Division 13-21-001
Revisions to MAG Uniform Standard Specifications
Sections:
13-21-001-0010 Flagstaff Addendum to MAG Uniform Standard Specifications for Public Works Construction
13-21-001-104.1.3 MAG Spec 104.1.3 – Clean-Up and Dust Control
13-21-001-106.2 MAG Spec. 106.2 – Control of Materials – Samples and Tests of Materials
13-21-001-0107.7 MAG Spec. 107.7 – Barricades and Warning Signs
13-21-001-0108.5 MAG Spec 108.5 - Limitations of Operations
13-21-001-0211.2 MAG Spec. 211.2 – Fill Construction – Placing
13-21-001-0211.3 MAG Spec 211.3 – Fill Construction – Compacting
13-21-001-0301.3 MAG Spec. 301.3 – Sub-Grade Preparation – Relative Compaction
13-21-001-0310.2 MAG Spec. 310.2 – Untreated Base – Placing
13-21-001-0311.2 MAG Spec. 311.2 – Soil Cement Base Course – Materials
13-21-001-0311.4 MAG Spec. 311.4 – Soil Cement Base Course – Construction Methods
13-21-001-0321.5 MAG Spec. 321.5 – Asphaltic Concrete Paving – Placing, Spreading, and Finishing
13-21-001-0321.5.3 MAG Spec. 321.5.3 – Asphaltic Concrete Pavement – Leveling Course
13-21-001-0321.5.4 MAG Spec. 321.5.4 – Asphaltic Concrete Pavement – Asphalt Base and Surface Course
13-21-001-0321.6 MAG Spec. 321.6 – Asphaltic Concrete Pavement – Corrective Requirements for Deficiencies
13-21-001-0330.2.1 MAG Spec. 330.2.1 – Asphalt Chip Seal – Materials – Asphalt
13-21-001-0330.3 MAG Spec 330.3 – Asphalt Chip Seal – Time of Application and Weather Conditions
13-21-001-0330.4.8 New Sub-Title: MAG Spec. 330.4.8 – Asphalt Chip Seal – Protection to Adjacent Property
13-21-001-0336.2.1 MAG Spec 336.2.1 – Pavement Widening or Extensions
13-21-001-0336.2.3 MAG Spec. 336.2.3 – Temporary Pavement Replacement
13-21-001-0336.2.4 MAG Spec. 336.2.4 – Pavement Matching and Surface Replacement – Permanent Pavement Replacement
13-21-001-0340.2 MAG Spec. 340.2 – Concrete Curb, Gutter, Sidewalk, Driveway and Alley Entrance – Materials
13-21-001-0340.3 MAG Spec. 340.3 – Concrete Curb, Gutter, Sidewalk, Driveway and Alley Entrance – Construction Methods
13-21-001-0342.2.1 MAG Spec. 342.2.1 – Decorative Pavement – Sand Aggregate Base Course
13-21-001-0342.2.4 MAG Spec. 342.2.4 – Decorative Pavement – Brick
13-21-001-0342.3.3 MAG Spec. 342.3.3 – Decorative Pavement – Header
13-21-001-0342.3.4 MAG Spec. 342.3.4. – Decorative Pavement – Concrete Paving Stones
13-21-001-0342.3.6 MAG Spec. 342.3.6 – Decorative Pavement – Sand Laying Course
13-21-001-0345.2 MAG Spec. 345.2 – Adjusting Frames, Covers, Valve Boxes, and Water Meter Boxes – Adjusting Frames
13-21-001-0345.3 MAG Spec. 345.3 – Adjusting Frames, Covers, Valve Boxes, and Water Meter Boxes – Adjusting Valve Boxes
13-21-001-0401.5 MAG Spec. 401.5 – Right-of-Way and Traffic Control General Traffic Regulations
13-21-001-0405.2 MAG Spec. 405.2 – Monuments – Materials
13-21-001-0505.3 MAG Spec. 505.3 – Concrete Structures – Forms
13-21-001-0505.6 MAG Spec. 505.6 – Concrete Structures – Placing Concrete
13-21-001-0505.6.2 MAG Spec. 505.6.2 – Concrete Structures – Adverse Weather Concreting
13-21-001-0601.2.3 MAG Spec. 601.2.3 – Water and Sewer – Trench Grade
13-21-001-0601.2.9 MAG Spec. 601.2.9 – Water and Sewer – Trench Excavation, Backfill and Compaction – Shoring and Sheeting
13-21-001-0601.4.3 MAG Spec. 601.4.3 – Trench Excavation, Backfill and Compaction – Backfill
13-21-001-0601.4.4 MAG Spec. 601.4.4 – Water and Sewer – Trench Excavation, Backfill and Compaction – Compaction Densities
13-21-001-0610.10 MAG Spec. 610.10 – Connection to Existing Mains
13-21-001-0625.3 MAG Spec. 625.3 – Manhole Construction and Drop Sewer Connections – Construction Methods
13-21-001-0702.1 MAG Spec. 702.1 – Base Materials – General
13-21-001-0702.2.2 MAG Spec 702.2.2 – Base Materials – Crush Aggregate – Grading
13-21-001-0710.2.1 MAG Spec. 710.2.1 – Asphaltic Concrete – Material – Asphalt Binder
13-21-001-0710.2.2 MAG Spec. 710.2.2 – Asphalt Concrete – Aggregate
13-21-001-0710.3.1 MAG Spec 710.3.1 – Asphalt Concrete – Mixed Design Requirements – General
13-21-001-0710.3.2.1 MAG Spec 710.3.2.1 – Asphalt Concrete – Mix Design Requirements – Marshall Mix Design
13-21-001-0710.4.2 MAG Spec 710.4.2 – Asphalt Cement Content
13-21-001-0713.1 MAG Spec. 713.1 – Emulsified Asphalts - General
13-21-001-0716.2.1 MAG Spec. 716.2.1 – Cover Material – Stone Chips - General
13-21-001-0716.2.3 MAG Spec. 716.2.3 – Cover Material – Stone Chips - Gradation
13-21-001-0725.1 MAG Spec. 725.1 – Portland Cement Concrete – Classes of Concrete
13-21-001-0725.3 MAG Spec. 725.3 – Portland Cement Concrete Aggregates
13-21-001-0725.5 MAG Spec. 725.5 – Portland Cement Concrete – Water
13-21-001-0750.2 MAG Spec. 750.2 – Iron Water and Pipe Fittings, Ductile Iron Water Pipe
13-21-001-0750.3 MAG Spec 750.3 – Iron Water and Pipe Fittings, Joint Requirements
13-21-001-0760.1 MAG Spec. 760.1 – Coating Corrugated Metal Pipe and Arches – General
13-21-001-0010 Flagstaff Addendum to MAG Uniform Standard Specifications for Public Works Construction
This addendum is based on the Maricopa Association of Governments Uniform Standard Specifications and Standard Details for Public Works Construction (MAG Specs and Details) latest revisions.
Each chapter number indicates the section of MAG Specifications on which the change is made.
Paragraph number references are counted from the beginning of the respective title. (Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-104.1.3 MAG Spec 104.1.3 – Clean-Up and Dust Control
Revise to include the following:
The use of City reclaimed wastewater is encouraged on all construction activity, and it is required on all major construction activity in accordance with City Code, Section 7-03-001-0014, Water Conservation.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-106.2 MAG Spec. 106.2 – Control of Materials – Samples and Tests of Materials
Third paragraph, revise second sentence to read as follows:
Unless otherwise specified, samples and tests will be made in accordance with either; the Materials Testing Manual of the Contracting Agency; the standard methods of AASHTO, ASTM, or ADOT, which were in effect and published at the time of advertising for bids.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0107.7 MAG Spec. 107.7 – Barricades and Warning Signs
Revise to include the following:
The Traffic Barricade Manual referred to under this section and thereafter in the Standard Specifications shall be part of VI of the Federal Highway Administration’s Manual on Uniform Traffic Control Devices (MUTCD).
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0108.5 MAG Spec. 108.5 – Limitations of Operations
Add new fifth and sixth paragraphs:
The on-site contractor shall confine all construction and employee operations to the site for which a permit has been issued. No employee parking, construction activity, or fabrication shall be allowed in public right-of-way or easements.
The contractor shall apply for an encroachment permit for utilizing public right-of-way for material storage or a construction office, except for work authorized by a right-of-way permit.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0211.2 MAG Spec. 211.2 – Fill Construction – Placing
Fourth paragraph, revise last sentence to read as follows:
However, such material shall not be placed within 3 feet of the finished subgrade of the fill.*
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0211.3 MAG Spec 211.3 – Fill Construction – Compacting
Fifth paragraph, revise last sentence to read as follows:
Each layer shall be compacted to a uniform density of not less than 95 percent, or as directed by the Engineer.
Sixth paragraph, revise first sentence to read as follows:
When fill material contains by volume over 25 percent of rock larger than 6 inches in the greatest dimension, the fill (up to 4 feet below finished subgrade) may be constructed in layers of a loose thickness not exceeding the maximum size of rock in the material. In no case shall such layers exceed 3 feet in thickness.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0301.3 MAG Spec. 301.3 – Sub-Grade Preparation – Relative Compaction
Revise paragraph to read as follows:
The subgrade shall be scarified and loosened to a depth of 9 inches. When fill material is required, a layer of approximately 3 inches may be spread and compacted with the subgrade material to provide a better bond. The subgrade cut and fill areas shall be constructed to achieve a uniform soil structure having the following density when tested in accordance with AASHTO T-99, Method A; T-191 or ASTM D-2922; and D-3017 with the percent of density adjusted in accordance with the rock correction procedures for maximum density determination, standard detail No. 190, to compensate for the rock content larger than that which will pass a No. 4 sieve:
|
a. |
Major streets |
95 percent |
|
b. |
Other streets and traffic ways |
95 percent |
|
c. |
Curbs, gutter and sidewalks |
90 percent |
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0310.2 MAG Spec. 310.2 – Untreated Base – Placing
Fourth paragraph, revise to read as follows:
Untreated base may vary not more than 1/4 inch above or below required grade and cross-section.
Untreated base compaction shall be 95% under curb/gutter, sidewalk, driveway and alley entrances, handicap ramps, and catch basins.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0311.2 MAG Spec. 311.2 – Soil Cement Base Course – Materials
Second sentence, revise to read as follows:
The soil for the mixture shall consist of the material in the area to be paved or approved selected material.
Last sentence, revise to read as follows:
The cement content shall be determined by the procedures set forth in AASHTO T136-50 or ASTM D560-67. The selection of a cement content based on compressive strength requirements without regard to freeze-thaw durability will not be allowed.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0311.4 MAG Spec. 311.4 – Soil Cement Base Course – Construction Methods
Second paragraph, revise to include the following:
Soil cement base course shall not be mixed with or placed on any frozen material; at the time of mixing and placing, the air temperature shall be 40°F (5°C) and rising, and the surface temperature shall be 45°F (10°C). The soil cement base course shall be protected from freezing for a minimum period of seven (7) days.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0321.5 MAG Spec. 321.5 – Asphaltic Concrete Paving – Placing, Spreading and Finishing
Add the following paragraphs after the first paragraph:
Asphalt concrete shall only be placed upon a surface of at least 70°F. The temperature of the asphalt concrete of any course, just prior to the dumping of the material from the hauling vehicle, shall be at least 265°F; a lower temperature is allowed if written approval is given by the Engineer. Compaction and finishing shall be completed before the mix has cooled to 180°F. The Engineer may authorize placement of asphalt concrete upon surfaces having a temperature of 45°. For above, providing those mentioned above and the following conditions are met.
a. The underlying surface is dry.
b. The weather is dry and without threat of precipitation.
c. The temperature of the asphalt concrete mixture is such that the sum of the air temperature plus the temperature of the mixture when placed is at least 310°F.
d. Asphalt concrete shall not be placed on grade that appears to be frozen unless specifically authorized by the Engineer.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0321.5.3 MAG Spec. 321.5.3 – Asphaltic Concrete Pavement – Leveling Course
Seventh paragraph, revise second sentence to read as follows:
An acceptable surface shall not vary more than 1/2 inch from the lower edge of a 10 foot straightedge when placed parallel to the centerline of the roadway.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0321.5.4 MAG Spec. 321.5.4 – Asphaltic Concrete Pavement – Asphalt Base and Surface Course
Third paragraph, revise fourth sentence to read as follows:
The transverse surface joints shall be tested with a 10 foot straightedge and shall conform to the requirements herein for acceptable surface tolerance.
Delete seventh paragraph (beginning with "When more than one width...").
After the eleventh paragraph, revise to include the following:
Finish rolling shall be started after the pavement has cooled sufficiently to permit removal of the roller marks, and shall be continued in whatever direction is necessary to produce a pavement surface free of indentations.
Twelfth paragraph, revise second sentence to read as follows:
An acceptable surface tolerance shall not vary more than 1/4 inch from the lower edge of a 10 foot straightedge when placed parallel to the centerline of the roadway.
Twelfth paragraph, the second sentence, revise to include the following:
The following transverse surface tolerance shall apply at right angles to the centerline where the plans call for a straight transverse grade. The transverse surface shall not vary more than one-quarter of an inch from the lower edge of a 10 foot straightedge when placed at right angles or radially to the centerline where the approved plans call for a uniform transverse finish grade. This surface specification shall not apply where the plans call for a break in transverse grade, such as at a roadway crown or swale.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0321.6 MAG Spec. 321.6 – Asphaltic Concrete Pavement – Corrective Requirements for Deficiencies
Third paragraph, revise first sentence to read as follows:
When the deficiency of the pavement thickness exceeds 1/2 inch, the pavement shall be overlaid on the area affected. In no case shall this overlay be less than one City block or 660 feet in length, whichever is less. This overlay shall be placed over the full width of pavement with a new mat of material specified by the Engineer; equal in thickness to the deficiency, but not less than 1 inch in any instance.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0330.2.1 MAG Spec 330.2.1 – Asphalt Chip Seal – Materials – Asphalt
Revise to include the following:
Emulsified asphalt Type CRS-2P shall be used for the chip seal coat.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0330.3 MAG Spec 330.3 – Asphalt Chip Seal – Time of Application and Weather Conditions
Second paragraph, revise second sentence to read as follows:
The ambient air temperature shall be at least 70°F and rising.
Third paragraph, revise to read as follows:
Asphalt chip seal shall be performed between June 1 and August 31 unless specifically permitted otherwise by the City Engineer.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0330.4.8 New Sub-Title: MAG Spec 330.4.8 – Asphalt Chip Seal – Protection to Adjacent Property
Revise to include new subsection as follows:
The Contractor shall protect all manhole covers, water valve boxes, survey monuments, and/or other man-made features so that no bituminous material or cover material remains and so that covers can be easily accessed after sweeping. All adjacent sidewalks and driveways shall be swept and maintained clear of loose cover material.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0336.2.1 MAG Spec 336.2.1 – Pavement Widening or Extensions
First paragraph, revise second sentence to read as follows:
The minimum depth of the cut shall be four (4) inches or Depth/4, whichever is greater.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0336.2.3 MAG Spec 336.2.3 – Temporary Pavement Replacement
Temporary pavement replacement, as required in Section 601, shall be with UPMTM or an approved equal with a minimum thickness of two (2) inches and shall conform to the following requirements:
DESCRIPTION:
1. The paving material shall be composed of an aggregate, as specified herewith, and plant mixed with Unique Paving Material (U.P.M.tm) liquid asphalt blend from the Sylvax Corporation or approved equal. The bituminous material shall be capable of coating wet aggregates without stripping, shall be available in various grades, and permit any one grade to be stockpiled and remain pliable and workable at a temperature of -15°F for a minimum period of 12 months.
2. The paving material shall be capable of maintaining adhesive qualities in an uncovered stockpile or in paved areas, which were damp or wet at the time of application, for a minimum period of 12 months.
MATERIALS:
1. The aggregate gradation shall meet the following requirements:
|
Sieve Size |
% Passing |
|---|---|
|
3/8 inch |
100 |
|
No. 4 |
85-100 |
|
No. 8 |
10-40 |
|
No. 16 |
10 |
|
No. 50 |
0-5 |
|
No. 200 |
2 maximum |
2. The aggregate shall also meet the following criteria:
|
Sand equivalent |
45 min. |
|---|---|
|
Crushed faces |
70% min. |
|
Flakiness index |
25 max. |
|
Absorption |
1.0 – 2.5% |
|
Specific gravity |
2.55 – 2.75% |
3. Bituminous material:
The bituminous material shall be UPMTM liquid asphalt blend from the Sylvax Corporation or approved equal. When prepared from a base asphalt stock of either AC-10 or AC-20 and blended, it shall meet the following requirements:
|
Flash point (TOC) |
200°F (94°C) min. |
|
Kinematic Viscosity @ |
140°F (60°C) 1,000 – 4,000 cSt |
|
Water |
0.2% max. |
Distillate Test
(volume of original sample)
|
To 437°F |
0% |
|
To 500°F |
0 – 55% |
|
To 600°F |
0 – 20% |
|
Residue from Distillate @ 680°F |
78 – 95% |
Residue Test:
|
Absolute Viscosity @ 140°F |
125 poises |
|
Penetration |
200 min. |
|
Ductility @ 39°F |
100 min. |
|
Solubility in Trichloroethylene |
99% min. |
4. Composition of Mixture:
The mixture shall consist of an aggregate as specified and a bituminous material as specified mixed in such a manner as to contain approximately 6% of bituminous material per finished ton.
5. Preparation of Mixture:
The asphalt shall be heated to a temperature between 150°F and 300°F and mixed with the heated aggregate until all aggregates are uniformly coated. The mixed temperature shall not exceed 170°F.
6. Plant and Equipment:
A batch-type mixer of approved design and capacity shall be used in mixing the ingredient materials.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0336.2.4 MAG Spec. 336.2.4 – Pavement Matching and Surface Replacement – Permanent Pavement Replacement
Tenth paragraph, revise first sentence to read as follows:
The surface course shall consist of an asphalt concrete material in accordance with Section 710 as specified by the engineer to match the existing surface.
Last paragraph, revise to read as follows:
Where deep lift asphalt concrete (asphalt concrete base and asphalt concrete wearing course) exists, the base course replacement shall be made in lifts not exceeding 4 inches in compacted thickness to within 1-1/2 inch of the finish grade.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0340.2 MAG Spec. 340.2 – Concrete Curb, Gutter, Sidewalk, Driveway and Alley Entrance – Materials
First paragraph, revise to read as follows:
Concrete shall be Class A, containing 5 to 7% air entrainment, and conforming to applicable requirements of Section 725.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0340.3 MAG Spec. 340.3 – Concrete Curb, Gutter, Sidewalk, Driveway and Alley Entrance – Construction Methods
Seventeenth paragraph, revise to include the following:
The longitudinal extent of any curb and gutter removal, replacement necessary because of nonconformity with the plans or specification, and replacement due to damage prior to acceptance shall not be less than the appropriate contraction joint spacing.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0342.2.1 MAG Spec 342.2.1 – Decorative Pavement – Sand Aggregate Base Course
Revise paragraph to read as follows:
The sand laying course shall be clean washed concrete sand conforming to ASTM C-33. The mortar sand shall be clean washed sand conforming to ASTM C-144. The aggregate base course shall be aggregate base in accordance with MAG Section 702.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0342.2.4 MAG Spec. 342.2.4 – Decorative Pavement – Brick
Revise paragraph to read as follows:
Brick shall not be used for decorative pavement.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0342.3.3 MAG Spec. 342.3.3 – Decorative Pavement – Header
Revise paragraph to read as follows:
The header shall be a Class A concrete with 5 to 7% air entrainment, and in accordance with Section 725.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0342.3.4 MAG Spec 342.3.4 – Decorative Pavement – Concrete Paving Stones
First paragraph, revise to read as follows:
The concrete paving stones shall be installed on the undisturbed sand laying course with gaps of 1/16 to 1/8 of an inch between each stone and adjacent stones or retention curb. After the stones are in place, a plate vibrator compactor shall be used to compact the stones. This will require two passes at 90 degrees to each other. After this operation, approximately 1/4 inch of mortar sand will be placed on the stones followed by a minimum of two passes with the compactor. Any excess sand shall be swept into the joint and/or removed. The completed installation shall be washed down and cleaned. Any cutting of the pavement stone shall be accomplished with a saw.
Second paragraph, revise to read as follows:
The contractor shall lay the paving stones starting from the longest straight line and from a true 90 degree corner. If the corner of the edge retention is not a true 90 degree corner, the paving stones must be laid slightly away (about half the length of a brick) from the edge at a 90 degree angle.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0342.3.6 MAG Spec. 342.3.6 – Decorative Pavement - Sand Laying Course
Revise paragraph to read as follows:
The thickness of the sand laying course shall be 1 inch, and screeding boards shall be used to ensure a uniform thickness. The sand shall not be compacted or walked on, and should be wet enough to cling together when compressed lightly in the hand and not fall apart when the hand is reopened.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0345.2 MAG Spec. 345.2 – Adjusting Frames, Covers, Valve Boxes, and Water Meter Boxes – Adjusting Frames
Second paragraph, revise third sentence to read as follows:
Class A concrete, with 5 to 7% air entrainment, shall be placed around and under the frames to provide a seal and properly seat the frame at the required elevation and slope.
For new manholes, the maximum dimension from top of lid to the top of the cone shall be 22". The maximum dimension from the top of the lid to the bottom of the flat top shall be 24".
For existing manholes to be raised in previously paved areas, the maximum dimension from the final finished grade to the bottom of the manhole neck shall be 28 inches. It is the contractor’s responsibility to examine each existing manhole and determine the exact nature of the work required to adjust each manhole.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0345.3 MAG Spec 345.3 – Adjusting Frames, Covers, Valve Boxes, and Water Meter Boxes – Adjusting Valve Boxes
Second paragraph, revise second sentence to read as follows:
Any excavated area shall be filled with Class A concrete, with 5 to 7% air entrainment, in accordance with the standard detail, or as directed by the Engineer.
Third paragraph, revise second sentence to read as follows:
This collar shall be of Class A concrete with 5 to 7% air entrainment.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0401.5 MAG Spec. 401.5 – Right-of-Way and Traffic Control – General Traffic Regulations
Eleventh paragraph, revise to read as follows:
The contractor will reinstall all permanent traffic control devices as required by the approved construction plans and specifications.
Twelfth paragraph, revise to read as follows:
Existing traffic signs, including stop, yield and street name signs, shall be maintained by the contractor until such time as construction renders them obsolete. The contractor shall be responsible for furnishing and installing all permanent traffic signs as required by the construction plans and specifications.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0405.2 MAG Spec. 405.2 – Monuments – Materials
Second paragraph, revise to read as follows:
All concrete shall be Class A with 5 to 7% air entrainment.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0505.3 MAG Spec. 505.3 – Concrete Structures – Forms
Tenth paragraph, revise to read as follows:
The contractor may, with the permission of the engineer, pour such portions of the concrete for the structure directly against the side of the excavation or sheathing without the use of outside forms, provided that the following conditions are met.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0505.6 MAG Spec. 505.6 – Concrete Structures – Placing Concrete
First paragraph, add the following after the first sentence:
No concrete shall be placed without the approval of the City Inspector.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0505.6.2 MAG Spec. 505.6.2 – Concrete Structures – Adverse Weather Concreting
Subsection (B), revise to include the following:
Concrete operations shall not be continued when a descending air temperature in the shade and away from artificial heat falls below 40°F, nor shall concrete operations be resumed until an ascending air temperature in the shade and away from artificial heat reaches 35°F.
Mixing and placing concrete shall continue no later in any day than to allow sufficient time to place and protect the concrete already placed before the air temperature drops to 35°F.
Concrete operations may be allowed although the air temperature in the shade away from artificial heat is below the limit permitted above. Where concrete operations are thus allowed, the contractor shall use equipment to heat the aggregates, or water, or both, prior to mixing. Aggregates shall be uniformly heated to at least 60°F and shall have no chunks of ice. Equipment used to heat the aggregates shall obtain uniform temperature throughout the aggregate within each batch and from one batch to another. Water shall not be heated in excess of 150°F.
The contractor shall provide adequate protection via insulation, heat, or both, for the concrete after placement. This protection shall be to the extent required to maintain a temperature under the insulation of 60°F to 90°F for a period of 72 hours after placement, and from 40°F to 90°F for an additional 96 hours. Regardless of the air temperature at the time of mixing and placing the concrete, the protection specified above shall be provided at all times when the air temperature is below 35°F.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0601.2.3 MAG Spec. 601.2.3 – Water and Sewer – Trench Grade
First paragraph, revise the first sentence to read as follows:
Alignment and elevation stakes shall be furnished by the contractor at a minimum of 50 foot intervals and agreed upon offsets.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0601.2.9 MAG Spec. 601.2.9 – Water and Sewer – Trench Excavation, Backfill and Compaction – Shoring and Sheeting
Revise to include the following:
It shall be the contractor’s responsibility to provide such trench bracing, sheeting, or shoring as may be necessary to protect existing improvements outside the trench and to support and ensure the ground alongside the excavation will not slide or settle. Existing improvements outside the trench, either public or private, damaged due to lack of adequate trench bracing, sheeting, or shoring shall be removed and replaced in kind at the Contractor’s expense.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0601.4.3 MAG Spec. 601.4.3 – Trench Excavation, Backfill and Compaction – Backfill
Second paragraph, revise to read as follows:
Water consolidation (flooding, jetting, or other discharge) will not be permitted.
Fourth paragraph, revise to read as follows:
When mechanical compaction is used, backfill shall be placed in lifts not exceeding one foot in compacted height, regardless of pipe size, material, or backfill type.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0601.4.4 MAG Spec. 601.4.4 – Water and Sewer - Trench Excavation, Backfill and Compaction – Compaction Densities
Table 601-2, revise to read as follows:
|
Backfill Type |
Location |
From Subgrade to 2' Below Subgrade |
From 2' Below Subgrade to 1' Above Top of Pipe |
From 1' Above Top of Pipe to Bottom of Trench |
|---|---|---|---|---|
|
I |
Under any existing or proposed pavement, curb, and gutter, sidewalk, or such construction included in the contract; or when any part of the trench excavation is within 2' of the above. |
100% for Granular 95% for Nongranular |
95% |
95% |
|
II |
On any utility easement, street, road or alley right-of-way outside limits of (I) |
90% |
90% |
95% |
|
III |
Around any structures or exposed utilities. |
95% |
In all cases |
|
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0610.10 MAG Spec. 610.10 – Connection to Existing Mains
Revise second-to-last paragraph to read:
When a shutdown of an existing water main is necessary in order to connect the new lines, the contractor shall make application and pay the required charges to the contracting agency (City of Flagstaff Utilities Division). A conference between the contractor’s representative, Public Works inspection, and water distribution personnel shall establish the timeline and procedures to ensure that the shutdown will be the shortest possible time (8 hours maximum). If necessary to minimize the inconvenience to customers, shutdowns may be scheduled during other than normal working hours. The water supply to some customers, such as hospitals, may not be shut off at any time. Provisions to furnish a continuous supply of water to such establishments will be required. After the procedures and time for a shutdown are agreed upon, it shall be the contractor’s responsibility to notify all affected customers, in advance, that the water will be turned off. Customers shall be notified no less than forty-eight (48) hours in advance except for emergency situations. Notification shall be in writing giving the reason for the shutdown and the time and duration the water services will be shut off. All shutdown notifications to the customers must be approved by Public Works inspection and water distribution personnel.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0625.3 MAG Spec. 625.3 – Manhole Construction and Drop Sewer Connections – Construction Methods
First sentence, revise to read:
Manholes shall be constructed of precast concrete sections with frames and covers in accordance with the standard details; bricks will be allowed only when authorization has been granted to repair rather than replace an existing brick manhole.
Add the following supplemental text:
Flow channel
Flow channels straight through a manhole shall be made to conform as closely as possible in shape and slope to that of the connecting sewers. The channel wall shall be formed or shaped to the full height of the crown of the outlet sewer in such a manner to not obstruct maintenance, inspection, or flow in the sewers. When curved flow channels are specified in manholes, including branch inlets, slopes shall be increased to maintain acceptable velocities.
Bench
A bench shall be provided on each side of any manhole channel when the pipe diameter(s) are less than the manhole diameter. The bench shall be sloped to provide a minimum 3" fall from the top of the bench to the crown of the pipe or 1/2" per foot, whichever is greater. No lateral sewer service connections or drop manhole pipe shall discharge onto the surface of the bench.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0702.1 MAG Spec. 702.1 – Base Materials – General
Revise to include the following:
The aggregate base course will be clean, free of organic matter, and be of such a nature to be compacted to a dense, firm layer capable of supporting loaded trucks and self-propelled pavers without rutting. Volcanic cinders shall not be used for base materials.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0702.2.2 MAG Spec. 702.2.2 – Base Materials – Crushed Aggregate – Grading
Table 702, revise to read as follows:
For aggregate base, the percentage by weight passing the No. 200 sieve shall be limited to no more than 10 percent.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0710.2.1 MAG Spec. 710.2.1 – Asphaltic Concrete – Material – Asphalt Binder
Revise paragraph to read as follows:
The asphalt to be mixed with the mineral aggregate shall be paving grade asphalt conforming to AASHTO Designation MP1, Standard Specification for Performance Grade Asphalt Binder and shall be 58-28 unless otherwise specified in the special provisions. AC 20 conforming to Section 711 may be used if PG 58-28 is not available.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0710.2.2 MAG Spec. 710.2.2 – Asphalt Concrete - Aggregate
Add the following sentence to the end of the first paragraph:
Volcanic cinders or materials containing clay balls, coated rock or other deleterious materials shall not be used.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0710.3.1 MAG Spec. 710.3.1 – Asphalt Concrete – Mixed Design Requirements - General
Revise to include the following:
The contractor shall furnish the engineer with a job-mix formula for asphalt concrete not less than ten (10) days in advance of actual placement of the material. The job-mix formula, upon approval of the Engineer, shall be used to establish the standards to which field test results will be compared and to determine compliance of the materials furnished with all physical properties of the composite mix and its individual components as shown on the approved job-mix formula. The job-mix formula, with the allowable tolerances for a single test shall be used for monitoring compliance with the specifications.
The maximum permissible variation in the daily Marshall Plug unit weight from the unit weight shown in the approved job-mix shall be +/- 3%. If the unit weight of the Marshall Plug deviates from the permissible variation by more than 1%, payment will be reduced in accordance with Table 321-2.
The aggregate and mix to be incorporated into the work shall also meet the following requirements:
|
TEST |
ACCEPTABLE TEST RESULTS |
|---|---|
|
Loss on Abrasion (ASTM C0131 and/or AASHTO 96) after 500 revolutions |
40 Max. |
|
Absorbed Asphalt Range (AASHTO T-245) |
0 – 1% |
|
Combine Water Absorption (AASHTO T-84) |
0 – 2.25% |
All asphaltic concrete shall contain a minimum of 1% Portland Cement or dry hydrated lime by weight of total mixture.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0710.3.2.1 MAG Spec 710.3.2.1. – Asphalt Concrete – Mix Design Requirements – Marshall Mix Design
Revise the percent of asphalt range for B-1 and three-quarter (3/4) inch asphaltic concrete from five percent (5%) to six percent (6%) to five and three-tenths percent (5.3%) to six percent (6%).
Revise Table 710-3 as follows:
6. Dry Tensile Strength: psi, Min. from 100 to 65 for all mixes
7. Stability: pounds, Min. 1/2" and 3/4" mixes, from 2,500 to 2,000
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0710.4.2 MAG Spec 710.4.2 – Asphalt Cement Content
Revise the first sentence of the second paragraph to read:
The asphalt cement content shall be considered acceptable if it is within -0.30% or +0.40% of the mix design target value.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0713.1 MAG Spec. 713.1 – Emulsified Asphalts – General
Revise to include the following:
|
Test Description |
Test Method |
Min |
Max |
|---|---|---|---|
|
TEST OF EMULSION |
|
|
|
|
Viscosity, SFS @ 122 F |
D244 |
125 |
400 |
|
Settlement, 5 days, % |
D244 |
|
5 |
|
Storage Stability 1 Day, % |
A244 |
|
1 |
|
Class, Un-coated Par |
A502 |
60 |
|
|
Particle Charge Test |
D244 |
|
+ |
|
Sieve Test, % |
D244 |
|
0.30 |
|
Oil Distillate, % V of Emulsion |
D244 |
|
3 |
|
Residue by Distillation, % |
D244 |
66 |
|
|
Tests on Residue by VACUUM RECOVERY A512 |
|
|
|
|
Viscosity, ABS, Poise @ 140 F |
D2171 |
1,800 |
2,800 |
|
Pen @ 77F, 100g/5 sec, Dmm |
D5 |
40 |
90 |
|
Ductility, 77F, 5 cm/min, Cm |
D113 |
40 |
|
|
Solubility in TCE, % |
D2042 |
97.5 |
|
|
Toughness, inch-pounds |
(1) |
150 |
|
|
Elastic Recovery by means of Ductilometer, % |
T301 |
58 |
|
|
Tenacity, inch-pounds |
(1) |
110 |
|
|
Polymer Content (by wt. Of solids) % |
CAL-401 |
2.5 |
|
|
TEST ON RTFO RESIDUE |
|
|
|
|
Aging Ratio, ABS viscosities |
D2171 |
|
2.5 |
|
POLYMER REQUIREMENTS |
|
|
|
|
Melt flow rate, dg/min 190 C |
D1238 |
|
45 |
1) Benson method of toughness and tenacity: Scott tester, inch-pounds @ 77°F, 20 inches per minute pull. Tension head 7/8" diameter.
2) Upon standing undisturbed for a period of 24 hours, the emulsion shall show no white milky film upon the surface.
3) The base asphalt shall be modified prior to emulsification.
4) The emulsion shall be precertified prior to use. A one-quart sample each of the base asphalt and polymer shall be supplied to the agency 10 days in advance to the project start.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0716.2.1 MAG Spec 716.2.1 – Cover Material – Stone Chips – General
First paragraph, revise to include the following:
No volcanic cinders will be acceptable for cover material.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0716.2.3 MAG Spec. 716.2.3 – Cover Material – Stone Chips – Gradation
Tables 716-1 and 716-2, revise to read as follows:
|
|
% passing sieve |
|---|---|
|
3/8 inch |
100 |
|
No. 4 |
0-40 |
|
No. 8 |
0-5 |
|
No. 200 |
0-2.0 |
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0725.1 MAG Spec. 725.1 – Portland Cement Concrete – Classes of Concrete
Revise to read as follows:
As tested in accordance with ASTM C-39, the maximum slump shall be 4 inches, or as specified in the special provisions, when tested in accordance with ASTM C-143.
Class AA concrete, with 5 to 7% entrained air, shall be used for all valley gutters and as specified.
Class A concrete shall be used for concrete structures, either reinforced or nonreinforced. Additionally, Class A concrete with 5 to 7% entrained air shall be used for all curbs, gutters, sidewalks, and exposed structures except as may be specified otherwise.
Class B concrete shall be used as specified, except 5 to 7% entrained air shall be included for all exposed structures.
Class C concrete may be used for thrust blocks, encasements, fill or over excavation, and/or other purposes as approved.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0725.3 MAG Spec. 725.3 – Portland Cement Concrete – Aggregates
First paragraph, after the second sentence, revise to include the following:
Aggregates must be subjected to five cycles of the sodium sulfate soundness test in accordance with the requirements of AASHTO T-104. The total loss shall not exceed ten percent by weight of the aggregate as a result of the test.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0725.5 MAG Spec. 725.5 – Portland Cement Concrete – Water
Last paragraph, revise to include the following:
Water shall be sampled and tested in accordance with AASHTO T-26.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0750.2 MAG Spec 750.2 – Iron Water and Pipe Fittings, Ductile Iron Water Pipe
Revise the second paragraph to read:
Pipe shall be lined with Protecto 401 ceramic epoxy.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0750.3 MAG Spec 750.3 – Iron Water and Pipe Fittings, Joint Requirements
Only Megalug or Bell joint are acceptable types of joint restraints.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)
13-21-001-0760.1 MAG Spec. 760.1 – Coating Corrugated Metal Pipe and Arches – General
Revise to include the following:
All corrugated metal, spiral rib, and helical pipe and arches shall be a minimum of 14 Ga. aluminized steel Type II.
(Ord. 2017-22, Rep&ReEn, 07/05/2017)