Questions_and_Answers_0003.pdf

Rehabilitation of the Engineering Officer’s Quarters Dry Tortugas NP Solicitation No: 140P5424R0019

NPS Responses to Questions

Copper

1. Please confirm no new downspouts are included in the SOW and that all new gutters will tie into existing downspouts/collector heads.

NPS Response: Missing one round copper rain leader (+/- 18’LF) located at the northeast corner of 8A shall be replaced in kind including all mounting hardware to match existing historically correct downspout. Contractor shall insure new downspout is replaced in kind of the same material, size, shape, profile, thickness etc. Contractor shall verify existing rain leaders (downspouts) are properly attached to building before work commences.

a. If new downspouts ARE required, please confirm style, size, material, and total LF to be included in pricing.

2. Please confirm number of existing downspouts that will need included on the 75 LF run noted on pg 5/16 of SOW.

NPS Response: A section of approx. 18’ of round copper rain leader with all appropriate metal hardware and accessories needs to be replaced at the northeast corner of 8A (downspouts).

3. The 40 LF run noted on pg 5/16 of SOW is assumed to be the photo shown on pg 10/16 (South Porch Unit 8A). Pls confirm repair will be limited to straightening gutter as best as possible and resecuring brackets. If further repairs are needed pls clarify.

NPS Response: A recent assessment of the existing damaged copper gutters has led to the conclusion that repair is not warranted. Approximately 100 L.F. of new copper rain gutters shall be installed to replace damaged gutters. New copper gutters shall be in kind to match existing. Wood carpentry/painting associated with the attachment of gutters will be included. New gutters and rain leaders shall be tested for proper slope, water drainage and leaks.

New Copper Gutters:

8A- Main Roof (+/- 31’-0” LF) Second Story Porch (+/- 20’-0” LF) First Story Porch (+/- 31’-0” LF) 8B- Main Roof (+/- 16’-0” LF)

TOTAL LF = 98’ LF

4. Please clarify that SOW statement “repair approximately 50 LF of copper ridge cap” refers to straightening and resecuring the ridge as best possible in needed locations. If further repair measures are required, pls clarify.

NPS Response: Inspection of the metal ridge cap (8A, Hyphen, 8B) by contractor to determine specific locations of repairs not to exceed 50 LF. Repairs refers to preserving, straightening, water proofing and resecuring the existing copper ridge cap to slate roof in required locations.

Care shall be taken while working on and adjacent to historic fabric.

Wood Carpentry

1. Please clarify specific locations on the buildings where wood carpentry repairs are required.

(For example, roof fascia and cornice along the lower porch roof.) If any further carpentry repairs are required, pls clarify location and extent of repair.

NPS Response: Wood Carpentry repairs shall be at areas of work necessary to reattach copper gutters to 8A/8B roof wood fascia and masonry cornice and along upper and lower porch roofs

(8A & 8B). Also included are minor non-structural dutchman type repairs to upper and lower wood columns and related architectural trim at porches. Repairs shall include minor dutchman type repairs to 2nd story porch balustrade, trim board, and handrail.

2. Please confirm carpentry repairs do not include framing.

NPS Response: Structural Framing repairs of exterior wood decks or porch roofs is not part of this scope.

a. If framing repairs ARE required, please confirm location and quantity of each type of repairs

Painting Repairs

1. Please clarify specific locations on the buildings where type and extent of painting repairs noted on pg 5/16 of SOW. If further repairs are required, please clarify location and extent of repair.

NPS Response: Wood Nailers, exterior porch wood molding and trim associated with the reinstallation of copper gutters shall be painted. All wood carpentry/dutchman repairs at wood columns and related architectural wood trim including repairs at 2nd story porch safeguard shall be painted.

2. Please clarify specific location and extent of painting repairs (LF and/or SF) noted on pg 5/16 in SOW.

a. If painting repairs ARE required, please confirm paint color is white (final shade to be selected by owner).

NPS Response: Final paint to match the existing white color. NPS to provide color code and type of finish.

Slate Roof Repairs

1. Please confirm the 100 sf of slate repair noted on pg 5/16 in SOW assumes random slate replacement throughout the roof system.

NPS Response: Main purpose of this undertaking is to prevent further damage caused by continued water intrusion. Before starting work, contractor shall inspect the roof for loose, damaged, dislodged slate roof tiles and damaged, bent detached copper flashing. Focus shall be at the parapet and chimney metal flashing and counterflashing conditions and the surrounding waterproofing underlayment. Copper metal flashing and its attachment shall be replaced in kind to match. Care shall be taken while working on and adjacent to historic fabric.

Please confirm if attic stock of slate for repair is available.

NPS Response: Slate roof tiles are available. There are approx. 250 slate tiles left over from previous roof repair. Slate roof tiles are palleted and stored in the Admin Area of Garden Key.

Please confirm if salvage slate to match existing is permitted or if only new slate is acceptable.

NPS Response: Care shall be taken to salvage existing slate roof tile for reuse. New Slate roofing tiles is not within scope of work.

BID ADDITIVE: Water intrusion at the 1st Floor Porch Roof at 8B has progressively worsened since Hurricane Ian and remedial repairs are not sensible. Reroof approx.

160 SQ. FT. (verify quantity) at 8B 1st Floor Porch Roof w/ NPS provided Slate Roof Tiles.

Mortar Repointing Repairs

1. Please clarify the locations and total LF of Mortar Repointing Repairs noted on pg. 5/16 in

SOW.

NPS Response: Primary area of concern – Repointing areas affected by Chimney and Parapet metal flashing repairs to prevent further water intrusion. Park cannot clarify exact locations of mortar repairs however it is anticipated that any repointing work should be concentrated to areas adjacent to repair work. Prior to commencement of mortar repointing, the NPS and contractor shall inspect chimney and vertical parapets for possible moisture intrusion due to mortar loss or metal flashing repairs and newly discovered flashing issues.

Site Mobilization/Demobilization/Debris Disposal

1. Please also confirm the frequency of required debris removal (Daily, weekly, monthly)

NPS Response: Movement of equipment, materials and debris between the mainland and Garden Key job site may utilize schedules of the National Park Service (NPS) Motor Vessel Fort Jefferson (MVFJ,) or by other means of contractor choice.

NPS Boat Usage

1. Please confirm if contractor will be permitted to utilize the MV Fort Jefferson to aid in transporting contractor supplies and equipment to and from the site.

a. IF YES, pls provide the following:

i. Confirmation that the MV Fort Jefferson is an inspected vessel and can carry commercial material and equipment for hire

ii. Port location and necessary information regarding port staging and delivery requirements

iii. Listing of days/times vessel will be provided and when the first last trip of the day departs

iv. Maximum number of passengers permitted

v. Cost, if any, to contractor per trip (one way/round)

vi. Details of maximum weight the contractor can place on the vessel

vii. Details of space or quantity restrictions for contractor to acknowledge.

viii. Details regarding any material that is not permitted on the vessel.

NPS Response: The available deck space on the MVFJ is: 29 ft long by 17 ft wide. MVFJ ship movements outbound generally occur every other week on Tuesday mornings.

Departures are approx. 1000 and arrival at job site is approx. 1500, after which unloading begins. Return trips to the mainland occur on the following Thursday morning departing 0700 and arriving mainland at approx. 1200, after which unloading begins. Mainland load days are dedicated to the Monday before departure starting at 0800. Job site load days are the Wednesday before departure commencing approx. 1500. Scheduled trips are usually 2 weeks apart with Tuesday outbound and Thursday inbound movements only.

Only pre-scheduled trips are available for beginning and ending mobilization purposes for this project. Ship cargo capacity is 30 long tons. All storage is on the ship’s open uncovered rear cargo deck. Contractor shall provide tarps or similar coverings if cargo should be weather protected.

With availability, park personnel will assist with material and contractor personnel transport. On the mainland this includes ship crane loading / unloading and NPS personnel support. At the job site this includes ship crane and forklift loading / unloading and NPS personnel support.

No matter how mobilization / demobilization is accomplished, a Material and Debris Movement Plan is required to explain contractor’s procedures and methods to successfully coordinate with the MVFJ for pre-determined load sizing, delivery, pickup, crating, and crate movement on the mainland and Garden Key. The plan shall include how records of debris taken from the job site are tracked to a specific debris disposal facility. No excess, unused, unneeded, or otherwise discarded material shall be dumped or disposed of improperly on the mainland or job site or remain at the job site when the project is completed.

The NPS encourages contractor efforts to promote and adhere to local recycling efforts of commodities to be removed from the jobsite and can be explained in their project response package. Malleable, ductile metals of market value are property of NPS. Scrap copper transfer can occur if a value is placed on a known agreed to quantity and credit is proposed during the line-item bid process.

Dedicated space for storing supplies and materials will be provided within 50 yards of the job site for large items and next to the job site for supply and materials use during the workday. Storage area is not covered and considered open sky. The area is closed to non-park employees with access for the contractor.

Loads into / out of Fort Jefferson itself via forklift are restricted to 8 feet or less horizontal unless the load can be maneuvered on the forklift thru the 8-foot limit while using the moat bridge (sallyport). Forklift load weight limit is 2500 pounds. Ship crane load weight limit is 2500 pounds.

Debris leaving the job site must be loaded by the contractor into pre-approved containers. Once unloaded on mainland by MVFJ, contractor is responsible for arranging delivery to the disposal facility.

Other Means of Contractor Choice

Loading and unloading must yield to the daily schedule of the 175-person capacity passenger ferry delivering visitors to the national park. Therefore, and if utilizing the main government dock on Garden Key, loading / unloading may not occur between 1000 and 1500 daily. Unloading may begin at 0700 and must cease by 2000 to preserve the tranquility of a nearby overnight campground.

No overnight mooring at government docks is allowed. Overnight mooring, if needed, can be offshore and within 1 nautical mile of Garden Key and anchoring location must avoid corals.

NPS will not provide mainland support for loading / unloading purposes. NPS will provide personnel and forklift for supply and material movement to the job site if desired once unloaded by contractor onto land at Garden Key.

Lodging and Scheduling

1. Please confirm if park lodging accommodations are available for a crew larger than 4.

a. If accommodations are available, please confirm if the same rate of

$45/person/night will apply.

2. Please confirm if the contractor crew will be guaranteed housing in NPS quarters (for crew of 4 and/or larger).

3. Current solicitation design this project to complete July to Oct according to our understanding, other project active that will tie up all crew lodging. Will the time frame be adjusted or will other arrangements be made for crew lodging.

NPS Response: Housing is available at the job site in the unit undergoing external renovations. Interior conditions are not affected by external repairs. Availability is for 6 occupants maximum in 2 bedrooms in a bunk setting, twin beds. Provisions are similar to furnished, shared, living space on the mainland: potable water, 110 / 208vac service, 2 bedrooms, shower/ sink/ toilet, operational kitchen (refrigeration, microwave, gas range/stove), HVAC. Cost is $45 per person per night, cost is returned to contractor by including a line item for housing on bid sheet. Unit will be available from start of the work through completion of the job. Contractor is responsible for providing own linens, towels, soaps. Toilet paper provided.

General Questions

1. Please provide drawing/sketch of any areas of the park that are restricted access for crew (whether during or outside of regular work hours).

2. Please clarify approved working hours as well as whether work is permitted on weekends and/or federal holidays.

a. Please confirm if set up and clean-up can occur prior to/immediately following the approved work hours.

3. Please confirm the classification of trees located near the areas of work including any perceived historical value and/or limitations for the trimming of trees adjacent to work areas.

NPS Response: Closed Areas - this topic is reviewed at the NPS-led orientation meeting with selected contractor on island prior to start of work.

Work Hours - Garden Key work hours are between 7am - 7pm including daily prep and close down activities. Weekend and holiday work is permitted at no extra cost to the government.

Trees - necessary tree trimming shall be performed be in a professional manner using techniques generally accepted by the horticultural / arborist trades. The work shall respect and adhere to general principles of working on a recognized cultural landscape. Results shall compliment the viewshed. Trees to be repaired on this project are on a cultural landscape but are not individually historically significant. The candidate species for trimming is Sea Grape (Coccoloba uvifera), a fast-growing evergreen native to the area. A Cultural Landscape Report guides landscape repairs surrounding the job site and is referenced in the solicitation package. Individual branch removal shall be approved prior to by NPS. Trimmed branches greater than 3 inches shall be part of other construction debris removed from the island.