A.02.12 PWS Cable Lube KO Rev (3) APR22.docx

Washington Aqueduct Division PWS for: Dredge Cable Inspection and Lubrication

PERFORMANCE WORK STATEMENT (PWS)

INTRODUCTION/BACKGROUND: The Washington Aqueduct’s mission is to produce potable drinking water for the nation’s capital and its surrounding jurisdictions in Northern Virginia. In connection with its potable water treatment program, the Washington Aqueduct maintains 3 mechanical dredges to remove accumulated sediment form the raw water before it begins the chemical treatment process. This sediment accumulates in 3 separate basins or ponds and is collected by these mechanical dredges. At each basin/pond a mechanical dredge traverses the collection basin by using a network of wire rope cables and a series of electric drum winch’s mounted at specific locations. These winches are controlled by a PLC (Programmable Logic Controller) that has been programed to operate as necessary to position the dredge at appropriate locations in the collection basin/pond during operation.

GENERAL REQUIREMENTS: The intent of this contract is to provide OSHA required annual inspection and lubrication; preventive maintenance and repair services for a network of wire rope cables and electric drum winches that 3 individual basin dredges traverse on. This includes a total for the three basins of approximately 10,000 LF of 3/8” and approximately 3000 LF of 1 ¼” wire rope cables, 9 electric drum winches (3 at each basin) along with all associated pulleys, sheaves and connecting hardware at the 3 collection basins known as The Fore bay reservoir and Georgetown Basin 01 and Basin 02.

Replace approximately 3500 LF of 3/8” Galvanized Cable on Georgetown Basin #1 traverse cable.

Replace approximately 3500 LF of 3/8” Galvanized Cable on Georgetown Basin #2 traverse cable.

Period of Performance: The Period of performance is one base year and four option years.

Hours of Operation: The contractor will be responsible for performing the cable lubrication according to the mutually established schedule to be agreed to between the parties.

Place of Performance: The work of this contract is performed at 5900 MacArthur Blvd. NW, Washington, DC 20016.

CONTRACTOR FURNISHED ITEMS AND RESPONSIBILITIES:

Equipment: The Contractor shall furnish all necessary equipment, tools, supplies, and any other material necessary for the efficient, safe performance of this contract. Equipment shall be the type and size suitable for commercial operations.

SPECIFIC TASKS:

1) Preform the annual inspection of the wire rope cables, prior to their lubrication. The annual inspection is to be carried out in accordance with OSHA 29 CFR 1926.1413 and as applicable. The inspection records will be in a form document clearly legible and protected in a binder. Provide a certification record for the inspection which includes the date of inspection, the signature of the person who performed the inspection and an identifier for the rope which was inspected.

2) Perform inspection and manufacturers preventative maintenance on the 9 total electric drum winches. The annual inspection is to be carried out in accordance with the standards found in ASME B30.7-2016. The inspection records will be in a form document clearly legible and protected in a binder. Provide a certification record for the inspection which includes the date of inspection, the signature of the person who performed the inspection and an identifier for the drum winch that was inspected.

a) Provide labor, material and all necessary equipment, to provide once per year (annual) inspection and lubrication of approximately 13,000 LF of wire rope cable, consisting of approximately 10,000 LF of 3/8” and 3,000 LF 1 ¼” wire rope cable. Since the some of the cables are suspended over the water all cables will be lubricated with a water-soluble based lubrication which will be submitted for approval before being applied.

b) It is expected that the lubrication will be performed while the cables are connected to the dredge and the framework of posts. Some of the cables are suspended over the water and are not easily accessible. Means and methods of accessing the cables for inspection and lubrication are by the Contractor. The actual LF of cable may vary from the approximate amount listed above.

3) Procure a new 3500 linear foot long, 3/8” diameter, 6 x 37 IWRC galvanized steel cable.

Supply reel tests indicating the new cable exceeds the minimum strength characteristics indicated in the Attachments.

4) Install and rig a new Traverse Cable to the traverse and tensioning winches, pulleys, and trolleys, for Georgetown Basin #1 and Georgetown Basin #2. The Contractor will be responsible for all cutting, fastening, tensioning and measurements, as well as reconnection of all end stops, tensiometers, and appurtences on the traverse cable. General arrangements and standards for the cabling system are included in the attachments.

(End of PWS)