Lake Placid Dam February Project Summary

Date of Report: February 16, 2025

Recent Activities:

Since the last Report on January 17, 2025 —

1. the third (3rd) lift structural concrete has been placed in Bay 2;

2. all of the maintenance bridge columns were poured, and three (3) out of the five (5) column caps were completed as well;

3. the maintenance bridge drill shafts were drilled, rebar was set, and concrete was poured to ground level;

4. concrete armoring on the north embankment continued;

5. rock riprap and concrete armoring has continued on the south embankment; and

6. the south embankment utilities and electrical work is still ongoing.

Change Orders:

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

2. Pending Change Order: Additional concrete footing is required for the stop log foundation. Sundt is developing pricing.

3. Pending Change Order: Lake Placid switchgear replacement. The Lake Placid switchgear (basically a high voltage switch) located at the Lake Placid substation no longer works and must be replaced. Sundt received pricing for the equipment, but the lead time was unacceptable. GBRA, Black & Veatch and Sundt are looking for alternatives to the specified equipment.

[“Switchgear” is a broad term that describes a variety of switching devices that address controlling, protecting, and isolating power systems, and include devices to regulate and meter power systems and technology.]

4. Potential Change Order: While excavating for dam armoring on the south side of the project, a Springs Hill Water Supply water line was damaged. The water line appears to be abandoned, but Sundt, Black and Veatch, and GBRA are still talking with Springs Hill Water Supply to determine the remedy.

[Note 1: Items 3 and 4 in this section were each listed as a “Pending or Potential Change Order” since first appearing in the August 2024 Project Summary.]

[Note 2: To date, Authorized Change Orders total $900,903.13. This sum is 2.3% of the original Contract. The largest Authorized Change Order to date was for the addition of a gantry crane at a cost of $484,921.34 which represents more than one-half (1/2) of the Authorized Change Orders total.]

Schedule:

1. The current Substantial Completion Date is now July 12, 2025 , which includes delays associated with obstructions found at the regulating pier while driving the pilings for the cofferdam in Bay 2.

2. Sundt continues to work at scheduling and work sequencing to make up days lost from previous unforeseen events as well as utilizing night crews (additional resources), and to evaluate methods to improve the construction schedule.

NOTE: With approved change orders to date, the Substantial Completion date for Lake Placid is July 12, 2025. It is important to note that the Substantial Completion date does not take into account the time needed to fill Lake Placid nor the final testing of the gates (as the lake has to be full in order to conduct the final testing).

Other Items of Interest:

1. Evaluation and resolution of an inquiry into the specified coating associated with the gates' seams (where the four (4) gate sections will be bolted together) is ongoing by GBRA (with Black and Veatch).

Upcoming:

In the next several weeks, we expect (1) the fourth (4th) structural concrete pours in Bay 2 [This will be performed in two pours – the south side first, and then the north side.]; (2) following completion of the structural concrete pour on the south side in Bay 2, rebar installation for the south abutment wall will begin; (3) completion of the remaining two column caps on maintenance bridge columns; (4) continued north and south embankment dam armoring, earthwork and concrete placements; and (5) to form and pour stop log storage foundations.

Updated Substantial Completion Date: July 12, 2025

Recent Photographs of Construction Activity/Progress —