Q&A_04-09-19.pdf

AK NPS DENA 10(46)

West District Culvert Replacement, MP 62.7 and MP 63

# General Technical Question Answer Date

1 X Can the contractor use government provided riprap as the fish passage boulders, if the rock meets the specifications of 705.09?

No. See Subsection 105.02(b) 4/2/19

2 X Can the contractor anticipate any clearing or grubbing in the Toklat Pit?

Yes. See Subsection 105.04 (b). Bid accordingly.

4/2/19

3 X Can the contractor manufacture bedding material from the government provided source?

No. See Subsection 105.02(a)(1). 4/2/19

4 X Can native material from the box culvert excavation be used as backfill above the bedding zone?

Use material meeting the requirements of Sheet F.7 and Subsection 704.03 of FP‐14.

4/2/19

5 X Is there geotechnical data available? No. 4/2/19

6 X

If the contractor chooses to utilize temporary culverts for the diversion, will the government still require the detour to be designed by a professional engineer as stated in SP 562 Temporary Works?

Construct detours, diversions, and temporary culverts according to Subsection

157.10. If temporary works are

incorporated, comply with Section 562.

4/2/19

7 X Are photos of the existing culverts available?

This will be addressed under a forthcoming amendment.

4/9/19

Check General or Technical

8 X

I noticed that on the plans it says that the culvert will be single barrel. Does that mean that we are not allowed to pour it as a clam shell (a top half and a bottom half). Or does that just mean that it is a single passageway?

It will matter for pricing and trucking.

As shown on the plans, single barrel means single passageway.

4/9/19

9 X Can the culvert sections have a top and bottom section?

There is no restriction of this for precast culvert sections.

4/9/19