Horse_Valley_Bridge_SCR _Amendment2.docx

SPECIAL CONTRACT REQUIREMENTS

FOR THE CONSTRUCTION OF

HORSE VALLEY BRIDGE CONSTRUCTION

Description of Work

The work to be done under this contract includes all labor, supervision, permits, transportation, equipment, tools, supplies, and materials necessary to construct a single-lane bridge as shown in the Plans and detailed in this Special Contract Requirements. This work includes installing a micropile foundation with concrete abutments, furnishing and erecting a prefabricated structural steel bridge superstructure, construction of roadway approaches, bridge deck asphalt paving, construction of riprap slope protection, and related site work.

The work is located approximately 63 miles by road northeast of Cedar City, Utah and approximately 62 miles south of Richfield, Utah. The latitude and longitude of the bridge location are approximately 38.02836°N and 112.35735°W.

Applicable Standard Specifications

The General Requirements (Division 100) and the applicable sections of Divisions 150 through 700 of the Federal Highway Administration’s "Standard Specifications for Construction of Roads and Bridges on Federal Highway Projects, FP-14, U.S. Customary Units" of the U.S. Department of Transportation, Federal Highway Administration apply to this project as modified by these Special Contract Requirements and Contract Clauses contained in the contract. Unless otherwise noted, all reference headings in these Special Contract Requirements refer to divisions, sections, subsections, articles or paragraphs of the Standard Specifications, FP-14. The Contractor shall keep a copy of FP-14 on site during all construction for this project.

The FP-14 is a separately published book by the Federal Lands Highway. To download FP-14 or to obtain a hard copy, visit:

http://flh.fhwa.dot.gov/resources/pse/specs/fp-14.htm

PREFACE

Delete the Preface and substitute the following:

These Standard Specifications for the Construction of Roads and Bridges on Federal Highway Projects are issued primarily for constructing roads and bridges on Federal Highway projects under the direct administration of the Bureau of Land Management. These specifications are cited as "FP-14" indicating "Federal Project" Standard Specifications issued in 2014 and contain both United States Customary and Metric units of measure.

When designated in a contract, the FP-14 becomes part of the contract and binding upon all parties to the contract. Construction contracts of the Bureau of Land Management are also governed by the following regulations:

● Federal Acquisition Regulation (FAR), Title 48, Code of Federal Regulations, Chapter 1 The FAR regulations are not included in the FP-14. A complete copy of the FAR is available from the Superintendent of Documents, Congressional Sales Office, U.S. Government Printing Office, Washington, DC 20402.

U.S. Customary units of measure are used in the FP-14 as provided in the November 25, 2008 Memorandum from Jeffrey F. Paniati entitled Update on Metric Use Requirements for FHWA Documents. Metric units are noted in parentheses following the U.S. Customary Units. The references to Metric or Metric units apply only when the project or portion of the project expressly calls for Metric units of measure.

DIVISION 100

GENERAL REQUIREMENTS

Section 101. – TERMS, FORMAT AND DEFINITIONS

101.01 Meaning of Terms. Add the following:

Delete all references to the TAR (Transportation Acquisition Regulations) in the specifications.

101.03 Abbreviations. Add the following to (a) Acronyms:

AA

AAN

AAR

ABA

ACPA

ADA

AFPA

AI

AIA

ARA

AREA

ASCE

ASCII

ASLA

BLM

FTMS

GSA

IEEE

MIL

MSHA

NESC

NFPA

PCA

SAE

USFS

USGS

USPS

WCLIB

WWPI

Aluminum Association American Association of Nurserymen Association of American Railroad Architectural Barriers Act American Concrete Pavement Association Americans with Disabilities Act American Forest and Paper Association Asphalt Institute American Institute of Architects American Railway Association American Railway Engineering Association American Society of Civil Engineers American Standard Code for Information Interchange American Society of Landscape Architects Bureau of Land Management Federal Test Method Standard General Services Administration Institute of Electrical and Electronic Engineers Military Specifications Mine Safety and Health Administration National Electrical Safety Code National Forest Products Association Portland Cement Association Society of Automotive Engineers United States Forest Service United States Geological Survey United States Postal Service West Coast Lumber Inspection Bureau Western Wood Preservers Institute

Add the following to (b) U.S. Customary unit abbreviations and symbols:

hr mp ppm Hour Milepost Part Per Million

Bidder

Modify the following definitions as follows:

Contract Time – Delete this definition and substitute the following:

Period of Performance (POP) – The specified time allowed for completion of contract work.

Notice to Proceed – Delete this definition and substitute the following:

Notice to Proceed – Written notice from the Contracting Officer to the Contractor to begin the contract work.

Right-of-Way – Delete this definition and substitute the following:

Right-of-Way – A general term denoting (1) the privilege to pass over land in some particular line (including easement, lease, permit, or license to occupy, use, or traverse public or private lands), or (2) Real property necessary for the project, including roadway, buffer areas, access, and drainage areas.

Add the following:

Maximum Particle Size – The smallest sieve opening through which all particles in the material will pass.

Neat Line – A line defining the proposed or specified limits of an excavation or structure.

Pioneer Road – Temporary construction access built along the route of the project.

Protected Streamcourse – A drainage shown on the plans that requires designated mitigation measures.

Utilization Standards – The minimum size and percent soundness of trees described in the specifications to determine merchantable timber.

Section 102. – BID, AWARD, AND EXECUTION OF CONTRACT

Delete this section in its entirety.

Section 103. – SCOPE OF WORK

103.02 Disputes. Delete in its entirety.

103.03 Value Engineering. Delete in its entirety.

103.04 Contractor Records. Delete in its entirety.

Section 104. – CONTROL OF WORK

104.01 Authority of the Contracting Officer (CO). Delete in its entirety.

104.02 Authority of Inspectors. Delete in its entirety.

104.03 Specifications and Drawings.

(c) As-built drawings. Modify the first sentence to read as follows: Use one set of Contractor-provided plans exclusively for as-built drawings.

(d) Submittals. Add this section:

1. Construction Survey and Staking (Section 152)

2. Quality Control Plan (Section 153)

3. Construction Schedule and updates (Section 155)

4. Soil Erosion Control/Watershed Protection details (Section 157)

5. Riprap geotextile product data sheet (Section 207)

6. Structural backfill test results (Section 208)

7. Riprap tests results (Section 251)

8. Surface aggregate test results (Section 301)

9. Asphalt mix design and materials certification (Section 402)

10. Asphalt test results (Section 402)

11. Concrete mix design and materials certification (Section 552)

12. Concrete test results (Section 552)

13. Concrete form work drawings (Section 552)

14. Elastomeric joint seal product data sheet (Section 552)

15. Reinforcing steel order lists and bending diagrams (Section 554)

16. Superstructure design computations (Section 555)

17. Bridge superstructure drawings (Section 555)

18. Hardware and material certifications (Section 555)

19. Bearing device details (Section 564)

20. Micropile installer qualifications (Section 567)

21. Micropile submittals (Section 567)

22. Permanent traffic sign submittal (Section 633)

23. Temporary traffic control submittal (Section 635)

The Contractor shall review and approve all submittals before submission to the CO for review by the Government. Submittals shall be made sufficiently in advance of the start of the affected work to allow a minimum of 14 days for review by the Government. Additional time will be required for revisions, rejections, and resubmittals.

All submittals shall be complete and in sufficient detail to permit review of all aspects of the Contractor’s proposals. The submittals shall be submitted in such a manner that clear and legible copies can be made. Each submittal item shall be identified with the contract number, project name, and the applicable reference to the contract documents. All submittals shall be submitted electronically to the CO in PDF form.

104.04 Coordination of Contract Documents. Delete in its entirety.

Section 105. – CONTROL OF MATERIAL

105.02 Material Sources.

(a) Government-provided sources. Add the following: There is a Government owned Borrow Area located approximately 250 ft. east of the bridge location. All borrow material shall be tested for compliance with the specifications. The Contractor will be required to provide the testing certificates to the CO. The Contractor may elect to use an off-site material stockpile, however the material must be approved by the CO. If the Contractor elects to use the Government owned Borrow Area, then the Contractor shall restore the Borrow Area to natural slopes with a maximum slope of 3:1.

Riprap necessary for bridge construction will be stockpiled on-site by others.

Section 106. – ACCEPTANCE OF WORK

106.05 Statistical Evaluation of Work and Determination of Pay Factor. Delete in its entirety, including all references to Statistical Evaluation. All references to Section 106.05 shall be replaced with references to Section 106.04 Measured or Tested Conformance.

Section 107. – LEGAL RELATIONS AND RESPONSIBILITY TO THE PUBLIC

107.01 Laws to be Observed. Delete in its entirety and substitute the following:

The Contractor shall comply with Utah Code Section 73-3-29 on the relocation of natural streams.

107.02 Protection and Restoration of Property and Landscape. Add the following:

The Contractor shall take reasonable and prudent care in conducting operations to prevent unnecessary disturbance of the soil at the work site. Special care shall be taken to protect the natural surroundings and minimize vegetative disturbance. Any vegetation or ground surface damaged by the construction operations beyond the limits of the work shall be replaced or restored as nearly as possible to the original conditions by the Contractor at the Contractor’s sole expense. Areas of disturbance, including the stream banks, shall be taken back to their natural slopes.

Upon completion of the work, the Contractor shall clear the work sites of all debris and otherwise restore such areas to their previous condition as approved by the CO. The initial condition of the site will be determined by a preconstruction inspection by both the Contractor and the Government. During the inspection, any existing deficiencies shall be noted. The Contractor shall repair any additional damage that was caused by the Contractor during construction.

107.03 Bulletin Board. Delete in its entirety.

107.05 Responsibility for Damage Claims. Delete in its entirety.

107.06 Contractor’s Responsibility for Work. Delete in its entirety.

107.09 Legal Relationship of the Parties. Delete in its entirety.

107.10 Environmental Protection.

(e) Project specific Environmental Protection. Add this section:

The Contractor shall comply with all requirements contained in the Stream Alteration Permit.

Section 108. – PROSECUTION AND PROGRESS

Delete this section in its entirety.

Section 109. – MEASUREMENT AND PAYMENT

109.03 Weighing Procedures and Devices.

(c) Project weighing system. Add the following:

Manual scales may be used if approved in writing by the CO and if the method of weighing meets all other contract requirements. For aggregates weighed for payment, adjust scale weights of material to deduct the daily average moisture content in excess of 2 percentage points over optimum moisture as determined by AASHTO T 99 or the designated compaction method. If moisture determination is necessary, determine the daily average moisture content in accordance with AASHTO T 255, from not less than three representative samples of aggregate taken at random intervals each day that aggregate is being weighed.

109.06 Pricing of Adjustments. Delete in its entirety.

109.07 Eliminated Work. Delete in its entirety.

109.08 Progress Payments. Delete in its entirety.

109.09 Final Payment. Delete in its entirety.

DIVISION 150

PROJECT REQUIREMENTS

Section 151. – MOBILIZATION

Description

151.01 Add the following:

The Contractor is responsible for completing all required Federal Highway Administration (FHWA) and Utah Department of Transportation (UDOT) permits, including an encroachment permit, in order to work within the U.S. Highway 89 right-of-way. This work includes all costs associated with developing traffic control plans, obtaining the encroachment permits, and complying with all FHWA and UDOT regulations including traffic control and dust abatement. The UDOT Point of Contact is the UDOT Region 4 office in Richfield, Utah. The office number is (435) 893-4799.

The Contractor shall have a portable toilet on-site for the duration of the construction.

Payment

151.03 Delete in its entirety and substitute the following:

Construction Survey and Staking (Section 152) necessary for this contract will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 15101, Mobilization.

Contractor Sampling and Testing (Section 154) necessary for this contract will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 15101, Mobilization.

Schedules for Construction Contracts (Section 155) necessary for this contract will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 15101, Mobilization.

Soil Erosion Control (Section 157) necessary for this contract will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 15101, Mobilization.

Water used for compaction or drilling purposes necessary for this contract will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 15101, Mobilization.

Permanent Traffic Control (Section 633) necessary for this contract will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 15101, Mobilization.

Temporary Traffic Control (Section 635) necessary for this contract will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 15101, Mobilization.

Progress payments for mobilization lump sum will be paid as follows:

(a) When 5% of the original Contract amount is earned, 50% of the amount bid for the mobilization bid item will be paid.

(b) When 10% of the original Contract amount is earned, an additional 50% of the amount bid for the mobilization bid item will be paid.

(c) The total sum of all mobilization payments shall not exceed the original Contract amount bid for mobilization payments, regardless of the fact that the Contractor may have shut down the work on the project or moved equipment away from the project and then back again.

Payment will be made under:

Pay Item Pay Unit

15101 Mobilization Lump Sump

Section 152. – CONSTRUCTION SURVEY AND STAKING

Measurement

152.07 Delete in its entirety and substitute the following:

Do not measure Construction Survey and Staking for payment.

Payment

152.08 Delete in its entirety and substitute the following:

The bid schedule does not contain a pay item for Construction Survey and Staking. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 151, Pay Item 15101, Mobilization.

Section 154. – CONTRACTOR SAMPLING AND TESTING

154.07 Delete in its entirety and substitute the following:

Do not measure Contractor Sampling and Testing for payment Payment

154.08 Delete in its entirety and substitute the following:

The bid schedule does not contain a pay item for Contractor Sampling and Testing. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 151, Pay Item 15101, Mobilization.

Section 155. – SCHEDULES FOR CONSTRUCTION CONTRACTS

155.01 Add the following:

The Contractor shall use the Critical Path Method for scheduling. The Contractor shall submit an updated schedule every 30 days or when a significant change has occurred in the schedule.

Measurement

155.09 Delete in its entirety and substitute the following:

Do not measure Schedules for Construction Contracts for payment.

Payment

155.10 Delete in its entirety and substitute the following:

The bid schedule does not contain a pay item for Schedules for Construction Contracts. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 151, Pay Item 15101, Mobilization.

Section 157. – SOIL EROSION CONTROL

157.01 Delete in its entirety and substitute the following:

This work consists of furnishing, constructing, and maintaining temporary erosion and sediment control measures. The Contractor shall construct silt fence around the construction limits perimeter following Subsection 713.16. The Contractor shall construct a watershed protection system as shown on the plans consisting of 18”x18”x36” hay bales with two stakes per bale. The Contractor shall maintain the silt fence and hay bales throughout the duration of construction. The Contractor shall comply with all requirements of the Clean Water Act, Section 404 permit which is covered under the Utah Stream Alteration Permit. The Contractor shall submit the details of the soil erosion control plan to the CO for approval prior to the start of work.

This work also includes the construction of a Concrete Washout Area. The Concrete Washout Area shall be used to washout all concrete from concrete trucks and equipment used. The Concrete Washout Area shall be completely removed at the end of construction. No buried concrete washout will be allowed. The concrete washout location must be approved by the CO.

Measurement

157.17 Delete in its entirety and substitute the following:

Do not measure Soil Erosion Control for payment.

Payment

157.18 Delete in its entirety and substitute the following:

The bid schedule does not contain a pay item for Soil Erosion Control. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 151, Pay Item 15101, Mobilization.

DIVISION 200

EARTHWORK

Section 201. – CLEARING AND GRUBBING

201.08 Delete in its entirety and substitute the following:

Do not measure Clearing and Grubbing for payment.

Payment

201.09 Delete in its entirety and substitute the following:

The bid schedule does not contain a pay item for Clearing and Grubbing. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 208, Pay Item 20801, Structure Excavation.

Section 203. – REMOVAL OF STRUCTURES AND OBSTRUCTIONS

203.01 Delete in its entirety and substitute the following:

There is an assortment of scrap material in the existing concrete abutments and in the embankments around the abutments. The existing concrete abutments will be removed and disposed of by others. Additional scrap material may be found when the Contractor is performing Structure Excavation (Section 208). The Contractor shall remove and dispose of off-site in a legal manner any additional scrap material that is found while performing Structure Excavation.

Construction Requirements

203.05 Disposing of Material. Delete in its entirety and substitute the following:

Recycle or dispose of material legally off the project site. Furnish a statement documenting the nature and quantity of material processed or sold for recycling.

Measurement

203.07 Delete in its entirety and substitute the following:

Do not measure Removal of Structures and Obstructions for payment.

Payment

203.08 Add the following:

The bid schedule does not contain a pay item for Removal of Structures and Obstructions. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 208, Pay Item 20801, Structure excavation.

Section 204. – EXCAVATION AND EMBANKMENT

204.01 Delete in its entirety and substitute the following:

This work consists of minor embankment excavation and construction in order to construct the roadway approaches to each abutment.

Material

204.03 Add the following:

The Contractor is responsible for supplying all water used for compaction and other construction purposes. The bid schedule does not contain a pay item for water necessary for embankment compaction. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 151, Pay Item 15101, Mobilization.

204.11 Compaction. Add the following:

The Contractor shall compact the embankment to 95% of the material’s maximum dry density based on the results of the Proctor test following AASHTO T-180. The moisture content shall be within 2% of the optimum moisture content as determined by the appropriate Proctor test at the time of placement and compaction.

204.15 Acceptance. Add the following:

The Contractor shall test the embankment for moisture and density using nuclear methods following AASHTO T 310.

Measurement

204.16 Delete in its entirety and substitute the following:

Do not measure Excavation and Embankment for payment.

Payment

204.17 Add the following:

The bid schedule does not contain a pay item for Excavation and Embankment. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 301, Pay Item 30111-2, Aggregate surface course, 6-inch depth.

Section 207. – EARTHWORK GEOSYNTHETICS

207.01 Delete the first sentence of this paragraph and substitute the following:

This work consists of furnishing and placing a geotextile as a permanent erosion control measure in conjunction with the placed riprap construction. Geotextile placed below riprap shall match the specifications of Class 1, Type C Separation and Stabilization Geotextile as specified in Table 714-1.

Measurement

207.09 Delete in its entirety and substitute the following:

The estimated quantity of Class 1, Type C geotextile is 450 SY. The quantities of geotextiles are design quantities and will not be adjusted. The quantities provided do not include required laps in geotextile material.

Payment

207.10 Delete in its entirety and substitute the following:

The bid schedule does not contain a pay item for Earthwork Geosynthetics. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 251, Pay Item 25101-05, Placed riprap, method A, class 5.

Section 208. – STRUCTURE EXCAVATION AND BACKFILL FOR SELECTED MAJOR STRUCTURES

208.01 Delete in its entirety and substitute the following:

This work consists of excavating material for the construction of the abutments and the construction of the structural backfill. This work also includes the preserving of channels, shoring and bracing, sealing foundations, dewatering, excavating, preparing foundations, backfilling, and subsequent removal of safety features.

Material

208.02 Add the following:

It is recommended to obtain Structural Backfill from the on-site borrow area. This material may need to be screened in order to meet the specifications of Structural Backfill as specified in subsection 704.04. The Contractor may elect to use an off-site Structural Backfill source as long as it complies with the specifications.

The Contractor is responsible for supplying all water used for compaction and other construction purposes. The bid schedule does not contain a pay item for water necessary for Structural Backfill compaction. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 151, Pay Item 15101, Mobilization.

Construction Requirements

208.03 General. Add the following:

The Contractor shall submit the results of a soil classification test on the proposed Structural Backfill material following AASHTO M 145 and the results of a Proctor test following AASHTO T 180, method C to the CO for approval prior to the start of structural backfill placement. The Contractor is responsible for ensuring that the material meets the specifications of Structural Backfill.

208.04 Channel Preservation. Add the following:

The Contractor shall comply with all requirements of the Stream Alteration Permit.

208.11 Acceptance. Add the following:

The Contractor shall test the structural backfill for moisture and density using nuclear methods following AASHTO T 310. The Contractor shall test each compacted layer once. The Contractor shall not start constructing the next layer until the test results are within the required range. After any failed test, the contract shall provide additional compaction and moisture as needed until the test results are within the required range. The Contractor shall provide the CO with all test results including any failed test results.

Measurement

208.12 Add the following:

Measurement for Pay Item 20801, Structure excavation will be measured based on the in-place volume of material removed. The Contractor is responsible for documenting any differences in quantities by submitting drawn sections showing area and volume calculations.

Measurement for Pay Item 20803, Structural backfill will be measured based on the final compacted volume of structural backfill. The Contractor is responsible for documenting any differences in quantities by submitting drawn sections showing area and volume calculations.

Payment

208.13 Add the following:

Clearing and Grubbing (Section 201) necessary for this contract will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 20801, Structure excavation.

Removal of Structures and Obstructions (Section 203) necessary for this contract will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 20801, Structure excavation.

Revise the list of Pay Items and Pay Units as follows:

Payment will be made under:

Pay Item Pay Unit

Section 209. – STRUCTURE EXCAVATION AND BACKFILL

209.01 Add the following:

This work includes the excavation and backfill necessary for the construction of riprap under Section 251.

Measurement and Payment

209.12 Add the following:

Do not measure the Structure Excavation and Backfill necessary for the construction of the riprap. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 251, Pay Item 25101-05, Placed riprap, method A, class 5.

Section 212. – LINEAR GRADING

212.01 Delete in its entirety and substitute the following:

This work consists of constructing roadbeds within the specified alignment and grade tolerances at both roadway approaches.

Measurement

212.06 Delete in its entirety and substitute the following:

Do not measure Linear Grading for payment.

Payment

212.07 Delete in its entirety and substitute the following:

The bid schedule does not contain a pay item for Linear Grading. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 301, Pay Item 30111-2, Aggregate surface course, 6-inch depth

DIVISION 250

SLOPE REINFORCEMENT

AND RETAINING WALLS

Section 251. – RIPRAP

251.01 Add the following:

This work consists of placing government furnished riprap for bank protection, slope protection, and erosion control. This work also consists of structural excavation and backfill necessary for geotextile embedment and riprap placement.

Material

251.02 Add the following:

Riprap material will be stockpiled on-site by others. The riprap material will be Class 5 Riprap as specified in Table 705-1.

Construction Requirements

251.03 General. Add the following:

All existing riprap within the riprap limits shown on the Plans shall be removed and stockpiled on-site. The existing riprap may be reused if it meets the specifications of Class 5 Riprap. The Contractor shall construct new riprap armored slopes according to the Plans and Specifications.

Measurement

251.08 Delete in its entirety and substitute the following:

Measurement for Pay Item 25101-05, Placed riprap, method A, class 5 will be measured by the cubic yard, in-place.

Payment

251.09 Add the following:

Earthwork Geosynthetics (Section 207) necessary for riprap construction will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 25101-05, Placed riprap, method A, class 5.

Structure Excavation and Backfill (Section 209) necessary for riprap construction will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 25101-05, Placed riprap, method A, class 5.

Revise the list of Pay Items and Pay Units as follows:

Payment will be made under:

Pay Item Pay Unit

25101-05 Placed riprap, method A, class 5 Cubic Yard

DIVISION 300

AGGREGATE AND BASE

COURSES

Section 301. – UNTREATED AGGREGATE COURSES

301.01 Delete in its entirety and substitute the following:

This work consists of constructing a surface course of aggregate at both approaches to the bridge.

Material

301.02 Add the following:

Surface course aggregate shall have a gradation as specified in the modified Table 703-3 shown in this SCR. It is recommended to use the on-site borrow area as an aggregate source. This material will need to be screened down to 1-½ minus material in order to comply with the surface course gradation requirements. The Contractor may elect to use an off-site aggregate source as long as it complies with the specifications.

Construction Requirements

301.03 General. Add the following:

The Contractor shall submit the results of a soil classification test on the proposed surface course aggregate material following AASHTO M 145 and the results of a Proctor test following AASHTO T 99 to the CO for approval prior to the start of untreated aggregate placement.

301.08 Acceptance. Delete in its entirety and substitute the following:

Upon completion of surface course aggregate construction, the Contractor shall perform a proof roll over the aggregate surface with a fully loaded 3,000 gallon or greater water truck. The proof roll shall be performed under the supervision of the Government. The water truck shall drive slowly at approximately 1 mile per hour across the entire roadway length. If any signs of poor compaction are seen, then the Contractor is responsible for removing the material and re-compacting the base and surface material. Signs of poor base compaction include displacement of material around the wheel path, rutting, wheel settlement, and other related indications.

Payment

301.10 Add the following:

Excavation and Embankment (Section 204) necessary for surface course aggregate construction will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 30111-2, Aggregate surface course, 6-inch depth.

Linear Grading (Section 212) necessary for surface course aggregate construction will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 30111-2, Aggregate surface course, 6-inch depth.

Revise the list of Pay Items and Pay Units as follows:

Payment will be made under:

Pay Item Pay Unit

30111-2 Aggregate surface course, 6-inch depth Square yard

DIVISION 400

ASPHALT PAVEMENTS AND

SURFACE TREATMENTS

Section 402. – ASPHALT CONCRETE PAVEMENT BY HVEEM OR MARSHALL MIX DESIGN METHOD

402.01 Delete in its entirety and substitute the following:

This work consists of constructing a hot asphalt concrete roadway surface on the corrugated bridge deck.

Material

402.02 Add the following:

The asphalt mix design shall follow the Marshall mix design and shall match the specifications of Class B as specified in table 402-1. The aggregate in the asphalt shall be grading designation ½ inch according to Subsection 703.07. The asphalt binder shall match the specifications of Section 702. A Utah Department of Transportation (UDOT) asphalt concrete pavement mix design that conforms to UDOT specification section 02741 may also be used if approved by the Contracting Officer.

Construction Requirements

402.12 Production Start-Up Procedures.

(b) Control strip. Delete in its entirety.

402.17 Acceptance. Add the following:

The Contractor shall test the density of each compacted section of hot asphalt concrete pavement and ensure that the density is at least 92 percent of the maximum specific gravity (density) determined according to AASHTO T 209 as part of the job-mix formula evaluation specified in Subsection 402.03.

Measurement

402.18 Delete in its entirety and substitute the following:

Measurement for Pay Item 40201-02, Asphalt concrete pavement, marshall mix, class B, will be measured based on weight of the asphalt material placed according to the plans. The Contractor is responsible for supplying the CO with haul tickets from the Government approved asphalt plant that indicate date, time, truck number, gross truck weight, net truck weight, and the weight of the load.

Payment

402.19 Delete in its entirety and substitute the following:

The accepted quantities will be paid at the contract price per unit of measurement. The unit prices will not be adjusted based on smoothness tests. Any pavement that does not meet the specifications will be required to be removed and replaced at the Contractor’s expense.

Payment will be made under:

Pay Item Pay Unit

40201-02 Asphalt concrete pavement, marshall mix, class B Ton

DIVISION 550

BRIDGE CONSTRUCTION

Section 552. – STRUCTURAL CONCRETE

552.01 Add the following:

This work consists of constructing concrete bridge abutments. In addition, this work consists of installing an elastomeric joint seal between the concrete backwall and the end dam of the bridge deck as shown on the Plans.

Material

552.02 Add the following:

All cast-in-place concrete shall be structural concrete class A(AE) with a minimum compressive strength at 28 days of f’c = 4,500 psi. Concrete shall be air entrained and shall be mixed with type II, low alkali Portland cement conforming to AASHTO M85. Air content shall be 4% ± 1.0. Minimum cement content shall be 611 pounds per cubic yard of concrete. An approved air-entraining admixture shall be used.

The elastomeric joint seal shall be a delastic preformed compression seal CV-3000 as manufactured by D.S. Brown or an approved equal.

Construction Requirements

552.07 Mixing. Add the following:

The mixing procedure must be approved by the CO.

552.08 Delivery. Add the following:

The delivery procedure must be approved by the CO.

552.10 Temperature and Weather Conditions. Add the following:

Concrete shall be placed when the ambient temperature is less than 90 °F. If the Contractor elects to pour concrete in temperatures greater than 90 °F, then the Contractor shall submit detailed procedures to the CO for hot weather pouring as outlined in Subsection 552.10(b).

552.11 Handling and Placing Concrete. Add the following:

All concrete shall be vibrated. Chamfer all exposed edges of concrete ¾” unless otherwise shown on plans.

552.12 Construction Joints. Add the following:

Intentionally roughen all construction joints to an amplitude of 0.25 in. Exposed face of construction joints shall have a ¾” Vee groove along the centerline. Written approval from the CO is required for any additional construction joints not shown on the plans.

552.13 Expansion and Contraction Joints. Add the following:

After asphalt paving of the bridge deck has been completed, the Contractor shall thoroughly clean each bearing seat and bridge joint of all debris. Once the area is clean, the Contractor shall install the elastomeric joint seal following the manufacturer’s recommended procedures.

552.14 Finishing Plastic Concrete.

(d) Surface underneath bearings. Add the following:

Surface under elastomeric bearing pad shall be finished to a plan surface free of ridges.

552.16 Finishing Formed Concrete Surfaces. Add the following:

(g) Refinishing. Clean and refinish, according to the appropriate class, any concrete surfaces which are exposed to view that have become streaked or unsightly due to spilled mortar, leaching, or some other cause.

552.18 Loads on New Concrete Surfaces. Add the following:

Do not place any loads on finished abutments until tests on concrete cylinders cast from the same concrete and cured under the same conditions as the substructure elements indicate that the concrete has attained at least 80 percent of the specified minimum 28-day compressive strength. This restriction applies to loads imposed by placement of embankment backfill, but does not apply to placement of the upper lifts for substructure elements cast in stages.

552.20 Acceptance. Add the following:

Remove any concrete having a compressive strength of less than 90 percent of f’c or which is otherwise defective and is so located as to cause a detrimental effect on the structure. Replace with acceptable concrete according to Subsection 106.01. Replacement concrete will be accepted according to these specifications.

Measurement

552.21 Add the following:

The volume of concrete outside the neat lines of the footing required to be placed against undisturbed rock or soil will not be measured for payment.

Payment

552.22 Add the following:

Reinforcing Steel (Section 554) necessary for structural concrete construction will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 55201-02, Structural concrete, class A (AE).

Revise the list of Pay Items and Pay Units as follows:

Payment will be made under:

Pay Item Pay Unit

55201-02 Structural concrete, class A (AE) Cubic yard

Section 554. – REINFORCING STEEL

Material

554.02 Add the following:

All conventional reinforcing steel shall be uncoated deformed billet-steel conforming to AASHTO M31 (ASTM A615) and shall be Grade 60. The minimum clear cover for cast against earth members shall be 3” and the minimum clear cover for other exterior concrete shall be 2” unless otherwise specified on the plans. The Contractor shall submit reinforcing steel shop drawings that detail fabrication, bending, and placement.

Measurement

554.11 Delete in its entirety and substitute the following:

The estimated quantity of reinforcing steel is 2,400 pounds. The quantities of Reinforcing Steel are design quantities and will not be adjusted. The quantities provided do not include required laps in reinforcing steel.

Payment

554.12 Delete in its entirety and substitute the following:

The bid schedule does not contain a pay item for Reinforcing Steel. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 552, Pay Item 55201-02, Structural Concrete, class A (AE).

Section 555. – STEEL STRUCTURES

555.01 Delete the first sentence and substitute the following:

This work consists of furnishing and erecting a pre-engineered, shop-assembled, modular, clear-span steel bridge superstructure, fabricated in accordance with these specifications which shall be regarded as minimum standards. It includes the design, manufacture, and transportation of the prefabricated superstructure complete with a traffic rail system and a corrugated steel deck.

The bridge superstructure shall be 63 feet-0 inches long by 16 feet-0 inches wide. The length of the superstructure shall be measured from out-to-out and the width shall be the clear roadway distance between the traffic railings. The superstructure shall be fabricated in two pieces with a longitudinal joint along the centerline.

Revise the numbers of Subsections 555.03 through 555.19 consecutively to Subsections 555.06 through 555.22.

Material

Add the following Subsection:

555.03 Referenced Specifications and Standards. The workmanship and materials used in the fabrication of the superstructure shall be of the highest standard quality throughout and in accordance with the best standard practices of modern bridge fabrication. All material shall be new and the workmanship and materials shall conform to the applicable specification, codes, and standards.

Design Requirements

Add the following Subsection:

555.04 General Requirements. The design and fabrication of the bridge superstructure shall meet the following:

(a) Quality Certification. The superstructure shall be designed and fabricated by a company regularly engaged in the manufacture of pre-engineered bridges and currently certified by the American Institute of Steel Construction (AISC) in accordance with AASHTO LRFD Bridge Design Specifications, 6th Edition, 2012 with current Interim Revisions. The fabricator shall be certified to have the personnel, organization, experience, capability, and commitment to produce fabricated structural steel for the category "Simple Steel Bridges" as set forth in the AISC Quality Certification Program. Quality control shall be in accordance with procedures outlined for AISC Certification.

(b) Design Specifications. The superstructure shall be designed in accordance with the current edition, including all appropriate Interim Specifications, of AASHTO’s LRFD Bridge Design Specifications, 6th Edition, 2012.

(c) Qualifications of Design Personnel. The superstructure shall be designed by or under the direct supervision of a registered professional engineer experienced in the design of such work.

Add the following Subsection:

555.05 Technical Specifications. The superstructure shall meet the following requirements:

(a) Structure Type. The structure shall be a simple beam type of bridge with four steel multi-beams/multi-stringers supporting the deck.

(b) Live Load. The design live load shall be HL93 with dynamic load allowance. The deflection for service live load plus impact shall not exceed 1/800 of the span.

(c) Structural Steel. The superstructure shall be fabricated from high-strength low-alloy structural steel conforming to AASHTO M-270 (ASTM A 709), Grade 50W (self-weathering steel).

(d) Decking. The steel bridge decking shall be fabricated from galvanized, roll-formed, corrugated steel and shall be placed perpendicular to the direction of traffic. If the superstructure is furnished in two pieces, the deck shall have a positive connection for splicing the deck panels of the modular bridge sections.

(e) End Dams. The superstructure shall be furnished with end dams in the transverse direction at the ends of the bridge of sufficient height to match the top of the specified asphalt wearing surface.

(f) Edge Dams. The superstructure shall be furnished with edge dams in the longitudinal direction along both sides of the bridge of sufficient height to match the top of the specified asphalt wearing surface.

(g) Traffic Railing. Traffic railing shall meet AASHTO requirements for geometry and be designed for a minimum Test Level 2 (TL-2) as specified by NCHRP Report 350. The railing posts shall be fabricated from high-strength, low-alloy structural steel conforming to AASHTO M-270 (ASHTM A 709), Grade 50W (self-weathering steel). The bridge railing shall be galvanized steel. Hardware for traffic railing shall be of an approved corrosion resistant material conforming to or exceeding the requirements of ASTM A307.

(h) Finish. All exposed surfaces of the self-weathering steel shall be prepared after fabrication in accordance with the Steel Structures Painting Council Surface Preparation Specification No. 6 Commercial Blast Cleaning (SSPC-SP) to assure uniform weathering of all visible surfaces.

(i) Hardware. The manufacturer shall furnish all necessary bearing plates, elastomeric bearing pads, and assembly bolts. Bearing plates for the expansion abutment shall be appropriately slotted to allow for thermal expansion.

(j) Galvanizing. All galvanized material shall be hot-dipped after fabrication in accordance with ASTM Standard Specification A 123. All galvanized hardware shall be hot-dipped galvanized in accordance with ASTM Standard Specification A 153.

(k) Welding. All welding shall conform to the requirements of AWS D1.5.

Construction Requirements

555.06 Delete the “Drawings and Diagrams” heading for this subsection and substitute the following:

Drawings, Diagrams, and Computations. Delete the first sentence and substitute the following:

Prepare and submit design computations, drawings, and other information as follows for approval according to Subsection 104.03.

(a) Fabrication Drawings. Add the following:

Furnish complete and accurate fabrication drawings consisting of detail, fabrication, and other working plans showing full detailed dimensions and sizes of all component parts of the structure, details of all miscellaneous parts, and any other information necessary to complete the fabrication of the steel superstructure. All drawings shall be prepared, stamped, and signed by a Registered Professional Engineer in the state of Utah.

(b) Erection drawings. Add the following:

Fully illustrate the proposed method and procedure for the field assembly and erection of the superstructure, including details of all necessary falsework, bracing, and shoring, lifting methods, and field splicing. Indicate all anticipated sequences and conditions of erection.

Add the following paragraphs:

(e) Design Computations. Furnish complete design calculations containing all detailed information required to permit review and approval. All design calculations shall be prepared, stamped, and signed by a Registered Professional Engineer in the state of Utah.

(f) Substructure information. Furnish substructure design information consisting of the superstructure support reactions and location, size, and projections of the anchor bolts.

555.08 Inspection. Add the following:

The Contractor shall inform the CO when the bridge fabrication has been completed. The Government will have 14 days to inspect the prefabricated bridge, if elected, at the plant before shipment.

Furnish mill test reports for all structural steel components and fasteners, including but not limited to, the stringers, decking, diaphragms, traffic railing materials, and bearing plates. Also, furnish material test certification for the elastomeric bearing pads.

555.19 Connections Using High-Strength Bolts. Add the following:

Field splices shall be fully bolted with ASTM A325, Type 1 or ASTM A490, Type 1 highstrength steel bolts in accordance with AISC "LRFD Specification for Structural Joints Using ASTM A325 or A490 Bolts".

555.20 Welded Connections. Add the following:

All welders shall be certified in accordance with AWS D1.5 and shall have exhibited the necessary experience and skill in welding structural steel while demonstrating the ability to make uniform good welds of the type to be used in this work. All welding procedures and electrodes shall be compatible with the base metal used. All welds on galvanized materials shall be protected with high zinc content paint applied after weld metals have cooled.

Measurement

Change the number of Subsection 555.20 to Subsection 555.23.

555.23 Delete in its entirety and substitute the following:

The design, fabrication, transportation, storage, and erection of the structural steel superstructures will be measured by lump sum.

Payment

Change the number of Subsection 555.21 to Subsection 555.24.

555.24 Add the following:

Bearing Devices (Section 564) will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Pay Item 55504, Pre-fabricated steel bridge, furnished and erected.

Revise the list of Pay Items and Pay Units as follows:

Payment will be made under:

Pay Item Pay Unit

55504 Pre-fabricated steel bridge, furnished and erected Lump Sum

Section 562. – TEMPORARY WORKS

562.01 Delete in its entirety and substitute the following:

This work consists of the design, construction, inspection, maintenance, and removal of temporary formwork for the concrete abutments and temporary works for the installation and testing of the micropiles.

Section 564. – BEARING DEVICES

564.01 Delete in its entirety and substitute the following:

This work consists of furnishing and installing elastomeric bridge bearings and anchor bolts. Elastomeric bridge bearings shall conform to AASHTO M251.

Construction Requirements

564.08 Anchor Bolts. Delete in its entirety and substitute the following:

Galvanized anchor bolts shall be preset before placement of the concrete with a minimum embedment length of 18 in. Anchor bolts shall conform to ASTM A 307 and have a minimum diameter of 1-½ inches. Ensure that superstructure movement on the expansion abutment is not restrained by anchor bolts or nuts. The Contractor shall comply with the bridge manufacturer’s anchor bolt installation requirements.

Measurement

564.11 Delete in its entirety and substitute the following:

Do not measure Bearing Devices for payment.

Payment

564.12 Delete in its entirety and substitute the following:

The bid schedule does not contain a pay item for Bearing Devices. This work will not be paid for directly, but will be considered a subsidiary obligation of the Contractor under Section 555, Pay Item 55504, Pre-fabricated steel bridge, furnished and erected.

Section 567. – MICROPILES

567.01 Add the following:

The micropile design was based on FHWA’s reference manual FHWA NHI-05-039 titled Micropile Design and Construction. The Contractor shall use the Micropile Design and Construction manual during construction. Micropiles used for this project shall be Type B pressure grouted micropiles.

One verification test shall be performed on a sacrificial micropile as identified on the plans, following the specifications in Table 567-2. The Contractor shall notify the CO with the results of the of the verification test before installing production micropiles.