Vinton_QA_2017-03-30_.pdf

Vinton School Road and Campbell Hill Road Resurfacing “Questions and Answers from Industry”

As of 31 March 2017

Questions:

1. Would the Owner consider delaying the opening of this project 30 minutes, to 1500 on 19 April, 2017?

This would allow a potential bidder to re-assess his position pending the outcome of the Trooper Drive job bidding at 1400

Answer: No, Bidders shall provide their best final pricing with their bids prior to bid opening.

2. Please elaborate on the situation at the 4 corners gate, and will we be able to travel freely through this control point.

Answer: Assume worst case, no access through the gate.

3. There are existing tank crossings on Vinton School Road that will not be removed and replaced. The top of these crossings will be 5 inches lower than the crown grade of the new pavement. Please advise on how you would like us to transition into these wearing surfaces.

Answer: Any concrete surfaces that are not being replaced shall follow the table on KDOT std. sht. RD 051 attached to the Vinton plan set.

4. Will you allow the use of asphalt millings in lieu of base rock for backfill of cross road pipes, and the

RCB?

Answer: Amendment to the plans sheet typicals will be issued to address question.

5. Please elaborate on how you want a contractor to handle the deep cracking of the existing roadway, prevalent on the Eastern ½ of the project, prior to overlay.

Answer: We will revise the plans to add in quantity for the sealing asphalt cracks per KDOT Spec. 835.

6. Will there be a borrow site available?

Answer: Yes.

7. On some of the concrete tank crossings the existing crossing is larger than the replacement crossing. What treatment is required of the remaining void in the asphalt surfacing?

Answer: Full depth asphalt patch for the voids.

8. Is Geotextile required on top of the Drainable Base for the Tank Crossings?

Answer: No, see typical section for requirements

9. The aggregate shoulder material and base aggregate are respectively noted as “Millings“ and “(RAP)(Install Only)”. Is the Government going to furnish the RAP? On-site? If not on-site, where is the Government stockpile?

Answer: Government shall make available quantities in excess of milled sections.

10. Please confirm the stationing listed on the two notes of Plan Sht. 11 is correct.

Answer: Station 171+20 and 177+61. Revised plans shall be issued.

11. The typical cross section of the existing roadway is not uniform. The surface may require that the

Contractor deviate from the 5” of new asphalt at centerline and 2” overlay at the shoulders in order to achieve a 2% cross-slope. What is the controlling factor in the new pavement section? What tolerances are allowable to achieve the 2% cross slope?

Answer: Yes, you may deviate from the 5” and 2” thickness to achieve a 2% cross slope. Maintain a minimum 2” along the shoulder of the roadways.

12. Is a pre-cast option acceptable for the 7’ x 7’ x 60’ RCB at Sta. 209+90?

Answer: Yes.

13. The project scope listed in Para. 1.1.2 & 1.1.3, Section 01 11 00 of the Specifications makes reference to “Mill and Overlay…”. Yet, other than a few incidental areas, the project plans do not indicate any requirements to “Mill” the existing roadway surface. Please clarify.

Answer: Project is a straight overlay. Milling operations may only be at a few control points at existing concrete surfaces not scheduled for replacement.

14. Can Vinton School Road be closed during construction of this contract?

Answer: No. Sections of roadway may be closed for the RCB and pipe replacements as long as a suitable detour can be devised.

15. Drainage structures have northing/easting coordinates listed, but no project control listed on the plans.

Please provide the survey control information used for the project.

Answer: Coordinate system EPSG:102677 NAD 1983 State Plane Kansas North FIPS 1501 feet. Amended plans shall list coordinate system.

16. Comments made during the site visit on March 28 suggest the information on existing culvert modifications may be incomplete. Please clarify existing culvert information as to pipe size, type, and new work required at each location.

Answer: Amended plans will indicate pipe information. Benchmarks will be provided at the full pipe replacement locations.

17. Please clarify the treatment required for various sized surface cracks on the existing pavement.

Answer: See answer to question 5 above.

18. What specific information is required for the as-built drawings?

Answer: Any utilities unearthed during excavation with location and approx. depth. Any major changes to the plans that deviate from the published plans.

19. Will the agency allow the use of a pre cast reinforced concrete box, in lieu of a cast in place structure?

Answer: See answer to question 12 above.

20. Would it be possible to close Vinton School road from STA 0+00 to 4Corners for a short period of time?

There is no way to detour traffic, because this area is outside the perimeter fencing.

Answer: Yes.