Sol_140P5126Q0050_Amd_0001.pdf

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 or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by 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.

E. IMPORTANT: is not is required copies to the issuing office.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE

2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable)

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

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. is extended. is not extended.

12. ACCOUNTING AND APPROPRIATION DATA (If required) copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

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

IT MODIFIES THE CONTRACT/ORDER NUMBER 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

NUMBER 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)

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

15C. DATE SIGNED

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

16C. DATE SIGNED

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

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

PAGE

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

Previous edition unusable

PAGESOF

Contractor

The hour and date specified for receipt of Offers to sign this document and return

Edward Dingle

See continuation page

NPS SER EAST MABO

100 Alabama St., SW 1924 Building Atlanta GA 30303-8701

NPS SER EAST MABO

100 Alabama St., SW 1924 Building Atlanta GA 30303-8701

PSE

PSE

140P5126Q0050

08/07/2026

07/22/2026

1 12

CONTINUATION SHEET

REFERENCE NO. OF DOCUMENT BEING CONTINUED PAGES

NAME OF OFFEROR OR CONTRACTOR

SUPPLIES/SERVICES

(B)

UNIT

(D)

UNIT PRICE

(E)

AMOUNT

(F)

OPTIONAL FORM 336 (4-86)

Sponsored by GSA FAR (48 CFR) 53.110

ITEM NO.

(A)

QUANTITY

(C)

NSN 7540-01-152-8067

140P5126Q0050/0001

The purpose of this amendment is to provide responses to questions received in response to the solicitation and extend the due date for receipt of quotes.

Questions and answers are provided as attachment 0006.

The due date for receipt of quotes is extended through August 17, 2026, 1:00pm Eastern Time.

Period of Performance: 08/17/2026 to

09/30/2026

Amendment 0001; Attachment 0006 RFQ # 140P5126Q0050

Hazardous Tree Removal

Mammoth Cave National Park

Solicitation #140P5126Q0050

Questions and Answers

Question 1. Incumbent Contractor Information

Is there an incumbent contractor currently performing this requirement? If so, may you please provide the contractor's name, current contract number, and the current/most-recently-awarded contract value and period of performance? (This information may also be available via USAspending or FOIA if direct disclosure is not possible.)

Answer: This is a new requirement, no incumbent.

Question 2. Discrepancy in Contract Performance Period

Section 3-1 of the SOW states "The contract period will extend from January 20, 2026, to May 31, 2026," and Section 3-2 states "The felling of trees will be limited to the period between November 15, 2026, to March 31, 2026." These dates appear inconsistent (January–May 2026 vs. November 2026–March 2026). Please clarify the correct contract performance period and the correct tree-felling window.

Answer: The period of performance will take place from November 15, 2026, to March 31, 2027. This is timeframe for limbing and felling trees in the park to interfere with bat roosting cycles.

Question 3. Award Basis — Aggregate vs. Line-Item

Will the Government award the contract as a single aggregate price (all 50 bid items), or may individual line items be accepted or rejected? Must the award include both base bid items (01–38) and option items (01–12), or can the Government select a subset?

Answer: Request for quote 140P5126Q0050 Attachment 0003 – Price Sheet must be completed in its entirety.

Question 4. Roadside Trimming (Line Item 00010) Scope Ambiguity

Line Item 00010 in the RFQ schedule describes "Removal of Overgrowth of Vegetation from Roadsides" (roadside trimming on six roads), whereas the bulk of the price schedule addresses individual tree removal/felling by item number. Are these two separate deliverables, or does Line Item 00010 roll up to include the individual tree removals and roadside vegetation work as one combined scope?

Answer: The scope of this contract is to remove the trees specifically called out in the SOW, via the requirements set forth in the scope.

Question 5. Was there a previous incumbent? If so, can you share their price proposal?

Answer: Please see response to question number one.

Question 6. Have there been any changes to the scope since the last?

Answer: The following changes were made from the previous scope:

1. All tree materials need to be removed from the park (instead of leaving in the woods), and;

2. The flagging operations for tree road work near roads need to be considered and is expected.

Question 7. Did the previous incumbent complete the project term? Is this solicitation the same length of time?

Answer: Please see response to question number one.

Question 8. If previous incumbents exist, when is the contract set to end?

Answer: Please see response to question number one.

Question 9. Is there a set budget for this solicitation?

Answer: The estimate for this project is less than $100,000.00.

Question 10. Is there a projected award and start date?

Answer: Anticipated award timeframe of August 17-21, 2026. See response to question number two for performance start date.

Question 11. Attachment 0005 reads:

"TIME: 09:00am. (CT) DATE: Wednesday, August 05, 2026."

The solicitation reads:

"A site is scheduled for August 05, 2026, 09:00am Eastern Daylight Time (EDT)."

Those are an hour apart for the same inspection. Which governs? I ask because the announcement states that no individual site inspections will be offered, so a representative who reads it the wrong way has no second opportunity.

Answer: The site visit will be at Central Time

Question 12. "Quotes are due no later than August 14, 2026, 1:00pm Eastern Standard Time" and in the following sentence:

"...no later than August 14, 2026, 1:00pm EDT"

Eastern Standard and Eastern Daylight are an hour apart in August.

Answer: Quotes will be due in Eastern Daylight Time.

Question 13. Work hours and weather-related delays: If additional work time is needed before 8:00

AM or after 5:00 PM, what is the procedure for requesting approval from the COR? Please also confirm how requests for additional time should be handled when weather delays affect the work schedule.

Answer: Requests to perform work outside the established work hours of Monday through Friday, 8:00 AM to 5:00 PM, shall be submitted by email to the COR, with the Contracting Officer copied, a minimum of 48 hours in advance. The request shall identify the proposed date(s), work hours, location(s), tree number(s)/bid item(s), and the work activities proposed during the extended hours.

Work outside the established hours shall not proceed without Government approval. The contract performance period is intended to account for normal weather-related delays. The Contractor shall manage its schedule accordingly.

Question 14. Certified payroll requirements: We understand that employees must be paid no less than the applicable prevailing-wage rates. Please confirm whether certified payroll reports will be required for this project and, if so, what documentation and submission frequency will apply.

Answer: Yes, certified payroll reports will be required monthly for this project. Contractors and subcontractors must comply with all applicable prevailing-wage requirements and maintain documentation demonstrating that employees are paid no less than the required wage and fringe-benefit rates.

Certified payroll reports should identify each employee’s classification, hours worked, applicable wage rate, fringe benefits, gross wages, deductions, and net wages, along with the required certification or statement of compliance. Reports must be submitted weekly for each week in which covered work is performed, unless otherwise directed in the contract documents or by the administering agency.

All contractors and subcontractors are responsible for maintaining supporting payroll records and providing additional documentation upon request to verify compliance with applicable prevailing-wage requirements.

Question 15. Chemical-spill procedures: Does Mammoth Cave National Park have a specific cleanup, notification, and reporting procedure in the event of a hydraulic-fluid, fuel, or other chemical spill? Please provide any required emergency contacts or park-specific procedures

Answer: In the event of a fuel, hydraulic-fluid, oil, or other chemical spill, the Contractor shall immediately stop the source of the release when it can be done safely, protect personnel and the public, and take immediate action to contain the spill and prevent migration into soil, drainage features, waterways, caves, or other sensitive resources. The Contractor's site supervisor shall immediately notify the COR following initial containment and shall follow any additional notification or response direction provided by the Government. The Contractor shall include spill prevention, containment, response procedures, required spill-response materials, responsible personnel, and emergency communications procedures in the project Safety Plan. The Contractor remains responsible for compliance with applicable federal, state, and local spill reporting, cleanup, and disposal requirements.

Question 16. Daily safety meetings: Our team plans to conduct daily safety meetings to review the planned work, hazards, and required precautions. Is a park representative required to attend, or may the team conduct and document these meetings??

Answer: NPS personnel are not required to attend the Contractor's daily safety meetings. The Contractor may conduct and document these meetings independently. Daily safety meetings are acceptable and may supplement the kickoff and weekly Contractor tailgate safety meetings identified in the SOW. The Contractor remains responsible for communicating daily work activities, hazards, traffic-control requirements, changes in site conditions, and required safety precautions to its employees and subcontractors.

Question 17. Incidental vegetation removal: Smaller nontarget saplings, bushes, or vegetation may need to be removed to safely access and complete the designated work. May this incidental removal be approved by the COR in advance or in the field, and would approved removal be exempt from the restoration requirements applicable to unauthorized damage?

Answer: The Contractor shall make all reasonable efforts to avoid disturbing or removing vegetation that is not specifically identified for removal under the SOW. Removal, cutting, or damage to non-target trees, saplings, shrubs, or other vegetation is not authorized without prior approval from the COR. If the Contractor determines that disturbance or removal of non-target vegetation is necessary to safely perform the work, the site supervisor shall stop the affected activity and contact the COR for an on-site evaluation before proceeding. The COR will evaluate the specific condition and determine whether the proposed vegetation disturbance may proceed. Any restoration requirements associated with an approved disturbance will be determined based on the location, type, size, and extent of the disturbance. Government approval to remove or disturb vegetation does not automatically waive applicable site-restoration requirements.

Question 18. Off-site disposal on private property: All removed debris is expected to be transported to private property for lawful disposal or processing. Must the waste-disposal plan identify the property address and owner, and what documentation will be required as proof of lawful disposal?

Answer: The Waste Disposal Plan shall identify the proposed disposal or processing location and describe the type of facility or property where the material will be transported. Identification of the property owner is not required as part of the initial Waste Disposal Plan unless otherwise requested by the Contracting Officer or COR. The Contractor remains responsible for ensuring that the selected location is legally authorized to receive and/or process the material. In accordance with Section 3-7, the Contractor shall provide proof that waste materials were legally disposed of in accordance with the submitted and approved Waste Disposal Plan. Acceptable documentation may include disposal receipts, weight tickets, facility receipts, or other documentation sufficient to demonstrate lawful disposition of the material.

Question 19. Identification and logos: Are there any specific identification, vehicle-marking, or badging requirements for personnel, vehicles, equipment, or safety apparel while working within the park?

Answer: No project-specific NPS logos, uniforms, vehicle markings, or personnel badging are required by the SOW. Contractor personnel shall not represent themselves as National Park Service employees.

Personnel exposed to vehicular traffic shall wear appropriate high-visibility safety apparel consistent with the Contractor's approved Safety Plan and traffic-control/flagging requirements. Prior to mobilization, the Contractor shall provide the COR with the anticipated number and general description of contractor vehicles and major equipment that will be operating within the project areas so appropriate park personnel can be informed of their presence.

Question 20. Tree-climbing operations: May qualified tree climbers perform controlled sectional removal and block trees down where appropriate, or must all aerial work be completed from bucket trucks or other aerial lifts? Please identify any required qualifications, certifications, or submittals.

Answer: The SOW does not prescribe a single means or method for accomplishing tree removal. The Contractor is responsible for selecting appropriate means, methods, equipment, and qualified personnel necessary to safely perform the work. Qualified tree climbers may be used for controlled sectional removal where the Contractor determines climbing is an appropriate means and method. If climbing operations are proposed, the Contractor shall address those operations specifically in its Safety Plan, including climbing procedures, fall protection, rigging, rescue procedures, exclusion zones, communication, personnel qualifications, and protection of visitors, employees, property, and surrounding natural resources. Use of climbing operations does not authorize the Contractor to remove or damage non-target vegetation. Any proposed disturbance to vegetation not identified for removal requires prior COR approval in accordance with Section 1-15.

Question 21. Overnight staging of traffic-control devices: May cones, signs, and other traffic-control equipment be safely staged along the road shoulder at the end of each workday, or must all traffic-control devices be completely removed daily?

Answer: Traffic-control devices that are not required for an active condition shall not be left deployed in a manner that provides incorrect or misleading information to motorists. Temporary traffic-control equipment may be stored overnight only in a location approved or designated by the COR and shall be positioned so that it does not obstruct travel lanes, shoulders required for safe roadway operation, visitor access, drainage, or emergency access. The Contractor is responsible for the security of equipment stored in Government-designated storage areas. Traffic-control devices required to protect an existing hazard or continuing work-zone condition shall remain in place as necessary to maintain public safety.

Question 22. Emergency communications: Cellular service is limited in portions of the park. Does the park have an emergency radio or communication system available for contractor use, or should the contractor provide an independent system such as satellite-based communications?

Answer: The Government will not provide radios, satellite devices, or other communications equipment for Contractor use. The Contractor is responsible for providing a reliable means of communication appropriate for the project locations and anticipated cellular-service limitations. The Contractor's Safety Plan shall identify the proposed communication methods and procedures for contacting emergency services, Contractor supervision, and Government personnel during an emergency. The Contractor shall ensure that an effective means of emergency communication is available to personnel while work is being performed.

Question 23. Work-zone enforcement: What support will park law enforcement provide when motorists disregard flaggers, enter controlled work areas, or fail to comply with work-zone speed restrictions?

Answer: The Contractor remains responsible for establishing and maintaining the traffic-control, flagging, barricades, and work-zone protection necessary to safely perform the work. Routine law-enforcement presence or dedicated traffic enforcement should not be assumed or incorporated into the Contractor's means and methods. If a motorist or other individual disregards traffic controls, enters a restricted work area, or otherwise creates an unsafe condition, the Contractor shall suspend affected operations as necessary to protect personnel and the public and notify the COR. Illegal or dangerous activity may also be reported to the appropriate law-enforcement authority. Emergency law-enforcement response will be based on the circumstances and availability of personnel.

Question 24. Cameras for safety documentation: May we operate cameras within the work zone for crew safety and liability documentation? Please identify any applicable restrictions or approval requirements.

Answer: Additional information is required before the Government can respond. Please clarify the proposed camera use, including:

• Whether the equipment will be fixed, vehicle-mounted, body-worn, handheld, or otherwise configured;

• Whether recording will be continuous or limited to specific tree-removal operations;

• Whether the system will record audio;

• Whether footage will be live-streamed or transmitted off-site;

• Whether the camera is intended solely for internal safety/liability documentation or for another purpose; and

• How recorded images or videos involving park visitors, NPS employees, facilities, or other contractors are intended to be used, stored, or distributed.

Upon receiving this information, the Government will determine whether any project-specific restrictions or approvals apply.

Question 25. All designated trees, vegetation, and resulting debris must be completely removed from park property.

Answer: Yes. All vegetative material generated by removal of the designated trees, including felled trees, logs, limbs, branches, and wood debris, shall be removed from NPS property and lawfully disposed of off-site in accordance with Section 1-12.

Question 26. Material may not be felled into wooded areas and left to decompose.

Answer: Correct. Material generated by the tree-removal work shall not be left within the park to naturally decompose. Section 1-12 requires complete removal from NPS property and off-site disposal.

Question 27. A substantial portion of the work will require aerial removal due to proximity to active roadways.

Answer: The Government does not prescribe aerial removal as the required means and method.

Several designated trees are located adjacent to active roadways and other park facilities, and the Contractor shall select the equipment and removal methods necessary to safely perform the work while complying with the SOW's safety, flagging, barricade, visitor-protection, and natural-resource protection requirements.

Question 28. Three trees within two work zones are expected to require crane-assisted removal.

Answer: The Government does not prescribe crane-assisted removal for specific trees. The Contractor is responsible for determining the appropriate means, methods, equipment, rigging, and personnel necessary to safely remove each designated tree based on existing conditions and the requirements of the SOW.

Question 29. The contractor is responsible for traffic control and work-zone protection throughout performance.

Answer: Yes. The Contractor is responsible for providing and maintaining the traffic-control, flagging, barricades, temporary controls, personnel, and other work-zone protection necessary to safely perform the work. The required Safety Plan must include a robust flagging plan for felling and limbing activities around active roadways.

Question 30. 1. Which debris removal language should be adhered to, contract states two ways of debris removal/leaving it. COR on site, stated hauling all off site. Need clarification.

Page 5, 1-12 DISPOSAL: The preference should be to fell into the woods and be left to naturally degrade. If felled into the road corridor then removed from park and shall become the contractor's property. It shall be disposed in accordance with current laws, regulations, and policies. Disposal of materials within the park is not allowed.

Page 4, 1-10 WORK AREA CLEANLINESS: Keep the storage area and work site clean. If directed by the COR, clear the site of all debris and litter. Dispose in a legal manner. Do not dispose.

Answer: All felled trees, logs, limbs, branches, wood debris, and other vegetative material generated by the work shall be completely removed from National Park Service property and lawfully disposed of off site. Section 1-12, DISPOSAL, of the current SOW governs this requirement. Stockpiling, burying, burning, chipping for disposal, dumping, or otherwise disposing of tree-removal debris within park boundaries is prohibited unless specifically authorized in writing by the Contracting Officer (CO) or Contracting Officer’s Representative (COR). Any previous language indicating that felled material may be left within wooded areas to naturally degrade is superseded and does not apply to this solicitation. The Contractor shall include all loading, hauling, transportation, disposal/tipping fees, and other associated costs in its proposed price.

Question 31. COR on site stated staging area was accessible during normal working hours with an unlocked gate, would the contractor be allowed to stage and process debris on staging area site for efficient debris management? What is the specific location of staging area?

Answer: Yes. The designated staging area is the Wondering Woods area, which consists of a large parking area. The Contractor may temporarily stage and process tree material at this location to facilitate loading and off-site removal, subject to coordination with the COR. The staging area will be shared with contractors performing other projects. The Contractor shall coordinate its operations accordingly and shall not obstruct access or interfere with other contractors, NPS operations, emergency access, or visitor activities. Temporary processing or staging at this location does not constitute final disposal. All tree material and debris associated with this contract shall ultimately be removed from NPS property in accordance with Section 1-12. The Contractor shall maintain the staging area in a clean and orderly condition and remove all project-generated debris upon completion of the work.

Question 32. On Page 5, 1-15, contract states PRESERVATION OF NATURAL FEATURES:

Tree stumps should be hashed so that they rot away faster. Confine all operations to work limits of the project. Prevent damage to natural surroundings. Restore damaged areas, repair or replacing damaged trees and plants, at no additional expense to the Government. Do not remove, injure, or destroy trees or other plants without prior approval of the COR.

On Page 5, 3-4 All removed trees will be flush cut. This is defined as within 12" off the ground surface.

The COR stated, Stumps to be cut flush to ground, would we need to hash stumps at 12” above ground or do we cut flush to ground and not hash them?

Answer: The Contractor shall comply with both requirements. All designated trees shall be flush cut as defined by Section 3-4 of the SOW, meaning the remaining stump shall be no more than 12 inches above the surrounding ground surface. The remaining stump shall also be hashed in accordance with Section 1-15 to facilitate natural decay. For clarification, the Government personnel conducting the site visit were not acting as the COR for purposes of modifying the contract requirements. Information communicated orally during the site visit does not modify the solicitation or SOW. The written solicitation documents, including subsequent written amendments and Government responses issued by the Contracting Officer, govern the work.

Question 33. Would like clarification, parts of the contract mention grubbing stumps and trimming work, is the only scope of work bidding Part 1: General, 1-1?

Answer: Yes. The trees specifically identified in Part 1, Section 1-1, DESCRIPTION, constitute the tree-removal work under this solicitation. Trees 1 through 38 are identified as Base Bid items, and Trees 39 through 50 are identified as Bid Option items. The designated trees are to be removed in accordance with the SOW. Stump grubbing is not required unless specifically identified elsewhere as an awarded requirement. Stumps associated with the designated tree removals shall be flush cut and hashed as specified in Sections 3-4 and 1-15. References to general vegetation trimming, grubbing, or other work that are not associated with the designated tree-removal requirements of Section 1-1 do not expand the tree-removal quantities identified in the bid schedule.

Question 34. Do trucks need to be washed before entering and leaving sites?

Answer: Yes. Vehicles and equipment used for off-road or vegetation-related operations shall arrive at the project area clean and free of visible soil, mud, seeds, plant material, and other debris that could transport invasive species into Mammoth Cave National Park. The primary requirement is that equipment be cleaned before entering and beginning work within the project area. Equipment shall be inspected and cleaned as necessary before mobilization between work areas when conditions present a risk of transporting invasive plant material, soil, pests, or pathogens. Cleaning shall be performed at an appropriate location and in a manner that prevents contaminated water, soil, seeds, vegetation, oils, fuels, or other material from being discharged into park resources, drainage systems, waterways, or sensitive areas.

Question 35. 6. Barrier criteria, on page 10, 1-20 TEMPORARY CONTROLS: The Contractor is responsible for the installation of all barriers, as directed by the COR. What is the specs of barriers? Are cones sufficient?

Answer: Type III barricades shall be used where barricades are required for roadway closures or to prevent traffic from entering a closed portion of the work area. Type III barricades generally consist of three horizontal retroreflective rails mounted on suitable supports and shall be designed, constructed, and installed in accordance with the applicable requirements of the current MUTCD. Barricades shall be of sufficient size, stability, and visibility for the roadway and work-zone conditions and shall be maintained in an upright, serviceable condition throughout their use. Traffic cones or other approved channelizing devices may be used for delineation and traffic guidance where appropriate; however, cones alone shall not be considered a substitute for Type III barricades where a roadway or portion of a roadway is closed to traffic. The Contractor remains responsible for providing all traffic-control devices, advance-warning signs, flaggers, and other temporary controls necessary to safely perform the work in accordance with the approved Safety Plan and flagging plan.

Question 36. On the wage determination pages, Is this contract subject to Executive Order 13706?

Answer: Yes.

Question 37. Page 8, Part 3, 3-1, Contract states contract period between November 15, 2026- May 31, 2026. Was this supposed to have an end date of the contract to May 31, 2027?

Answer: Please see response to question number two.

Question 38. Can we get clarification on the maximum amount of time traffic could be halted?

Answer: The SOW does not establish a fixed maximum duration for temporary traffic stoppages.

Traffic shall be maintained to the maximum extent practicable, and temporary stoppages shall be limited to the minimum duration necessary to safely perform tree-felling, limbing, rigging, loading, and related operations. The Contractor's Safety Plan and flagging/traffic-control plan shall identify the proposed means and methods for controlling traffic during work adjacent to active roadways. Planned operations requiring temporary full closure or significant interruption of traffic shall be coordinated with the COR in advance. The Contractor shall provide the minimum two-day notice required by Section 3-3 so the Park can make necessary operational adjustments and protect visitors. Emergency vehicles shall be provided with access through or around the work area as soon as conditions can be made safe.

Question 39. Will contractors be allowed to block one lane of traffic, with traffic control diverting traffic to one lane?

Answer: Yes. Temporary closure of one travel lane may be permitted when necessary to safely perform the work, provided traffic is maintained through the remaining lane using an approved temporary traffic-control/flagging arrangement. The Contractor shall incorporate the proposed lane-control method into its Safety Plan and robust flagging plan required by Section 1-3. Traffic in opposing directions shall be coordinated by qualified flaggers or another appropriate traffic-control method. Traffic-control devices, flagger stations, advance-warning signs, and high-visibility apparel shall be appropriate for the roadway conditions and work being performed. The Contractor shall coordinate planned lane restrictions with the COR in advance and shall conduct operations to minimize inconvenience to park visitors and staff. Full roadway closures shall not be implemented without prior Government coordination/approval except when immediately necessary to protect life or property.

Question 40. Attachment 0003 lists the tree species and sizes, while Part 1 of the Statement of Work appears to identify trees 1 through 50 for removal.?

Answer: Correct. Section 1-1 of the Statement of Work identifies the individual hazardous trees included in this procurement. Trees 1 through 38 are identified as Base Bid items, and Trees 39 through 50 are identified as Bid Option items. The species, approximate DBH, and geographic coordinates provided in the SOW are intended to identify the trees associated with each bid item.

Question 41. Please confirm whether there is any additional attachment, tree detail sheet, or scope sheet associated with these items that should have been included with the solicitation.?

Answer: No additional tree details or scope sheet is required to identify the trees included in the work.

The applicable trees are identified in Section 1-1 of the SOW by bid item, species/description, latitude, longitude, and DBH. Part 5 of the SOW additionally provides tree-location maps for Cave City Road, Mammoth Cave Parkway, and the Operations Area (Maintenance Road). Offerors are responsible for reviewing the solicitation documents and site conditions when developing their proposed means, methods, equipment, and pricing.

Question 42. Additionally, please confirm that all trees listed as items 1 through 50 are intended for complete removal rather than pruning or trimming?

Answer: Yes. All trees identified in Section 1-1 are designated for complete tree removal, not pruning or trimming. Trees 1 through 38 constitute the Base Bid, and Trees 39 through 50 constitute Bid Options that will be performed only if awarded/exercised by the Government. For each awarded tree, the Contractor is responsible for felling/removal and disposal in accordance with the SOW. Section 3-4 requires removed trees to be flush cut, defined as within 12 inches of the ground surface. Section 1-15 additionally requires the remaining stump to be hashed to facilitate decay. All felled trees, logs, limbs, branches, wood debris, and other vegetative material generated by the work shall be removed from NPS property and lawfully disposed of off-site in accordance with Section 1-12.

Sponsored by GSA FAR (48 CFR) 53.110