FOS_Tuffboom - Purchase Description.pdf

PURCHASE DESCRIPTION

FOSTER DEBRIS BOOM AND SCREENS PURCHASE

Foster Dam, Linn County Oregon

Scope:

This Purchase Description covers the purchase of TUFFBOOM Waterway Barrier and Domestic

Interconnection Hardware

Background:

Debris boom and screens are placed across reservoirs to prevent wood and trash debris from reaching the dam, intake gates, and/or spillway gates. This debris potentially would cause damage to structures, or impact mission critical water release by becoming lodged.

Justification:

The current boom has reached end of life cycle (>10yrs), requiring excessive repairs resulting in increased labor expenditures and risk to operations. The lack of reliable log boom also presents a public safety hazard; FOS reservoir is a commonly used recreational site, without protection from the facilities outlets the public could be put in extreme danger without warning. The log boom deficiency also creates an increased risk of debris build-up blocking the spillways in extreme storm events; this risk has the capacity to cause substantial damage to the facility.

Requirements:

1. Purchase of One Hundred (100) TUFFBOOM WATERWAY BARRIER with Self Rescue Handle, Orange, No Graphics. Supplied with Patent-Pending Shackle-Free 90-kip, Cast bottom plates and 3-Link chain pre-assembled to booms prior to shipment.

2. Purchase of One Hundred (100) Tuffboom Domestic Interconnection Hardware.

3. Freight Charges

BOOM: MATERIALS:

Floatation logs shall be 100 boom logs not previously used for any other purpose and shall be supplied by a manufacturer with not less than 5-years’ experience providing logs booms for the specified purpose.

Floatation logs shall consist of an external encasement (A), internal foam fill (B) and internal structural steel channel (C) through which all external interboom connections are attached. Each floatation log shall be cylindrical in shape and shall include recessed longitudinal ribbing to provide impact strength and load resistance. The nominal diameter shall be 16-inches as measured with a 16-inch diameter circle template placed at one end of the flotation log. Flotation logs shall be 120-inches in length. The average total dry weight of each floatation log with the bottom steel connector plate shall be 141 pounds. Each flotation log shall be designed to maintain its originally supplied buoyancy even if structurally damaged or punctured.

Each flotation log shall be designed to maintain its original buoyancy when supplied with underwater screen attachments. This buoyancy shall not be reduced even if the floatation unit is structurally damaged or punctured.

Encasement "A". shall be rotationally molded using rotationally molding grade linear low-density polyethylene or linear medium grade polyethylene. Polyethylene encasement shall have a minimum density of 0.935 g/cm3 as determined by ASTM 01505-68 and be UV-stabilized for long-term environmental exposure. The nominal wall thickness of the polyethylene encasement shall be 0.170-inch. The standard encasement color shall be international safety orange unless alternate colors are requested. Ergonomically designed handhold built into each unit, a person in distress can grab hold of and hang on to the boom during an emergency.

Internal Foam "B". Polystyrene shall meet the requirements of ASTM C-578 and shall have a minimum in-place density of 0.9 pounds per cubic foot and a maximum in-place density of 1.2 pounds per cubic foot. Water absorption of polystyrene shall not exceed 3% by volume as tested per ASTM C-272.

Polystyrene shall be unable to support combustion without an external heat source. Polystyrene fill shall take up a minimum of 95% of the interior volume of the boom. Under no circumstances will the percentage of foam fill be less than 90% of the interior volume of the boom. Polystyrene shall be produced by a manufacturer who has been continuously engaged in the production of styrene foam for flotation for a minimum of five years. The buoyancy of the floatation unit will not be reduced as long as the foam remains in place.

Internal Structural Steel Channel "C". Each floatation log shall be fabricated with a structural steel channel according to ASTM A572-Grade 50 structural steel, with a 4" external channel width and a minimum ultimate tensile strength of 57,000 pounds. The weight of each channel shall not be less than 5.4-pounds per foot. Material certification shall be made available by the manufacturer on request. The structural channel shall be located such that it is on the interior of each floatation log, centered across the width and positioned on the bottom interior surface to provide anti-rolling features to the boom unit. Each channel must be positively secured in place A325 Structural steel bolts and a heavy wall external flat plate. Materials that are molded in place or through wall mold-in channels or plates are not permitted due to the different thermal properties of steel and polyethylene and the resulting risk of physical separation of material in the field. All load bearing connections between floatation logs shall be designed such that the load is distributed through this channel.

INTERCONNECTING HARDWARE:

All connecting hardware between floatation units shall consist of bottom steel connector plates (item "A"), load-rated galvanized safety shackles (item "B") and load-rated galvanized weldless links (item "C"). The connections between flotation units shall be engineered to minimize wear and maximize load-bearing capacity. All external connecting hardware must be of galvanized steel construction. The use of non-metallic materials, such as pvc belting, or other materials that can be cut, ripped, or torn or are subject to environmental degradation shall not be acceptable.

Item "A". Bottom steel connector plates shall be fabricated from 5/8" thick x 3" wide steel plate, ASTM A572, Grade 50, "Specification for Structural Steel", with one 1-1/8" hole punched in the center of one end of the plate 1-1/2-inches from each edge. Two %-inch slotted holes and one %-inch hole shall be punched on the opposite end according to drawing A10TB-106-01. Each bottom plate shall be free of burs and hot-dipped galvanized for corrosion resistance. Each bottom connector plate shall be affixed to the internal steel channel of the floatation unit using A325 structural steel bolts, nuts and washers. Bottom plates shall be factory assembled to the floatation units prior to shipment.

Item "B". Connection shackles shall have a minimum pin diameter of %-inch, be of a safety type with safety nut, be hot-dipped galvanized for corrosion resistance and have a WLL (working load limit) of not less than 4-3/4 tons. The WLL rating shall be clearly identified on the body of each shackle. The minimum average tensile breaking strength of each shackle shall be 60,000 lbs. and be certified to be proof tested to 57,000 pounds working capacity. Manufacturer is responsible for providing testing certificates attesting to load capability of connectors. Each shackle shall be supplied with a stainless-steel straight cotter pin to prevent the safety bolt from coming loose. "R" type cotter pins shall not be acceptable.

Item "C". Weldless links shall be %-inch, be hot-dipped galvanized for corrosion resistance and have a WLL (working load limit) of not less than 4-3/4 tons. The WLL rating shall be clearly identified on the body of each shackle. The minimum average tensile breaking strength of each shackle shall be 60,000 lbs. and be certified to be proof tested to 57,000 pounds working capacity. The weldless link may be substituted with alternate connectors to achieve a wider gap between floatation units. Where any alternate connector is utilized, it must exceed the 57,000-pound proof tested working capacity of the weldless link.

Use of lower strength connectors in a stacking or doubling configuration shall not be acceptable.

Shipping: Booms and hardware shall be delivered to:

1. Foster Boneyard located in Sweet Home, OR approximately 32 miles East of I5 via OR-228, approximately a ½ mile from Foster Dam, 2000 53rd Ave., Foster, OR 97345.

2. When delivery is set, please call and schedule with Brian Wooley (541) 349-3048, Nate Jones

(541) 954-0794, to guide you to Foster Boneyard actual.