Amendment_8_0008.pdf

(x)

140P2025R0066 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 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 1 Denver Federal Center, Building 50 NPS, DSC Contracting Services Div

07/28/20250008

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

06/30/2025

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.)

The purpose of this amendment is to provide a copy of the Question and Answers from prospective contractors as of 7.31.2025. No more questions will be accepted. All other terms and conditions remain unchanged.

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)

Stormy Gallagher

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 .

Question: Answer: Amendment No.:

KNRI 257081 - Solicitation 140P2025R0066

Is there any possibility that this 365-day window could be expanded to include all of 2026Assuming an extension is allowed, If the contractor was unable to start on the project until after the in-water work restrictions were lifted in 2026 would that be acceptable?

The period of performance for this project remains 365 calendar days from the issuance of the Notice to Proceed (NTP). The NTP may be issued as early as acceptance of Division 1 submittals as long as it is outside the period of in-water work restrictions. Any in-water, or near-water work should avoid the April 15 – June 1 timeframe (every year) to allow for undisturbed fish seasonal fish movement. The

National Park Service (NPS) will coordinate with the Contractor to identify a mutually agreeable NTP date within this allowable window. Should the Contractor elect to begin work at a later date, that is acceptable provided the full scope of work can be completed within the 365-day performance period.Please note that further erosion of the Knife River bank—including changes to channel bottom elevations or slope profiles occurring after the June 18–20, 2024 existing conditions survey—are considered part of the

Contractor’s risk and will not be treated as a changed site condition.

The Knife River is inherently dynamic, and site conditions at the time of construction may differ from those documented during design. 3

Will any work be allowed during the winter months?

Yes, work is permitted during the winter period; however, it carries elevated risk due to weather-related hazards. Appropriate mitigation strategies should be in place to ensure safety and continuity. 3

The specs state that the color of riprap shall be approved by the CO prior to delivery to the project site. Is there a specific color you are looking for?

Locally sourced riprap around Lake Sakakawea in North Dakota typically consists of gray to light brown / tan stone, often granite, depending on the source quarry (and tends to reflect the geology of the region.) 3

Can the excavation of the river bottom/channel be done underwater with GPS? The dewatering spec leads me to believe the channel needs to be dewatered.

Excavation and construction activities within the river channel must be performed in a manner that ensures compliance with the

Contract Documents, including permits, environmental protection and erosion control requirements. While GPS-guided excavation may be technically feasible in submerged conditions, the nature of the work—particularly the placement of granular bedding, geotextile fabric, and riprap at the toe of slope and within the temporary river crossing—requires precise placement and visual inspection.

To achieve this, the channel will need to be dewatered or otherwise isolated to allow for proper construction and verification. The dewatering specifications were included to support this requirement and to minimize turbidity and sediment transport. If the Contractor proposes an alternative method to perform the work “in the wet,” it must be submitted for review and approval by the Engineer and must demonstrate compliance with all environmental and performance requirements. 4

The past Performance Questionnaire that was sent out is not fillable. You can not select a rating. Do you have a fillable form? 4

Can a NAVFAC/USACE Past Performance Questionnaire or a

Contractor Performance Assessment Report (CPAR) be used in place of the Past Performance Questionnaire provided? 4

What is the water/river elevation and flow rate?

Real-time and historical water surface elevation and flow rate data are publicly available through the USGS National Water Information

System:

· Knife River at Hazen, ND – USGS Gauge No. 06340500

· Missouri River near Stanton, ND – USGS Gauge No. 06340700

· Knife River at Stanton, ND – USGS Gauge No. 06340590 This is the most representative gauge located approximately 1.5 miles upstream of the project site.

Contractors are encouraged to monitor these gauges regularly to inform construction planning and water management strategies.

Data can be accessed at: https://waterdata.usgs.gov

NPS may consider including attached Table 1 as part of the response

(or the Floodplain Statement of Findings). 4

CLIN 4 & 5 are listed as alternates. Are these CLINs intended as alternates, or will they be awarded with the project?

Contract Line Item Numbers (CLINs) 0001 through 0003 constitute the base bid. CLINs 0004 (Topsoil and Erosion Control) and 0005

(Temporary Access Road and Temporary River Crossing) are listed as bid alternates in accordance with the NPS’s funding strategy.

While these items are essential to the completion of the project, they were structured as alternates to allow the Owner (NPS) flexibility in allocating funds from multiple sources. It is the intent of the Owner to award all CLINs, subject to the availability of funding.

Final determination of award will be made at the discretion of the

Owner. If needed, clarifying language may be issued via addendum. 4

Could you please clarify what the term rock surge/pit run surge means as it is called out in Table 3 for the Mix

Requirements for Grade II Void Filled Rip rap? After speaking with local aggregate sources on one produces a 7” minus crushed rock surge.

Crushed rock surge’ refers to angular rock produced by mechanically crushing larger stone. ‘Pit run surge’ is naturally occurring material excavated from a pit or quarry, typically containing a mix of sizes and fines. For Grade II Void Filled Riprap, the intent is to use angular rock for the larger size class and include fines in the 4" class to effectively fill voids and enhance stability. 6

On page 2 of 21 in the plans under construction sequence, note 2 states “The contractor shall conduct stream work, including installation of embankment, grading, stabilization measures, and seeding and mulching, on a section of the stream that can be entirely completed/stabilized in a single day”. Following this note will make this project constructable.

Can you please clarify if we will be held to this while constructing the project.

The contractor shall conduct stream work—including embankment, grading, stabilization, and seeding/mulching—in a manner that leaves all disturbed areas in as stable condition as practical at the end of each workday. Work should be sequenced to avoid leaving any portion of the stream exposed or vulnerable to erosion overnight as much as practical. 7

Does the void filled rip rap quantity on page 2 of the plans include the quantity needed for the temporary river crossing?

No, the void filled riprap quantity shown on page 2 does not include material for the temporary river crossing. That should be accounted for under the temporary river crossing item. 6

On page 2 of 21 in the plans under construction sequence, note 2 states “The contractor shall conduct stream work, including installation of embankment, grading, stabilization measures, and seeding and mulching, on a section of the stream that can be entirely completed/stabilized in a single day”. Following this note will make this project constructable.

Can you please clarify if we will be held to this while constructing the project.

The contractor shall conduct stream work—including embankment, grading, stabilization, and seeding/mulching—in a manner that leaves all disturbed areas in a stable condition at the end of each workday. Work should be sequenced to avoid leaving any portion of the stream exposed or vulnerable to erosion overnight. 6

Does the quality of void filled riprap (14,435 CY) on page two include the underwater fill and soil riprap?

Yes, the quantity of void-filled riprap shown on page two (14,435 CY) includes both the underwater fill and the soil riprap. 8

Can the Voil Filled Riprap be blended off site?

No. To ensure proper void filling and to verify that the correct rock gradation and content are achieved, this work should be performed on site. Blending off site could result in inconsistencies during placement and may not meet the project’s specifications for void content and structural integrity. On-site blending allows for better quality control and ensures compliance with the design intent. The blending needs to be verified and adjusted based on actual site conditions, which is difficult to control if blending is done off site. 8

Are the cross-section elevations on pages 12& 13 finished grade elevations?

On Sheets 12 and 13, the existing grade is shown in a dashed gray line and the proposed grade is shown in a solid black line. The elevations called out are for the proposed finished grade. 8