QA_01-09-2023.pdf

AK BLM GFO 2019(1)

Sourdough Campground Bridge

# General Technical Question Answer Date

1 X Do you have any as builts for the existing bridge?

As‐Builts are not available. See Physical

Data file named

FY20_SourdoughCGBridge_InspRpt

7_22_2020 final.pdf for existing conditions.

12/20/2022

2 X

What is the cable attached to the existing bridge? Electrical? Communications? And who is the owner?

Plan Sheet D.2 shows the existing utility lines in the vicinity of the bridge. See Sheet

A.3 for Plan Symbols and Abbreviations;

and see Subsection 107.02 for specifications regarding the utility relocation requirements for this project.

12/20/2022

3 X

How do the specifications for this project differ from those of the project previously bid on May

4, 2022?

Please submit bids according to the solicitation documents under this project re‐solicitation.

12/20/2022

4 X What is the purpose of the Temporary

Diversion Channel?

Sheet E.4 has been provided to show details for a Temporary Diversion Channel that may be constructed. See revisions under Amendment A002 and please submit bids according to the solicitation documents.

See callouts on Sheet E.1.

1/9/2023

12/20/2022

5 X Is Sourdough Creek an Anadromous fish creek?

See last sentence under Regional Condition

G on Page H‐31.

12/20/2022

6 X

Will a State of Alaska, ADF&G Habitat Permit be required for this project? And, if so, have you acquired the permit?

The prescribed work does not require an

Alaska Fish Habitat Permit. Comply with the requirements of Subsection 107.01, and please submit bid according to the solicitation documents.

12/20/2022

7 X

There are several references to asphalt concrete in the specifications. Is asphalt concrete anticipated on this project?

No. 12/21/2022

8 X

575.04 Acceptance refers to minor bridge work

on the Gibbon River Bridge. I assume that is left over from another project.

This will be addressed under Amendment

A001.

12/21/2022

Check General or Technical

9 X

Substantial Completion is November 30, 2023

(though completing the bridge (concrete, grout) after early October will be very difficult with the freezing, sub‐zero temperatures), and final is November 11, 2024. What constitutes substantial completion on this project, completion of the new bridge, or completion of the new bridge and removal of the temporary bridge?

Substantial completion is defined at the top of FP‐14 Page 10.

12/21/2022

10 X

The typical cross sections shown for a diversion ditch are meant for a culvert replacement where a new ditch is cut outside the flowing water. In this case, the diversion is to be placed down the middle of the creek, there is maybe

13’ between riprap toes on the east and west side, and the riprap excavation is about 7’ deep.

It seems like it would be very difficult to come up with a solution that would satisfy all the specs and permits. In addition, there isn’t much room under the bridge to utilize for the diversion. If we need a diversion to handle 664

CFS and the hydraulic info says the current would be 4.7 feet/second, we would need something like a 4’ high, 35’ foot wide channel.

Seems there isn’t this kind of room there. Do you have any typical cross sections that are anything like what you are asking the

Contractor to come up with on this job? A sketch would be fine.

This will be addressed under Amendment

A002.

1/9/2023

11 X

It will only take a day or so each side to excavate and place the lower extents of the riprap. Could the Contractor schedule this during normal water flows rather than building a diversion for a 2 year flood? A diversion for

Ordinary High Water conditions would be much less expensive and constructable than a diversion for a 2 year flood condition.

This will be addressed under Amendment

A002.

1/9/2023