Lake Placid Monthly Engineering Construction Meeting Notes - July 2025

Schedule:

Substantial completion date is set for September 17, 2025.  The improvement of the substantial completion date is due to Sundt finding a temporary transformer to use while the permanent transformer gets to the site. The current critical path on the Lake Placid project is the hydraulics associated with the hydraulic cylinders and HPU that will raise and lower the gate in Bay 2.  Once the hydraulics are up and running, the gate in Bay 2 can be tested, side seals adjusted, pour back behind the side seals, then lower the gate in Bay 2, cut Bay 2 sheet piling and install stop logs on Bay1.  The minor flood experienced on and around July 4, 2025 will create additional costs and delays.  Sundt had pulled all of their equipment out of the work area, but clean-up will be substantial.

Work started and/or completed since the last monthly meeting:

1. Bay 2 side seals installation was ongoing

2. Bay 2 hydraulic cylinder installation completed

3. Maintenance bridge steel span over Bay 1 was installed

4. Hydraulic system connections and flushing was started

5. Maintenance bridge handrail, ladders and stairs were started

6. Powerhouse electrical and instrumentation was started

7. Stop log delivery and dry fitting was started

8. Generator was installed

9. Concrete armoring of the north embankment is ongoing

10. Rock riprap and concrete armoring of the south embankment is ongoing

11. South embankment utilities and electrical work is ongoing

Upcoming work (3 week look ahead)

1. Connect cylinders to HPU

2. Pre-check gate in Bay 2

3. Pour back the side seals (pour concrete behind the seals)

4. Grout hinges, trunnion, and dogging arm pads

5. Test cathodic protection system

6. Cut Bay 2 cofferdam sheet pilings

7. Install Bay 1 stop logs

8. Begin Bay 1 side seals

9. Continue armoring the north and south embankments

   
   
   
   

Change Orders

1. Pending Change Order:  Additional existing concrete riprap demolition, not initially quantified in the specifications, is required.  Sundt is developing pricing

2. Previously Approved Change Order:  The Lake Placid switchgear (basically a high voltage switch) located at the Lake Placid substation no longer works and has to be replaced.  This resulted in a change order of $153,668.22 with no additional days added to the Contract.  Because of the long lead time on this item, the change order will be taken off of the Contract between GBRA and Sundt and purchased and installed by GBRA at a later date so as to not adversely impact the project schedule.  Additionally, GBRA believes the work can be completed at a lesser price

3. Pending Change Order:  The light pole supports on the maintenance bridge will require modification.  The proposed change order was given to Black and Veatch who then provided comments.  Sundt is addressing those comments with their vendor

4. Pending Change Order:  Differing site conditions where the concrete armoring will tie into the existing electrical substation required a change to the design – the addition of a retaining wall with spread footing.  Sundt is finalizing the cost proposal