00613 1304027 QSJ RCLR Road Repair FINAL SOW 050720.pdf
Date Originally Posted
March 24, 2022, 9:48 a.m.
Federal Aviation Administration AJW-2W15D INFRASTRUCTURE SUPPORT CENTER WESTERN SERVICE AREA JCN 1304027 QOSJ RCLR Road Repair MURRAY HILL, OR MAY 2020 SCOPE OF WORK 1304027 QSJ RCLR Access Road Repair May 2020 GENRAL SUMMARY OF WORK PART 1 - GENERAL 1.1 SCOPE The Contractor shall furnish the materials listed below that are associated with the repair of the access road to the RCLR, owned by the Federal Aviation Administration (FAA) and located in MURRAY HILL, Oregon. The work outlined below covers the uppermost 0.8 miles road as shown on the associated project drawings as specified. Prior to FAA use of the material, all of the equipment and material shall be reviewed and accepted by a FAA representative and include written documentation of the content of each load delivered. The following items are a summary of the project and are provided solely for the purpose of describing the general nature of the work. The Contractor is responsible for accomplishing all items of work identified below: A. General 1. All work shall be coordinated with the FAA and be accomplished with minimal impact to the FAA and other road users. Construction material shall be stored only in FAA approved staging areas or at locations in the construction area where it can be of immediate use to and as directed by FAA personnel. The Contractor shall provide all temporary services such as, water, etc., that are required for the delivery of material as it is listed on mix tickets. Tools to assist with providing these temporary services shall be provided and maintained by the Contractor, and removed upon project completion. The Contractor shall excavate approximately 530 yd? from the first section of access road to a depth of 12” below grade removing loose and unsuitable subgrade materials. Materials shall be disposed of off-site or as approved by leasing authority. Section of road to be excavated is indicated in drawing QSJ-1304027-C001. Minimize damage or disturbance of existing culverts. Pre-load shoulders with existing excavated soil to a depth of 12”. Pre-loaded material shall be removed prior to installation of base course. Install geotextile fabric newly excavated road section prior to structural fill. Scope of Work Page 1 of 12 1304027 QSJ RCLR Access Road Repair May 2020 7. Contractor shall install new structural fill and compact in compliance with Oregon DOT standards and specifications. 8. The Contractor shall install base material on top of new structural subbase. 9. The Contractor shall supply additional gravel for facility fence to bring into security compliance of a maximum of 2” clearance from firm grade to bottom of existing fence fabric. 10. The Contractor shall, excavate and replace culvert located approximately at STA 26+00, and re-dig ditch sections clear of debris for all culverts. 11. Surrounding overgrowth shall be cleared to 15’ from center of access road and reseeded. Overgrowth surrounding VOR facility shall be cleared out to 10’ from fence line. See reference drawing QSJ-D-RCLR-C001 for facility fence. 12. The Contractor shall return the site to its original condition outside of the delivery of material in agreed upon areas. B. Material and Delivery 1. Approximately 180 yd? compacted volume imported select granular material shall be used as structural fill and embankment purposes. Subbase shall be free of shale, sod, clods and stones larger than 4 inches, organic debris, trash/waste, asbestos, and other unsuitable and/or frozen material. a. Subbase shall consist of pit or quarry run rock, crushed rock, or crushed gravel and sand that is fairly well-graded between coarse and fine sizes, with approximately 25 to 65 percent passing the U.S. No. 4 sieve. It shall have less than 5 percent passing the U.S. No. 200 sieve and have a minimum of 75 percent fractured particles. Subbase shall be in accordance with AASHTO TP-61 and AASHTO T-176 b. Shall meet the 2018 standards Oregon ODOT Standards and Specifications for Construction for Subbase Aggregate Section 00641.00. c. Structural fill shall be compacted at moisture contents that are within 3 percent of the optimum moisture content as determined by ASTM International (ASTM) D 1557 (Modified Proctor). The optimum moisture content varies with gradation and shall be evaluated during construction. Fill material that is not near the optimum moisture content shall be moisture conditioned prior to compaction. 2. Approximately 360 yd? compacted volume of 1.5” Minus well graded Base Course (BASE) shall be required for installation over the Subbase. Scope of Work Page 2 of 12 1304027 QSJ RCLR Access Road Repair May 2020 a. The 1.5” Minus aggregate base course shall in accordance with the local count or State Highway Specifications and shall consist of both fine and coarse fragments of crushed stone or crushed gravel blended, or if required, with sand, finely crushed stone, crusher screenings or other similar approved materials. The completed mixture of aggregates shall be capable of being compacted into a dense and well bonded base. The crushed stone or gravel shall consist of hard, durable particles or fragments of stone, free from an excess of flat, elongated, soft or disintegrated pieces, dirt, or other objectionable matter, and shall have a percent of wear of not more than 35, at 500 revolutions, as determined by ASTM C 136. The material's gradation shall be as determined by ASTM C 117 and ASTM C 136, and meet the following gradation requirements: b. Shall meet the 2018 standards Oregon ODOT Standards and Specifications for Construction for Base Aggregate Section 02630.00. c. Compaction of Base course shall be 95% of MDD determined in accordance with AASHTO T-180/ASTM Test Method D 1557. 3. 8 CY of riprap, or ODOT Class Dso shall be required for installation of culvert erosion control sections. Well graded base course will reflect this unless cleared by FAA engineer otherwise. CRUSHED AGGREGATE GRADATIONS PERCENTAGES BY WEIGHT PASSING SQUARE MESH SIEVES Sieve Size 1.5” BASE SUBBASE 4-inch 100% 2-inch 1-1/2-inch 100% 1-inch 3/4"-inch 1/2”-inch 50-65% 3/8-inch No. 4 Sieve 40-60% 25-65% No. 8 Sieve No. 30 Sieve No. 40 Sieve 7-15% No. 200 Sieve 10% 5% Fractured Particles* MIN 75% MIN 75% Sand NLT** 30% *2 Fractured Faces **NLT: No Less Than Scope of Work Page 3 of 12 1304027 QSJ RCLR Access Road Repair May 2020 4. The Contractor shall furnish a certificate that all materials, compositions, densities and mixtures to be used in the construction of access road meet local or state requirement. Tickets shall be received from material supplier. The Contractor shall give the Resident Engineer, at the time of delivery, copies of the aggregate deliver ticket. Tickets shall include the deliver date, time dispatched, name and location of the project, name of Contractor, name of supplier, truck number, quantity and composition of job mix formula. 5. Provide approximately 5000 yd? of geotextile fabric with a minimum Mullen burst strength of 250 psi. a. Geotextile shall be laid perpendicular to the traveled way and overlap a minimum of 24”. b. Do not leave the geotextile uncovered for more than 5 days when placed. c. Stake or staple geotextile fabric after placed and overlapped with next section. 6. The Contractor shall provide and install one (1) 18” diameter corrugated metal pipe(s) measuring a length of 24’ to replace existing culvert at location(s) shown on the drawing QSJ-1304027-C003. a. Install a 3/8” sand bed underneath new culvert section. Depth of sand bed shall be a minimum of twice the corrugation of new pipe installed. 7. The Contractor shall re-dig existing gutters for clearance and provide rip-rap material as necessary. 6” cobbles shall be poorly graded with few fines and have a minimum of 80% face rigidity per ATSM 04. 8. The Contractor shall provide an additional 10 tons 1.5” Base Rock for approximately 480 linear feet to close existing gaps along the facility fence perimeter. a. Existing gap is between 3” to 4”. The maximum acceptable gap under fencing from firm ground shall be 2 inches. b. Gravel surface shall extend to a minimum of 4” on each side of fence. c. Remaining Base Course material shall be combined with existing site Facility surfacing material around the facility perimeter. d. Compaction of Base course shall be 95% of MDD determined in accordance with AASHTO T-180/ASTM Test Method D 1557. 9. The Contractor shall perform clearing and grubbing of vegetation in designated areas a. Do not remove trees, shrubs, and other vegetation outside areas designated. Trees damaged outside of designated areas shall be reimbursed to the landowner at no cost to the FAA. b. Grind down stumps and remove roots larger than 2 inches in diameter. c. Chip removed tree branches and with dispose clearing and grubbing waste materials off-site at state approved locations. d. Fill depressions caused by clearing and grubbing operations with satisfactory soil material unless further excavation or earthwork is indicated. Scope of Work Page 4 of 12 1304027 QSJ RCLR Access Road Repair May 2020 (1) Place fill material in horizontal layers not exceeding a loose depth of 8 inches, and compact each layer to a density equal to adjacent original ground. e. Perform permanent seeding erosion control methods, per ODOT Erosion Control Manual 1.2 APPLICABLE DOCUMENTS A. Applicable Documents - All FAA, Federal, and industrial codes or standards, specifications, and contract drawings referenced in this and the following divisions form a part of this specification and are applicable only to the extent they were used as a basis of this project. All references to codes, standards, specifications, and construction drawings refer to the latest editions (and any supplements) in effect on the date of the contract. B. Applicable Publications - The publications listed below form a part of this specification to the extent referenced. The publications are referenced to in the text by basic designation … Show All