Q&A_Version_3_-_05.07.19.docx

Bailey Creek AOP Bridges (129AC719B0001) Questions and Answers Document

Subsequent versions of this document will contain questions from all previous versions.

Version 3: 05/07/2019

Q1 - In reviewing the information provided in the Q&A Version 1 dated 4/15/2019, question and answer 2 fails, in our opinion, to address the question adequately. The information provided in the StreamStats reports provides data to be expected in 8 different scenarios without indicating which, if any, would be potentially applicable to this work in this season. For example, the base item on the South Fork, 2 Year Peak Flood gives a value of 329 ft 3/s with a lower interval of 111 ft 3/s. The 111 ft 3/s equals 49,820 gallons/minute. The 329 ft 3/s equals 147,665 gallons/minute. None of the pictures provided in the solicitation visually support these values. However only one picture is dated for reference, (and that picture is included in both North and South Fork picture sets making it impossible to determine which fork this picture was of) and that date is August of 2015, during the height of the drought. Questions on this are as follows:

Q1a - Were all of the pictures from that same time?

A1a – Yes, the pictures are from the same time when channel surveys were being conducted for the design Q1b - What should we expect for flow rates this season in July and August when the bypasses would be installed A1b –We have provided all the informational data that is available to us.

Q1c - Do you have pictures from other years that could give comparable flows visually? The best pictures for us to visualize flow rates are of the downstream exit of the culverts.

A1c – No, we do not have pictures from other years, they were all taken at the same time when channel surveys were being conducted for the design

Q2 – Is the site accessible yet?

A2 – Yes, this site is now accessible

Version 2: 04/24/2019

Q1 - now that the project is bidding in June, is it the intent that the work will take place in 2020 now? Talking to the pre-casters, they are not sure there would be enough time to get contracts and submittals done before the season is over. Can you clarify if this job is going to start in 2020 now?

A1 - The intent is to have the contract start in 2019. Depending on the process, award date, and approvals, we might have to look at 2020 after the bid and award dates. The intent right now is still on track for starting the work in 2019.

Version 1: 04/15/2019

Q1 - Any idea when the site will be accessible?

A1 – There is currently still several feet of snow with additional accumulation as a recent storms. The bid closing date is being extended until 06/03/2019 as site accessibility is not expected until the middle of May.

Q2 - Do you have an estimated flow rate in Bailey Creek during the summer months? The plans indicate flows during a 100 year storm, but I was wondering what they would realistically be during construction. Is there a minimum flow rate that we have to design our bypass system for?

A2 – See attached StreamStats reports

Q3 - It appears that there is a minor amount of roadway excavation and embankment and possibly waste (sheet 8). There are no section 204 bid items or quantities given for this work.

Please revise the bid schedule to allow for this work.

A3 – In looking at sheet 8, it shows that there is some minor excavation shown within the existing road prism some of which extends below subgrade in the existing road. In examining the bid schedule there are two Bid Items associated with Section 204.

In reviewing the Supplemental Specification for the project there is no Type A or B Drainage Excavation in the Measurement portion of the section. There is however a description of Roadway Excavation as terms of

(a) Roadway excavation:

(1)(a) Roadway Prism Excavation;

(b) Rock Material excavated and removed from below subgrade in cut sections;

(c) Unsuitable material excavated and removed from below subgrade in cut sections;

areas when a pay item for sub excavation is not shown in the bid schedule;

(d) Ditches, except furrow ditches measured under as separate bid item;

The Designer who prepared the plans is not available to us to ask these types of questions. It is our interpretation that the work being asked about by this question is currently shown on the Schedule of Items as follows:

20418A Drainage Excavation, Type A ……………. 1,115 CY 20418B Drainage Excavation, Type B ……………. 730 CY