Attachment_6_-_Questions_and_Anwers_0002.pdf

United States Department of the Interior Bureau of Land Management

Gunnison Gorge National Conservation Area Recreation Site Improvements

Pre-Bid Questions and Answers sam.gov/

Notice ID: 140L5422Q0001

Q: Are there CADD files for the project?

A: Yes, CADD files will be provided after project award.

Q: Can Cottonwood Grove campground be closed during construction?

A: No, the campground will remain open. The contractor can close portions of the campground as work requires.

Q: Can steel pipe be substituted for the wood bollards at Cottonwood Grove campground?

A: No.

Q: Do the pressure treated wood bollards at Cottonwood Grove campground need to be sealed after they are cut?

A: No. The cut surfaces do not need additional sealant or treatment.

Q: Can the fence to be removed, at Cottonwood Grove campground, be burned on site?

A: No.

Q: What is the cut-off date for questions?

A: December 13, 2021.

Q: Parking stops are noted to be installed ‘flush’ with the aggregate surface. Does that mean buried so that the top of stop is flush with the aggregate surface?

A: No, the parking stop does not need to be buried into the aggregate. The bottom surface of the parking stop shall be flush with the top surface of the aggregate.

Q: For the trailer parking delineators require any ‘ballast’ (concrete, gravel, etc.) prior to being welded and installed in place?

A: No, the inside of the steel pipe may be hollow.

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Gunnison Gorge National Conservation Area Recreation Site Improvements

Pre-Bid Questions and Answers

Q: At the Gunnison Forks site where the disposal area is indicated, are resultant materials from clearing and grubbing as well as excess materials to be bermed or is the material just to be spread across the surface? Any erosion control required at this area?

A: The excess material shall be bermed. Erosion control is not required.

Q: The bid schedule calls for 63 cy of imported fill and I have not found any specifications for that material under the project specifications. Is there a certain type of material that will be needed for this item?

A: See section 31 00 00, paragraph 3.5 for further clarification.

Imported fill material shall be any material classified by ASTM D2487 as GW, GP, GM, GP-GM, GW-GM, GC, GP-GC, GM-GC, SW, SP, SM, SC, ML, CL, MH. And comprise stones less than 3 inches in any dimension. Organic soils, and highly plastic, fat clay soils are not acceptable.

Q: Local material suppliers have noted that they do not have a material that meets the specified #357 stone requirement and have requested that 1 ½” crushed be allowed to be substituted.

Does the Government consider this acceptable?

A: See attached clarification drawings for locations.

The subbase at locations “A” may be substituted with a gradation similar to a Number 3, 4, 467, or 57 stone from table 703-1 of the Colorado Department of Transportation, 2019 Standard Specifications. The alternative subbase shall be well graded and have 0-5% passing the #8 sieve.

The subbase at locations “B” may be substituted with any crushed stone aggregate with a top size of 5 inches. “Pit run” aggregate may also be used and shall have a stone top size of 5 inches.

Alternative gradations for the aggregate base course will not be accepted.