Site Visit Questions_0002.pdf

1. Please address the compaction requirement from section 1.2.B of the General

Requirements. 99% compaction is virtually impossible to achieve, a 95% density as measured by proctor is the standard for subgrade compaction.

Government Answer: Range can be 95% to 99& compaction for base coarse.

2. Please address the removal limits as shown on pages 66-70 of the solicitation. As a practical matter, leaving a small strip of concrete near the asphalt impedes the ability to remove and over excavate the area. Additionally, there is a discrepancy between the pictures showing the red outline and the plan showing the red outline regarding the removal limits nearest the asphalt.

Government Answer: Tearing out the remaining 517 sf feet of concrete would be the best value to the government, since existing concrete that would remain has a potential to rise above the new concrete and create tripping hazards later. This would provide contractors with the best method while pouring new concrete, since it will all be the same on top of compacted base coarse and mitigate the possible lifting of the existing concrete that could cause a tripping hazard.

3. #4 rebar at 12” on center is excessive for a sidewalk. For cost purposes the Government could achieve similar performance, with a reduced cost by installing rebar at 24” on center.

Government Answer: As a cost saving measure, that can be incorporated into the removal of additional 517 sf of concrete, rebar spacing of 24 inches on center is acceptable for rebar layout.

4. Will the government accept non limestone ¾” minus aggregate? The nearest gravel pit is in Phillip, and they do not have limestone. Limestone would have to be trucked from Rapid City.

Government Answer: Unwashed Red limestone aggregate is the preferred base course for compaction based on the fines associated with the material, compared to the bank run aggregate out of Philip, SD that is river gravel and sand mixture. Trucking is available from Simons, Pete Lien and Sons or Roth Trucking out of Rapid City, SD at a reasonable cost.

5. The south end of the concrete slab by the refuse container, specifies dowelled in rebar to existing concrete slab.

Government Answer – rebar dowel into existing concrete by refuse can/could lead to possible lifting of existing slab or breaking the concrete where rebar was doweled into the concrete. Use expansion joint material between the existing and new concrete, apply a caulking sealant over the top of the expansion joint.

6. A small portion of concrete is to remain (517 sf) but makes it harder to protect can could damage while tearing out the remaining concrete around the vault toilet. To make things easier and not have existing concrete raise once new concrete is poured is to tear out the entire concrete around the vault toilet and install all new with one pour.

Government Answer: Tearing out the remaining 517 sf feet of concrete would be the best value to the government, since existing concrete that would remain has a potential to rise above the new concrete and create tripping hazards later. This would provide contractors with the best method while pouring new concrete, since it will all be the same on top of compacted base coarse and mitigate the possible lifting of the existing concrete that could cause a tripping hazard.

7. If damage to existing vegetation happens?

Government Answer: 5.12 Site Restoration of SOW

8. Can vault toilet be closed and fenced off during construction operations.

Government Answer: Yes, the vault toilet can be closed during construction operations since this is a short-term closure and project.