Amendment_0002_-_NP-MACA_001T(1).pdf

(x)

DTFH7117B00012

x x 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 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 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.

x

Sterling VA 20166-6511

EFLHD-CO

21400 Ridgetop Circle Construction Office Eastern Federal Lands Highway Div.

Federal Highway Administration

Sterling VA 20166-6511

EFLHD-AC

21400 Ridgetop Circle Acquisitions Office Eastern Federal Lands Highway Div.

Federal Highway Administration

NP-MACA 001T(1)02/24/20170002

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

01/05/2017

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 date, 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.)

Project: NP-MACA 001T(1) - Mammoth Cave NP - Visitor Center Bridge

The purpose of this Amendment is to:

1) Revise the Plans as follows:

a) Include construction access to south abutment.

b) Update bridge plans to modify the strand layout for the precast beams, incorporate all the affected elevation changes in the abutments and piers, and revise notes to cover the changes.

2) Provide a summary of responses to questions/clarifications asked by potential bidders.

3) Reschedule the Bid Opening date to March 9, 2017 at 2:00 p.m. EST.

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)

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA

FAR (48 CFR) 53.243

NSN 7540-01-152-8070

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 .

Amendment No. 0002

Info Page 1 of 1

U.S. DEPARTMENT OF TRANSPORTATION

FEDERAL HIGHWAY ADMINISTRATION

EASTERN FEDERAL LANDS HIGHWAY DIVISION

Amendment No. 0002 Project NP-MACA 001T(1)

Mammoth Cave National Park Visitor Center Pedestrian Bridge

Solicitation: DTFH71-17-B-00012

The purpose of this Amendment is to:

1) Revise the Plans as follows:

a) Include construction access to south abutment.

b) Update bridge plans to modify the strand layout for the precast beams, incorporate all the affected elevation changes in the abutments and piers, and revise notes to cover the changes.

2) Provide a summary of responses to questions/clarifications asked by potential bidders.

3) Reschedule the Bid Opening date to March 9, 2017, at 2:00 p.m.

Plan Sheet changes

Plan Sheet changes

Delete Plan Sheets A05, R01, R03, R05, R06, R07, R08, R13, and R14, and substitute the amended Plan Sheets A05, R01, R03, R05, R06, R07, R08, R13, and R14.

1) Sheet A05 (Construction Access and Staging Area) updated to add a construction access path to the south abutment.

2) Sheet R01 (Bridge Plans - General Notes) updated to revise the estimated effective prestress strand forces.

3) Sheet R03 (Bridge Plans - Plan and Elevation) updated to revise the clearance and crown dimensions and callouts.

4) Sheet R05 (Bridge Plans - Precast Abutment Layouts) updated to revise the bearing seat elevation.

5) Sheet R06 (Bridge Plans - Precast Abutment Reinforcement) updated to revise the bearing seat elevation.

6) Sheet R07 (Bridge Plans - Precast Pier Layouts) updated to revise the pier dimensions and elevations.

7) Sheet R08 (Bridge Plans - Precast Pier Reinforcement) updated to revise the pier dimensions.

8) Sheet R13 (Bridge Plans - Span 1 & 3 Girder Details) updated to revise the strand layout patterns camber requirements, and notes.

9) Sheet R14 (Bridge Plans - Span 2 Girder Details) updated to revise the strand layout patterns camber requirements, and notes.

Questions / Clarifications

Bidders can send written questions or inquiries for clarification to: eflhd.contracts@dot.gov.

Questions can be submitted at any time, but questions submitted within 7 days of the bid opening may not be answered in time for the bidder to properly incorporate the responses into their bids.

The following questions and issues were submitted via email. The Government response or clarification is provided. Due to the repetitive nature of several questions and issues, the wording of the questions may have been revised and some questions have not been included.

The Government’s direct response to the sender may also have been updated below for better clarity.

1. Could the concrete color spec from Subsection 552.03 (pg. J-10) be deleted? Substructure producers find it difficult to meet and/or accept liability to match color with cast-in-place contractor. Maybe an alternate to have the contractor apply masonry coating on all exposed concrete after construction with color and spec to be submitted prior to construction for approval.

Response: The concrete color requirement will not be deleted. Test panels are required as specified in the FP (standard specification book) and Special Contract Requirements (SCR’s – J Pages). Once a test panel is approved, each producer will be required to match the approved test panel for the item they are producing, not the test panel from another producer.

2. Color requirements need further clarification. Is microsilica considered to be a coloring agent? Clarification is needed for the Class 2 - Rubbed Finish. 552.16(b) is not included in the job specifications.

Response: Colored concrete requirements are covered in Section 552 of the FP and are standard for most bridge work. The specific requirements for this project are also spelled out in Section 552 of the SCR’s (pg. J-10). The coloring agent is required to meet Subsection 711.05 of the FP. For mixes with microsilica, see Subsections 552.03 and 725.04 of the FP. Microsilica is not considered a coloring agent.

If the Contractor elects to not use any coloring agent to try and achieve an approved color match, the Government will only review one test panel that doesn’t use a coloring agent.

Please also note that extensions will not be granted due to delays caused by the Contractor’s failure to achieve an approved color match.

3. Could an alternate section for the precast concrete beams be accepted? Some producers can’t make a Type II beam. Could a box beam and/or Type III beam be considered as an alternate?

Response: Alternate beam sections will not be accepted. The Type II is a common beam section, and there are producers that can make the Type II beam.

4. No supplier will quote the precast piers. Could a cast-in-place concrete alternate be accepted?

Response: The Contractor may submit cast-in-place piers in lieu of precast piers for review and consideration. However, contract time outlined in the Solicitation’s B Pages will not be extended.

5. Could an alternate strand pattern / size for the concrete beams be accepted upon review and approval from the FHWA? A producer refuses to quote because the strand pattern changes on the concrete beam from end section to mid-span. The 2” coverage at mid-span and 4” coverage at girder span is difficult to construct.

The “intended final cambers” shown on and sheets R13 & R14 are given as 3 3/16” for the shorter beams and 5 11/16” for the longer beams and does not appear to have been designed per the strand pattern given and appears independent of the camber information provided in the tables. In short, the beam design does not meet the intended camber criteria. The design shown is not a standard design and not proven.

Could the estimated camber note be deleted? Producers refuse to submit quote with such a note.

Response: The strand pattern has been modified as part of Amendment 2. The estimated camber note has been deleted as part of Amendment 2.

6. What kind of lights are required?

Response: The requirements for the lights are provided under Subsection 556.03 (a) through (h) of the SCR’s.

7. Plan sheet R01 (Bridge Plan 1 of 24) states, “Furnish Class A (AE) concrete for precast pier, precast abutments unless otherwise noted”. Request to change to Class D or Class D Modified. Need to have consistent design mix for all products to ensure color consistency.

Response: The concrete Class A(AE) requirement for precast piers and abutments will not be changed. See above for color matching question responses.

8. Plan sheet R01 (Bridge Plan 1 of 24) states, “Furnish Class P concrete for prestressed girder units.” Request to change to Class D or Class D Modified.

Response: The concrete Class P requirement for prestressed girders will not be changed.

9. The tolerance table given on page J-12 of the specifications will be extremely difficult if not impossible to meet. We are able to meet the tolerances for I-beams used by the State of Kentucky.

Response: The tolerances shown in Table 552-5A (page J-12) of the SCR’s is for the precast piers and precast abutments, not for the I-beams. The tolerances for the prestressed I-beams are shown in Table 553-1 of the FP.

10. Fit-up - Need to confirm that the use of templates will be adequate to ensure alignment of connection devices for piers and abutments.

Response: Templates will be acceptable to ensure alignment of connection devices for piers and abutments.