100295_Concrete_Pipe_Structures_Scope_of_Work.pdf

PRECAST CONCRETE STORM PIPE AND STRUCTURES

FOR

SW 209TH AVE (KINNAMAN RD TO ALEXANDER ST) PROJECT

BID INFORMATION

The work to be done under this contract consists of the following in Washington County:

1. Furnishing 585 linear feet (lay length) of 42-inch nominal diameter reinforced concrete storm conveyance pipe and gaskets.

2. Furnishing 5 precast concrete storm structures (summary table below).

3. Delivering precast concrete pipe and structures to the project site.

4. Coordinating delivery of pipe and structures with the County’s roadway Contractor.

5. Perform additional and Incidental Work as called for by the Specifications and Plans.

BIDDERS:

All materials shall meet or exceed Clean Water Service’s Design & Construction Standards: R&O 19-5 as

Amended by R&O 19-22, adopted November 12, 2019 and Sections 00445 and 00470 of the 2021 Oregon Standard Specifications for Construction.

Reinforced concrete pipe shall be Class V. Gaskets shall conform to the requirements of ASTM C443.

Materials for precast concrete structures shall conform to the requirements of ASTM C478. Minimum wall thickness shall be five inches.

Commercial grade concrete and reinforcement shall conform to 2021 Oregon Standard Specifications for

Construction.

The manufacturer or fabricator shall furnish appropriate certification, based on the manufacturer’s quality control tests, that the materials used in the production of the pipe and structures meet these specifications.

The manufacturer or fabricator shall furnish shop drawings prior to fabrication of materials.

Bid shall include cost of delivery to Project Site: SW 209th Ave between SW Kinnaman Rd and SW Alexander

St in Aloha, Oregon 97007. Delivery shall be coordinated with the road project prime contractor (to be determined).

ADDITIONAL SPECIFICATIONS FOR CONSTRUCTION

Handling, Storing, and Shipping

Materials - Store materials in a manner which will protect the materials from contact with soil and weather.

Anticipated Delivery Date of Materials – The anticipated delivery date for the materials is between May 2, 2022 to June 3, 2022. The actual delivery dates and rate of delivery will be determined by the County’s roadway contractor who will be selected in the spring 2022.

Project Work Schedule – Provide a work schedule showing anticipated fabrication and delivery of materials. The initial schedule shall be submitted within 14 days of Notice to Proceed and updated as required by the County.

Measurement & Payment

Measurement – The quantity of pipe will be measured on the lay length basis. The quantity of structures will be measured on the lump sum basis.

Payment - The accepted quantities of pipe and related work items performed under this contract will be paid for at the Contract unit price, per foot.

The accepted quantities of structures and related work items performed under this contract will be paid for at the Contract unit price, per unit of measurement.

Payment for precast structures includes all required precast sections, inlet tops, standard manhole frames and covers, preformed manhole gaskets, and manhole/catch basin steps/ladders.

Payment will be payment in full for furnishing and delivering all materials, and for furnishing all equipment, labor, and incidentals necessary to complete the work as specified.

No separate or additional payment will be made for delivering materials to the project site, coordinating with the County’s roadway contractor for delivery of the materials, storing materials prior to delivery, and updating schedules.

Material on Hand

Payment for stockpiled materials on hand may be allowed according to the following:

Advance Allowance for Materials on Hand:

(a) General - If the total value of Materials on hand is at least $1,000, or the total value of a single class of Materials on hand is at least $500, the Engineer may authorize an advance allowance for the Materials in the progress payments. The Agency will not make advance allowances on the Materials unless the following three conditions are satisfied:

(1) Request for Advance Allowance - If Materials on hand meet the requirement of (2) below, an advance allowance will be made if:

• A written request for advance allowance for Materials on hand has been received by the Engineer at least 5 Calendar Days before the pay period cutoff date; and

• The request is accompanied by written consent of the Contractor's Surety, if required by the Agency.

(2) Stored or Stockpiled Conditions - The Materials shall have been delivered and/or acceptably stored or stockpiled according to the Specifications and as follows:

• On property in the State of Oregon on which the property owner has authorized storage in writing. The written authorization must allow the Agency to enter upon the property and remove Materials for at least 6 months after completion of the Project. The Contractor shall furnish a copy of the written permission to the Agency; or

• On property outside the State of Oregon on which the property owner has authorized storage in writing, provided that such storage location is allowed by the Special Provisions or authorized in writing by the Engineer. The permit must allow the Agency to enter upon the property and remove Materials for at least 6 months after completion of the Project. The Contractor shall furnish a copy of the written permission to the Agency.

To be eligible for advance allowance, the Materials shall:

• Meet Specification requirements;

• Have the required Materials conformance and quality compliance documents on file with the Engineer (see Section 00165);

• Be in a form ready for incorporation into the permanent Work; and

• Be clearly marked and identified as being specifically fabricated, or produced, and reserved for use on the

Project.

(3) Responsibility for Protection - The Contractor has full control and responsibility for the protection of Materials on hand from the elements and against damage, loss, theft, or other impairment until the entire Project has been completed and accepted by the Agency.

If Materials are damaged, lost, stolen, or otherwise impaired while stored, the monetary value advanced for them, if any, will be deducted from the next progress payment.

If these conditions have been satisfied, the amount of advance allowance will be determined by one of the following methods as elected by the Engineer:

• Net cost to the Contractor of the Materials, f.o.b. the Project Site or other approved site; or

• Price (or portion of it attributable to the Materials), less the cost of incorporating the Materials into the

Project, as estimated by the Engineer.

(b) Proof of Payment - The Contractor shall provide the Engineer with proof of payment to the materials Suppliers for purchased Materials within 30 Calendar Days of the date of the progress payment that includes the advance allowance.

If proof of payment is not provided, sums advanced will be deducted from future progress payments, and the Engineer will not approve further prepayment advance allowance requests.

(c) Terminated Contract - If the Contract is terminated, the Contractor shall provide the Agency immediate possession of all Materials for which advance allowances have been received, as provided above. If, for any reason, immediate possession of the Materials cannot be provided, the Contractor shall immediately refund to the Agency the total amount advanced for the Materials.

The Agency may deduct any amount not so refunded from final payment.

Storm Structure Summary Table

Structure # Station Nominal Inside

Diameter Construction

Note # Plan Sheet # Profile Sheet # Detail Sheet #

1 40+67.25 96-Inch 6 14/14A 14A-2 GJ-9

2 10+70.00 84-Inch 11 14/14A 14A-4 GJ-9

3 12+21.00 84-Inch 2 16/16A 16A-2 GJ-9

4 14+22.00 96-Inch 3 16/16A 16A-2 GJ-9

5 15+23.00 96-Inch 4 16/16A 16A-2 GJ-9