s schedule.

Question 14: Can temporary piles and cofferdam piles be removed or do they have to be cutoff and left in place?

Answer: They must be cutoff and left in place.

Question 15: Per section 2.17 of 41 65 10.00 10 – Diesel Fueled Engine Pump Drives; Bases, 2,17 Bases, it listed that the rail base shall be completed with "steel spring vibration isolations between rail base and concrete pad". Can you verify if rubber pad isolation are a viable alternative option in lieu of spring isolators?

Answer: Rubber pad isolation is NOT considered an alternative to spring isolators.

Question 16: Per section 3.1 of 41 65 10.00 10 – Diesel Fueled Engine Pump Drives; 3.1 Examination, please confirm the length of time that will be required for the rep examination.

Answer: Contractor should coordinate these tasks and any other installation procedures for which contractor's personnel requires expertise of this representative to complete. Manufacturers' representatives must be present to support acceptance testing and commissioning activities cited in the specifications.

Required duration would be dependent upon contractor’s schedule.

Question 17: Per section 1.8 and 3.72 of 41 65 10.00 – Diesel Fueled Engine Pump Drives; 1.8 and 3.72 Field Engineer or Erecting Engineer. Please confirm the length of time that will be required for the required for the rep to be on site for these various tasks and supervisions

Answer: Contractor should coordinate these tasks and any other installation procedures for which contractor's personnel requires expertise of this representative to complete. Manufacturers' representatives must be present to support acceptance testing and commissioning activities cited in the specifications.

Required duration would be dependent upon contractor's schedule.

Question 18: Per section 2.9.2 of 41 65 10.00 – Diesel Fueled Engine Pump Drives; 2.92 Exhaust Muffler (Engine Exhaust Silencer), is there any specific dBA level that needs to be accounted for? Or is will this be supplied by the contractor and our responsibility/scope is to make sure that the unit is compatible with our engine?

Answer: The engine exhaust silencer should be included in the engine vendor's scope of supply to ensure compatibility. The silencer should provide 25-35 dBA attenuation, or better, over the operating frequency band.

Question 19: It states in the specifications “that multiple contractors will be using the access roads at both sites and each contractor is responsible for their own maintenance, dust control, flagman, street sweeping, etc. are all required to maintain the road”. How is the contractor for this project able to monitor the maintenance required by the other contractors?

Answer: Contractor shall communicate and coordinate with other Contractor to jointly maintain the access roads.

Question 20: Does the contractor have to maintain a navigable waterway during construction?

Answer: No, a navigable waterway does not need to be maintained during construction. However, drainage does need to be maintained.

Question 21: Is the intent at the RRC location to build a temporary bridge over the canal for access to the west side of the canal?

Answer: It will be allowable for the contractor to construct a temporary bridge for access to the west side of the canal so long as it follows the language within the specifications. See Amendment 1 for those requirements.

Question 22: Are construction joints on the T-Wall section views required or does the contractor have the option of removing these? (Example on drawing 2S-363)

Answer: The contractor may adjust the construction joint spacings to conform to the contractor's operations. However, concrete placement shall meet the requirements in the specifications.

Question 23: Will alternate Temporary Retaining Structures be allowed?

Answer: Yes, TRS shown are conceptual for bidding purposes only. The contractor shall design their own TRS, stamped by an engineer licensed in the State of Louisiana and submit it for approval.

Question 24: Are the Tremie Slabs strictly used for bracing the lower portion of the TRS or is it used for a structural component as well?

Answer: For the conceptual design of the TRS, the tremie slab is a structural component. The contractor shall design their own TRS, stamped by an engineer licensed in the State of Louisiana and submit it for approval.

Question 25: In section 03 31 00.00 12 it states that all base slabs and vertical wall components greater than 24” thick shall be considered mass concrete. Can you verify this thickness?

Answer: The thickness is correct

Question 26: Minimum Design Life Requirement of 30 years. Specification 32 20 18.00 12 - Paragraph 2.1.c.1 indicates that the trash screen, rake and all accessories shall meet a minimum design life requirement of 30 years.

Will three (3) references of screens with the same design that have been in operation for over 30 years be acceptable as confirmation of meeting this requirement or will other information be required?

Answer: Note Wrong spec referenced. Should be 35 20 18.00 12. References are not required. Materials must adhere to the specifications.

Question 27: Structural Calculations. Specification 32 20 18.00 12 - Paragraph 2.1.d : Do the structural calculations required in Section 2.1.d need to be completed by a licensed structural engineer? Do they need to be sealed by a licensed structural engineer and if so, in what State?

Answer: Note wrong spec referenced. Should be 35 20 18.00 13. All structural calculations shall be performed by a licensed Civil or Structural Engineer, licensed in the State of Louisiana.

Question 28: Wind Loads. Specification 32 20 18.00 12 - Paragraph 2.1.c.6: Do wind load calculations based on ASCE 7-22 SEI 7 need to be included as part of the structural calculation submittal (Section 2.1.d) to determine compliance with Section 2.1.c.6 ?

Answer: Note wrong spec referenced. Should be 35 20 18.00 14. Yes, wind loads should be calculated based on the parameters stated in paragraph 2.1.c.6 to confirm operability under stated storm conditions

Question 29: Floating Trash Barrier - Section 35-31-20.2.3.3 – The current specification calls for the floating barrier to be safety orange. Black polyethylene has a much longer lifespan than colored polyethylene, It is far more UV resistant and much more durable overall which translates into a longer life span with less maintenance or repair requirements. We would typically provide a black polyethylene base encasement and add mechanically fastened high visibility color reflectors to provide the visual identification during the day and have significantly better visibility characteristics in low light and nighttime hours. This is also more consistent with OSHA/ANSI/DOT regulations for construction or traffic control operations and will provide a better margin of safety for identification of the log barriers in the water Answer: No, floating barriers are to be safety orange as stated in the specifications.

Question 30: Will the Army Core of Engineers consider a black polyethylene base encasement with mechanically fastened high visibility color reflectors in lieu of safety orange for the log barriers”?

Answer: No, floating barriers are to be safety orange as stated in the specifications.

Question 31: I would like to submit the following questions regarding the trash screens in Section 35 20 18 00 12:

Are the trash screens to be enclosed in any way on the operating floor to prevent personnel from falling into the screening channel?

Answer: No, trash screens are not enclosed.

Question 32: I would like to submit the following questions regarding the trash screens in Section 35 20 18 00 12: 2.

What will be screenings be deposited in?a. As no conveyor system was specified, please confirm the screenings will be put into some kind of roll off container. b.If some conveyor system was specified, please state the specification section for reference.

Answer: Screenings will be deposited onto the concrete decks and hauled away via bobcat, etc.

Question 33: I would like to submit the following questions regarding the trash screens in Section 35 20 18 00 12: 3.

Are there specifications for a warranty in terms of duration and terms?

Answer: Please provide a 5-yr warranty, as minimum, from the date the equipment is accepted in accordance with the requirements of "Installation and Testing Completion".

Question 34: Due to the complexity of the project scope, the involvement of numerous trades, and the time required to ensure accurate and thorough preparation, we would like to request an extension to the bid submission deadline.

Answer: Yes. USACE will determine the length of the extension and issue an amendment with the new date when bids are due.

Question 35: Considering the rough order of magnitude and the detailed work required, we kindly request an additional four weeks, extending the deadline to May 26, 2025.

Answer: Yes. USACE will determine the length of the extension and issue an amendment with the new date when bids are due.

Question 36: Beneficial Occupancy. The Contract Documents lack clarity on beneficial occupancy, in part or whole of the Project prior to Substantial Completion. Please confirm that if the Owner takes a beneficial occupancy of the Project or any identifiable portion of the Project, such beneficial occupancy shall constitute Substantial Completion of the beneficially occupied portion of the Work and that the Owner shall negotiate with Contractor with respect to any impacts of such occupancy or clarify what is intended.

Answer: Please refer to FAR 36.511 Use and possession prior to completion.

Question 37: Damages – Consequential. The Contract Documents do not expressly exclude damages other than direct damages or liquidated damages. These other damages would be in the nature of indirect damages. Please confirm that each Party expressly waives any claim for indirect or consequential damages that could be demanded by either Party against the other or explain what is intended.

Answer: The government does not waive claims on damages. This question cannot be further answered as it calls for legal interpretation and conclusion.

Question 38: Damages – Liquidated. Please confirm that Liquidated Damages ("LDs") are the Owner's sole and exclusive remedy with respect to any late substantial completion ("SC") caused solely by Contractor, and that each Party accepts that LDs are considered to be direct damages and not to be considered indirect damages or explain what is intended.

Answer: Liquidated damages are not the Owner's sole remedy. They are also not considered to be direct.

Liquidated damages are a pre-determined sum of money, stipulated in the contract, that the Contractor will be required to pay for exceeding the contractually required completion date, rather than actual damages.

Question 39: Delays. The Contract Documents lack clarity on the handling of excess adverse weather. Please confirm that the Parties will use a standard calendar of anticipated adverse weather of expected days by month of expected adverse weather and that Contractor shall track, document and present adverse weather in excess of anticipated on a weekly basis for an adjustment of the Contract Time, with such adjustment presented on a monthly basis, or explain what is intended Answer: Refer to Paragraph 1 of section 01100.

Question 40: Delay - Recovery of Time Obligation. The Contract Documents appear to allow the Owner to direct acceleration without compensation when the cause for critical path delay is by other than the Contractor. Please confirm that the Parties shall negotiate the compensable impacts of any directed or constructive acceleration of the Work except where such acceleration or recovery of delay to the Project critical path due solely to Contractor critical path delay and without corresponding critical path delay by the Owner or others or explain what is intended.

Answer: Critical path delays area post award administrative issue that cannot be pre-determined in the solicitation phase. This question cannot be expressively answered as it calls for legal interpretation and conclusion.

Question 41: Hazardous Materials. Please confirm that Owner shall indemnify, defend, and hold Contractor, its agents, officers, parent company, subsidiaries, harmless from and against all claims, damages, fines, fees, remediation, damages, and costs including, without limitation, reasonable attorneys' fees and costs, arising out of or resulting from pre-existing or undisclosed hazardous materials or conditions, except to the extent of Contractor's fault or negligence, or explain what is intended.

Answer: USACE is unable to confirm or deny the Owner will indemnify and defend Contractor. This question cannot be further answered as it calls for legal interpretation and conclusion

Question 42: Utilities (Pipelines)- Undisclosed / Responsibility / Coordination. Please confirm that any outstanding requests for information which are submitted timely, shall be resolved during negotiations after award.

Answer: USACE is unable confirm or deny that all timely requests will be resolved during negotiations after award.

Question 43: Please confirm all known utilities and pipelines have been identified and disclosed to Contractor and any discrepancies identified and disclosed to Contractor.

Answer: USACE has made its best effort to identify and disclose all known utilities and pipelines.

Question 44: Section 35 45 01, Paragraphs 1.7.2.d and 2.1.1.d Please supply the system head curve for both pump stations.

Answer: The system curve will be provided in Specification 35 45 01. Design operating points are specified in 2.1. See Amendment

Question 45: Section 35 45 01, Paragraph 2.1. Please confirm the maximum engine RPM allowed. The specified engine horsepower of 3000 HP is high for the pump conditions of service.

Answer: The pump vendor is solely responsible for sizing the diesel engine to ensure adequate power is provided over the entire pump and reduction gear drive operating range, as indicated with the minimum and maximum flows and pressures in 35 45 01 2.1. Also note that the provided engine shall satisfy the 110% rated capacity in 41 65 10.00 1.3.2. Max engine RPM is 1800 per 41 65 10.00 1.3.2.

Question 46: Section 35 45 01, paragraph 2.1.3.1 Does the engine horsepower only have to cover to the priming condition of 26.1’.

Answer: No. The pump vendor is solely responsible for sizing the diesel engine to ensure adequate power is provided over the entire pump and reduction gear drive operating range, as indicated with the minimum and maximum flows and pressures in 35 45 01 2.1. The maximum horsepower condition is the priming head.

Also note that the provided engine shall satisfy the 110% rated capacity in 41 65 10.00 1.3.2.

Question 47: Section 52.225-11. Please confirm that on WSLP 114 the Free Trade Agreement applies to construction contracts equal to or more than $7,008,000 for WTO GPA countries and to contracts equal to or more than $10,802,000 for NAFTA countries.

Answer: USACE is unable to confirm or deny that the Free Trade Agreement applies. Please refer to the FAR for guidance.

Question 48: 0001 FAR 52.225-11 incorporates Buy American- Construction Materials Under Trade Agreement (Nov 2023) this project. Please advise how this project will be evaluated: will it be evaluated looking at the pump, engine, and right-angle gear being one complete unit, or will each item be evaluated separately (pump/engine/right-angle gear)?

Answer: USACE is unable to respond as it calls for legal interpretation and conclusion. Please refer to the FAR for guidance.

Question 49: 00800 Wage Determinations- please confirm Davis-Bacon Wages are not applicable to manufacturer/suppliers not performing work on site.

Answer: confirmed Question 50: Section 35 45 01 1.5.4 advises that all welded structural members are to be welded in accordance with Section 05 50 03.00 12. Can we get clarification as to what the intent is regarding the pump itself and what components are included as welded structural members.

Answer: Welding of structural members is applicable to non-pressure containing components, such as the right angle gear stand.

Question 51: Section 35 45 01 2.1.1 d advises to look at the system description and see that we need to refer to the system curve and, unless we are overlooking, cannot locate the system curve. Can the system curve be provided for review?

Answer: The system curve will be provided in Specification 35 45 01. Design operating points are specified in 2.1. See Amendment

Question 52: Section 35 45 01 2.4.3 uses the phrase "pool-to-pool efficiency" and should be replaced with "pump-efficiency" due to the equation that is provided being for pump efficiency using the pump total head. Please confirm this change will be made.

Answer: Supplier may use alternate terminology to describe efficiency, as long as the indicated equation is used to calculate the efficiency. Specifications will not be revised.

Question 53: Section 35 45 01 2.4.6.1 advises that the plain end opening tolerance of the discharge elbow is 0.010 inch. Please advise if this is referring to the tolerance allowed on the inside dimension of the square opening or if the intent is related to flatness of flange or position of opening.

Answer: The reference is to the tolerance allowed on the inside dimensions of the square opening.

Question 54: Section 35 45 01 2.4.10.1 advises the pump manufacturer to route the RTD's through the annular space of the column pipe. We would recommend routing the detector heads on the outside of the column pipe (with protection of the probe through the hydraulic passage) for easy removal and replacement if needed. Please confirm this is allowable.

Answer: Specific routing of the bearing RTDs is allowed to vary based on specific vendor experience.

Question 55: Section 35 45 01 2.4.8.3 advises the pump manufacturer has the option to use replaceable shaft sleeves.

Supplying shaft sleeves will prevent complete replacement of the entire shaft if damage occurs and shaft sleeves are not used. Utilizing shaft sleeves also provides easier installation of the seals. please confirm which option (with or without separate shaft sleeves) is preferred by the end user and we request the specification be adjusted to reflect same.

Answer: The end user does not have a preference. The vendor may provide either method based on their specific experience.

Question 56: Section 34 45 01 2.4.9 advises to use threaded cover pipe. Due to the material of construction 316 SS and the overall size of the cover pipe a threaded connection is not recommended. Flanged cover pipe will be less likely to be damaged during installation and disassembly. Is the use of flanged cover pipe with other tensioning methods allowable.

Answer: Yes, use of a flanged cover pipe with other tensioning methods are allowed.

Question 57: Section 35 45 01 2.6 advises no painting is required for stainless-steel surfaces. Please confirm this is accurate for all stainless-steel surfaces of the pump.

Answer: Yes, this is accurate. No painting is required for stainless steel surfaces.

Question 58: It appears from the plan drawings (reference 0S-501 and others) that the roof angle of the FSI in the concrete section deviates from the roof angle of the standard Corps of Engineers Type 10 FSI. Please confirm that this depiction in the drawings is intentional and that this angle is allowed to deviate from the standard FSI design.

Answer: Yes, this roof angle is intentional and the angle is allowed to deviate from standard FSI design based on physical modeling. The FSI is Type 10 FSI with the exception of the 3.30d dimension that has been elongated as shown.

Question 59: Section 35 45 01. 1.Where is the NPSHA being referenced at in the attached pump station drawing?

We are assuming at the LWL EL – 1.5’ .

Answer: Yes, the NPSHA is relative to the minimum operating water surface elevation (LWL) as indicated in the drawings.

Question 60: Section 35 45 01. 2.Does the NPSH margin per HI 9.6.1 need to be met at all 3 conditions stated in the spec, specifically at the third operating point (800 CFS)?

Answer: Yes, pump NPSH margin per HI 9.6.1 needs to be met at all 3 conditions stated in the specification.

Question 61: Section 35 45 01. 3.Are the pump station designs (dimensions/elevations) the same for both the I-55 station and Reserve Relief Canal station?

Answer: Contractor should follow the dimensions and elevations as shown on the plans.

Question 62: Section 35 45 01. 4.Is the minimum shutoff head required per the spec a strict requirement, or can it deviate based on each manufacturer’s pump design? The pumps rarely operate any further back then the Priming Condition.

Answer: Pumps will be allowed to deviate from the minimum shutoff head requirement as the pump will not operate in this condition. The pump must, however meet the head requirements throughout the entire operating range, as indicated with the minimum and maximum flows and pressures in 35 45 01 2.1.

Question 63: Drawings 3S-584, 585 and 586 show the plans and the pile tables for the proposed T-wall monolith pipe piles beneath the I55 bridges. These pile are 127 to 142 feet long. Detail C7 on drawing 3S-390 and 390A show cross sections of the pile and bridge spans. The clearance between the bottom of the bridge girders and the top of ground at the tremie slab level is about 30 feet. These pile are to be installed in 5 foot long sections. Note 3 on drawing 0S-152 states, “No splices shall be allowed in the upper or lower third of the pile. …”. Will contractor be allowed to disregard this note and splice the pile per plan, or will USACE specify some other means of installing these pile to comply with the splicing note?

Answer: The pile splicing requirement “No splices shall be allowed in the upper or lower third of the pile.

…” will apply to ALL project piles unless noted otherwise. The callout on 3S-390 and 3S-390A, "(SPLICED IN MIN. 5' SECTIONS UNDER BRIDGE) shall apply only to the 24" pipe piles under the I- 55 bridges on 3S-584 and 3S-586.

Question 64: Regarding the proposed pipe pile for the T-Wall monoliths beneath the I55 bridges, will USACE allow contractor to install these pile to the designed tip elevation with vibratory drivers exclusively?

Answer: No. Vibratory hammers will not be allowed.

Question 65: Regarding the proposed pipe pile for the T-Wall monoliths beneath the I55 bridges, will USACE allow contractor to install these pile to the designed tip elevation by jetting?

Answer: No. Jetting of the piles will not be allowed.

Question 66: Drawings 3C-390 and 390A have a suggested construction sequence: Drive Sheet Pile Cutoff wall, Drive 24” Pipe Piles, Construct TRS and Excavate. This sequence is onerous because there is currently 9 to 10 feet of water beneath the bridges and bridge to water clearance appears to be about 16 feet. There is not enough clearance beneath the bridges to allow for pile driving equipment, even at 5 foot pile lengths. Will USACE allow an alternate TRS system to be installed first in an effort to allow for excavation to provide clearance for the pile drive operations?

Answer: Note incorrect drawing referenced. Should be 3S-390.The TRS shown is conceptual and for bidding purposes only. The contractor shall submit their own TRS design, designed by an engineer licensed in the State of Louisiana for review and approval along with the contractor's construction sequence.

Question 67: Drawing 0A-152 shows a pipe pile and concrete fill of 10 feet. Note 2 on this drawing calls for the top 10 feet to be filled with 2500 psi concrete. There are several other drawings in volume 3 that depict pipe piles with concrete fill but with fill heights that are less than 10 feet, and do not specify the concrete strength being different than the structure it is embedded into. Please clarify, for each structure that gets pipe pile embedded in concrete: the depth of concrete fill, and the strength of concrete for that fill.

Answer: Note incorrect drawing referenced. Should be 0S-152.Drawing 3S-507 and 2S-507 will be amended for clarity.

Question 68: Drawings 3S-130, 315 shows the I55 braced wall composed of the 66” PCC cylinder piles. These piles are to be concrete filled, but no elevations are given to quantify that fill. Please provide top and bottom of concrete fill elevations Answers: See sheet 3S-515 Section A11 for concrete infill elevations.

Question 69: Local note on section E13 on Drawing 3S-130 states, “Grout Bag Down to Top of Jet Grout Column”.

Please provide more information and details on what this note means so contractor can quantify the material needed to construct this

Answer: The grout bag shown on 3S-130 goes from the top of the 66" spun cast piles to the top of the jet grout column at EL. -15 as shown on Sheet 3S-315.

Question 70: Detail A2 and B2 on Drawings 3S-515 and 516 show the connections to the adjacent T-Wall and the Drainage Structure. These details are very congested and confusing as to the elevations of the different components.

Could an elevation or elevation section be provided to better define top and bottom elevations for the many parts of these connections?

Answer: Sheet 3S-515 and 516 have been edited for clarity. See revised drawings in Amendment.

Question 71: Note 1 on Detail A2 and B2 on Drawings 3S-515 and 516 states, “All Steel Above EL -20 Shall be Stainless Steel. What grade of Stainless Steel is to be used?

Answer: SS to be grade 316.

Question 72: Note 1 on Detail A2 and B2 on Drawings 3S-515 and 516 states, “All Steel Above EL -20 Shall be Stainless Steel. At the interface of carbon steel and stainless steel, what is to be done to isolate these differential metals?

Answer: Sheet 3S-515 and 516 have been edited for clarity. See revised drawings in Amendment.

Question 73: Will USACE allow for alternate piling design for the T-wall monoliths under I-55 in lieu of the battered pile.

Answer: No, alternate piling designs will not be allowed.

Question 74: Per Section 00700 Para 52.236-4 Physical Data, Sub Para (c) the access roads are to be maintained as described below. Since these roads are jointly being utilized by other contractor’s how are we to assess at this time what the scope of this work entails. Can you provide some additional information on the expected other traffic and duration that the roads will be shared but maintained by this contract?

Answer: Adjacent Contractors will be using the access roads for construction and hauling related activities.

Contractor shall communicate and coordinate with other Contractor to jointly maintain the access roads.

Question 75: Are the navigable waterways refereed to per para 252.236-7002, see below clearly defined by the contract documents?

Answer: The contractor shall comply with the FAR clause 252.236-7002 in its entirety. The contractor is not to dump or leave anything in the waterway.

Question 76: Besides the Bypass Canal at the Reserve Station, are there any restrictions on closing of the canal particularly at the I-55 pump station? With construction of the pump station TRS and others, is there an amount of the canal that must remain open?

Answer: 82' width of channel must remain open between the East Twall and Drainage Structure until flow is routed into the constructed drainage structure.

Question 77: Can the USACE confirm that the requirement to provide the two(2) UTV vehicles per Section 0100 ,Para 32 is required since the sites are basically on a single footprint and the access to components are basically by water?

Answer: One UTV is required per site, two UTVs total. The sites are greater than 10 miles apart, by roadway, A UTV would not be able to drive from site to site

Question 78: Sect 01 32 01.00 12 – Project Schedule includes among other things a paragraph that addresses that states that “No extended overhead will be paid for the delay prior to the original Contract Completion Date for Early Completion….”, see below. So, is this stating that the contractor will not be granted extended overhead costs for delays for any period prior to the 1517 Calendar Days allowed under the contract? Please clarify or confirm?

Answer: Confirm - FOOH is only awarded for impacts to critical path.

Question 79: Sect 01 33 00 Submittal includes a paragraph relative to the review time states that a minimum of 30 Calendar days is required for review and approval, see below. Can you confirm that all submittals will require (at a minimum) 30 calendar days for review and approval? Since the contract requires the use of the RMS System ( Section 01 45 00.15 10), we assume this process will be done electronically and the review time will start when the document is downloaded into the RMS system, correct?

Answer: Contractor should schedule a minimum of 30 day for the Government to review and respond to a submittal. It some cases, it may take less time. The start of the 30 days time period begins with Government Acceptance of the submittal in RMS. The Government will accept submittals during normal working hours. For example, if a submittal is put into RMS by the contractor at 6:30 pm on the Friday before Memorial Day, it will not be accepted by the Government until the following Tuesday.

Question 80: Sect 01 45 04.00 10 Contractor Quality Control, Para 3.4.2 CQC System Manager identifies the qualifications and duties of the CQC Manager and mentions that a separate CQC System Manager shall be assigned to the each of the two pump station sites, see below. Can you please further clarify as there should be one single CQC manager and assistant/alternate at the other site (not another manager licensed professional Engineer with 3 years of experience) And also, confirm the total required overall and at each site? If there is only one “QC Systems Manager” and assistants, will the assistants be able to have other duties?

Answer: One CQC System Manager is acceptable for the overall management of the CQC program and may also function as a QC for one of the sites. An assistant/alternate can be used at the other site. The assistant/alternate can perform other duties provided they are not the primary QC for any site

Question 81: Due to the extensive nature of the CQC Plan on this project covering a vast number of activities, would it be possible to provide a preliminary CQC Plan covering the initial aspects of the project (temporary facilities, temporary roads, access plans, clearing and grubbing, sand fill and wick drain work, etc.) while we develop the plans for the major structural, architectural, mechanical, electrical and controls portion of the plan to insure we are not held up on at the outset on that portion of the works. We would be working on the complete plan from the outset but this would allow more time to provide a thorough overall plan. Please consider.

Answer: This is acceptable. The initial CQC plan shall contain initial aspects of the project. The remainder shall be submitted no later than 30 days prior to the start of construction activities.

Question 82: Sect 01 53 00.02 12 Temporary Retaining Structures, Para 3.4.1 states there will be no removal of the temporary retaining structures, see below. Can you confirm this is the intent? Also, can you confirm in each case what is considered the “mudline”. Also, if that is the case are the cutoff sheet piling at the pump station, drainage structures and the t-wall redundant if the structures are totally encircled by the temporary sheet piling walls? Also, a cursory review of the foundation drawings indicates a few conflicts between the piling & TRS sheeting ( See Dwgs.

2S-150, 2S-151 & 2S-152)

Answer: Yes, the TRS may be cut off at the mudline but cannot be pulled. The mudline, as referred here, is any elevation at or below the final grades and/or elevations for the project. The cut off wall is not redundant. The TRS sheet pile does not necessarily reach the depth required to prevent seepage under the structures under design hydraulic conditions. There are no pile conflicts between the TRS sheet pile and structure foundation piles. See sheets 2S-330 through 2S-336 for section views showing piles and sheets.

Note, the TRS shown on the plans is conceptual and for bidding purposes only. Contractor shall submit design of their own TRS stamped by a registered engineer, licensed in the State of Louisiana.

Question 83: Section 03 31 00.00 12 Cast-in-Place Structural Concrete, Para 1.7.6 Crystalline Waterproofing Admixture describes the limits of the Crystalline material limits at the pump station. Upon review of this language and what is detailed per Dwg. OS-530 it appears this language is relative to the foundation slab Elev. -18.0’ only and as a point of clarity needs to be expanded to include the limits detailed per the applicable contract drawings.

Answer: Specification section has been edited to be coordinated with the plans. See Amendment.

Question 84: Section 05 12 00 Structural Steel references construction of various components ( i.e. Draw Bridge & T-Wall Access Walkway and refers to the crane rail structural components) in the description. Para 2.9.1 Shop Primer. Can you please clarify exactly what primer is being referenced therein and can you confirm this aligns with the applicable painting specifications , which are further reference in Para 2.9.2 Epoxy Coated Surfaces. It would be extremely helpful to clarify what coating specifications are to be applied with an overall painting schedule, referencing the various items to be painted and the specific coatings specification that would apply and the specific system to follow.

Answer: Painting schedules are included in Sections 09 97 02.01 12 and 09 97 02.02 12 for the items explicitly called out there. The Draw bridge, T-wall Access Walkway and crane rail are to be galvanized.

Question 85: Section 07 12 00 Built-Up Bituminous Waterproofing, Para 3.3.6.1 Below Grade Waterproofing references a 4-ply hot-applied membrane system that is reference to be installed at the per a note on Dwg S-001 a from the pump station foundation Elev-18.00 to 4” below Elev. 6.00. Would the engineer consider utilizing a liquid, cold-applied elastomeric waterproofing membrane system similar to BASF HLM 5000® is a one-component, moisture-curing, bitumen-modified polyurethane elastomeric waterproofing membrane for exterior below-grade or between-slab applications. It is available in 4 grades for application by trowel, squeegee, roller and spray. This product if safer for the installers since it is a cold applied application to install and should yield the same final result as that which is specified. See below typical installation detail.

Answer: BASF HLM 5000 is not allowed for submerged or exposed conditions. Sikagard -7600 VG was recommended by the manufacturer. All manufacturer’s instructions should be followed including surface prep, crack treatment, priming and coat thickness. 60 mils is required. See Specification Section 07 14 00.

Question 86: Section 08 91 00 Metal Wall Louvers specification covers both metal and aluminum materials that the louvers are to be made of. Can you specifically confirm what louvers are made of what specific materials and can you confirm if the finish is anodized or painted.

Answer: Use specification 23 00 00 para. 2.4.1 for louver material and finish. Louver material shall be extruded aluminum. Louvers shall be factory painted. Section 08 91 00 will be deleted by amendment.

Question 87: Section 09 90 00 Paints and Coatings, Para 3.11.1 Exterior Paint Tables references various surfaces to be coated including galvanized and surfaces, which are not to be painted via various specifications and notes throughout the contract drawings. Can you clarify and/or confirm what is to be specifically coated per this specification section? A detailed coatings table on all surfaces would clear this issue up.

Answer: Section 09 90 00 specifies general painting/coating requirements on surfaces applicable more to buildings. Contractor to coordinate with vendor to submit proposed painting/coating for specific application per its related Design Drawing or Specification.

Question 88: Section 09 96 00 High Performance Coatings, Includes Heat-Resistance Coatings, Epoxy Coatings, Polyurethane Coatings and Chlorinated-Rubber Coatings. Para 2.2 notes “Apply the following coatings as indicated in Design Documents” but there are no clear notes on the design documents that define where these coatings are to be applied. This specification is confusing as to exactly what coatings are to be applied on what surfaces. Can you clarify and/or confirm what is to be specifically coated per this specification section? A detailed coatings table on all surfaces would clear this issue up. Section 09 97 02.01 12 Coal Tar Epoxy Systems also includes specifications on Epoxy Coatings. This specification includes as Para 3.5 Painting Schedule (See below). Can you confirm that this is the only surfaces that receive epoxy coal tar coatings?

Answer: Section 09 96 00 specifies general painting/coating requirements on surfaces applicable more to equipment and structures. Contractor to coordinate with vendor to submit proposed painting/coating for specific application per its related Design Drawing or Specification. Coal tar epoxy is applicable to items listed in Section 09 97 02.01 12 3.5 painting schedules and other places indicated in Design Drawings and Specifications. Spec will be clarified by amendment.

Question 89: Section 13 34 19 Metal Building please specify any specific primary or secondary structural component coatings if any are desired in addition to that which is specifically included is the metal building specification.

Answer: Please see paragraph 2.3.1 of specification section 13 34 19 Question 90: Dwg. OS-002 TRS Design Criteria, Soil Loads, Lateral refer to “Soil Lateral Earth Pressure Shall be based upon the preliminary strength design lines by Ardaman and Associates, Inc.” Can engineer supply the entire soils report along with the pressure diagram referenced, see below?

Answer: The 'strength design lines' used for design of the completed project features is provided directly after Specification Section 01 53 00.02 12. Note, the strength design lines and soil profiles shown are provided for general information only. The design profile provided were developed for the final, constructed features and do not consider the various construction stages, conditions, and loads that are dependent on the Contractor’s means, methods, and sequencing. The soil profiles included in the specifications are subjective and are partially based on engineering judgement, experience of the design engineers, and design of the completed project features. The Contractor shall make an independent interpretation of subsoil conditions at the site and perform their own engineering calculations and design considering how they may impact the various stages of construction, construction loading conditions, and their means and methods. The geotechnical engineering report is not part of the construction contract project documents and will not be provided. Drawing/specs will be clarified as part of amendment.

Question 91: Dwg.