QA2_10-10-2025.pdf

Project No. OR FLAP DOT CRGNSA 100(9)

Project Historic Columbia River Highway State Trail, Perham Creek to Mitchell Point

# General Technical Question Answer Date

1 X

Pay Item No. 65102-0000, Rockfall Protection Fence, 10’ Flexible Barrier a.Line Item No. A1680 on the Summary of Quan es show 450-ft of barrier; however, the plans and installation schedule show the barrier is installed from

Station 322+50 to Station 326+00, a total of 350-ft.

Should we bid 350-ft or 450-ft?

b.Regarding the same line item for the 10’ high flexible rockfall barrier, no energy level is provided. The installation schedule refers to Energy Level

Classification 2. However, after thoroughly reviewing the project plans/specs and the FHWA Standard

Specification, we are unable to determine what that refers to in terms of the Maximum Energy Level (MEL) that the barrier must resist. Could you please specify the MEL requirement for the 10’ high barrier?

The pay item in your question is not applicable to this stage of the project.

See page 2 of the WFLHD GR 3-19 (Geotechnical

Report) under section Geotechnical Report

Intended Use for additional information.

Refer to the IFB_69056725B000012_OR FLAP

DOT CRGNSA 100(9)_Final.pdf & ora-dot-crgnsa100-9_plans.pdf for the bid schedule and summary of quantity information applicable to this solicitation.

10/7/25

2 X

Pay Item No. 65102-0000, Rockfall Protection Fence, 6’

Flexible Barrier a.Line Item No. A1660 on the Summary of Quan es show 910-ft of barrier; plan sheets A18 to A20 seem to coincide with the Pay Item. However, the Tabulation of Rockfall Mitigation Quantities beginning on Page

A57 (Specifically A59-A61) and summarized in the

Installation Schedule on Page A65 show 1010-ft of barrier. Should we bid 910-ft or 1010-ft of barrier?

b.Regarding the same line item for the 6’ high flexible rockfall barrier, no energy level is provided. The installation schedule refers to Energy Level

Classification 2. However, after thoroughly reviewing the project plans/specs and the FHWA Standard

Specification, we are unable to determine what that refers to in terms of the Maximum Energy Level (MEL) that the barrier must resist. Could you please specify the MEL requirement for the 6’ high barrier?

The pay item in your question is not applicable to this stage of the project.

See page 2 of the WFLHD GR 3-19 (Geotechnical

Report) under section Geotechnical Report

Intended Use for additional information.

Refer to the IFB_69056725B000012_OR FLAP

DOT CRGNSA 100(9)_Final.pdf & ora-dot-crgnsa100-9_plans.pdf for the bid schedule and summary of quantity information applicable to this solicitation.

10/7/25

Check General or Technical

3 X

The bar lists shown on plan sheets SP.14 thru SP.18 do not have weights listed – is this intentional? What I’m trying to discern really is if there is any rebar that’s incidental to other items that wont be measured and included in CLINS A1060 and A1080?

1.a) Yes, bar lists on SP.14 thru SP.18 are left blank intentionally. The bar lists are to be filled out by the Contractor and submitted to the CO as reinforcing steel order lists according to Section

554.03.

1.b) Rebar for Mitchell Creek Bridge and Perham

Creek Bridge cast-in-place structural concrete is paid for under Reinforcing Steel CLIN A1060 and

A1080.

1.c) Rebar for precast elements, CLINs A0960, A1000, A1020, A1040, and A1100, is not separately measured for payment and is included in the precast concrete pay items.

10/10/25

4 X

Plan sheets D.10 and D.19 show concrete sidewalk placed below asphalt surfacing. What CLIN should contractors place their costs under for those slabs and reinforcing steel?

The 6” concrete slab foundation and reinforcing associated with the “Stone Masonry (Flush Basalt

Band, xx-inch)” as shown on detail sheet D.19 are included in the Linear Foot cost of each respective Stone Masonry (Flush Basalt Band, xx-inch) bid item. See Section 620 Stone Masonry for Concrete foundation & rebar work.

10/10/25

5 X

Is micropile casing required to be prime made and melted domestic pipe with mill certs? Or is domestic mill secondary pipe without mill certs acceptable?

Mill certs are required. Steel pipe for micropile casing must conform to Subsection 715.05(a)

ASTM A252, Grade 2 or Grade 3. Acceptance of micropile materials will be in accordance with

Subsection 567.08 and Subsection 106.03. See

FHWA Std. Spec FP-14, Section 567 Micropiles, Subsection 567.08 Acceptance, and Subsection

106.03 for details.

10/10/25

6 X

Micropile unfactored design loads are called out in the notes as 110 kips (Mitchell) and 86 kips (Perham). Is the design load in compression, tension, or both?

The load is in compression (downward), but can be verified/tested in compression or tension.

10/10/25

7 X

Micropile casing on drawing RG3176-D is shown as

7.625" OD x 0.500" WT. Is this intended to be the minimum OD and wall thickness for the contractor designed micropile?

Yes, these are minimum OD and minimum wall thickness values.

10/10/25

8 X

Micropile casing on drawing RG3175-D is shown as

9.625" OD x 0.500" WT. Is this intended to be the minimum OD and wall thickness for the contractor designed micropile?

Yes, these are minimum OD and wall thickness, but the inside diameter cannot be less than

8.625” for the threaded casing option (Option 2).

10/10/25

9 X

Is PCI B-4 plant certification required for the prestressed slabs? There are no deflected strands in these slabs, so a PCI B-3 plant could produce them.

This will be addressed under Amendment A001. 10/10/25