Attachment A_PWS_REV1.pdf

Performance Work Statement (PWS) Eisenhower and Snell Lock Pressure Grout Repairs

1. Background Information:

The Great Lakes St. Lawrence Seaway Development Corporation (GLS or Corporation) is a wholly owned U.S. Government corporation within the U.S. Department of Transportation, which owns and operates that portion of the Saint Lawrence Seaway in U.S. territorial waters between Lake Ontario and Montreal, Canada. The Corporation’s function is to facilitate the safe and efficient passage of commercial vessels through the Seaway. A major part of this function is the operation and maintenance of Eisenhower and Snell Locks located in Massena, New York. These locks were constructed in the late 1950’s and opened to commercial navigation in 1959. The lock walls are composed of a series of mass concrete monoliths, with internal galleries and recesses that contain lock machinery and utilities.

There are numerous cracks, seams, and construction joints (all referred to as “cracks” in this document) in the walls and/or ceilings (surfaces) of these galleries and recesses that either currently leak water into the space or could leak in the near future. The cracks are of varying widths, but most are fine (approximately 3 mm. in width).

Although the cracked concrete is structurally stable, it is necessary to seal the cracks to prevent water infiltration and resultant corrosion and damage to equipment and facilities.

2. Mission/Purpose:

GLS has a requirement for a qualified Contractor to seal designated cracks in the selected recesses to stop current water infiltration and any infiltration in adjacent areas as a result of the work.

3. Scope:

An estimated total of 1817 linear feet of crack is to be sealed as summarized by location below. Note that the estimated quantities by area are not consecutive linear feet and will entail multiple locations within each area.

Eisenhower Lock

Recess Linear Footage (LF) of crack

Upstream South Cable Gallery 10

Upstream South Cable Riser 20

Downstream South Cable Gallery 5

Downstream South Cable Riser 20

North Cable Gallery 252

Upstream North Cable Riser 40

Downstream North Cable Riser 20

Upstream Crossunder Gallery 80

Downstream Crossunder Gallery 80

Eisenhower Total 527

Snell Lock Recess Linear Footage (LF) of crack

Upstream South Cable Gallery 300

Upstream South Cable Riser 20

Downstream South Cable Gallery 60

Downstream South Cable Riser 80

North Cable Gallery 700

Upstream North Cable Riser 20

Downstream North Cable Riser 20

Upstream Crossunder Gallery 30

Downstream Crossunder Gallery 80

Snell Total 1290

The specific cracks to be repaired will be indicated to the Contractor by the Contracting

Officer’s Representative (COR) in a walk-through inspection at the beginning of the project. Estimated Linear Feet is given as a reference. Pricing should be submitted as a lump sum to seal all water infiltration in the areas as listed in CLINs. The Contractor should be aware that there is high voltage and other utilities in these areas, and thus shall take appropriate safety precautions when working in the vicinity of them.

4. Requirements:

4.1 General

The Contractor shall furnish all labor, materials, equipment, and supervision necessary to seal active water infiltration through cracks, joints, or voids in concrete structures using a hydrophobic polyurethane injection resin.

All work shall be performed in accordance with manufacturer’s installation guidelines, industry best practices, and applicable safety regulations.

4.2 Materials

Approved Product: SPETEC PUR F400 Hydrophobic Closed Cell Polyurethane

Foam Injection Resin or approved equal.

Performance Criteria requirements for an approved equal:

- Hydrophobic: Designed to react with water to form a closed-cell, flexible foam.

- Expansion: Minimum free-foam expansion of 20 times original liquid volume.

- Water Cut-off Capability: Stops active water leaks under hydrostatic pressure.

- Durability: Resistant to shrinkage, chemical degradation, and long-term water exposure.

- Curing: Achieves full cure in accordance with manufacturer specifications

(typically within minutes).

4.3 Surface and Crack Preparation

Inspect and identify all cracks, joints, or voids with visible water infiltration.

Clean crack surfaces to remove dirt, laitance, grease, loose particles, or other contaminants that may impede bond or resin penetration.

Drill injection ports at proper spacing and angle to ensure complete crack penetration.

Flush cracks with clean water as required to facilitate resin expansion and penetration.

4.4 Injection Procedure

Install injection packers or ports at all designated locations.

Mix and prepare SPETEC PUR F400 (or approved equal) per manufacturer’s instructions.

Inject resin under controlled pressure until resin flow is observed at adjacent ports or until refusal.

Monitor pressure to prevent damage to surrounding concrete.

Remove packers after injection and patch holes with compatible non-shrink grout.

4.5 Quality Control

All materials shall be handled and installed by personnel experienced in polyurethane injection systems.

Contractor shall verify complete crack fill and leak cessation.

All repaired areas shall be inspected at least 24 hours after injection to confirm water infiltration has been eliminated.

Any areas still exhibiting leakage shall be re-injected at no additional cost to the Government until fully sealed.

5. Deliverables

Tasks Deliverables Due

Attend Kickoff Meeting with GLS representatives.

Within 15 days of award

CLIN 0001 Mobilization

CLIN 0002

Crack Repairs - Eisenhower Cable

Galleries

CLIN 0003

Crack Repairs - Eisenhower Cable

Risers

CLIN 0004

Crack Repairs - Eisenhower Cross

Unders

CLIN 0005 Crack Repairs - Snell Cable Galleries

CLIN 0006 Crack Repairs - Snell Cable Risers

CLIN 0007 Crack Repairs - Snell Cross Unders

CLIN 0008 Demobilization

6. Period of Performance

The Contractor shall begin performance within 10 calendar days and complete within ninety (90) calendar days after receiving the notice to proceed.

7. Government-Furnished Equipment, Property, and Services GLS will provide the following resources and services:

Access to the job site and secure work areas

Existing system drawings and documentation

8. Safety and Environmental Requirements

All work shall be conducted in accordance with applicable OSHA regulations, GLS safety policies, and federal/state environmental regulations.

9. Attachments

326-C-20/26 Robinson Bay Lock Cable Galleries Details

326-C-20/27 Robinson Bay Lock Miscellaneous Galleries Details

326-C-20/28 Robinson Bay Lock Cable Risers Details

326-C-20/29 Robinson Bay Lock Misc. Rooms and Access Bldg. Details

327-C-20/24 Upper Sill and Crossover Galleries Details

327-C-20/30 Robinson Bay Lock Cable Galleries Details

327-C-20/31 Robinson Bay Lock Cable Risers Details

327-C-20/32 Robinson Bay Lock Misc. Rooms and Access Bldg. Details

*It should be noted that cable trays, utilities and some other features are not shown on these drawings. Additional drawings can be made available for inspection, upon request.*