Attachment A_PWS.pdf

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

1. Background InformaƟon:

The Great Lakes St. Lawrence Seaway Development CorporaƟon (GLS or CorporaƟon) is a wholly owned U.S. Government corporaƟon within the U.S. Department of TransportaƟon, which owns and operates that porƟon of the Saint Lawrence Seaway in U.S. territorial waters between Lake Ontario and Montreal, Canada. The CorporaƟon’s funcƟon is to facilitate the safe and efficient passage of commercial vessels through the Seaway. A major part of this funcƟon is the operaƟon 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 navigaƟon in 1959. The lock walls are composed of a series of mass concrete monoliths, with internal galleries and recesses that contain lock machinery and uƟliƟes.

There are numerous cracks, seams, and construcƟon 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 infiltraƟon and resultant corrosion and damage to equipment and faciliƟes.

2. Mission/Purpose:

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

3. Scope:

An esƟmated total of 1817 linear feet of crack is to be sealed as summarized by locaƟon below. Note that the esƟmated quanƟƟes by area are not consecuƟve linear feet and will entail mulƟple locaƟons 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 ContracƟng

Officer’s RepresentaƟve (COR) in a walk-through inspecƟon at the beginning of the project. The actual amount of crack repair work done may vary from the esƟmate above. The Contractor should be aware that there is high voltage and other uƟliƟes in these areas, and thus shall take appropriate safety precauƟons 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 acƟve water infiltraƟon through cracks, joints, or voids in concrete structures using a hydrophobic polyurethane injecƟon resin.

All work shall be performed in accordance with manufacturer’s installaƟon guidelines, industry best pracƟces, and applicable safety regulaƟons.

4.2 Materials

Approved Product: SPETEC PUR F400 Hydrophobic Closed Cell Polyurethane

Foam InjecƟon 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 Ɵmes original liquid volume.

- Water Cut-off Capability: Stops acƟve water leaks under hydrostaƟc pressure.

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

- Curing: Achieves full cure in accordance with manufacturer specificaƟons

(typically within minutes).

4.3 Surface and Crack PreparaƟon

Inspect and idenƟfy all cracks, joints, or voids with visible water infiltraƟon.

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

Drill injecƟon ports at proper spacing and angle to ensure complete crack penetraƟon.

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

4.4 InjecƟon Procedure

Install injecƟon packers or ports at all designated locaƟons.

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

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

Monitor pressure to prevent damage to surrounding concrete.

Remove packers aŌer injecƟon and patch holes with compaƟble non-shrink grout.

4.5 Quality Control

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

Contractor shall verify complete crack fill and leak cessaƟon.

All repaired areas shall be inspected at least 24 hours aŌer injecƟon to confirm water infiltraƟon has been eliminated.

Any areas sƟll exhibiƟng leakage shall be re-injected at no addiƟonal cost to the Government unƟl fully sealed.

5. Deliverables

Tasks Deliverables Due

AƩend Kickoff MeeƟng with GLS representaƟves.

Within 15 days of award

CLIN 0001 MobilizaƟon

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 DemobilizaƟon

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

ExisƟng system drawings and documentaƟon

8. Safety and Environmental Requirements

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

9. AƩachments

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, uƟliƟes and some other features are not shown on these drawings. AddiƟonal drawings can be made available for inspecƟon, upon request.*