A-11 Q and A Version 1 - 103020.docx

Questions and Answers Document

Trinity Boat Center Ramp, Phase II (127EAW21B0001)

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

Version 1: 10/30/2020

Q1: Are the dewatering elevations for the top of the 3’ and 6’ cofferdams as referenced to the end of boat ramp grade of 2292.35 (2295.35 & 2298.32 respectively) or from the existing ground which is roughly 1-1.5’ lower?

A1: Neither, they are totally random depending on how the lake levels rise during construction. If the lake starts coming up fast and there is a threat of the lake overtaking the project then a cofferdam would be deployed to give time to finish.

Q2: Is there a local permanent spoil area available for the surplus excavated material?

A2: See A6 below

Q3: When was the previous phase completed (year)?

A3: 2019

Q4: Regarding owner-furnished materials: are the anchor studs already welded to the 24” sections of steel angles?

A4: Yes, anchor studs are welded to the 24" sections of steel angles and are galvanized.

Q5: Sheet 7 shows a photo of stockpiled riprap. Is this stockpile for use on this contract phase? If so, is there adequate quantity stockpiled to accomplish this entire contract phase?

A5: The stockpiled riprap was being put onsite to finish the whole project but lake levels rose fast and not all of the riprap was brought in to finish the project. There is approximately 55 feet of riprap protection under phase I that needs to be placed still. There is roughly 75 cubic yards of rock on site, rough calculation, and it should take around 20-25 cubic yards to finish Phase I leaving approx. 45-50 cubic yards to use on phase II. That would leave around 35 -40 cubic yards needed to finish. Finishing the placement of riprap from Phase I (approx. 55 feet / 20-25 cubic yards) should be included in pay Item 25110

Q6: Can excavation spoils be left (placed/spread neatly) onsite or is there another desired disposal location provided?

A6: Excavated materials must be removed from below high-water mark of the lake. There is a disposal site 14 miles from the project that could be used. Some local rock quarries will take soil materials from time to time too.