AG-64R4-S-14-0010_-_Wolf_Mountain_and_McDaniel_Road_Reconditioning_-_Special_Contract_Requirements.pdf

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EFL ERFO MTNF 2011(1)

Various Sites

SPECIAL CONTRACT REQUIREMENTS

The following Special Contract Requirements amend and supplement the Standard Specifications for Construction of Roads and Bridges, on Federal Highway Projects (FP-03) U.S. Customary Version, U.S. Department of Transportation, Federal Highway Administration.

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Section 101. – TERMS, FORMAT, AND DEFINITIONS

101.03 Abbreviations.

US Customary symbols.

A — ampere electric current

ac. — acre Area BTU — British Thermal Unit Energy

cu. in. or in3 — cubic inches Volume

cu. ft., cf, ft3 or CUFT — cubic feet Volume

cu. yd., cy, yd3 or CUYD — cubic yards Volume D — day Time deg. or º — degree plane angle Fc — foot-candles luminous intensity

fl. oz. — fluid ounces Volume

ft. or ' — foot or feet Length gal. or GAL — gallon Volume H — Henry Inductance

hr. or HR — hour Time Hz — hertz (s-1) Frequency

in. or " inch or inches Length K — kelvin Temperature lb or LB, lbs — pound, pounds Mass Lbf — pound-force Force lnft or LNFT linear foot Length

mi. — miles Length min. or m — minute Time min. or ' — minute plane angle ºF — degrees Fahrenheit Temperature

oz. — ounces Mass Psi — pounds/square inch Pressure Q — cubic feet/second flow rate sec. or s — second Time sec. or " — second plane angle

sq. in. or in2 — square inches Area

sq. ft., sf, ft2 or SQFT — square feet Area

sq. yd., sy, yd2 or SQYD — square yards Area Sta. — station Length T — short ton (2000 lbs) Mass V — volt (W/A) electric potential W — watt (J/s) Power YD — yard or yards Length Ω — ohm V/A electric resistance

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Various Sites

101.04 Definitions.

Roadway Prism - Delete the text and substitute the following:

Roadway Prism – The volume defined by the area between the original terrain cross-section and the final design cross-section multiplied by the horizontal distance between the centroids (geometric center) of the area.

Section 105. - CONTROL OF MATERIAL

105.01 Source of Supply and Quality Requirements. Add the following:

Provide quality verification for materials by certification or by load ticket.

105.04 Storing and Handling Material. Add the following after the third sentence of the second paragraph:

For Contractor-located, non-commercial staging, storing, and material handling areas, secure environmental clearances according to Subsection 107.10.

Section 107. - LEGAL RELATIONS AND RESPONSIBILITY TO THE PUBLIC

107.01 Laws to be Observed. Add the following:

“Good Housekeeping” Practices and Requirements.

Locate machinery servicing and refueling areas away from streambeds and washes to reduce the possibility and minimize the impacts of accidental spills or discharges.

Where the Contractor’s working area encroaches on a running or intermittent stream, construct and maintain adequate barriers to prevent the discharge of any contaminants into the stream.

Fording of running streams with construction equipment will not be permitted. Obtain approval from the CO to use temporary bridges or other structures whenever crossings are necessary.

Immediately clear ephemeral drainages, intermittent and perennial streams, lakes and reservoirs of all work items, debris or other obstructions inadvertently placed thereby or resulting from construction operations.

Section 401 and 404 of the Clean Water Act.

Comply with the terms and conditions of the 404 permit and with the terms and conditions, if any, specified in the 401certification. Comply with the terms and conditions of any permits that are issued for the performance of work within the jurisdictional waters of the U.S.

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Various Sites

107.02 Protection and Restoration of Property and Landscape. Delete the sixth paragraph and substitute the following:

Before beginning work in an area, contact the local Utility Locator Service, at the phone number shown in the plans, to have all utilities located. Protect utilities from construction operations.

Cooperate with utility owners to expedite the relocation or adjustment of their utilities to minimize interruption of service, duplication of work, and delays.

107.03 Bulletin Board. Delete the text and substitute the following:

107.03 Bulletin Board. Furnish a weatherproof bulletin board of suitable size and construction for continuous display of posters and other information required by the contract. Erect and maintain the bulletin board at a conspicuously accessible location on the project and remove and dispose of it after final acceptance.

Display each of the following documents on the bulletin board:

(a) “Equal Opportunity” poster, according to FAR Clause 52.222-26 Equal Opportunity;

(b) “Notice” that the project is subject to Title 18, U.S. Criminal Code, Section 1020, FHWA Form 1022;

(c) “Notice to Employees” poster, WH-1321, regarding proper pay;

(d) “Right to Safe and Healthy Workplace” poster, according to Title 29, Code of Federal Regulations, Part 1903;

(e) “General Wage Decision” contained in the contract;

(f) Company equal employment opportunity policy, according to Title 41, Code of Federal Regulation, Part 60-741.44;

(g) Emergency phone numbers (In areas where 911 is not available), according to Title 29, Code of Federal Regulation, Part 1926.50(f);

(h) “Family and Medical Leave Act” poster, WH-1420, according to Title 29, Code of Federal Regulation, Part 825.300(a);

(i) “Employee Polygraph Protection Act” poster, WH 1462; and

(j) Employee Rights Under The National Labor Relations Act, according to Executive Order 13496.

107.10 Environmental Protection. Delete the text and substitute the following:

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Various Sites

107.10 Environmental Protection. Submit a Spill Prevention, Control, and Countermeasure (SPCC) plan for sites that meet the requirements of 40 CFR Part 112. Refer to EPA checklist at the following web address:

http://www.epa.gov/emergencies/docs/oil/spcc/guidance/G_Bulk_Storage_Checklist.pdf

Submit and follow the Hazardous Spill Plan when an SPCC plan is not required. Develop a plan describing what actions will be taken in case of a spill and incorporate preventative measures to be implemented (such as the placement of refueling facilities and the storage and handling of materials).

Submission of either plan must be made at least 2 days before beginning work.

(a) Spills of Petroleum Products or Hazardous Materials. Properly clean up, mitigate, and remedy, if necessary, all spills of petroleum products, hazardous materials, or other chemical or biological products released from construction, fleet, or other support vehicles, or stationary sources. Respond in accordance with federal, state, and local regulations.

Immediately report to the CO any spill of petroleum products or a hazardous material. Report the spill to the appropriate federal, state, and local authorities, if the spill is a reportable quantity.

(b) Water pollution. Do not operate mechanized equipment or discharge or otherwise place any material within the wetted perimeter of any waters of the U.S. within the scope of the Clean Water Act (33 USC § 1251 et seq.). This includes wetlands unless authorized by a permit issued by the U.S. Army Corps of Engineers according to 33 USC § 1344, and, if required, by any State agency having jurisdiction over the discharge of material into the waters of the U.S. In the event of an unauthorized discharge:

(1) Immediately prevent further contamination;

(2) Immediately notify appropriate authorities; and

(3) Mitigate damages as required.

Comply with the terms and conditions of any permits that are issued for the performance of work within the wetted perimeter of the waters of the U.S.

Separate work areas, including material sources, by the use of a dike or other suitable barrier that prevents sediment, petroleum products, chemicals, or other liquid or solid material from entering the waters of the U.S. Use care in constructing and removing the barriers to avoid any discharge of material into, or the siltation of, the water. Remove and properly dispose of the sediment or other material collected by the barrier.

(c) Vehicles and equipment. All vehicles and equipment entering the project area must be clean of noxious weeds and free from oil leaks and are subject to inspection. Wash all construction equipment to thoroughly remove all dirt, plant, and other foreign material prior to entering the

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Various Sites project. Particular attention must be shown to the under carriage and any surface where soil containing exotic seeds may exist. These efforts are critical to prevent the introduction and establishment of non-native plant species into the project area. Make arrangements for the CO to inspect each piece of equipment before entering the project. The CO will maintain records of inspections. Equipment found operating on the project that has not been inspected, or has oil leaks will be shut down and subject to citation.

In general, when gasoline, diesel fuel, antifreeze, hydraulic fluid or any other chemical contained within the vehicle is released to the pavement or ground, proper corrective, clean-up, and safety actions specified in the SWPPP must be immediately implemented. All vehicles with load rating of 2 tons or greater should carry, at minimum, enough absorbent materials to effectively immobilize the total volume of fluids contained within the vehicle.

Repair oil leaks immediately on discovery. Do not use equipment that is leaking. Have oil pans and absorbent material in place prior to beginning repair work. Have the “on scene” capability of catching and absorbing leaks or spillages of petroleum products including antifreeze from breakdowns or repair actions with approved absorbent materials. Keep a supply of acceptable absorbent materials at the job site in the event of spills. Sand or soil are not approved absorbent materials.

Use oil pans and absorbent materials to prevent leaks, spills and draining petroleum fluids from falling onto bare ground and paved surfaces during servicing of equipment. Dig up soils contaminated with such fluids, place in appropriate safety containers, and dispose of according to state and/or federal regulations.

(d) Environmental Clearances.

(1) Contractor-Selected, Non-Commercial Areas. Contractor-selected, non-commercial areas include, but are not limited to, material sources, disposal sites, waste areas, haul roads, and staging areas. (A commercial source is a current operating concern, which has in the recent past provided same-type materials or services). These requirements do not apply for areas identified by the Government as having previously received clearance.

Prior to construction activities in contractor-selected, non-commercial areas, provide the following to the CO and the FHWA Environmental section (12300 West Dakota Avenue, Lakewood, CO 80228/Fax 720-963-3610):

(a) A report with documentation, according to the Secretary of the Interior’s Standards and Guidelines for Archeology and Historic Preservation, to determine if prehistoric or historic buildings, structures, sites, objects, or districts listed or eligible for listing in the National Register of Historic Places (NRHP) are present and if they will be affected by the proposed activity. Include information identifying the location, total land area, and type of activity proposed. The FHWA will review this documentation. The FHWA will coordinate with the State Historic Preservation Officer (SHPO) and other parties, which will require the following time frames:

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(1) Coordination on a “no effect” determination may require 30 days or longer.

(2) Coordination on eligibility and affects may require 45 days or longer.

(3) Coordination on mitigation of adverse effects may require 60 days or longer.

(b) Written documentation that such activities will not affect any “Waters of the U.S.” as defined by the U.S. Army Corps of Engineers. Provide documentation by an individual capable of performing wetland delineations according to the 1987 Corps of Engineers’ manual.

Documentation of effects to wetlands or other Waters of the U.S. will be submitted to the CO and to the FHWA Environmental section. If wetlands are affected, coordination with the Corps of Engineers may require 45 days or longer.

(c) Written documentation that such activities will not affect any species protected under the Endangered Species Act (ESA). Provide documentation prepared by a biological specialist. The written documentation will include a “no effect,” a “may affect-is not likely to adversely affect,” or a “may affect-is likely to adversely affect,” determination according to Section 7 of the Endangered Species Act. Submit the documentation to the CO and the FHWA Environmental section. If the determination is “may affect-is not likely to adversely affect” or “may affect-is likely to adversely affect,” the FHWA will coordinate with the U.S. Fish and Wildlife Service (FWS), which will require the following time frames:

(1) “May affect-is not likely to adversely affect” may require 45 days or longer.

(2) “May affect-is likely to adversely affect” may require 150 days or longer.

Contract time will not be increased due to the submittal and approval process for the above three items.

107.11 Protection of Forests, Parks, and Public Lands. Add the following:

The CO will order the suspension of burning and other operations when directed to do so by the Forest Service. No adjustment in the contract completion date will be made for partial or total suspensions of burning operations.

Section 108. - PROSECUTION AND PROGRESS

108.01 Commencement, Prosecution, and Completion of Work: Add the following:

Limit operations as follows:

Remove trees that are 9 inches (Diameter at Breast Height) or greater only between November 1 and March 31 to prevent disturbing bats during the maternity season. If tree removals occur between April 1 and October 31, coordinate appropriate measures with

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Various Sites the U.S Forest Service - Mark Twain National Forest prior to removal to determine the impact to bat habitat. Do not apply pesticides, herbicides, or fertilizers.

Conserve and retain potential bat habitat when possible:

o Do not remove dead trees greater than 12 inches in diameter.

o Retain live shagbark hickories

Perform no work except to maintain traffic control devices, erosion control devices, the roadway driving surface, and to control dust during the listed Federal holidays and surrounding days:

● Memorial Day Weekend: 12:00 Noon Friday to 6:00 am Tuesday.

● Independence Day: 12:00 Noon July 3 to 6:00 am July 5.

If July 4 falls on a weekend, Friday, or Monday, do not work the weekend.

● Labor Day Weekend: 12:00 Noon Friday to 6:00 am Tuesday.

● Thanksgiving: 12:00 Noon Wednesday to 6:00 am Monday.

● Christmas/New Year’s Holiday: 12:00 Noon December 23 to 6:00 am January 2.

If December 23 or January 1 falls on a Monday, do not work the adjacent weekend and do not work on December 23. If January 1 falls on a Friday, do not work the weekend.

Schedule at least 2 non-work days out of every 14 calendar days. The selected non-work days do not need to be consecutive, but they must be scheduled. Provide at least 2 weeks notice before changing the scheduled days off.

Exemptions to scheduled days off may be granted by written approval from the CO for specific project operations and/or for periods of limited duration.

Add the following:

A Notice to Proceed must be issued before commencement of any work. The count of contract time will begin upon issuance of the Notice to Proceed and shall run continuously until final construction completion.

Section 151. - MOBILIZATION

151.03 Payment. Delete subsections (b) and (c) and substitute the following:

(b) When 5 percent of the original contract amount is earned from bid items (not including mobilization), 50 percent of the mobilization item, or 5 percent of the original contract amount, whichever is less, will be paid.

(c) When 10 percent of the original contract amount is earned from bid items (not including mobilization), 100 percent of the mobilization item, or 10 percent of the original contract amount, whichever is less, will be paid.

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Section 152. - CONSTRUCTION SURVEY AND STAKING

Construction Requirements

152.02 General. Add the following:

Furnish a practicable schedule of staking activities with the construction schedule submitted according to Section 155. Include the dates and sequence of staking requirements.

152.03 Survey and Staking Requirements.

(g) Culverts. Delete the first paragraph and substitute the following:

Verify, in the field, the approximate location of each individual culvert with the CO prior to surveying, designing, and staking culverts. Use the “Guide for Designing and Staking Culvert in the Field”, dated January 9, 1996, issued by the U.S. Department of Transportation, Central Federal Lands Highway Division, Lakewood, CO, as a guide to the work in this section.

Add the following:

(8) When the field design has been approved, set culvert survey stakes, reference stakes, and stake inlet and outlet ditches to make the culvert, including end treatments (e.g., drop inlets) functional.

(9) Adjust slope stakes to provide for catch basins (and transitions into and out of catch basins) which correspond to the final culvert location and design. If the culvert was moved from location shown in the plans, review the slope stakes in the vicinity of the plan location and adjust the slope stakes to remove the planned catch basin.

(l) Miscellaneous survey and staking. Delete the text and substitute the following:

Perform all surveying, staking, recording of data, and calculations necessary for establishing the layout, control, and measurement required to construct the project. Perform the work in such a manner as to ensure the contract work is constructed in the proper location and to the required tolerances. Where staking increments are not identified, propose appropriate staking increments to the CO for acceptance.

Measurement

152.05 Delete the fourth paragraph and substitute the following:

Do not measure miscellaneous survey and staking.

Section 156. - PUBLIC TRAFFIC

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156.03 Accommodating Traffic During Work. Delete the first paragraph and substitute the following:

Accommodate traffic according to the contract traffic control plan, MUTCD, Section 635, and this Section. An alternate traffic control plan may be submitted for acceptance according to Subsection 104.03. Submit alternate traffic control plans at least 5 days before intended use.

156.04 Maintaining Roadways During Work.

(a) Add the following:

Do not construct diversions outside of the clearing limits or use alternate route detours without the approval of the CO.

156.06 Limitations on Construction Operations.

(b) Delete the text and substitute the following:

For shoulder drop-offs 3 inches or less, provide "Low Shoulder" warning signs. For shoulder drop-offs in excess of 3 inches, provide a 1V:3H fillet with "Shoulder Drop-Off" warning signs.

Complete the construction of shoulders adjacent to traffic lanes to the same elevation within 14 days.

(c) Delete the text

(i) Delete the text and substitute the following:

Road closures are permitted for the duration of the work.

RT 3213 may be closed from M.P. 0.0 to M.P. 5.5.

RT 372 may be closed at the intersection of McDaniel Rd and Sonora Ln.

Section 157. - SOIL EROSION CONTROL

157.03 General. Delete the Subsection and substitute the following:

157.03 General. Provide permanent and temporary erosion control measures to minimize erosion and sedimentation during and after construction according to the contract erosion control plan, contract permits, Section 107, and this Section. Contract permits amend the requirements of this Section. Do not modify the type, size, or location of any control or practice without approval.

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Various Sites Standard erosion and sediment control devices are provided in the contract. Detail site-specific measures for controlling erosion and sediment as part of the Erosion Control Plan (ECP).

Submit the ECP to the CO for acceptance prior to implementation. Provide working drawings and associated data. Allow 7 days for acceptance of the drawings or a return for corrections. Do not begin any ground disturbing work until the plan has been accepted. Include all data and plan updates pertaining to erosion and sediment control in the ECP for the project. Include the following in the detailed design:

(a) Address contractual requirements for storm water runoff permits, environmental commitments and other permit requirements here or in Subsection 107.01 and 107.10.

(b) Location of each proposed erosion or sediment control measure.

(c) Type of each erosion or sediment control measure. If standard measures provided in the contract do not fit the field conditions, propose alternatives at least 30 days prior to installation.

(d) Quantities of proposed temporary erosion and sediment control devices to be implemented during construction.

(e) A schedule detailing coordination of erosion and sediment control measures with the various construction operations or stages. Include the furnishing, installation, maintaining, and removing of temporary devices and the installation of permanent erosion control features.

(f) A schedule outlining the proposed schedule of clearing and grubbing, excavation, embankment, and culvert operations such that the area of disturbed or erodible material is minimized. Schedule the work such that temporary and permanent erosion measures can be incorporated at the earliest practical time.

(g) Construction methods used in various items of work to minimize erosion.

When temporary erosion or sediment control measures are required due to the Contractor's negligence, carelessness, or failure to install permanent controls as part of the work in a timely manner, provide temporary measures at no cost to the Government.

When erosion control measures are not functioning as intended, immediately take corrective action.

At the preconstruction conference, designate in writing an Erosion Control Supervisor (ECS) who is qualified and responsible for implementing the requirements of this Section. Include a resume with previous erosion and sediment control experience and education.

157.12 Inspection and Reporting. Add the following:

Inspect all disturbed and temporarily stabilized areas of the project as required by the Construction General Permit (CGP). Provide copies of reports of all inspections and monitoring

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Various Sites performed to the CO within 24 hours of the inspection. Refer to the CGP for current monitoring and inspection requirements.

Monitor the turbidity of waters adjacent to the project daily during the work shift. Take turbidity measurements in accordance with permits. Additional measurements may be required as directed by the CO. If the measurements show an increase of 10 NTU or more, immediately suspend operations in the vicinity of the problem area and modify the erosion and sediment control measures to eliminate the cause of the high turbidity. Include turbidity readings, locations, time, date, and actions taken, if any, in inspection reports. Also provide documentation of meter calibration.

157.14 Acceptance. Add the following:

Soil erosion control will be evaluated under Subsection 106.02 based on the demonstrated ability of the erosion and sediment control measures to result in minimal soil erosion, sedimentation and siltation, and turbidity increases within or adjacent to the project limits. Failure to maintain devices properly and in a timely manner may result in non-compliance and devices will be rejected until they are brought into compliance.

Section 204. - EXCAVATION AND EMBANKMENT

204.14 Disposal of Unsuitable or Excess Material. Add the following:

Secure environmental clearances according to Subsection 107.10.

204.16

(a) Roadway Excavation.

(1) Include the following volumes in roadway excavation:

(e) Delete the text and substitute the following:

Conserved topsoil stripped from cuts.

(h) Delete the text and substitute the following:

Conserved material taken from stockpiles and used in Section 204 work except topsoil measured under Section 624. Only materials required to be conserved by the CO are eligible for measurement under this item.

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Various Sites

(2) Do not include the following in roadway excavation: Add the following:

(m) Conserved topsoil stripped from fills.

Section 251. – RIPRAP

251.07 Acceptance. Delete the second sentence and substitute the following:

Riprap will be evaluated under Subsections 106.02 and 106.04.

Verify that riprap delivered to the placement site meets the applicable class size specified in Table 705-1 through sampling as specified in Table 251-1 and testing the size characteristic as follows:

The intermediate dimension of the largest accessible rock will be measured and must be greater than the upper limit of the D85 size range specified in Table 705-1 for the applicable riprap class. The intermediate dimension is defined as the shortest, straight-line distance from one side of the rock to the other on the maximum projection plane (plane of rock with the largest projected surface area).

Verify that production riprap meets the applicable class gradation specified in Table 705-1 through sampling and testing the gradation characteristic as specified in Table 251-1. Provide the contracting officer a minimum 7-day advance notice of the sampling and testing schedule and location.

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Table 251-1 Sampling and Testing Requirements. Delete Table 251-1 and substitute the following:

Table 251-1 Sampling and Testing Requirements

Material or Product

Type of Acceptance (Subsection)

Property or Characteristic

Test Methods or Specifications

Sampling Frequency

Point of Sampling

Split Sample

Reporting Time

Riprap Rock source quality (705.02)

Measured and tested for conformance

(106.04)

Apparent specific gravity and absorption

Sodium sulfate soundness

LA abrasion

Gradation

AASHTO T 85

AASHTO T 104

AASHTO T 96

FLH T 521-08

1 per material type

Source of material

Production stockpile

Yes

No

Before using in work

Riprap Rock (placement)

Measured and tested for conformance (106.04)

Size Subsection 251.07 1 per 50 cubic yards From the windrow or roadbed after processing.

No

Before using in work

Grout Measured and tested for conformance (106.04)

Making test specimens

Compressive strength

AASHTO T 23

and

ASHTO T 22

1 per mix design

Yes, when requested

Before using in work

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Section 253. - GABIONS AND REVET MATTRESSES

Description

253.01 Add the following:

This work also includes the installation of articulated concrete block revetment mat.

Material

Cellular Concrete Block 725.10 Revetment Cable 709.02 Geotextile type IV 714.01

253.03 General. Delete the first sentence and substitute the following:

Survey according to Section 152 and verify the limits of the structure.

253.05 Structure Erection. Add the following to the first paragraph:

For revetment mattresses, grade the foundation for a width equal to the width of the revetment mattress plus 2 feet. Where revetment mattresses are set on rocky foundations, place 6 inches of select granular backfill under the revetment mat.

253.08 Revet Mattresses. Add the following:

(a) Design

Prefabricate articulated concrete block revetment mat as an assembly of concrete blocks, with specific hydraulic capacities, laced with revetment cables. Articulated concrete block revetment mat may be assembled on-site.

Stagger individual units in the system and interlock for enhanced stability as shown in the plans. The open cell units have two (2) vertical openings of rectangular cross section with sufficient wall thickness to resist breakage during shipping and installation. Extend parallel strands of cable through two (2) cable ducts in each block allowing for longitudinal binding of the units within the mat and subsequent ability of the blocks to move freely along the cable. Offset each row of units laterally by one-half of a block width from the adjacent row so that any given block is cabled to four other blocks (two in the row above and two in the row below).

Secure all blocks in any given mat with a minimum of two (2) cables each.

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Various Sites Incorporate interlocking surfaces of each block that minimize lateral displacement of the blocks within the mats when lifted by the longitudinal revetment cables.

Interlocking surfaces must not protrude beyond the perimeter of the blocks to such an extent that they reduce the flexibility or articulation capability of the cellular mats or become damaged or broken when the mats are lifted during shipment or placement.

Once in place the interlocking surfaces of the mats shall minimize the lateral displacement of the blocks even if the cables should become damaged or removed. A minimum of 18°between any given row or column of blocks in the uplift direction and a minimum of 45° in the downward direction must be maintained in the mats.

Insert cables into the mats allowing for lifting loops at one end of the mat with the corresponding cable ends spliced together to form a lifting loop at the other end of the mat. Approved appropriate sleeves will be used to splice the lifting loop. Insert cables after sufficient time has been allowed for the concrete to complete the curing process.

Place the articulated concrete block revetment mat on the filter fabric but do not affix the filter fabric to the mattress.

(b) Physical Requirements

PHYSICAL REQUIREMENTS

Compressive Strength Net Area Water Absorption

Min. p.s.i. Mx. Lb/ft3

Avg. of 3 units Individual Unit Avg. of 3 units Individual Unit

4,000 3,500 9.1 11.7

(c) Grading

Grade the slope to a smooth plane surface to achieve good contact between the slope face and the geotextile, and between the geotextile and the entire bottom surface of the articulated concrete blocks. Remove or re-grade slope from all deformities, roots, grade stakes, and stones which project normal to the local slope face. Place compacted homogenous material to fill all holes, “pockmarks”, slope board teeth marks, footprints, or other voids greater than 1.0 inch in depth normal to the local slope face. Place compacted homogenous material to fill all grooves or depressions greater than 0.5 inches in depth normal to the local slope face with a dimension exceeding 1.0 foot in any direction. Uniformly compact the slope and slope face as directed by CO.

Excavate and prepare anchor trenches, flanking trenches, and toe trenches or aprons according to the plans. Uniformly grade the anchor trench hinge-point at the top of the slope to prevent dips or bumps greater than 0.5 inches over or under the local grade. Uniformly grade the anchor trench hinge-point to the width that allows good

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Various Sites contact between the articulated concrete blocks and the underlying grade at the hinge-point.

Obtain approval of th3e subgrade from the CO prior to placement of filter fabric and articulated concrete blocks.

(d) Placement

Place the articulated concrete blocks on top on the subgrade. No individual bock within the plane of placed articulated concrete blocks shall protrude more than one-half inch or as otherwise specified by the CO.

If placed as a large mattress, use a spreader bar or other approved device to lift and place the mats in the proper position with a crane or other approved equipment. Place mats side-by-side and/or end-to-end so that they abut one another.

The mats shall be laid from the downstream end of project to the upstream end, so the geotextile joints are shingled to direct flow over the joint and to prevent undermining.

Intimate contact with the subsurface is critical to the systems performance in the field.

The gaps between each mat shall not be greater than 2”; or else the gap must be closed using a grout mixture. The outside edges of the mat system shall be entrenched and buried at least one block into the ground. Compacted granular fill or grout may be used to fill the entrenched edges.

Voids in the revetment mattress will be filled with loose roadway aggregate.

Backfill termination trenches flush with the top of the blocks.

253.09 Acceptance. Delete the second paragraph and add the following:

Material for gabion structures and revet mattresses will be evaluated under Subsections 106.02, 106.03, and the following:

(a) Acceptance of articulated concrete block revetment mat must include documented hydraulic performance characteristics that are derived from tests under controlled flow conditions. Testing guidelines should conform to U.S. Federal Highway Administration and U.S. Bureau of Reclamation Testing Protocol as documented in “Minimizing Embankment Damage During Overtopping Flow”, Repot NO. FHWA- RD-88-181 and all hydraulic performance testing shall be performed in a 2H:1V flume.

(b) All units shall be sound and free of defects that would interfere with either the proper placement of the unit or impair the performance of the system. Surface cracks incidental to the usual methods of manufacture, or surface chipping resulting from customary methods of handling in shipment and delivery, shall not be deemed ground

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Various Sites for rejection. Cracks exceeding 0.25 inches in width and/or 1.0 inch in depth shall be deemed grounds for rejection. Chipping resulting in a weight loss exceeding 10% of the average weight of a concrete unit shall be deemed grounds for rejection

Section 308. – MINOR CRUSHED AGGREGATE

308.05 Compacting and Finishing Crushed Aggregate. Delete the Subsection and substitute the following:

(a) Roadway aggregate. Compact using the methods below, specified in the Schedule of Items.

(1) Method 1. Compact the aggregate by operating compaction equipment over the total width until visible deformation ceases. A minimum of three complete roller passes shall be made at a moisture content suitable for compaction.

(b) Bedding and backfill aggregate. Compact in 6 inch lifts by using a Forest Service approved mechanical compactor until no visible deformation is observed over the entire area of aggregate.

Section 602. - CULVERTS AND DRAINS

602.01 Add the following:

This work also consists of the clearing and grubbing, conservation and placement of topsoil, and earthwork required to construct the approaches and roadway over the culvert.

Acceptance

602.08 Acceptance. Delete the Subsection and substitute the following:

Material for culverts will be evaluated by visual inspection and certification.

Installation of culverts will be evaluated by visual inspection and measured or tested conformance.

Excavation and backfill will be evaluated under Section 209.

602.09 Add the following:

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Various Sites Do not measure clearing and grubbing, topsoil conservation and placement, or earthwork associated with approaches to and roadway over the culvert for payment.

Section 623. – GENERAL LABOR

Delete the text of this Section and substitute the following:

623.01 This work consists of furnishing workers and hand tools for construction work, survey crews, and/or furnishing qualified personnel to perform technical work ordered by the CO and not otherwise provided for under the contract.

623.02 Workers and Equipment. Furnish competent workers and appropriate hand tools for the work.

Obtain approval of the length of a workday and workweek before beginning the work. Keep daily records of the number of hours worked. Submit the records along with certified copies of the payroll.

623.03 Surveying Services. Furnish personnel, equipment, and material that conform to the requirements of Subsection 152.01. Survey according to Section 152.

Survey and establish controls within the tolerances shown in Table 152-1, or within other tolerances as established by the CO.

Prepare field notes in an approved format. Furnish calculations. All field notes, supporting documentation, and calculations become the property of the Government upon completion of the work.

623.04 Office Technical Services. Furnish qualified engineering personnel experienced in highway construction and design, capable of performing in a timely and accurate manner.

Provide personnel with a minimum of NICET Level II certification in highway design and construction, or State (SHA) or industry certification-related design and construction equivalent to their intended responsibilities. Personnel with 2 years or more of recent job experience in the type of highway design and construction provided for under the contract may be used in lieu of certifications. Provide the names and relevant experience of all personnel. Furnish supporting tools and equipment (e.g., calculator, computer, and software, and appropriate and commonly-used drafting tools for the assigned task).

All calculations, notes, and supporting documentation become the property of the government upon completion of the work.

623.05 Acceptance. Additional surveying services will be evaluated under Section 152.

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Various Sites Hired technical services will be evaluated based on visual inspection and measured or tested conformance.

Section 635. - TEMPORARY TRAFFIC CONTROL

635.07 Construction Signs. Delete the Subsection and substitute the following:

Use type III, IV, VIII, IX, or XI retroreflective sheeting. For roll-up signs, use type VI retroreflective sheeting. Remove or completely cover all unnecessary signs with an acceptable material. Acceptable materials include plywood, hardboard, sheet metal, aluminum, corrugated polypropylene board, or rigid plastic, durable enough to resist deterioration due to weathering and atmospheric conditions for the duration of the project. Do not use adhesives glues, tapes, or mechanical fasteners that mar the face of the panel to be masked.

Provide the same type of sheeting on all post-mounted construction signs that pertain to the project.

Use crashworthy posts within the traversable area adjacent to traffic. Install posts according to Section 633.

635.09 Flaggers. Delete the Subsection and substitute the following:

Use flaggers certified by the American Traffic Safety Services Association, the National Safety Council, the International Municipal Signal Association, a state agency, or other acceptable organization. Perform the work described under MUTCD Part 6. Use type III, IV, VIII, IX, or XI retroreflective sheeting on the “STOP” side of the flagger paddle. Use fluorescent retroreflective sheeting on the “SLOW” side of the flagger paddle.

Section 703. – AGGREGATE

703.06 Crushed Aggregate. Add the following to the end of the paragraph:

When aggregate is used as a surface course, furnish an aggregate with a Plasticity Index conforming to Table 703-3a.

Table 703-3a Surface Course Gradation and Plasticity Index

Sieve Size

Percent by Mass Passing

Designated Sieve (AASHTO T 27 and T

11) ¾ inch 100 No. 4 41-71

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Various Sites No. 40 12-28 No. 200 5-20

Plasticity Index (PI) 4-12

Section 705. - ROCK

705.01 Gabion and Revet Mattress Rock. Add the following:

(d) Los Angeles abrasion, AASHTO T 96 50% max.

705.02 Riprap Rock. Delete the text and substitute the following:

Furnish hard, durable, angular rock that is resistant to weathering and water action and free of organic or other unsuitable material. Angular rock is characterized by sharp, clean edges at the intersections of relatively flat surfaces. Furnish rock with width and thickness of individual rock at least one-third its length (dimension of longest axis). Do not use shale, rock with shale seams, or other fissile or fissured rock that may break into smaller pieces in the process of handling and placing. Conform to the following:

(a) Apparent specific gravity, AASHTO T 85 2.40 min.

(b) Absorption, AASHTO T 85 4.0% max.

(c) Sodium Sulfate Soundness Loss (5 cycles), 12% max.

AASHTO T 104

(d) Los Angeles abrasion, AASHTO T 96 50% max.

(e) Riprap class Table 705-1

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Various Sites Table 705-1

Gradation Requirements for Riprap (1)

Class

Percent of Rock Equal or

Smaller by Count, Dx

Range of Intermediate Dimension,(2)

(inches)

Range of Rock Weight,(3) (pounds)

100 12.0 140

85 8.0 – 9.5 39 – 64

50 5.5 – 7.0 15 – 27

15 3.5 – 5.0 4 – 12

100 18.0 470

85 11.5 – 14.0 130 – 220

50 8.5 – 10.5 51 – 90

15 5.5 – 8.0 13 – 39

100 24.0 1100

85 15.5 – 18.5 310 – 510

50 11.5 – 14.0 120 – 210

15 7.5 – 10.5 32 – 93

100 30.0 2200

85 19.5 – 23.0 600 – 1000

50 14.5 – 17.5 240 – 420

15 9.5 – 13.0 62 – 180

100 36.0 3800

85 23.5 – 27.5 1050 – 1750

50 17.0 – 20.5 410 – 720

15 9.5 – 13.0 110 – 310

100 42.0 6000

85 27.5 – 32.5 1650 – 2800

50 20.0 – 24.0 650 – 1150

15 13.0 – 18.5 170 – 500

100 48.0 9000

85 31.0 – 37.0 2500 – 4100

50 23.0 – 28.0 950 – 1700

15 15.0 – 21.0 260 – 740

100 60.0 17,600

85 39.0 – 46.0 4800 – 8000

50 29.0 – 35.0 1900 – 3300

15 19.0 – 26.0 500 – 1450

100 72.0 30,400

85 47.0 – 56.0 8300 – 13,900

50 34.0 – 42.0 3300 – 5800

15 22.0 – 32.0 860 – 2500

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Various Sites

100 84.0 48,200

85 55.0 – 65.0 13,200 – 22,000

50 40.0 – 49.0 5200 – 9200

15 26.0 – 37.0 1350 – 4000

(1) Include spalls and rock fragments to provide a stable dense mass.

(2) Intermediate dimension measured as the shortest straight-line distance from one side of the rock or rock particle to the other on the maximum projection plane (plane of rock or rock particle with the largest projected surface area).

(3) Weights based on a specific gravity of 2.65.

Section 709. – REINFORCING STEEL AND WIRE ROPE

709.02 Wire Rope or Wire Cable. Add the following:

(a) Galvanized Steel Revetment Cable and Fittings. Furnish revetment cable constructed of preformed galvanized aircraft cable. Fabricate cables from individual wires and strands that have been formed during the manufacture into the shape they have in finished cable.

Construct cable with a core of seven (7) wires wrapped within seven (7) or nineteen (19) wire strands. The revetment cable shall have the following physical properties:

Section 725. - MISCELLANEOUS MATERIAL

725.10 Cellular Concrete Blocks. Delete the first sentence and add the following:

Conform to ASTM C 936 or C 1319 and ASTM D6684-04.

Block Weight Block Size Open Area % Lbs. Lbs./ft2 Length, in. Width, in. Height, in.

31‐36 32‐37 13.0 11.6 4.75 20

725.11 Precast Concrete Units and Accessories. Delete item (g) in the list.

Galvanized Cable

Nominal Cable Dia. Type

Approx. Ave.

Strength

Weight per Length

(in.) (Lbs) (Lbs)/100 ft

1/8 7x7 1,700 2.8

3/16 7x7 3,700 6.2

1/4 7x7 6,100 10.6

5/16 7x19 9,800 17.3

3/8 7x19 14,400 24.3