2/24/2026

ENG25-0079

TECHNICAL SPECIFICATIONS FOR

CITY OF KINGMAN PROJECT NO. ENG25-0079

CONSTRUCT ROADWAY AND DRAINAGE IMPROVEMENTS

FLYING FORTRESS PARKWAY AND AIRWAY AVENUE

HYE

WILLIAM D.

51693

C

E R

TIF

ICATE

NO

AR

IZONA,U.S

.A

R e g is t e r e d

Pr of essionalEngin e e r (C iv il)

D a te

Signed 02/ 24

TECHNICAL SPECIFICATIONS

Project Title: Flying Fortress Parkway and Airway Avenue

Project No.: ENG25-0079

Technical Specifications and Plans: Work shall be performed by the contractor as described herein, per the approved plans, and per the requirements of the following separate documents which are incorporated herein by reference, unless noted otherwise:

• City of Kingman, Uniform Standard Details for Public Works Construction (Revisions through

2020)

• City of Kingman, 2020 Addendums to MAG Uniform Standard Specifications for Public Works

Construction

• The Uniform Standard Specifications and Details for Public Works Construction, Maricopa

Association of Governments, 2022 Revision to the 2020 Edition, hereinafter referred to as

“MAG Standard Specifications”

• U.S. Department of Transportation, Federal Highway Administration Manual on Uniform

Traffic Control Devices for Street and Highways, 2009 Edition Revision 2, hereinafter referred to as “MUTCD”

• Arizona Department of Transportation, Standard Specifications for Road and Bridge

Construction, 2021

• Arizona Department of Transportation, Structure Detail (SD) Drawings with Revision Dates as shown on the 1D Standard Drawing List (Effective December 2021)

• Arizona Department of Transportation, Construction Standard (C) Drawings with Revision

Dates as shown on the Construction Standards Index Sheet 1A List (Effective April 2021)

Engineer: Wherever the term “Engineer” is used herein or on the plan sheets it shall be understood to mean “City Engineer” or “City Representative”.

Pre-Qualification of PCCP Contractor

Should the City elect to construct the PCCP Alternate pavement section, the apparent low bidder for that alternate shall, within 3 business days of the bid-opening date, submit to the City conclusive evidence of its previous acceptable experience in the construction of concrete roadways of similar scope, type, and magnitude as this project. It shall be at the sole discretion of the Kingman City Engineer and City Attorney as to the acceptability of such previous experience.

Should the submitted experience of the low bidder for the PCCP Alternate be deemed to be inadequate for this project, the second-low bidder for the PCCP alternate shall be requested to submit such evidence of previous relevant experience in similar PCCP roadway paving.

Pre-Construction Conference: The contractor’s project superintendent, other key Contractor staff and the

City will attend a Pre-construction Conference, conducted by the City to discuss, although not limited to, the following:

A. The scope of the project and the sequence and timing of all operations. Submission of

Contractor’s construction schedule, traffic control plan, and barricade plan.

B. City and Contractor’s respective authority and responsibilities.

C. Notice to proceed date.

D. Scheduling of work and the need to perform certain items at various stages of the project, including safety concerns which may arise because of the proposed work.

E. The general requirements of quality control and testing. It shall be clearly understood who will do the testing, what is to be tested, when it is to be tested, and the location and number of tests.

F. Change orders, time extensions, payment requests, and liquidated damages.

Weekly Site Meetings: Weekly site meetings will be held by the contractor once a week at an agreed upon day and time between the City and the contractor as required. The contractor will be responsible for taking meeting minutes and issuing meeting minutes prior to the next meeting.

Construction Schedule: The contractor shall submit to the City for approval, its proposed construction schedule at the Pre-Construction Conference. The construction schedule shall be in the form of a tabulation, chart, or graph and shall be in sufficient detail to show the chronological relationship of all activities of the project including, but not limited to, estimated starting and completion dates of various activities, submittal of shop drawing to the City for approval, procurement of materials, and scheduling of equipment. The construction schedule shall reflect completion of all work under the contract within the specified construction duration.

If the contractor desires to make a major change in the method of operations after commencing construction, or if the schedule fails to reflect the actual progress, the contractor shall submit to the City a revised construction schedule for approval in advance of beginning revised operations.

In addition to the preliminary schedule, the contractor shall prepare a weekly schedule to show all major elements of the work to be constructed in the next two (2) week period. This schedule shall consist of a neat, easy-to-read, bar graph format and shall be submitted to the City at the weekly progress meetings.

No work shall be performed within 500 feet of the White Cliffs Middle School while school is in session.

All work within these limits must be performed after school is out of session for the summer.

The exception to this restriction is that the contractor may install the pre-cast box culvert structure at STA.

111 + 28.89 ahead of the date of school closure for the summer, as long as the construction site remains secured from outside access at all times.

All bidders shall submit a proposed construction schedule showing completion of the project within the

150 calendar day construction duration required in the project specifications. This schedule shall be based on the assumption of there being 15 rain days within that 150 calendar day duration, and a box culvert segment delivery schedule as follows:

FLYING FORTRESS PARKWAY

• Rattlesnake Wash - 10 x 6 - 3/16/2026 – 3/30/2026

• Rattlesnake Wash 10 x 5 - 4/6/2026-5/8/2026

AIRWAY AVENUE

• STA. 150 + 42.76 - 10 x 5 - 4/6/2026-5/8/2026

• STA. 137 + 34.86 - 8 x 5 - 5/11/2026-6/8/2026

• STA. 128 + 14.99 - 8 x 5 - 5/11/2026-6/8/2026

• STA. 111 + 28.89 - 6 x 4 - 5/12/2026-5/22/2026

The contractor shall sign the schedule submitted, which will be considered as contractor’s commitment to conform to that schedule (in particular, to the 150 calendar day construction duration) under the conditions outlined above. Deviation from that schedule will only be acceptable if significant variation (as determined by the Engineer) from the above conditions occurs. Failure to complete construction within the 150 calendar day contract time, excluding extensions granted by the Engineer, shall subject the contractor to liquidated damages, as specified in MAG Section 108, Table 108-1.

Failure to Meet Required Production Rates: Failure by the contractor to timely and adequately respond to the Engineer’s weekly notice of production requirements shall constitute a material breach of the

Contract, whereupon the City may cancel the Contract and pursue any available legal remedy to recover for damages flowing from that breach.

Materials: Prior to the use or delivery of any materials, the contractor shall furnish signed and notarized

Certificates of Compliance to the Engineer to ensure that the City receives materials that are as specified.

Pre-Construction Photographs: The contractor shall provide pre-construction photographs of the entire work area and adjacent areas in digital format. The pictures shall be taken at an appropriate size and in sufficient detail for comparison with as-built conditions.

The contractor shall submit the Pre-Construction Photographs to the City prior to the start of Construction.

There shall be no separate payment for “Pre-Construction Photographs”. All labor, materials, and equipment necessary for completion of this item shall be included in the various Unit Prices bid. Any work or materials necessary but not specifically referred to in these items are considered incidental to the item and are included in the Unit Prices.

Sawcutting: Sawcutting of asphaltic concrete pavement shall be per MAG Standard Specification Section

336.2. All costs associated with this section are incidental to the work and there is no separate bid item for this work.

Environmental Mitigation Measures:

• If suspected hazardous materials are encountered during construction, work shall cease at that location and the Engineer will be contacted to arrange for proper assessment, treatment, or disposal of those materials.

• To prevent the introduction of invasive species, the contractor shall wash down all earth-moving and hauling equipment prior to allowing entrance to the construction site.

• To prevent invasive species seeds from leaving the site, the contractor shall inspect all construction equipment and remove all attached plant/vegetation debris prior to allowing equipment to leave the construction site.

Notifications: Two weeks prior to the start of work, the contractor shall notify property owners of the schedule to start construction along their property.

There shall be no separate payment for this item. Payment shall be made as part of the items in the proposal. All labor, materials, and equipment necessary for completion of this item shall be included in the

Unit Prices bid. Any work or materials necessary but not specifically referred to in these items are considered incidental to the item and are include in the Unit Prices.

Geotechnical Evaluation: A Geotechnical Evaluation Report, Airway Avenue Drainage Channel, Diamond

Joe Road to Airway Avenue, dated March 22, 2019, was prepared by Ninyo & Moore for the Airway Avenue section of this project from Station 105+29 to 124+12. A Geotechnical Report – Roadway, I-40 Rancho

Santa Fe Parkway Traffic Interchange, dated June 22, 2010, was prepared by Kleinfelder, and the

Geotechnical Review for Confirmation of Site Conditions I-40 Rancho Santa Fe Parkway Traffic Interchange, was prepared by Kleinfelder, dated September 16, 2020, for the Flying Fortress Parkway section of this project. These reports are available with the project bid documents. The contractor shall refer to the geotechnical reports for site specific information and be guided accordingly. There shall be no separate payment for addressing site specific conditions or recommendations included in the geotechnical reports.

Payment shall be made as part of the items in the proposal. All labor, materials, and equipment necessary for addressing site specific conditions shall be included in the Unit Prices bid.

Construction Survey, Layout & As-Built Surveying: The City will provide construction surveying, layout, and as-built surveying under the direction of an Arizona registered land surveyor (AZ RLS) familiar with construction staking. Survey work provided will include establishment of horizontal and vertical controls for the roadway, all construction staking, structures, alignment, and elevations.

Method of Measurement for Payment: Measurement and payment shall be in accordance with the MAG

Standard Specifications, except as set forth in the Bid Schedule and in these specifications and shall be for work satisfactorily completed.

All pay items relating to the work indicated on the project plans and/or specifications are listed in the Bid

Schedule. All necessary costs to complete this project shall be included within these pay items. Any work necessary to complete the project as represented in the plans and/or specifications that is not specifically noted as a pay item in the Bid Schedule shall be considered integral to the project and no separate payment shall be made.

Scope of Payment: The “complete-in-place” rate shall include but not necessarily be limited to all labor, material and equipment costs for preparation, installation, construction, modification, alteration or adjustment of the items, which shall include all costs for salaries and wages, all payroll additives to cover employee benefits, allowances for vacation and sick leave, company portion of employee insurance, social and retirement benefits, all payroll taxes, contributions and benefits imposed by any applicable law or regulation and any other direct or indirect payroll-related costs. The rate shall also include but not necessarily be limited to all costs for indirect charges or overhead, mileage, travel time, subsistence, materials, freight charges for material to Contractor’s facility or project site, equipment rental, consumables, tools, insurance to the levels specified in the Contract Documents or in Section 103.6, CONTRACTOR’S INSURANCE, all applicable taxes, as well as Contractor’s fee and profit. This rate shall further include all site clean-up costs and hauling of construction debris to disposal sites approved by the

Engineer.

Taxes: It is the contractor’s responsibility to correctly calculate and include in his bid all taxes as required by law and City policy. Failure to include taxes in the required amount shall be deemed as basis for rejecting a contractor’s bid.

Payment: Payment will be made for only those items listed in the proposal and will not be made in accordance with the measurement and payment provisions of the Uniform Standard Specifications where this differs from the items listed in the proposal. All materials and work necessary for completion of this project are included in proposal items. Any work or materials necessary but not specifically referred to in these items are considered incidental to the item and are included in the unit price.

Payments shall be made at the unit price and will not be made for unused materials.

Description of Bid Items:

106.02000 Contractor Quality Control

The Contractor shall be responsible for material sampling and testing to ensure quality control per MAG

Standard Specifications and to verify conformance with the Contract Documents. The Contractor shall utilize a certified testing laboratory and submit name and qualifications to the Engineer for approval. The

Contractor shall be responsible for all costs related to Quality Control Sampling and Testing. All costs associated with this item shall be included in this bid item.

Contractor shall provide Quality Control personnel. The City shall provide Quality Assurance Inspectors.

Testing shall be performed as directed by the City or its representative. Should any tests fail, the Contractor shall be responsible for removal and replacement of the failed installed materials at no cost to the City.

A. Material sampling and density testing for subgrade materials shall be per MAG Standard

Specifications Sections 301,310 and 702. Samples and tests shall be performed on each successive lift of material placed or as directed by the Engineer. Each report shall indicate the location from which the sample was taken, the date, the type and source of material tested, test designation and name of person performing the test. All test records shall be submitted to the Engineer within five (5) field days after the test.

B. The frequency of samples taken shall be a minimum of one (1) per day or as determined by the Engineer.

C. The locations of density tests shall be not more than 800 linear feet apart, or as determined by the Engineer. Exact locations of tests may be designated by the Engineer. The Engineer may require density testing to be done by the sand cone method. All costs associated with the sand cone method shall be at the contractor’s expense.

Payment for Contractor Quality Control work shall on a lump sum (Lump Sum) basis and will include all work to comply with these Specifications.

107.02000 AZPDES / Stormwater Pollution Prevention Plan

MAG Section 107.2 - Permits: is revised to add:

This project is subject to the terms and conditions of the Arizona Pollutant Discharge Elimination System

(AZPDES) General Permit No. AZG2025-001 for storm water discharge from construction activities as administered by the Arizona Department of Environmental Quality (ADEQ). Under the conditions of this permit, the Contractor shall be responsible for providing necessary materials; taking appropriate measure to ensure removal of additional sediment generated in storm water runoff from the project (relative to pre-project sediment levels) and completing the Notice of Intent (NOI) to be covered under AZPDES at the beginning of the project and the Notice of Termination (NOT) of coverage under AZPDES at the completion of the project. All Subcontractors must comply with AZPDES requirements under the supervision of the

Contractor.

Measurement and payment for Erosion Control and SWPPP measures will be made at the Lump Sum (Lump

Sum) contract unit price, which price shall be full compensation for completion and compliance with

AZPDES requirements and provision of copies of all SWPPP documents, and performing all work as specified herein.

109.09000 Mobilization/Demobilization

This item shall include mobilization and demobilization in accordance with MAG Standard Specification

Section 109.

Payment for mobilization and demobilization shall be on a lump sum (Lump Sum) basis and will include all work to comply with these Specifications.

201.01000 Clear and Grub

This item shall include furnishing all labor, equipment, and materials necessary for clearing and grubbing in accordance with MAG Standard Specification Section 201.

Payment for Clearing and Grubbing shall be on a lump sum (Lump Sum) basis and will include all work to comply with these Specifications.

206.01000 Structural Excavation

206.02000 Structural Backfill

This item shall include the furnishing of all materials and equipment and the providing of other facilities, which may be necessary to perform the excavations and place and compact the backfill in accordance with

MAG Standard Specification Section 206.

Payment for Structural Excavation and Structural Backfill shall be per cubic yard (CY). Hauling, placing, and compacting surplus structure excavation in embankments, or otherwise disposing of the material, shall be included in the contract price paid for structure excavation.

211.01010 Dike

This item shall include constructing embankments for dikes in accordance with MAG Standard Specification

Section 211.

Payment for Dike shall be per cubic yard (CY) of fill as stipulated in the proposal. Such price shall include placing and compaction and all related work as specified.

215.01100 Channel Excavation 3A, 3B & Airway Avenue, Sta. 111+29 Channelization

This item shall consist of clearing, stripping, excavation, fill, backfill, grading, and disposal of excavated and removed material. Channel Excavation shall be done in accordance with MAG Standard Specification 215.

Earthwork for open channel excavation will be paid for at the contract unit price per cubic yard (CY) of excavation as stipulated in the proposal. Such price shall include clearing, stripping, excavation, fill, backfill, compaction, grading, hauling, removal and disposal of excess excavated material and debris unless an alternate method of payment is stipulated in the proposal.

220.10100 Dumped Riprap (D50=4”)

220.10150 Dumped Riprap (D50=6”)

220.10225 Dumped Riprap (D50=9”)

220.10300 Dumped Riprap (D50=12”)

The Contractor shall install dumped riprap per MAG Specification Section 220 and as shown on the project plans. Geosynthetic filter fabric shall be installed prior to the dumped riprap in accordance with MAG

Standard Specification Section 796. All fabric shall be woven, high survivability fabric in accordance with

MAG Specification subsection 796.2.3. The rock shall be angular in shape and have a least dimension not less than one-third of its greatest dimension. Control of the gradation will be by visual inspection.

Payment shall be per cubic yard (CY) according to the bid schedule for all work complete and in place, including the riprap, geosynthetic filter fabric and excavation. All other costs associated with this item including filter fabric are incidental to the cost of the bid item.

221.10000 Gabion

The work under this item shall consist of furnishing all materials, including filter fabric, gabion baskets, rock, earthwork required to construct the gabions, gabion connections to adjacent structures, riprap drains, bedding material, filter fabric, and any special grading surrounding the gabions as shown on the project plans. All work shall be in accordance with the project plans and these Special Provisions unless noted otherwise.

Materials: Gabions and mattresses shall consist of wire mesh formed containers, rectangular in shape filled with rock. The wire mesh shall be non-raveling double twisted hexagonal, consisting of two wires twisted together in two 180 degree turns. Gabions shall be furnished as baskets having a height of 36 inches.

Mattresses shall have a thickness of 18 inches as shown on plans. Baskets and mattresses shall be fabricated within a dimension tolerance of plus or minus 5 percent, except that the mattress height shall be within 10 percent. Gabion baskets and mattresses shall be manufactured from 8x10 double twisted hexagonal woven steel wire mesh per ASTM A975 and shall be filled with stone at the project site. Gabions shall be manufactured and shipped with all components mechanically connected at the production facility.

a. Wire (Zinc Coated):

All tests on the wire must be performed prior to manufacturing the mesh. Tensile strength: both the wire used for the manufacture of gabions and the lacing wire, shall have a minimum tensile strength of 75,000 psi, in accordance with ASTM A641/A641M.

• Elongation: the test must be carried out on a sample at least 12 inches long. Elongation shall not be less than 12%, in accordance with ASTM A370.

• Zinc coating: minimum quantities of zinc according to ASTM A641/A641M, Class III soft temper coating.

• Adhesion of zinc coating: the adhesion of the zinc coating to the wire shall be such that, when the wire is wrapped six turns around a mandrel having four times the diameter of the wire, it does not flake or crack when rubbing it with the bare fingers, in accordance with ASTM

A641/A641M.

b. Galvanized (zinc coated) woven wire mesh gabions (8 x 10 mesh type):

• Wire mesh: Diameter - 0.120 inch

• Selvedge wire: Diameter - 0.153 inch

• Mesh opening: Nominal Dimension D = 3.25 inches, as per Fig. 1

c. Galvanized (zinc coated) lacing wire and internal stiffeners:

• Lacing wire: Diameter - 0.087 inch

• Cross tie/stiffener wire: Diameter - 0.087 inches

• Preformed Stiffener: Diameter – 0.153 inches internal

d. Steel Mesh Properties:

• Mesh Tensile Strength shall have a minimum strength of 3500 lb/ft when tested in accordance with ASTM A975 section 13.1.1

• Punch Test Resistance shall have a minimum resistance of 6000 lb when tested in accordance with ASTM A975 section 13.1.4

• Connection to selvedges shall have a minimum resistance of 1400 lb/ft when tested in accordance with ASTM A975

e. Overlapping Fasteners:

Overlapping fasteners may be used in lieu of, or to complement, lacing wire for basket or mattress assembly and installation. The spacing of the fasteners during all phases of assembly and installation shall be in accordance with spacing based on 1,400 lb/ft pull-apart resistance for galvanized mesh when tested in accordance with ASTM A975 section 13.1.2, with a nominal spacing of 4 inches, and not to exceed 6 inches.

• Galvanized Fasteners: Diameter = 0.120 inch, according to ASTM A313/A313M, Type 302, Class I

• Tensile strength: 230,000 to 273,000 psi in accordance with ASTM A764

• Proper installation of rings: A properly formed fastener shall have a nominal overlap of one

(1) inch after closure (Fig. 2).

f. Tolerances

• Wire: Zinc coating, in accordance with ASTM A641/A641M, Class III soft temper coating

• Gabion sizes: ± 5 % on the length, width, and height

• Mesh opening: Tolerances on the hexagonal, double twisted wire mesh opening shall not exceed ± 10% on the nominal dimension D values (see Fig. 1)

g. Fabrication

Gabions shall be manufactured and shipped with all components mechanically connected at the production facility. The front, base, back and lid of the gabions shall be woven into a single unit. The ends and diaphragm(s) shall be factory connected to the base. All perimeter edges of the mesh forming the basket and top, or lid, shall be selvedged with wire having a larger diameter.

Where the length of the gabion exceeds its horizontal width, the gabion is to be equally divided by diaphragms, of the same mesh and diameter as the body of the gabions, into cells whose length does not exceed the horizontal width. The gabion shall be furnished with the necessary diaphragms secured in proper position on the base section in such a manner that no additional tying at this juncture will be

Mesh Type Nominal

Dimension D

F necessary.

h. Rock

36” Gabion Basket: The rock for gabions shall be hard, angular, durable and of such quality that they shall not disintegrate on exposure to water or weathering during the life of the structure. Gabion rocks shall range between 6 inches and 10 inches. The range in sizes may allow for a variation of 5% oversize and/or

5% undersize rock, provided it is not placed on the gabion exposed surface. The size shall be such that a minimum of two layers of rock must be achieved when filling the gabions.

18” Gabion Mattress: The rock for gabions shall be hard, angular, durable and of such quality that they shall not disintegrate on exposure to water or weathering during the life of the structure. Gabion rocks shall range between 6 inches and 10 inches. The range in sizes may allow for a variation of 5% oversize and/or 5% undersize rock, provided it is not placed on the gabion exposed surface. The size shall be such that a minimum of two layers of rock must be achieved when filling the gabions.

Execution:

a. Shop Drawings

Contractor shall submit shop drawings of the gabions to the Engineer for review prior to construction of the gabions.

a. Foundation Preparation

The foundation on which the gabions are to be placed shall be cut or filled and graded to the lines and grades shown on the drawings. Surface irregularities, loose material, vegetation, and all foreign matter shall be removed from foundations. When fill is required, it shall consist of materials conforming to the specified requirements. Gabions and bedding or specified geotextiles shall not be placed until the foundation preparation is completed, and the subgrade surfaces have been inspected and approved by the Engineer.

b. Geotextile Fabric for Gabion Mattresses and Baskets

Geotextile fabric will be required to separate any surface of gabion mattresses or baskets from surrounding soil as shown in the plans. Geotextile fabric shall be Type A, Table 796-3, of MAG specification Section 796.

c. Assembly

The gabion units shall be assembled individually by erecting the sides, ends, and diaphragms, ensuring that all panels are in the correct position, and the tops of all sides are aligned. The four corners shall be connected first, followed by the internal diaphragms to the outside walls. All connections shall use lacing wire or fasteners as previously described herein.

All perimeter edges of gabions are to be securely selvedged or bound so that the joints formed by tying the selvages have at least the same strength as the body of the mesh. The procedure for using lacing wire consists of cutting a sufficient length of wire, and first looping and/or twisting the lacing wire to the wire mesh.

Proceed to lace with alternating double and single loops through every mesh opening, pulling each loop tight and finally securing the end of the lacing wire to the wire mesh by looping and/or twisting.

The use of fasteners in lieu of lacing wire shall be in accordance with the manufacturer’s recommendations or as specified herein.

d. Installation

After assembly, the gabion baskets and mattresses shall be carried to their final position and securely joined together along the vertical and top edges of their contact surfaces using the lacing wire procedure(s) described in Section C. Whenever a structure requires more than one layer, the upper empty baskets shall also be connected to the top of the lower layer along the front and back edges of the contact surface using the lacing wire procedure(s) described in Section C. Gabions shall be connected together and aligned before filling the baskets with rock.

e. Filling

Baskets and mattresses shall be filled with rock as specified herein. During the filling operation some manual stone placement may be required to minimize voids. The exposed faces of vertical structures shall be carefully hand placed to give a neat, flat, and compact appearance. The exposed face or faces shall be hand-placed using selected stones to prevent bulging of the gabion cell and to improve appearance. Each cell shall be filled in lifts not exceeding 1 foot.

The last lift of stone in each cell shall be level with the top of the gabion in order to properly close the lid and provide an even surface for the next course.

All gabion units shall be tied together each to its neighbor along all contacting edges in order to form a continuous connecting structure.

Empty gabions stacked on filled gabions shall be laced to the filled gabion at the front, side and back.

The cells shall be filled in stages so that local deformation is avoided. At no time shall any cell be filled to a depth exceeding 1-foot higher than the adjoining cell. Behind gabion walls, the backfill material shall be compacted simultaneously to the same level as the filled gabions.

f. Internal Connecting Wires

Pre-formed stiffeners or lacing wire shall be used as internal connecting wires where a structure requires more than one layer of gabions to be stacked on top of each other. Internal Connecting Wires with lacing wire shall connect the exposed face of a cell to the opposite side of the cell. Internal Connecting Pre-formed stiffeners shall connect the exposed face of a cell to the adjacent side of the cell. Pre-formed stiffeners shall be installed at 45° to the face/side of the unit, extending an equal distance along each side being braced

(approximately 1 foot) An exposed face is any side of a gabion cell that will be exposed or unsupported after the structure is completed.

g. Closing

Once the gabion baskets are completely full, the lids shall be pulled tight until the lid meets the perimeter edges of the basket. The lid shall be tightly laced and/or fastened along all edges, ends and tops of diaphragm(s) in the same manner as described in Section C. Adjacent lids may be securely attached simultaneously. All end wires shall be turned in to avoid protrusions.

Where more than one layer of gabions is required, the upper layer of the gabions shall be connected to the lower layer after the lower layer has been securely closed.

h. Mesh cutting and folding

Where shown on the drawings or otherwise directed by the Engineer, the basket mesh shall be cut, folded and fastened together to suit existing site conditions. The mesh must be cleanly cut and surplus mesh either folded back or overlapped so that it can be securely fastened together with lacing wire or fasteners in the manner described in Section C. Any reshaped gabions shall be assembled, installed, filled and closed as specified in the previous sections.

i. Construction Equipment

Construction equipment shall not be operated directly on the gabion baskets or mattresses.

Payment: Gabions and mattresses shall be measured and paid per cubic yard (CY) according to the bid schedule for all work complete and in place. This price shall be full compensation for the work, complete in place, including furnishing and installing the gabion baskets, rock, riprap drains, filter fabric, granular bedding, wire ties, and miscellaneous metal items and associated work described herein and as shown on the project plans.

301.01000 Subgrade Preparation and 8” Scarification

This item shall include furnishing all labor, equipment and materials necessary for subgrade preparation in accordance with MAG Standard Specification Section 301 and per the typical sections in the project plans.

Work under this section shall include preparation of the subgrade in areas of new construction prior to the placement of sub-base material, pavement, curb and gutter, sidewalk, curb returns and driveways. All traveled areas shall be compacted to a minimum of 95% at the optimum moisture content. When backfilling, sufficient amounts of water shall be added to achieve a consistent moisture content of +/- 2% of optimum to achieve required compaction.

There is a stockpile of roughly 90,000 cubic yards of material that was excavated from the adjacent ADOT

I-40 TI project, which is located within the City’s Flying Fortress Parkway right-of-way. This material is available to the contractor at no cost.

Earthwork for the project shall include, but not limited to, all grading, drainage swales, compaction, details, permits and approvals, labor, materials, and equipment, in accordance with MAG Standard Specification

Section 205, Section 211, and per the project plans.

Scarification: Geotechnical investigations have found that the existing materials below the natural ground surface within the roadway improvement limits do not have the appropriate in-situ density to sustain the roadway embankment loads, or included voids during the geotechnical testing that must be scarified. For the full width of the roadway improvements, the upper 8 inches of soils below the new roadway embankments, pavements, culverts and box culvert shall be scarified and recompacted as shown in the

Table 1 – Compaction Requirements below.

Table 1 – Compaction Requirements

Description Percent Compaction per

ASTM D698

Moisture Content

Aggregate Base Course (ABC) 100 percent ±2 percent of optimum

Roadway Subgrade Below ABC 95 percent ±2 percent of optimum

Headwall Foundations and

Culverts

95 percent ±2 percent of optimum

Site Preparation: Prior to placing any fill, pavement, or flatwork, the following guidelines shall be followed:

Obstructions that extend below finished grade, if any, shall be removed and the resulting holes filled with compacted soil

After stripping, clearing, grubbing, and root raking is performed and prior to placement of any fill soils, the exposed subgrade shall be evaluated by proof-rolling. Any soft or weak areas observed during the proof-rolling process shall be removed and replaced with compacted material as shown in Table 1 above.

Proof-rolling shall be accomplished with a pneumatic-tired roller, a loaded dump truck, or similar equipment weighing approximately 20 tons and observed by the Engineer.

Due to the clayey and silty nature of the surficial soils at some locations along the alignment, traffic of heavy equipment (including heavy compaction equipment) may create pumping and general deterioration of shallow soils.

Unsuitable Material: Material shall be considered unsuitable for fill, subgrade, shoulders, and other uses if it contains organic matter, soft spongy earth, or other matter of such nature that compaction to the specified density is unobtainable. Material that is unsuitable for the intended use, shall be excavated and removed from the site or otherwise disposed of as directed by the Engineer. No direct payment will be made for the removal and disposal of unsuitable material described above, the costs being considered included in other items of work.

Roadway Excavation: shall not be paid for separately. All roadway excavation shall be included in the

Subgrade Preparation bid item and shall include all earthwork related labor, materials, and equipment.

Roadway Embankment/Fill or Imported Borrow: shall not be paid for separately. All roadway embankment/fill or imported borrow shall be included in the Subgrade Preparation bid item and shall include all earthwork related labor, materials, and equipment.

Fill shall generally be placed in 8-inch thick loose lifts such that each lift is firm and non- yielding under the weight of construction equipment.

If imported fill is required, it shall be examined by a Soils Engineer to ensure that it is of low swell potential and free of organic or otherwise deleterious material. In general, the fill shall have 100 percent passing the

3-inch sieve and a combination of percent passing the 200 sieve and plasticity index that would result in a correlated R-value (per ADOT method) of equal to, or better than the 43 value used for the pavement design on this project. It shall exhibit less than 1.5 percent swell potential when compacted to 95 percent of maximum dry density (ASTM D- 698) at a moisture content of ±2 percent below optimum, confined under a 100 psf surcharge, and inundated.

Earthwork Factors: The earthwork calculations and quantities shown in the project plans used 15 percent shrinkage for on-site excavated materials.

It is the contractor’s responsibility to determine the extent of earthwork to be accomplished, including excavation, borrow, fill construction, shrink / swell, removal, disposal, and replacement of unsuitable material. No additional compensation shall be made for errors or omissions related to the amount of earthwork required. Excess material suitable for use as roadway embankment shall be used to widen roadway embankment along Flying Fortress Parkway and Airway Avenue and at the Flying Fortress

Parkway / Airway Avenue intersection, as shown on the project plans and as specified in these technical specifications. It is the contractor’s responsibility to dispose of unsuitable material at an appropriate off-site location approved by the Engineer in accordance with City, State, and Federal regulations. If excess material volume is inadequate to widen embankments to their ultimate width on all four legs of the intersection, embankments shall be completed in the following priority order or as directed by the

Engineer:

1. South leg

2. West leg

3. North leg

4. East leg

Payment for Subgrade Preparation shall be per square yard (SY), including scarification, according to the bid schedule for all work complete and in place.

321.01600 Furnish & Install Pavement Section No. 1 (7.5” AC, 8” ABC) (AECOM)

The bidder shall submit bids for BOTH of the two alternate pavement sections on Flying Fortress Parkway and in the intersection of Flying Fortress Parkway and Airway Avenue within the limits shown on the plans:

10” PCCP on 4” AB (“the concrete pavement section alternate”), and 7.5” AC on 4” AB (“the AC pavement section alternate”).

Based upon the dollar difference between the two bids, the City may decide to proceed with the concrete pavement section alternate even though it may be a higher cost than the AC alternate. This choice will be determined by City funding availability.

The low bidder on this project shall be determined by the lowest total project bid received for whichever pavement section alternate is selected by the City (lowest TOTAL PROJECT BID for the concrete pavement alternate OR lowest TOTAL PROJECT BID for the AC pavement alternate).

321.01700 Furnish & Install Pavement Section No. 2 (4” AC, 9” ABC) (AECOM)

321.01900 Furnish & Install Pavement Section No. 1 (4” AC, 9” ABC)

321.01910 Furnish & Install Pavement Section No. 2 (3” AC, 5” ABC)

321.01920 Furnish & Install Pavement Section No. 3 (4” AC, 6” ABC) (AECOM)

These items shall include furnishing all labor, equipment, and materials necessary to furnish and install the pavement sections shown on the project plans.

Aggregate base course shall be accomplished in accordance with MAG Standard Specification Section 310 and per the typical section. Aggregate base course may vary not more than ½-inch above or below required grade and cross-section. When in the opinion of the Engineer there is reason to believe that a deficiency in thickness, or an excess of plasticity exists, measurements or samples will be taken in the same pattern as that defined in Section 321 or as otherwise noted in MAG Section 310.

Asphaltic concrete placement shall be in accordance with MAG Standard Specification Section

321. Material shall be in accordance with MAG Standard Specification Section 710 with a Marshall ¾” Mix for high volume roadways.

All material sources must be approved by the Engineer prior to their use. Once approved, material sources shall not be changed without the approval of the Engineer. Contractor shall submit material samples at least (7) seven days prior to start of construction. When requested, additional samples shall be furnished during the construction period at no cost to the City. Material sample submittal is a non-pay item.

No asphalt shall be placed that is below the required temperature. No asphalt shall be accepted that fails density tests. Asphalt finish course shall be free of rock pockets and imperfections. Asphalt shall be free of deleterious material.

Asphaltic concrete pavement shall be removed and replaced to the satisfaction of the City. In the event that there is excess material or spoils on the site as a result of paving operations, the contractor is to remove the material within three (3) days of pavement completion.

Contractor will remove the larger asphalt aggregate material when raking the matching edges and in area which requires hand work. The larger asphalt aggregate material shall be removed. The contractor will not push the larger asphalt aggregate material back out onto the finished asphalt matt.

Reclaimed or recycled material for asphalt pavement shall not be used as material in the asphalt design mix. Only new materials shall be used.

Finished asphalt pavement shall not extend beyond or over the lip of concrete. If asphalt pavement material is place beyond or over the lip of concrete, the contractor shall remove the asphalt material immediately.

Pavement Cross Slope: It shall be the responsibility of the contractor to take all necessary survey measures in order to meet the required pavement cross slope called out on the plans, and to assure positive surface drainage into the gutter line. The contractor shall use an “Automatic Slope Controller” during paving operations.

It shall be the responsibility of the contractor to repair any low/ponding area (bird baths) and/or bumps at his/her own expense by infrared heating the affected areas to heat the asphalt material back up, and add additional asphalt concrete material to a level smooth surface and recompacted the asphalt to correct the drainage issues. Milling and replacing, and skin patching will not be allowed.

Pavement Surface Drainage Test: Upon completion of the paving operations, the contractor shall test the pavement surface drainage with a water truck. The contractor shall call for inspection of the pavement surface drainage prior to the application of water to the pavement surface. Water testing is considered incidental to this item and is included in the Unit Price.

Tack Coat: Contractor shall apply tack coat according to MAG Section 329 or as directed by the Engineer.

Tack coat shall be applied to all saw cut or milled asphalt pavement surfaces, faces of concrete for curbs, aprons and valley gutters abutting the new asphalt pavement. Tack coat shall be approved prior to paving.

Tack coat is considered incidental to this item and is included in the Unit Price.

Material Testing: Contractor shall be responsible for providing an on-site testing agency materials technician at the approved asphalt plant to monitor each day’s production of the various asphalt design mixes associated with the project.

Adjustments: Contractor shall be responsible for adjusting to finished pavement grade all manhole frames and covers, water valve boxes and covers, flushing valve water meter boxes and covers, and survey monuments which require adjustment to finish grade.

Contractor is to mark and maintain all utility locations prior to the preparation of subgrade. The collar around the adjustments and survey monuments shall be set using black integrally colored concrete.

Contractor shall be responsible for the removal of existing asphaltic pavement material on manhole, sewer cleanout and water valve covers, including curbs.

Cleanup: Contractor after completion of construction shall clean all construction debris from streets, curbs and driveways. Additionally, any asphalt emulsion tracked onto the existing curbs shall be cleaned using soda stripping. The work is considered incidental to the item and is included in the Unit Price.

Payment: Payment for Furnish & Install Asphalt Concrete shall be per square yard (SY) according to the bid schedule for all work complete and in place. All labor, materials and equipment necessary for completion of this item shall be included in the Unit Prices bid. Any work or materials necessary but not specifically referred to in these items including AB and tack coat are considered incidental to the item and are included in the Unit Prices.

321.04100 Safety Pavement Edge (MAG 201, Safety Edge)

This item shall include furnishing all labor, equipment and materials necessary to construct a safety pavement edge in accordance with MAG Detail 201, MAG Sections 301, 310 and 321, and as shown on the plans.

Payment for safety pavement edge shall be per linear foot (LF) according to the bid schedule for work completed.

324.01092 Furnish & Install Pavement Section No. 1, Alt 1, (10” PCCP, 4” ABC) (AECOM)

These items shall include furnishing all labor, equipment, and materials necessary to furnish and install the pavement sections shown on the project plans.

The contractor shall furnish a proposed jointing pattern drawing for City review at least 30 calendar days before beginning placement of PCCP pavement. The jointing pattern submitted and ultimately constructed shall conform to the following requirements:

• American Concrete Pavement Association guidance on slab size and configuration, conforming to the following requirements:

1. Minimum Slab Width 2’

2. Maximum Slab Width 15’

3. No Acute-Angle Corners on any slab

4. No Odd-Shaped (round-edged) Slabs - Keep slabs as close to square as possible

• Longitudinal joints shall not be in the wheel path for lanes being constructed now and in future widenings – basically, longitudinal joints shall be on the lane lines or within 6” from the edge of lane line stripes

Portland cement concrete pavement (PCCP) shall be in accordance with MAG Section 324 and as shown on the plans.

Aggregate base course shall be accomplished in accordance with MAG Standard Specification Section 310 and per the typical section.

Adjustments: Contractor shall be responsible for all manhole frames and covers, water valve boxes and covers, flushing valve water meter boxes and covers, and survey monuments which require adjustment to finish grade.

Payment for furnish & install pavement section No. 1, Alt 1, (10” PCCP, 4” ABC) shall be per square yard

(SY) according to the bid schedule for work completed.

The bidder shall submit bids for BOTH of the two alternate pavement sections on Flying Fortress Parkway and in the intersection of Flying Fortress Parkway and Airway Avenue within the limits shown on the plans:

10” PCCP on 4” AB (“the concrete pavement section alternate”), and 7.5” AC on 4” AB (“the AC pavement section alternate”).

Based upon the dollar difference between the two bids, the City may decide to proceed with the concrete pavement section alternate even though it may be a higher cost than the AC alternate. This choice will be determined by City funding availability.

The low bidder on this project shall be determined by the lowest total project bid received for whichever pavement section alternate is selected by the City (lowest TOTAL PROJECT BID for the concrete pavement alternate OR lowest TOTAL PROJECT BID for the AC pavement alternate).

340.01020 Engineered Rubber Curbs

This item consists of furnishing and installing engineered rubber curbs at the southwest corner of the Flying

Fortress Parkway / Airway Avenue intersection, as shown on the “Flying Fortress / Airway Avenue

Intersection Concrete Jointing Detail Sheet.” This rubber curbing is to be installed in an 80’ – 40’ 80’ compound curve configuration.

The rubber curb shall be installed using 10-inch long ½” diameter lag bolts, set into anchors in the concrete surface. Bolts and anchors shall be located 1 foot apart, throughout the length of the curb installation.

The rubber curb sections shall be 6” high and wide, 36” long, and shall weigh at least 10 pounds per foot.

The curb shall be black, with a white stripe. The curb shall be both UV and heat resistant.

The contractor shall provide cut sheets for review and approval before ordering the product. Measurement and Payment shall be per linear foot of curb installed in place, calculated by the number of 36-inch-long sections installed. Measurement and payment shall not include gaps between adjacent 36-inch sections.

340.01117 Steel-Reinforced Gutter

This item consists of constructing modified MAG Detail 220-1 gutter, modified to be 9” thick and to include reinforcing steel, at the location of future fire station driveways, immediately east of White Cliffs Middle

School on the north side of Airway Avenue, per the details shown on Sheets A-4 through A-6. This reinforced gutter shall be poured monolithically with the adjacent reinforced driveway and reinforced sidewalk behind it.

Payment shall be by the linear foot of reinforced gutter, including all concrete, steel, and labor.

340.01150 Single Curb, MAG Det 222, Type A

This item shall include furnishing all labor, equipment and materials necessary to construct concrete curb in accordance with MAG Detail 222, MAG Section 340 and as shown on the plans.

Subgrade shall be compacted to a relative density of 90% minimum and 95% maximum at a moisture content of optimum or up to 2% below. Compaction tests shall be done for every 300 feet of curb, or once per pour day minimum.

There shall be a maximum interval of 50 feet between expansion joints. Each concrete load shall be tested for air content, temperature, and compressive strength.

Payment for concrete curbs shall be per linear foot (LF) according to the bid schedule for work completed.

340.01151 Single Curb – MAG Det 222 Type A…