33330225RF0010020 Amendment 0006.pdf

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

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

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

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 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.

12. ACCOUNTING AND APPROPRIATION DATA (If required)

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

CHECK ONE 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 data, 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.)

A. The Solicitation Number cited above, to replace the FLWO Dormitory at the Fred Lawrence Whipple Observatory of the Smithsonian Institution's Smithsonian Astrophysical, is hereby amended as follows:

A.1. Attached hereto and made part of this Amendment Six are the SI Responses to RFI's dated 6/12/2025 (Questions 1 to 143).

A.2. Offerors shall acknowledge receipt of all amendments to this solicitation signed and dated and submit with proposal.

B. THE BID DUE DATE IS MONDAY, JUNE 23, 2025, AT 5:00PM EASTERN STANDARD TIME (EST).

Continued ...

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 .

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

Christine Grant

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

16C. DATE SIGNED

Previous edition unusable STANDARD FORM 30 (REV. 11/2016) Prescribed by GSA FAR (48 CFR) 53.243

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

(x)

ITEM NO. SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

NAME OF OFFEROR OR CONTRACTOR

2 34

CONTINUATION SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGE OF

(A) (B) (C) (D) (E) (F)

33330225RF0010020/0006

Except as provided herein, all other provisions, terms and conditions of the Solicitation remain unchanged.

END OF AMENDMENT SIX

NSN 7540-01-152-8067 OPTIONAL FORM 336 (4-86)

Sponsored by GSA

FAR (48 CFR) 53.110

Sol. No. 33330225RF0010020 1583808 Summit Dorm Replacement RFI Responses 1-143 Revised Date 6/12/2025

No RFI Attachments Subject 24 SK1.pdf 95 ES-WD-FS-750.pdf 95 SureSeal-SpecSheets-PDS.pdf

131-34 Spec 087100 Updated 2025.06.03

No. RFI Response By Answer 1 Is the Asbestos Survey from Versar in 1993 available to upload? My abatement contractor is requesting this information.

SI - Tartaro Yes, see attached and below Description of Versar Volumes 1-3 Versar Volume 1 includes the Summary and Results Review Sections for relevant project information •1.0, 3.0, 4.0, 5.0 •DescripƟon of FLWO FaciliƟes 2.10, 2.11, 2.12 •FLWO Building Specific InspecƟon Reports 6.10, 6.11, 6.12

Versar Volume 2 includes Appendix A – Chain of Custody Records, Laboratory Results, and Quality Control Results

Versar Volume 3 includes Appendix B – Inspector and Laboratory Analyst Certifications Appendix C- Description of Hazard Ratings, Hazard Priorities, Hazard Ranks, and Response Codes Appendix D – Field Assessment Worksheets and Exposure/Risk Assessment Worksheets Appendix E – Costing Worksheets Appendix F - Photograph Log

2 Is it acceptable to abandon in place old Septic leach line?

Revised 5/30/2025

SI - Tartaro Yes, as long as the proposed approach does not impede or negatively impact the work of the project and complies with ADEQ permitting requirements.

3 Would it be acceptable to alter the Septic design using drilled vertical holes for leach lines when hard rock is encountered? Revised 5/30/2025

SI - Tartaro Yes, as long as the proposed approach does not impede or negatively impact the work of the project. The proposed solution must meet the septic system capacity requirements and comply with ADEQ permitting requirements.

4 Is it acceptable to leave the existing culvert in its current location; and to relocate the proposed septic tank to the southeast (approximately 20ft) enough to avoid conflict with the culvert drainage Revised 5/30/2025

SI - Tartaro Yes, as long as the proposed approach does not impede or negatively impact the work of the project and complies with ADEQ permitting requirements.

5 What activities, if any, can be done during the Spotted Owl breeding season? Please be specific.

SI - Tartaro Work in enclosed interior spaces that cannot be heard from the exterior of the building or on the work site will be permitted.

6 Who will be the building inspector, and will an inspection/permit card be issued?

SI CMD The COTR or their approved agent will do the inspections and an inspection document will be provided.

7 Will the required special inspections be paid for by Owner or Contractor?

SI - Tartaro Testing will be paid for by General Contractor. Please note the following specification change: replace Owner with General Contractor in sections 042000.310.A;

053100.3.4.A; 262816.3.4.B; 321216.3.6.A

8 Will retention be reduced to 5% when the project is satisfactory over 50% complete?

SI Ocon/CMD The reduction of retention is at the discretion of the COTR

9 Would the Owner accept Retention Bonds in lieu of 10% retention being held?

SI OCon/CMD No

Existing Concrete Pier Extension

Door Hardware

Floor Drain Deep Trap Seal

No. RFI Response By Answer 10 Describe the Pay Application approval process, how long will payments take?

SI Ocon/CMD Refer to Division 1 Section 61 Schedules and Payments for additional information.

11 Who will designate the parking area for personal vehicles?

If is, please advise where is this area?

SI - Tartaro Division 1, "18.1 No personal vehicles will be allowed at the construction site". There is a limited number of parking spaces at Basecamp. Potentially a number of spaces could be made available for designated contractor car pool vehicles. The COTR will determine availability and designate parking accordingly.

12 Is there a page limit for the technical proposal? SI Ocon/CMD No, there is no page limitation.

13 What is the anticipated start date? SI OCon/CMD Assume 60 days from proposal submission 14 Temporary Shoring - Sheet No. A-103 is showing waterproofing from approximately 11’-0” above the first floor elevation to approximately 3’-6” below the bottom of the footing. With the steep slopes adjacent to the retaining wall, the excavation will require temporary shoring at the Commons Building First Floor and New Dormitory First Floor. Sheet G-002 does not list this the shoring as a deferred approval. Please provide the extent of the shoring and the structural design.

SI - Tartaro (1) See Spec Section 312316 for additional information. (2) Provide a new Deferred Submittal for, "6. Sheeting and Shoring Shop Drawings". (3) Provide a new Structural Deferred Submittal for "Sheeting and Shoring Shop Drawings" and provide engineered Shoring Shop Drawings.

15 Waterproofing Drainage - Sheet No. A-103 Detail 3, Wall Section – New Waterproofing, is calling to ‘Apply Waterproofing Membrane, Drain Board, and Filter Fabric at Exterior of Retaining Wall From Bottom of Foundation to 1’- 0” Above Finish Grading at Building, Extend Waterproofing The Length of Rip-Rap’. a. The detail is not showing a perforated drain pipe with sock and gravel at the top of the footing to remove the water from behind the wall. Is this required with the drain board? If yes, please provide a specification section and details.

SI -Tartaro

BWS

(1) Provide drainage pipe at base of Common Building and New Dormitory Lobby - CMU Building walls and outfall in riprap at grade adjacent to parking lot. Coordinate changes with 3/A103, B/A301 , 1/A501. (2) Provide waterproofing and drainage pipe at base of Pump Room wall with outfall at concrete splash block location to be determined.

Coordinate changes with A104 and A301 5/A301 (3) Provide drain pipe at base of foundation wall membrane with filter fabric and 6" of gravel and coordinate with sheet waterproofing.

16 Waterproofing Drainage - Sheet No. A-103 Detail 3, Wall Section – New Waterproofing, is calling to ‘Apply Waterproofing Membrane, Drain Board, and Filter Fabric at Exterior of Retaining Wall From Bottom of Foundation to 1’- 0” Above Finish Grading at Building, Extend Waterproofing The Length of Rip-Rap’. b. The Rip-Rap shown on Civil Drawing C-102 is located along the full length of the New Dormitory. Please clarify ‘The Length of Rip-Rap.

SI -Tartaro Extend the length of the waterproofing to the corner of the Mechanical Room (Note 034) as indicated on 1/A104 FP and outfall in riprap at grade adjacent to parking lot.

Coordinate changes with 3/A103, B/A301, and 1/A501.

17 Concrete vs Gabion Retaining Walls - Sheet No. S101 is showing a site concrete retaining wall and footing per Detail 5 on S502 and civil sheet C102 is showing a Gabion Basket Retaining Wall at the last leg. Please clarify the extent of the concrete retaining wall versus the extent of the gabion basket retaining wall.

SI -Tartaro Comply with Note 16 on C102 and Gabion Retaining Wall information and details. There is no concrete retaining wall at the Gabion wall location.

18 Demolition Keynotes Architectural site Plan A-101, Detail 2 Demolition site Plan, is calling for Keynotes 003, 004, 017 and 027 that are not provided in the site Plan Keynotes Legend. Please provide keynotes and descriptions in the legend.

SI -Tartaro

BWS

Missing keynote text as follows : 003 - (E) DRIVEWAY

PAVING TO BE REMOVED. 004 - (E) PARKING AREA

PAVING TO BE REMOVED. 017 - (E) SIDEWALK TO BE

REMOVED. 027 - (E) SEPTIC SYSTEM TO BE REMOVED.

19 Sidewalk Scupper Architectural site Plan A-101, Detail 1 Architectural site Plan, and Architectural Plan A-104 are calling for Keynotes 031 for a scupper through sidewalk.

Civil drawings are calling out this scupper. Please provide additional information and details of this scupper.

BWS Detail for sidewalk scupper can be found at 6/A502.

20 Backflow Preventer - Specification Section 211313, Wet

Pipe Sprinkler Systems, states that a backflow preventer is required for this project. Please confirm if the backflow preventer is required and where it should be placed withing the fire sprinkler system.

BWS Yes. Backflow prevention is required on this project and shall be provided in Pump #103.

21 Fire Pump (a) Please confirm the type of fire pump required for this project? The drawings specify an electric fire pump on Sheet FP101. The Specification Section 213110 mentions a diesel fire pump in Section 2.06. (b) Advise on the necessary pump size for this project. (c) Advise on the required GMP and Psi (d) Does this required a transfer switch? (e) If the fire pump is electric, please provide electrical requirements.

SI -Tartaro

BWS

The fire pump for this project shall be an electric fire pump per revised specification section 213110. Pump shall be sized by the Fire Protection Subcontractor with the hydraulic calculations.

22 Heat Tracing - Specification Section 21 11 00, Fire Protection, has a requirement for heat tracing. Please advice on where this should be considered to ensure accurate pricing.

BWS The Fire Protection Contractor is responsible for providing the fire sprinkler design and shall be responsible to provide the requested feedback on the extent any main or branch fire protection piping that would be subjected to freezing in their design. The General Contractor shall review potential scope for the heat trace installation on the fire sprinkler system with the Fire Protection Contractor's designer.

23 signage - The Specifications Project Closeout Requirements Subsection 64.4.2 on page 37 of 766 states ‘Installation of all signage, including accessibility related signs, equipment instructions, identification labels and permanent directional signs. Sheet A-102 Keynote 222 states “Maintenance Door with signage ‘Door To Remain Closed At All Times’”. This is the only signage note on the plans and there is not signage specification. Please clarify on whether the signage scope of work is to be by the contractor or by the owner.

SI -Tartaro Provide all signage and labels per the specifications, not limited to section 230500 Basic Mechanical Materials and Methods and section 260553 Identification for Electrical Systems. Room signage is not within the project scope.

24 Existing Column Footing To Be Extended to New Grade - Architectural Sheet A-104 Key Note 221 states ‘(E) Column Footing To Be Extended To New Grade’. Structural drawing S-101 is not showing or calling this out. Please provide a foundation detail to include requirements for reinforcing bar and/or epoxy dowels, if required.

BWS See attached SK1 Existing Concrete Pier Extension

25 I'm getting asked by a few people if this Summit Dorm project is going to be Davis Bacon wages? Just wanted to get clarification for this.

SI-OCon/CMD Yes, this project is Davis Bacon Wages. Please see SAM.gov for specific wage rate information associated with the solicitation.

26 Pump Room Foundation - (a) Structural Sheet S-101 is calling out detail 9 on S-502 and detail 2 on S-501 at the Pump Room foundation. Both of these details reference to ‘See Foundation Plan”, “Reinforcing Per Footing Schedule”, and “Top of Footing Elevation See Foundation Plan”. These are not shown on the foundation plan or footing schedule.

Please provide size of footing (WxH), reinforcing requirements, and elevation for top of footing.

BWS Pump room wall footings shall be F1 footings (2'-6" x 12" cont) per the footing schedule on sheet S101. Top of footing elevation shall be minimum of 1'-6" below lowest adjacent grade per note on sheet S101.

27 Hours of Work, Workdays, and Government Holidays - The

Specifications Noise Control Section 31 under Subsection

31.3 states ‘The Contractor shall provide sound attenuation to maintain acoustic level below 75 dBA at a distance of 15m. (a) Is this requirement only for the off season hours?

It will be difficult to meet this expectation with the required hard digging. (b) Is it possible to work inside an enclosed space during the off seasons if acoustic levels are below the 75 dBA at a distance of 15m?

SI -Tartaro (a) No, only during the Spotted Owl Mating Season. (b) Yes, during the Spotted Owl Mating Season

28 Winter Asphalt Paving - The Specifications Section 321216 Hot-Mixed Asphalt Paving Subsection 1.4.B. states ‘Place hot-mixed asphalt surface course when atmospheric temperature is above 40 deg F and when base is dry. Base course may be placed when air temperature is above 40 deg F and rising. The project will take place between October and February with possible freezing temperatures and long drives.

(a) Please provide a asphalt specification with a atmospheric temperature below 40 deg F.

(b) Does this project require an additive to keep the asphalt hot for longer distances?

SI -Tartaro Comply with Specification Section 321216 - 1.4 SITE CONDITIONS. Schedule work to meet requirements.

29 Access Road Maintenance - The Specifications Section 312316 Earthwork Subsection 3.03.A site Access states ‘Access to the site will be over public and private roads.

Exercise care in the use of such roads and repair at own expense any damage thereto caused by Contractor’s operations. Such repair shall be to the satisfaction of the Owner or agency having jurisdiction over the road. Take whatever means are necessary to prevent tracking of mud onto existing roads and shall keep roads free of debris. (a) Please confirm it is the responsibility of the general contractor to maintain these roads during construction. (b) Can an allowance be included for the maintenance of these roads? Please provide allowance. (c) Who is responsible for the removal of ice from the access roads?

SI -Tartaro (a) The general maintenance of the summit road is the responsibility of FLWO staff not the General Contractor.

Normal wear and tear is covered by FLWO. The Contractor is responsible for addressing tracking of mud and debris from the site. (b) No; there will not be an established allowance. (c) FLWO maintenance staff is responsible for removal/treatment of ice and snow on the road.

30 Access Road Maintenance - The Geotechnical Report in the Specifications under 7.0 Earthwork Subsection 7.3 states ‘Excavations penetrating the underlaying bedrock will require the use of heavy-duty, specialized equipment to facilitate removal’. The amount of hard digging cannot be quantified because it is an unforeseen condition. (a) Please determine an allowance amount to be included in the bid.

SI -Tartaro (a) ‘Excavations penetrating the underlaying bedrock will require the use of heavy-duty, specialized equipment to facilitate removal’, price accordingly per the drawings and specification requirements. (a) No; there will not be an established allowance.

31 Existing Water Pump - There was a discussion on one of the job walks that there is an existing water pump that is functional but not in use at this time. (a) Is the existing water pump available for this project? (b) Who would be responsible for paying the electrical bill to get it started and running?

SI -Tartaro Not available

32 Common Building - It is assumed the Common Building will not be in use during construction. (a) Can the general contractor use the Common Building for construction offices, meeting spaces, and lunch area if the space is returned to its original condition?

SI -Tartaro Yes. If maintained, the Common Building can be used.

Contractor and COTR to document condition, acceptable uses and the general return standard after award. NOTE:

the septic field will be disconnected and the use of plumbing fixtures will not be feasible or allowed.

33 Common Building - It is assumed the existing Dormitory will not be in use during construction. (a) Can the general contractor use the Dormitory for construction offices, meeting spaces, and overnight lodging if the space is returned to its original condition and cleaned on a weekly basis? (b) Please provide the terms to use the Dormitory (c) Subsection 14.4 of the Contractor Use of Premises states ‘The Contractor shall reimburse the Smithsonian Institution for security and inspection services provided by the Smithsonian when the Contractor chooses to work outside the normal workdays and hours, as identified herein.

However, the Contractor will not be charged for is overtime security and inspection services, if, in the opinion of the COTR, the work cannot be done during the normal working days and hours due to requirements of the Smithsonian.

With the contractors staying in the existing dormitory overnight, does this requirement not apply? If this does apply, then provide the cost for overnight security.

SI -Tartaro (a) No. The existing dormitory will be in use. (b) Not applicable (c) No, does not apply

34 Existing Column Footing To Be Extended to New Grade - (a) Architectural Sheet A-104 Key Note 221 on Detail 1 New Dormitory – First Floor states ‘(E) Column Footing To Be Extended To New Grade’. Architectural Sheet A-103 Detail 1 is showing waterproofing against the existing building, so there will be excavation around this footing. Detail 3 on A- 103 states ‘Assumed location of footing depth and dimension unknown’, so it is assumed the footing for this column on A-104 Detail 1 is also unknown. The excavation around this footing may require additional foundation or shoring against the existing building. Please confirm this will not be required. If required, please provide a foundation design or shoring design to hold up the existing walkway during the excavation.

BWS The existing column and existing column footing are to remain. Only the concrete wrap around the existing column is being extended up above new existing grade to protect the existing column from the soil. Existing drawings are unclear of exactly where the top of the existing footings are, but based on the as-built drawings all bottom of existing footings are a minimum of 3'-0" below existing grade. It is not anticipated that shoring of the existing column foundation will be required for water proofing. Design of shoring is means and methods and is the responsibility of the contractor. We can provide assistance in what maximum loads need to be supported if required.

35 Existing Column Footing To Be Extended to New Grade - Civil Sheet C-104 Key Note 18 states ‘Ground Elevation at New Column. Provide Rip-Rap over filter fabric for all areas excavated for installation of column foundation. Typical for all columns’. Architectural Sheet A-101 is only showing the hand placed and grouted rip-rap on the plan east side of the building. Please keep in mind the 4x8 cement fiber board sheets will need to be installed around the rip-rap and in a two foot minimum space. (a) Please provide a detail with additional description for this Rip-Rap. (b)Does the rip-rap required over the over-excavation, footing excavation, or over the entire areas disturbed by excavation?

BWS Additional description of rip-rap and grading in area of column footings provided.

36 Construction Schedule - The given construction time allowed on the site is not clear. Please provide a more clear start and finish date for each year.

SI -Tartaro The Spotted Owl Mating Season restriction for exterior work is from March 1 through August 31, see RFI 27 response

37 Concrete Piers - Sheet S101 shows two typical details for HSS columns; Detail 5 on S501 shows 2ft dia concrete and Detail 4 on S502 shows 1ft 6” dia concrete. Please clarify if the 1ft 6” dia concrete columns are to be used with the braced columns only.

BWS 2'-0" diameter piers will be used for all HSS6x6 columns including the braced frames. Detail 4/S502 is incorrect and should indicate a 2'-0" diameter pier with 6-#6 verts similar to detail 5/S501. The 1'-6" diameter piers will only occur on the HSS4x4 stair columns.

38 Grouted Rip-Rap - Please clarify if details 1,2,3 on sheet

C104 showing hand placed rip rap are to be in grout/mortar OR only have filter fabric beneath the rock without grout.

SI -Tartaro All hand placed rip rap in grout/mortar to be over filter fabric typical.

39 Storm Drain Culvert - The storm drain culvert is shown to be relocated on Sheet C102; a new swell is also shown to route storm water away from the leach field area. Should the bidders plan for the removal of the large rock outcrops to facilitate the new swell or can bidders assume that the swell can meander a best fit path avoiding rock outcrops (Past RFI), this could result in possible shifting of septic leach lines to accommodate the swale.

SI -Tartaro Yes, the swell may meander as long as the proposed approach does not impede or negatively impact the work of the project, The proposed solution must meet the septic system capacity requirements and comply with ADEQ permitting requirements.

40 Septic Leach Field Depth - The new septic leach field is very specifically designed but will conflict heavily with the large boulder outcrops and possibly several trees. A note per C103 states to minimize disturbance to existing vegetation and leach field. similarly the rock type is extremely hard and with boulder outcrops means it could be very shallow in places which could require rock breaking. The geotechnical exploration shows two test borings for the project with one meeting refusal at 3.5 feet deep and the other at 7ft deep; however, the leach field trench is required to be 8 feet deep. (a) Is there any additional information that could be provided to bidders regarding the septic leach field installation that could direct bidders and help avoid a future change order. (b) For example: If solid rock is encountered at a shallower depth (seven feet deep for instance) could the trench bottom (depth) vary if the leach pipe were at design depth? Or is it preferred that solid rock be broken out for a level trench bottom (at full 8ft depth)? Or could the trench width increase to allow a shallower trench to avoid cost increases (if rock were found to be shallower during construction)?

SI -Tartaro (a) No there is no additional geotechnical information at this time. (b) Yes, As long as the proposed approach does not impede or negatively impact the work of the project and the proposed solution meets the septic system capacity requirements and complies with ADEQ permitting requirements.

41 Septic Tank Demolition - Per Sheet C103 there is a note outlined with a revision cloud that describes abandoning the existing septic system in place. Adjacent to it under the “construction sequencing” demolition of the septic tank is still listed. Please clarify how the septic tank should be abandoned in place. Shall it be left intact, pumped out, crushed, and/or removed, etc?

SI -Tartaro Under “Construction Sequencing” Delete Note 4 and follow sequence in clouded Revision 1 Note instead.

Contractor must comply with ADEQ Closure/Abandonment permit requirements.

42 Elevation Clarification - Sheet C-504 detail 5 shows the spool pipe (4” or 2.5”) with a 3ft depth dimension that is unclear; the pump station room floor elevation is shown to be 8367.17ft (per sheet C102) and the tank floor elev is shown to be 8359.7ft (per C504) a difference of roughly 7ft; A retaining wall is shown adjacent to the sidewalk (on both sides) per C104 plan view detail with footer shown at a minimum of 3.5’ deep per S502 on the side closer to the water tank. Can the spool pipe penetrate thru the retaining wall if it were feasible (this may not be feasible due to orientation of pipe and swale to wall)? After sketching a profile, the retaining wall footer toe location relative to the adjacent swale appears also to require the footing to be deeper than the minimum (potentially 3.5ft additional depth to be 18” below the swale) driving the depth of the spool pipe to 7 to 10 feet deep if needed to pass under the retaining wall footer. Can this be clarified?

BWS Detail C-504 modified to provide clarification of pipe size and routing Elevations updated to match grading plan sheets.

43 Existing Concrete Curb - A vertical concrete curb exists that will be impacted by the culvert removal/replacement (not indicated in drawings). similarly, the Electrical trench will impact the existing curb at another location, please indicate if bidders should remove/replace the curb to facilitate these new items.

BWS Callouts added regarding removal/replacement of concrete curbs.

44 Striping - Per the Specifications “Work also includes concrete wheel stops and striping as indicated.” No striping or wheel stops have been found in the drawing, please clarify if this is correct.

SI -Tartaro

BWS

Concrete wheel stops and striping are not to be included at this time. Note removed.

45 Curb - Note 18 on sheet A101 notes a curb, is this a non-applicable legacy note? This is not shown in the grading plan.

SI -Tartaro Correct, delete Note 18

46 Would the Smithsonian permit the use of helicopter operations for material transport to the Summit Bowl area in lieu of relying solely on Mount Hopkins Road? Our current plan anticipates 200+ helicopter sling loads; we would only require a designated area for material drop—no helicopter landing would be necessary. Thank you for your time and consideration. We look forward to your response and the opportunity to contribute to this exceptional project.

SI -Tartaro The use of a helicopter would need to be coordinated with FLWO operations. The US Forest Service would need to be consulted for their concurrence.

47 Can land surveyors come out and perform their work before September 1st?

SI -Tartaro Yes as long as they meet the requirements of, "The Contractor shall provide sound attenuation to maintain acoustic level below 75 dBA at a distance of 15m."

48 Page C103 has a note that says to demolish the existing restrooms at the start of construction and the has a not under “Construction Sequencing” that says it should be demolish after the new septic tank system is finished.

Please clarify if we can demolish the restrooms at the start of construction.

SI -Tartaro “Construction Sequencing” Note 4, delete in it's entirety.

Correct, demolish the restrooms at the start of construction.

49 The specification refers to AISC approved steel fabricator and erector, an approved fabricator/ erector would be a fabricator/ erector that builds to the required specifications, as well as AISC standards. On this project Is it acceptable to use a fabricator/ erector that builds to the standards of AISC and the specifications on this project yet is not certified by AISC and will offer 3rd party inspection for fabrication.

SI - Stewart Yes, so long as the 3rd party inspector confirms they meet the requirements of being an AISC certified fabricator and can provide data to back up the conformation which is signed and sealed.

50 Sheet S101 shows two typical details for HSS columns;

Detail 5 on S501 shows 2ft dia concrete and Detail 4 shows 1ft 6” dia concrete. Please clarify if the 1ft 6” dia concrete columns are to be used with the braced columns only.

BWS 2'-0" diameter piers will be used for all HSS6x6 columns including the braced frames. Detail 4/S502 is incorrect and should indicate a 2'-0" diameter pier with 6-#6 verts similar to detail 5/S501. The 1'-6" diameter piers will only occur on the HSS4x4 stair columns.

51 Please clarify if details 1,2,3 on sheet C104 showing hand placed rip rap are to be in grout/mortar OR only have filter fabric beneath the rock without grout.

SI -Tartaro All hand placed rip rap in grout/mortar to be over filter fabric typical.

52 The storm drain culvert is shown to be relocated on Sheet C102; a new swell is also shown to route storm water away from the leach field area. Should the bidders plan for the removal of the large rock outcrops to facilitate the new swell or can bidders assume that the swell can meander a best fit path avoiding rock outcrops (Past RFI), this could result in possible shifting of septic leach lines to accommodate the swale.

SI -Tartaro Yes, as long as the proposed approach does not impede or negatively impact the work of the project. The proposed solution must meet the septic system capacity requirements and comply with ADEQ permitting requirements.

53 The new septic leach field is very specifically designed but will conflict heavily with the large boulder outcrops and possibly several trees. A note per C103 states to minimize disturbance to existing vegetation and leach field. similarly the rock type is extremely hard and with boulder outcrops means it could be very shallow in places which could require rock breaking. The geotechnical exploration shows two test borings for the project with one meeting refusal at

3.5 feet deep and the other at 7ft deep; however, the leach field trench is required to be 8 feet deep. Is there any additional information that could be provided to bidders regarding the septic leach field installation that could direct bidders and help avoid a future change order. For example:

If solid rock is encountered at a shallower depth (seven feet deep for instance) could the trench bottom (depth) vary if the leach pipe were at design depth? Or is it preferred that solid rock be broken out for a level trench bottom (at full 8ft depth)? Or could the trench width increase to allow a shallower trench to avoid cost increases (if rock were found to be shallower during construction)?

SI -Tartaro Yes, as long as the proposed approach does not impede or negatively impact the work of the project. The proposed solution must meet the septic system capacity requirements and comply with ADEQ permitting requirements.

54 Per Sheet C103 there is a note outlined with a revision cloud that describes abandoning the existing septic system in place. Adjacent to it under the “construction sequencing” demolition of the septic tank is still listed.

Please clarify how the septic tank should be abandoned in place. Pumped out/crushed/removed, etc?

SI -Tartaro The septic tank should be abandoned in place and comply with ADEQ Closure/Abandonment permit requirements.

55 Sheet C-504 detail 5 shows the spool pipe (4” or 2.5”) with a 3ft depth dimension that is unclear; the pump station room floor elevation is shown to be 8367.17ft (per sheet C102) and the tank floor elev is shown to be 8359.7ft (per C504) a difference of roughly 7ft; A retaining wall is shown adjacent to the sidewalk (on both sides) per C104 plan view detail with footer shown at a minimum of 3.5’ deep per S502 on the side closer to the water tank. Can the spool pipe penetrate thru the retaining wall if it were feasible (this may not be feasible due to orientation of pipe and swale to wall)? After sketching a profile, the retaining wall footer toe location relative to the adjacent swale appears also to require the footing to be deeper than the minimum (potentially 3.5ft additional depth to be 18” below the swale) driving the depth of the spool pipe to 7 to 10 feet deep if needed to pass under the retaining wall footer. Can this be clarified?

BWS Detail C-504 modified to provide clarification of pipe size and routing Elevations updated to match grading plan sheets.

56 A vertical concrete curb exists that will be impacted by the culvert removal/replacement (not indicated in drawings).

similarly the Electrical trench will impact the existing curb at another location, please indicate if bidders should remove/replace the curb to facilitate these new items.

BWS Callouts added regarding removal/replacement of concrete curbs.

57 The Existing Bowl Dorm is described in the RFP as being demolished concurrently with the work (if option is exercised) to be completed within the 520 calendar days.

Sheet A101 describes demolishing after completion per note 002 (sheet C102 note 2 also), please clarify if there is an expectation of waiting until the very end of the project to demolish the old dorm (assuming the dorm demolition option is approved).

SI - Tartaro Correct, to be demolished after completion per note 002 (sheet C102 note 2 also)

58 The 520 calendar days allowed for the project duration will limit civil items to essentially 360 work days (two separate 6 month intervals). Is it expected that other trades will be allowed to work during the owl season such as building construction? If the building envelope is not complete before March 2026 will all work need to stop until the following September 2026? The best course would be to have the new dorm building fully enclosed within the first 6 months (including site prep/demo/tree removal, drainage/slope protection, retaining walls, excavation/foundations, utility, building structure/roof/siding, snow event delays are possible also) prior to the owl season. Could the project run into the 2028 calendar year if scheduling logistics simply cannot be achieved and this timeline of (February 2027 completion as it is understood) is not met.

SI - Tartaro Yes, at the discretion of the COTR/Government.

59 The asphalt paving work should be scheduled for the later parts of the civil work (prefer basically last civil item). The best months to lay down asphalt on the mountain will be September or October due to temperature constraints.

Would it be acceptable to complete this work beyond the 520 calendar days if deemed necessary (due to project timeline and weather constraints) potentially September 2027?

SI -Tartaro Yes, at the discretion of the COTR/Government.

60 Per the Specifications “Work also includes concrete wheel stops and striping as indicated.” No striping or wheel stops have been found in the drawing, please clarify if this is correct.

SI -Tartaro Concrete wheel stops and striping are not to be included at this time

61 Note 18 on sheet A101 notes a curb, is this a non-applicable legacy note? This is not shown in the grading plan.

SI -Tartaro Correct, Note 18 to be deleted

62 Please confirm that the requirement to establish a temporary field office at the project site is mandatory and not optional.

SI-CMD Yes and see RFI 32 response.

63 Is the contractor field office intended for exclusive use by the GC and subcontractors, or will Government personnel (e.g., COTR, CxA) also occupy or use the facility?

SI-CMD Yes, for exclusive use by the GC and subcontractors.

64 Is a dedicated office space within the contractor’s trailer required for use by Government personnel, such as the COTR or Commissioning Authority?

SI-CMD No

65 Are there any minimum requirements regarding the number of offices, conference areas, or restroom facilities within the contractor trailer?

SI-CMD No

66 How long is the contractor field office required to remain on site? Should it be maintained through final punch list and acceptance, or removed upon substantial completion?

SI-CMD Removed upon substantial completion to be coordinated with COTR.

67 What level of finish is required for the interior/exterior of the field office and any associated structures? Are painted exteriors or skirting required?

SI-CMD At the discretion of the GC and see RFI 32 response.

68 Are lockable security measures required for the contractor trailer? If so, are these to be furnished by the GC or provided by the Government?

SI-CMD Yes lockable security measures will be required and furnished by the GC.

69 Please confirm whether utility connections (power, water, data) for the field office are the responsibility of the GC and whether coordination with Government IT/security teams is required.

SI -Tartaro Power, Data and limited water without sewer is available at the Common Building. Large amounts of water for construction activities would need to be provided and stored on site by the GC.

70 Please confirm that the General Contractor is responsible for furnishing the ceiling fans, including all accessories (e.g., down rods, light kits, wall controls).

SI -Tartaro Yes, General Contractor is responsible for furnishing the ceiling fans, including all accessories.

71 Are the ceiling fans to be provided under the base contract, or are they intended as Government-furnished equipment

(GFE)?

SI -Tartaro The ceiling fans are to be provided under the base contract.

72 Please confirm whether the wall-mounted control unit requires a standard gang box or specialty rough-in from the electrical contractor.

BWS The wall control switch from the basis of design ceiling fan manufacture, Hunter, works with a standard gang box per their installation instructions. Per specification section 114001, provide the fan with the wall mounted control.

Reference RFI 74 regarding substitutions, and verify with manufacturer of fan included in bid.

73 Are structural blocking or reinforcements required at fan locations due to downrod length and slope adapters? If so, should these be coordinated under Division 06 or 09?

SI -Tartaro Install per manufacturer and NEC requirements.

74 Ceiling fans are specified as “Hunter Erling” or equal. Are there any pre-approved substitutions or preferred vendors the Government would accept without formal submittal deviation?

SI -Tartaro No there are no preapproved substitutions, use CSI Substitution Form 13 post award.

75 Please confirm that the lighting integrated into the fan (LED kit) does not require dimming control or low-voltage wiring beyond standard switching.

BWS The basis of design ceiling fan as specified requires dimming, and the wall control switch for the fan from the fan manufacturer, Hunter, comes with light adjustment capability. There is no requirement for low-voltage wiring beyond standard switching for the Hunter fan wall control noted in their installation instructions. Reference RFI 74 regarding substitutions, and verify with manufacturer of fan included in bid.

76 Please confirm whether a specific area is designated for contractor staging, storage, or laydown on the project site.

If so, is a drawing or site plan available to illustrate its boundaries?

SI-CMD Specific area(s) will be confirmed post-award in consultation with the COTR and FLWO Operations/Maintenance

77 What is the approximate allowable size (in square footage) for staging and material storage? Is this area exclusive to the contractor or shared with other site users?

SI-CMD FLWO Maintenance Storage Road Locations by KM marker: KM13-13.5 3,500SF, KM16 400SF, Ridge 1,700SF, Iota at Bowl 1,500SF. No, theses areas are not for the "exclusive" use of the contractors and will be allocated at the discretion of the COTR in consideration of facility operations.

78 Are there any restrictions on the number or size of storage trailers or containers to be brought to the site for contractor use? If so, please confirm whether access, width, or length limitations apply.

SI-CMD The number or size of storage trailers or containers proposed for contractor use will be determined by the space available by the COTR. See Division 1 Section 16

CONTRACTOR DELIVERIES, HAULING AND ACCESS

79 Will a post-award staging map or logistics plan be issued by the Government to clarify contractor access and storage zones?

SI-CMD Yes. COTR will issue post award.

80 Are there any environmental or archaeological buffers (outside of NEPA-cleared zones) that limit placement of storage, trailers, or material stockpiles?

SI -Tartaro No, there are no "known" environmental or archaeological buffers (outside of NEPA-cleared zones) that limit placement of storage, trailers, or material stockpiles

81 Please confirm whether Division 33 (Utilities) is intentionally omitted from the specification set, or if utility work (e.g., underground water, sewer, fire service, and electrical ductbanks) is to be covered entirely under Divisions 22, 26, and 31.

SI -Tartaro Correct, utility work (e.g., underground water, sewer, fire service, and electrical ductbanks) is to be covered entirely under Divisions 22, 26, and 31.

82 For pricing and subcontractor breakout purposes, should site utility work traditionally assigned to Division 33 be grouped under a separate heading, or included in the respective mechanical, electrical, and earthwork divisions?

SI -Tartaro No, utility work (e.g., underground water, sewer, fire service, and electrical ductbanks) are to be covered entirely under Divisions 22, 26, and 31.

83 Does the Government intend to issue an addendum or clarification reclassifying site utility scopes that are currently distributed among multiple divisions without dedicated Division 33 specifications?

SI -Tartaro No.

84 Are there any inspection or material submittal requirements specific to underground utility installations (e.g., thrust blocks, hydrants, utility markers) that are not currently outlined in the provided specs?

SI -Tartaro No.

85 Please confirm whether a specific Government Energy Management Control System (EMCS) is required for DDC integration. If so, provide the platform name (e.g., Johnson Controls Metasys, siemens Design) and any associated interface requirements.

SI -Tartaro No.

86 Confirm whether the controls contractor is responsible for coordinating IT network access, firewall configurations, and IP assignment with the Government's IT team.

SI -Tartaro Confirmed, the controls contractor is not responsible for coordinating IT network access.

87 Please provide a complete sequence of operations (SOO) for all major HVAC systems (including ERVs, AHUs, FCUs, VAVs) to support accurate bidding of the DDC system under Section 230923. Current documents include only a partial description for the ERV unit and defer remaining sequences to post-award submittals.

BWS Sequence of Operations (SOO) for the Energy Recovery Unit (ERV) is provided on sheet MH701. No additional sequence is required for the fan coil or ductless split system units that operate from a factory thermostat. No additional AHU's or VAV's are provided on this project. The SOO and EMCS Points List requires the Control Contractor to submit the protocol implementation conformance 88 Please clarify the delineation of responsibilities between the Contractor and the Government regarding fire alarm system integration. Specifically: What is the make and model of the existing system head-end the new system must connect to?

SI -Tartaro The Fire is local to the building and does not require system integration.

89 Please clarify the delineation of responsibilities between the Contractor and the Government regarding fire alarm system integration. Specifically: Is the Contractor responsible for providing all labor, software, and hardware for integration up to the Government system boundary?

SI -Tartaro No, the Contractor is not responsible the integration to the Government system boundary. The proposed system is an addressable Honeywell Firelite system.

90 Please clarify the delineation of responsibilities between the Contractor and the Government regarding fire alarm system integration. Specifically: Is Government-furnished support, personnel, or proprietary access required to complete the interface?

SI -Tartaro No, Government-furnished support, personnel, or proprietary is not required.

91 Please clarify the delineation of responsibilities between the Contractor and the Government regarding fire alarm system integration. Specifically: Will a Government representative witness or validate system commissioning and final testing?

SI -Tartaro Yes, a Government representative will witness or validate system commissioning and final testing.

92 Confirm final quantities and fixture types per plumbing schedule vs. architectural plans (conflicts noted): 13 P-1 lavatories are listed in the fixture schedule, but 1 P-1A ADA lavatory is separately noted for Suite 201B. Verify if total is 14, or if P-1A replaces one of the 13.

BWS There are (13) P-1, and (1) P-1A, for a total of (14) fixtures.

93 Confirm final quantities and fixture types per plumbing schedule vs. architectural plans (conflicts noted): ADA unit P-2A is listed but not counted in the total for P-2. Confirm quantity for each type; architectural plans suggest more than one accessible toilet.

BWS There are (13) P-2, and (1) P-2A, for a total of (14) fixtures.

94 Confirm final quantities and fixture types per plumbing schedule vs. architectural plans (conflicts noted): Schedule includes ADA shower (P-3A) for Suite 201B. Confirm if standard P-3 count includes all others or if more ADA units are required

BWS There are (13) P-3, and (1) P-3A, for a total of (14) fixtures.

95 Confirm final quantities and fixture types per plumbing schedule vs. architectural plans (conflicts noted): Fixture schedule includes P-4 only. However, PQ402SH details a second mop basin type (P-5). Confirm if both are required, and if so, in which locations.

BWS Both P-4 & P-5 are required per the specifications on sheet PQ-402-SH, and both are called out on the plans PL-101-FP & PL-102-FP - see attached with the return of this document for a floor sink cutsheet. Nomenclature on PQ- 402-SH for P-4 should read as follows : WATTS, MODEL #FS- 740-3, 12'' x 12'' x 8'' CAST IRON SANITARY FLOOR DRAIN 96 Confirm final quantities and fixture types per plumbing schedule vs. architectural plans (conflicts noted): HB, HB-1, and HB-2 are defined in schedule, but locations are not shown on plan. Confirm total required of each and mounting locations.

BWS There are four (4) total hose bibbs located on this project and the fixture quantities in the Plumbing Fixture Schedule on sheet PQ401SH is correct.

97 Confirm final quantities and fixture types per plumbing schedule vs. architectural plans (conflicts noted): The total fixture unit counts at the bottom of PQ401SH don't appear to clearly match a full fixture-by-fixture tally. Confirm if these are schematic or final.

BWS The project totals at the bottom of the Fixture Schedule are for the waste and water fixture units and not quantities of fixtures. The Plumbing Contractor is responsible for all final fixture counts per the Plumbing Floor Plans.

98 Confirm if underground fire protection piping from property line to building is GC or utility scope.

SI -Tartaro All work is the GC scope, there is no "property line" or

"utility". All systems are part of the FLWO facility.

99 Clarify if fire sprinkler head layout shown on drawings meets NFPA-13 or requires redesign by subcontractor.

SI -Tartaro Provide Wet Pipe Sprinkler System per the Specifications.

The fire sprinkler head layout shown on drawings is informational and does not meet NFPA-13

100 Clarify which contractor (Division 22 vs. 23) is responsible for solar thermal integration piping.

BWS There is no solar thermal integration piping required on this project.

101 Provide clarification on VAV reheat coil control and integration with controls contractor.

BWS There is no VAV's or VAV reheat coil control or integration requirements on this project.

102 Confirm whether the final electrical panel schedule and one-line diagram are coordinated, and whether the arc-flash and coordination study should…