Sol_140P2023R0132_Amd_0004.pdf

(x)

140P2023R0132 x x

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 electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT 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 letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

x

PDS

Denver CO 80225-0287 P.O. Box 25287 12795 W. Alameda Pkwy NPS, DSC Contracting Services Div

08/04/20230004

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

Offers 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

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code)

7. ADMINISTERED BY (If other than Item 6)CODE 6. ISSUED BY

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

07/03/2023

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

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

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

ORDER NO. IN ITEM 10A.

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

CAHA 213068 / Repair Cape Hatteras Lighthouse, CAHA 319350 Restore or Reconstruct Historic

First Order Fresnel Lens, and CAHA 319351 Improve or Restore Historic Landscape

The purpose of this amendment 0004 is to incorporate the following:

1. Post Questions and Answers

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)15A. NAME AND TITLE OF SIGNER (Type or print)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

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

Bai Perney

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

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

CAHA 213068 / Repair Cape Hatteras Lighthouse, CAHA 319350 Restore or Reconstruct Historic First Order Fresnel Lens, and CAHA 319351 Improve or Restore Historic Landscape

Questions and Answers August 4, 2023

Question Number

Question Answer/Response

S001 (Structural Steel 9.) No Fabrication of steel shall commence with out approved shop drawings.

Does this include reproduction of existing items?

Does include repairs to existing items?

Confirmed. Shop drawings shall be provided for reproduction of existing items and repairs of existing elements.

A120 / S100 / S120 IN-SITU Testing measure with laser or alternate approved NDT for section loss, cracking, pitting all surfaces. Results shall be reported to contracting officer for repair approach Are all areas of inspection going to be demolition before inspections begin or will it be done on a level by level basis?

It is acceptable to Silman to test by level as work progresses, especially if this approach minimizes the time that existing elements are exposed without paint or left untreated. Contractor to confirm scheduling of this approach considering lead times for fabrication for replacement and repair components. Contracting officer to confirm that level-by-level NDE measuring is acceptable from a review and schedule perspective.

A103 Replace Nuts and bolts on staircase tread 50% replacement assumption. What is the thread diameter? Thread Pitch? Nut style?

Existing nuts are approximately 3/4-inch hex nuts, approximately 1 inch deep. Existing thread pitch is unknown. Replacement nuts must exactly match the dimensions and profile of existing nuts to remain and must match the thread of the existing iron spindle rods.

A103 / S121 For Beam repair Assume (4) 12" and

(4) 9" beams will require reinforcing with A36 steel plates at flanges and web? What is the assumption of length of each repair?

Actual beam lengths and final design of repair detail shall be confirmed following close observation from scaffold. For bidding purposes, please assume full length repairs at the (4) 12" beams and (4) 9" beams to be repaired, per S121.

A103 / S121 Replace corroded Connecting Plates with 20% section loss. Assume 25% replacement.

Of what quantity?

Assume 25% of all stair-landing beam connections throughout the lighthouse. For pricing purposes for each connection, assume that the full connection plate shall be replaced.

2. 076100-2.5.A.2- please clarify location and function of this item- they don’t appear to be referenced on the drawings

Disregard section 076100-2.5.A.2. Copper roof should be attached to roof deck, as detailed.

A103 / S121 Replace bolts with 3/4 blind bolts.

Assumption Qty?

See response to 37. Match bolt configuration in the field (for pricing purposes use bolt configuration shown on drawings). Assume all bolts will be replaced at connections to be repaired. See 37 for total quantity of connections.

S134 Suggested method of crack repair Lock and stitch. Need an assumption value in linear inches.

Refer also to question 48. Details listed on S134 are reference repair details. Quantities for pricing are noted on plan and detail sheets.

S100 / S122 Assume 2 of 5 lintels will require replacement in SS matching cast iron profiles T7 & T8 to be replaced. What does the existing look like? Size? Weight? Are Lintels at T2, T4, T5 to be replaced or inspected for evaluation?

Assume that the 2 of 5 lintels at windows T2 through T6 shall be replaced with a new stainless steel element matching the dimensions shown in 4/S122. Detail 4/S123 pertains only to lintels to be replaced at windows T7 and T8.

44 D102 / A102 / A142/S128 Remove and replace iron wall panels. Are these to be Stainless steel? Or

Intent is to replace with cast iron fabricated in panels to match existing configuration. Diameter of the service

Cast Iron? Wrought Iron is not an option. What is the diameter of the service room? Height? How are the new panels going to be put into the room without having the floors above removed?

room is approximately 11'-6" and height is approximately 9'-6". Design intent is to assemble panels and stair components in place, to be confirmed through contractor's means and methods.

S126 New Bronze final under baluster. Is this the baluster nut? What does the existing look like?

Size? Weight? Thickness? Profile?

Refer to Drawing A122 details 6, 7 and 8.

S127 Inspect tension ring condition at Service Room? What level of section requires replacement / repair

Existing tension ring is located below watch level but is concealed by the existing deck plates. Intent is to verify condition of the tension ring when the materials is exposed following removal of the deck plates.

A102 / A123 / S130 Repair Crack in Outer Plate of Watch Tower. Assume 72" lock and stitch. Are outside watch room wall panels being inspected for section loss?

Confirmed, exterior panels should be reviewed for section loss and contractor should notify contracting officer of unforeseen conditions.

S130 Inspect tension ring condition at Watch Room? What level of section requires replacement / repair?

Existing tension ring is located below watch level but is concealed by the existing deck plates. Intent is to verify condition of the tension ring when the materials is exposed following removal of the deck plates.

S130 Lantern room Deck plates, assume replace one. What does the existing look like? Size?

Weight? Thickness? Profile?

Configuration and profile of lantern-level deck plates are shown on Drawings S131 and S132. Exactly match existing profiles, dimensions and thicknesses.

S126 Watch room Deck plates, assume replace two. What does the existing look like? Size?

Weight? Thickness? Profile?

Watch Room level deck plates are shown on Drawing S129. Exactly match existing profiles, dimensions and thicknesses.

S124/ S126 / A102 Deck plate brackets remove one at a time for inspection and repair. Assume 2 need replacing. What does the existing look like?

Size? Weight? Thickness? Profile?

Refer to Drawings A102, A121, S126 and S127.

Exactly match existing profiles, dimensions, and thicknesses.

05 03 12-11, 2.2 B 1 Provision of wrought iron "The Real Wrought Iron Company (Yorkshire England). They do not produce Wrought Iron nor does anyone else it is not available, what substitutions would the park allow?

Alternate materials shall be reviewed on a case by case basis, depending on location and function of original component requiring repair or replacement. For pricing purposes, Silman recommends replacement with ductile iron where wrought iron cannot be sourced.

09 96 00-4, 2.3 A 1 Owner will engage services of testing agency to sample coatings on site. Pull tests are not NDT and will require touch up. Can these tests be done at shop by 3rd party before going to job site? What are the tests being performed and the parameters of each test?

Procedure described in Part 2 refers to Owner/Contracting Officer's reserved right to perform independent testing. Field quality control testing is specified in Article 3.4. It is the Contractor's responsibility to engage the testing agency.

08 51 16-4. 2.3 A-G: Can you please define window performance requirements as they relate to Structural Testing for wind load, water leakage, thermal movement, Wind borne-Debris-Impact Resistance

Wind load is described on sheet S002

Could NPS please clarify the CLINs and Bid Options? The drawings and solicitations are conflicting. Which document overrides?

For example, in the drawings the scope of the Oil House is called out as CLIN 1, but in the solicitation it's called out under CLIN 4. This is

Specifications and drawing documents have been corrected and were issued with Amendment 0003.

just one example.

015000 Should the price to tear down scaffolding in the event of severe weather be included in the base bid?

Engineering of scaffolding and weather-related performance is the responsibility of the Contractor.

80 101428 Will the graphic design for the wayside signage be provided by the NPS?

Yes.

81 101428 Can aluminum bases be used for the wayside signage in lieu of galvanized steel?

No. Aluminum may not be compatible with concrete used in bases and foundations.

Section 044500 – please specify type/quarry of granite for the fence curbs and flush granite bands?

Use salvaged original granite fence sills units stored in Park storage area to reconstruct historic fence sill.

Provide new granite only if required due to missing units or if units are damaged beyond acceptable repair.

Provide new granite complying with the performance requirements indicated in specification, matching the appearance, coloration and other visual characteristics of the existing original stone units, as determined by approval of samples.

Copper cannot be prepatinated copper if it will be soldered during installation. Copper can be patinated to dark brown after installation and soldering. Please advise.

Prepatinated copper is not required for the project.

Provide zinc coated copper sheet or mill finish copper sheet where indicated.

Section 076100 specifies brazing the clips to the panels. Has this been witnessed or done elsewhere?

There is doubt this is possible as described in the detail section.

Mechanically attach clips to roof deck, form into seams in roofing sheets and solder. Direct attachment via brazing or welding to rafters is not required.

Note on sheet A110 refers to repairing non-structural cracks in the stone base. How many locations and LF should be estimated/included in the base scope?

Currently show 10 crack monitor locations, for estimation purposes assume a 50 linear feet.

Please confirm that any foundations required for the exterior scaffolding may be left in place for future use upon completion of this project.

All scaffolding foundations shall be removed and the site repaired and restored per specifications.

Historic Structure Report: Appendix I: 2015 HABS Documentation indicates that digital scans of the lighthouse & surrounding site were provided on an enclosed CD & not printed. Please provide any additional documents that were intended to be provided with the original RFP documents or confirm these documents do not apply to this RFP.

The digital scans of the lighthouse do not provide additional information about the scope and extent of the work. They may be provided to the successful bidder after award.

Historic Structure Report: Appendix G: 2015 Vertical Access Monitoring Recommendation -only provides name & date for site visit report, but does not include any additional report information other than name & date of report. Please provide any additional documents that were intended to be provided with the original RFP documents or confirm these documents do not apply to this RFP.

The drawings and specifications define the scope and extent of repairs for the project. This report may be provided to the successful bidder after award.

Historic Structure Report: Appendix F: 1869 Specifications & Drawings - Contains no AS-Build drawings or specifications. Please provide any additional documents that were intended to be provided with the original RFP documents or confirm these documents do not apply to this RFP.

The drawings and specification define the scope and extent of repairs for the project. As-builts may be provided to the successful bidder after award.

Historic Structure Report: Appendix D: Archival Drawings lists archival drawings files that are located on an enclosed CD. Please provide any additional documents that were intended to be provided with the original RFP documents or confirm these documents do not apply to this RFP.

Selected historical drawings have been provided for reference and information to supplement structural element design. Additional historical drawings may be provided to the successful bidder after award.

For bidding purposes, please confirm that contractors should only price repointing 20% of the exterior of the entire lighthouse and that any additional repointing required would be treated as a change condition

Confirmed. Estimated quantity does not include areas where brick rebuilding, resetting or replacement is required.

To ensure all bidders are pricing the same scope, please provide an assumed bid quantity for the "Replace spalled or missing masonry, this area" notes on A110, A111 elevations.

For estimation purposes, assume 200 sf, not inclusive of locations where brick rebuilding, resetting or replacement is required to install other work.

To ensure all bidders are pricing the same scope, please provide an assumed bid quantity for repointing the Oil House masonry identified on A201.

Assume 15% of masonry needs to be repointed.

Please provide dimensions for copper roof panels The diameter of the roof is approximately 14'. Roof pitch is approximately 4:12. The roof is made up of 16 panels. Actual dimensions to be verified in field.

Please confirm that we are to assume all existing paint on the lighthouse (interior and exterior) is lead containing paint, and that full removal is not required unless need to make a repair.

All paint in the Lighthouse (interior and exterior) is assumed to be lead-containing. Interior masonry paint was lead-containing and has been removed to the greatest extent possible, so no stripping of interior masonry paint is required. All other paint (interior and exterior) on all surface types (masonry, metal, wood, etc.) is to be removed prior to repainting.

Please confirm that we are to assume all existing paint on the oil house (interior and exterior) is lead containing paint, and that full removal is not required unless need to make a repair.

All paint in the Oil House (interior and exterior) is assumed to be lead-containing and must be removed prior to repainting.

Please confirm that lead paint removal under this contract is limited to the interior of the Oil House per detail 1/sheet A200

All paint, interior and exterior, at the Lighthouse and Oil House is within the scope of work. All paint is assumed to be lead-containing.

Drawings-Page 10 of 130-Staging and Construction Access-Note-12'W x 6'HT chain link fence gate at site access point. The contractor shall be responsible for site access and security during construction. Will the contractor be required to have manned security from dusk to dawn?

See Response to RFI #84 issued with Amendment 003.