Garrison crane services_SOW_20250519_R1.pdf

Scope of Work Crane Services for Garrison Dam Spillway Modification Frost Blanket Investigation 19 May 2025

The Contractor shall provide a crane capable of lifting, placing, and removing a 24,000 lbs Geoprobe 3230 track mounted drill rig and support equipment (less than 24,000 lbs) into and out of the Garrison Spillway. The Contractor shall submit details and plans on the required crane and lifts.

The following requirements shall be met:

1. The crane shall be capable of supporting a load of 24,000 lbs, have a relatively long reach, and meet these additional requirements:

a. The gross aggregate load from the crane, rigging, and lifted load shall not exceed 350,000 lbs and during any point of the lift the center of gravity of crane with outriggers deployed shall not be closer than 30 feet to the stem wall.

b. The top of the spillway wall to the floor of the spillway is approximately 25 feet.

c. The deer fence on the spillway wall is 10 feet tall above ground surface.

d. This is a critical lift due to the lift being out of the operator’s view.

2. One mobilization and demobilization to place the drill rig and support equipment into the spillway shall be required on 2 June 2025. The duration of work required to place the drill rig and support equipment shall be 1 day or less.

3. A second mobilization and demobilization to remove the drill rig and support equipment from the spillway shall be tentatively required on 11 July 2025; the required date will be determined by the Government and communicated to the Contractor one week in advance of the required date. The duration of work required to remove the drill rig and support equipment shall be 1 day or less.

4. The Contractor shall submit an Accident Prevention Plan (ENG Form 6293) and Emergency Plan per EM 385-1-1 dated March 2024 section 2-7. The Contractor shall include all required appendices including AHA and site-specific plans (for example: Standard or Critical Lift Plan, Section 16-7) as stated in ENG Form 6293. All crane operation, rigging, and equipment shall adhere to EM 385-1-1.

5. Contractor personnel access to the spillway is limited to a fixed ladder. Contractor personnel shall be required to sign onto the Corp’s Hazardous Energy Control work permit prior to entering the spillway slab.

6. The Contractor shall deliver the crane to the site shown on the attached figures;

the exact insertion point will be determined by USACE in coordination with the Contractor based on site conditions.

7. The Contractor shall provide all equipment and perform all work necessary to insert and remove the drill rig and support equipment. This shall include coordination with the USACE drilling representative and the Garrison Dam Project Office point-of-contact so that crane activities can be planned and appropriate crane-support equipment provided.

8. The Contractor is responsible for coordinating with the USACE drilling representative and the Garrison Dam Project Office point-of-contact to minimize wait time. The Contractor will not be compensated for any wait time resulting from poor coordination with the POC’s.

9. The Contractor shall provide a crane operator and any necessary support personnel. These costs shall be included in the proposal.

Garrison Dam Spillway near Riverdale ND.

Approximate area on west side of spillway for crane access depicted by red rectangle and overhead powerlines depicted for avoidance.

Geoprobe 3230 Track rig with additional pics showing tie down locations on the sides of the tracks.

Crane placing rig in spillway last fall.

Picture showing deer fence adjacent to spillway wall.

Picture showing the deer fence on the west side of the spillway facing upstream.

Picture showing the deer fence on the west side of the spillway facing upstream.