Attach 5 Contractor Questions and Answers_0002.pdf

Theodore Roosevelt National Park Sewer Replacement

Site Visit Questions & Answers Amendment 0002

1. On the print it shows the entire street to be removed from curb to curb? Can a 14' strip, (or the portion needed for excavation) be milled off and reuse millings as base? Our understanding is that the entire roadway is to be reconstructed the following season.

Government Answer: It was assumed that efficiency and contractor preference would be to remove the entire road. The entire road is to be replaced in a future project. For this effort, the contractor may remove only necessary portions to complete the work provided the temporary asphalt installed provides a uniform surface matching flush to the existing that remains and the entire roadway is returned to paved surface in accordance with the scope of work of the project.

2. The plan shows Class 5 base, Can the Class 5 just be utilized in excavation trench?

Government Answer: The Class 5 base aggregate is to be placed within sewer excavation trenches and where noted on construction drawings detail 2/C16 and referenced in specification section 32 12 16, part 3.1 B which additionally references State Specifications for asphalt paving base course.

3. The plan shows 3/4" clean rock bedding on the pipe. Is that for all pipe or just main line? Rock is very high priced in western North Dakota.

Government Answer: The rock bedding on all pipe shall be required and meet specification section 31 23 33, part 2.1.

4. The plans state that one lane of traffic is to be open, which is a safety concern. The road is far too narrow for our excavation and traffic. Would it be acceptable to close the road during the day, back fill at the end of the day, and open the road up at night? The work would be completed block by block with this approach.

Government Answer: Yes, this proposed approach is acceptable.

5. Who takes care of surveying?

Government Answer: The contractor is responsible for all surveying required.

6. The line from the visitor’s center to MH #1 is currently 6", can that line be fiberglass lined? Which would eliminate concrete and asphalt removal and traffic rerouting.

Government Answer: The 6” new PVC sewer line from Visitor Center to MH #1 shall be as per construction documents.

7. MH #1 to the lift, pipe size?

Government Answer: Construction drawings sheets C4, C5, C11 note connect existing 10” to sewer.

8. MH #9 to the lift, pipe size?

Theodore Roosevelt National Park Sewer Replacement

Site Visit Questions & Answers Amendment 0002

Government Answer: Construction drawings sheets C4, C5, C11 note new 10” to wet well (lift).

9. On the manholes it calls for them to be epoxy coated, and pressure tested, is that correct? We generally never test sewer mains and manholes, usually they are flushed and televised. If so, the coating is no longer done at the plant and would need to be done on sight.

Government Answer: Specification section 33 31 11, part 3.6 F shall govern. States a vacuum (negative pressure) test and notes conducting prior to applying epoxy and backfilling which affirms question that coating is done on site rather than at manufacturing plant.

10. As far as GPS locations on the sewer wye's, is that to be done by the contractor?

Government Answer: The contractor shall provide (obtain) GPS coordinates at all direction and elevation changes per specifications section 31 23 33, part 3.6. B.