PIMA COUNTY DEPARTMENT OF TRANSPORTATION
SPECIFICATIONS SUPPLEMENT NUMBER 1
SPECIFICATIONS:
The work embraced herein shall be done in accordance with the City/County Standard Specifications, 1994 Edition, together with these Specification Supplements which are additional to and may supersede portions of the Standard Specifications.
GENERAL REQUIREMENTS:
The base or sub-base upon which the asphaltic concrete is to be placed shall be prepared and maintained smooth, firm, and in reasonable close conformity to the lines, grades, and dimensions established or shown on the plans.
When asphaltic concrete is being placed on a primed or paved surface, the surface to be paved shall be swept clear of loose dirt and other objectionable material.
A light coat of bituminous material (tack coat) shall be applied as directly to edges or vertical surfaces against which asphaltic concrete is to be placed.
MATERIALS:
The asphaltic concrete and mineral aggregate shall conform to the requirements of Section 406, Mix No. 2, unless otherwise designated by the Engineer and shall be approved Pima County Department of Transportation or Arizona Department of Transportation mixes. The asphaltic cement shall meet the requirements of PG Grade 70-10 oils.
Gradation/Percent Passing of the Sieve Analysis shall be as follows:
Sieve Size Percent Passing
3/4 inch 100
inch 90-100
3/8 inch 70-85
#4 54-68
#8 44-52
#40 13-23
#200 3-8
PLACING AND FINISHING:
The asphaltic concrete shall be placed at a minimum of 250 degrees Fahrenheit and may be spread by hand. Asphaltic Concrete shall be compacted in lifts not to exceed three (3) inches in thickness.
COMPACTION:
Rolling shall be accomplished by means of tandem steel wheel rollers, vibratory steel wheel rollers, pneumatic rollers, or a combination of any or all three. All rollers must be approved by the Engineer prior to the start of construction.
Compaction shall be accomplished using tandem steel wheel rollers, vibratory steel wheel rollers, pneumatic rollers, or any combination thereof. All compaction equipment shall be adequate to accomplish the required density and shall be approved by the Engineer prior to the start of paving.
The asphaltic concrete shall be compacted to a minimum 95% of the laboratory compacted density as determined by ADOT 410C. Cores shall be taken to indicate pavement compaction. Care shall be taken by the contractor not to cause cracking or other damage to the existing and new pavement. Pavements which have been damaged shall be removed and replaced.
SURFACE TOLERANCES:
The pavement surface shall not vary more than one-eighth inch from the lower edge of a ten foot straightedge when the straightedge is placed parallel to the centerline of the roadway.
The contractor shall have an approved metal straightedge, ten feet long, on the site during all paving operations.
PIMA COUNTY DEPARTMENT OF TRANSPORTATION
SPECIFICATIONS SUPPLEMENTS NUMBER 2
SCOPE:
Aggregate Base Course shall consist of furnishing and placing an aggregate material as a base for pavement or surface course for alleys or roadway shoulders.
SPECIFICATIONS:
The work embraced herein shall be done in accordance with City/County Standard Specifications, 1994 Edition, Section 303, together with these Specifications Supplements which are additional to and may supersede portions of the Standard Specifications.
MATERIALS:
Aggregate for aggregate bases shall consist of stone, gravel or other approved inert material of similar characteristics, and shall be clean and free from vegetable matter and other deleterious substances. The gradation and maximum plasticity index shall be as follows:
Sieve Size Percent Passing Maximum P. I.
1" 100
3/4" 90-100 5
1/4" 45- 75
#200 2- 10
The sum of the PI and the percent passing the #200 sieve shall be a minimum of 5.
PLACING AND FURNISHING:
The Aggregate Base may be placed by hand when it is impractical to place by mechanical methods. After final compaction, the surface of the Aggregate Base Course shall be in close conformity to the lines, grades, and dimensions established, or shown on the plans.
Aggregate base material shall be placed in uniform layers not to exceed six inches in compacted thickness. The finished surface shall not vary by more than one-half inch from the required grade and cross-section.
SPECIFICATIONS SUPPLEMENT NUMBER 2
AGGREGATE BASE COURSE
COMPACTION:
Compaction shall be accomplished by means of approved mechanical devices. All compaction devices must be approved by the Pima County Engineer prior to the start of construction.
Each layer of Aggregate Base Course shall be compacted to a minimum of 100% of the maximum density as determined by the applicable test method in the Arizona Department of Transportation Materials Testing Manual.
SPECIFICATIONS SUPPLEMENTS NUMBER 3
SCOPE:
Select material shall consist of furnishing and placing an aggregate material as a sub-base for pavement.
SPECIFICATIONS:
The work embraced herein shall be done in accordance with the City/County Standard Specifications, 1994 Edition, Section 501, together with these Specification Supplements which are additional to and may supercede portions of the Standard Specifications.
MATERIALS:
In the roadway prism, material placed below finish subgrade elevation, designated as select material, shall conform to the requirements of Section 501-2.06 of the Standard Specifications. The gradation shall be as follows:
Sieve Size Percent Passing
3 inch 100
3/4 inch 60-100
#8 35-80
#200 Sum of percent passing #200
sieve, plus P.I. is less or equal to 25.
With the Engineer=s approval, aggregate base course material may be used below finish subgrade.
COMPACTION:
The select material shall be compacted to a minimum of 95% of the maximum density as determined by the applicable methods in the Arizona Department of Transportation Materials Testing Manual.
SPECIFICATIONS SUPPLEMENT NUMBER 4
SCOPE:
Double chip seal shall consist of furnishing and placing a liquid or emulsified asphalt and crushed cover aggregate in two (2) courses to form a pavement replacement surface course.
SPECIFICATIONS:
The work embraced herein shall be done in accordance with the City/County Standard Specifications, 1994 Edition, Section 404, together with these Specification Supplements which are additional to and may supersede portions of the Standard Specifications.
GENERAL REQUIREMENTS:
The surface to be seal coated shall be thoroughly cleaned prior to applying the bituminous material or slurry.
The aggregate shall be uniformly and immediately spread over the freshly applied bituminous materials by means of a self-propelled, continuous feed aggregate spreader. The cover material shall be wet, but free of running water at the time of spreading.
Traffic of all types shall be kept off the seal coat until it has had time to set
TIME OF APPLICATION AND WEATHER CONDITIONS:
Liquid or emulsified asphalt shall be applied only when the surface is dry. The ambient temperature at the time of application shall be 70 degrees Fahrenheit and rising.
MATERIALS:
Sieve Size Percent Passing
3/8 Inch 100
No. 4 0-25
No. 8 0- 5
No. 200 0- 2
The percent of crushed faces shall be at least 70% when tested in accordance with the requirements of Arizona Test Method 212.
The Flakiness Index shall be a maximum of 25.
Bituminous material shall be cationic rapid set emulsified asphalt Type CRS-2, or unless specified in the Special Provisions.
PLACING AND FINISHING:
The bituminous material shall be applied in conformance with Section 404 of the Standard Specifications. A self-propelled bituminous distributor truck must meet the approval of the County Engineer.
The bituminous material shall be applied at a rate of 0.25 - 0.30 gallon per square yard for each application. This rate may be adjusted to fit field conditions as per the Pima County Engineer.
The cover aggregate shall be applied in conformance with Section 404 of the Standard Specifications. The cover aggregate may be spread by hand methods when approved by the Pima County Engineer.
The cover aggregate shall be spread at 25 pounds per square yard for each application immediately after the bituminous material has been applied. This rate may be adjusted to fit field conditions as directed by the Pima County Engineer.
ROLLING:
The cover aggregate shall be rolled as soon as it has been spread over the bituminous material. Rolling shall be accomplished by pneumatic tire roller(s). The roller(s) to be used shall be approved by the Pima County Engineer prior to the start of work.
A minimum of three (3) passes shall be required to complete the rolling process.
REMOVING LOOSE COVER MATERIAL:
All loose cover material shall be removed from the paved surface by brooming, in not less than 4 hours nor more than 36 hours after application.
Brooming shall be done by power brooms of the rotary type, equipped, maintained, and operated so that the bristles are of reasonably uniform length and capable of cleaning without gouging or tearing the surface.
Brooming may be accomplished by hand methods when approved by the Pima County Engineer.
SPECIFICATIONS SUPPLEMENT NUMBER 5
SCOPE:
Cold Mix Asphalt shall consist of furnishing and placing a mixture of an aggregate material and a bituminous material to form a temporary pavement replacement surface course.
GENERAL REQUIREMENTS:
The base or sub-base upon which the cold mix asphalt is to be placed shall be prepared and maintained smooth, firm, and in reasonable close conformity to the lines, grades, and dimensions as shown in the plans.
WEATHER AND MOISTURE CONDITIONS:
No cold mix asphalt shall be placed when the weather is foggy or rainy, or when the base on which the material is to be placed contains moisture in excess of the optimum.
SPECIFICATIONS:
The work embraced herein shall be done in accordance with the City/County Standard Specifications, 1944 Edition, Section 1005, together with these Specification Supplements which are additional to and may supersede portions of the Standard Specifications.
MATERIALS:
Mineral Aggregate gradation shall be as follows:
Sieve Size Percent Passing
3/8" 100
# 4 70-100
# 8 45- 70
# 40 20- 40
#100 5- 15
#200 3- 8
Mineral aggregate shall consist of crushed gravel, rock, natural sand, sand prepared from rock, or other approved inert material with similar characteristics that conform to the gradation as shown above. The liquid asphalt (cut-back asphalt) shall be Grade
SPECIFICATIONS SUPPLEMENT NUMBER 5
COLD MIX ASPHALT
MC-250 or MC-800. The amount to be used shall be 6.5 to 7.5% of the total mixed material.
PLACING AND ROLLING:
The Cold Mix asphalt may be spread by hand.
Rolling shall be accomplished by means of a tandem steel wheel roller(s), vibratory roller(s), pneumatic roller(s), or other approved rolling methods.
SURFACE TOLERANCES:
The surface shall be as uniform as possible and not cause excessive discomfort to the traveling public.
CONTRACTOR'S RESPONSIBILITIES:
The contractor shall be responsible for maintaining the temporary patch until it is removed to install a permanent patch.
Permanent pavement repair shall be performed within fifteen (15) calendar days of the initial work or sooner if requested in writing to do so by the Pima County Engineer or his authorized representative.
SPECIFICATIONS SUPPLEMENT NUMBER 6
TACK COAT:
Tack Coat shall conform to Section 404-3.15 of the latest edition of the Standard Specification for Public Improvements.
Tack Coat shall consist of a CSS-1 or CSS-1h emulsified asphalt diluted 50/50 with water.
Tack Coat shall be applied to all joints (faces) of the pavement cut immediately prior to surfacing. Tack Coat shall be applied to the surface of asphaltic concrete when placed in compacted lifts.
Tack Coat shall be applied at a rate of 0.10 gallon per square yard.
Tack Coat may be applied by hand method when approved by the Pima County Engineer.
GRANULAR BACKFILL MATERIAL:
Granular Backfill Material shall mean material for which the sum of plasticity index and the percent of the material passing a # 200 sieve shall not exceed 25. Test methods shall be in accordance with the Arizona Department of Transportation Materials Testing Manual.
PIMA COUNTY DEPARTMENT
OF TRANSPORTATION AND FLOOD CONTROL DISTRICT
RIGHT OF WAY PERMIT FEE SCHEDULE
1. Public Right-of-Way Improvement Permit Fee
a. Base permit fee for work in the public right of way: $45.00
b. Driveway repairs and installation and unimproved property improvements up to 5 feet by 5 feet: $25.00
c. Fees for general right-of-way improvements. The permit fees for all utility work, sidewalk installation, street excavation, improvements to unimproved portions of public right of way, curb cuts, driveway installations, and repairs, are as follows:
200 lineal feet or less: Base permit fee($45.00)
201 to 300 lineal feet: $60.00
301 to 500 lineal feet: $80.00
501 to 2500 lineal feet: $80.00, plus $14.00 for each additional 100 ln. ft. or fraction thereof above 500 lineal feet.
2501 lineal feet and above: $360.00, plus $80.00 for each additional 100 lineal feet or fraction thereof above 2501 lineal feet.
d. All other work: The permit fee for all other type of work in the public right-of-way , such as concrete structures, guard rail, slope protection, drainage channel work, roadway upgrading, etc: Base permit fee($45.00)
2. Construction inspection fee. In addition to the permit fee listed above a five percent (5%) construction inspection fee is required for any and all construction, reconstruction, improvement, repair, modification or removal of any transportation or flood control improvements within a public right-of-way. The construction inspection fee is calculated based on the total cost of the construction covered under the permit. The construction inspection fee is in addition to the right-of-way permit fees listed above.
Utility and telecommunications exception. The construction inspection fee does not apply to a permit for utility and telecommunications systems work done within public rights-of-way, provided, however, the number and detail of inspections performed by the County do not exceed those routinely conducted for utility work. The utility contractor shall provide to Pima County all necessary product material testing reports and product acceptance testing reports prepared by a Materials Testing laboratory approved by Arizona Department of Transportation. A copy of all laboratory test reports shall be submitted to Permit Inspections Section of the Department of Transportation promptly for all work done under this permit.
a. There is no separate inspection fees for review of construction materials test reports.
b. Addition inspections or complex review plan review: $35.00/hr.
3. Telephone or mail-in application: No additional charge
4. Oversize/overload vehicle permit: $15.00/Single-trip, one load
$45.00/30-day permit
5. Permit renewal: $25.00
6. Permit and Right-of-way Work Standards Booklets $2.50 each
7. Permit applicability. A permit covers only contiguous construction and the work to be done as one (1) continuous operation.
8. Permit expiration. Permits for work done pursuant to an approved subdivision improvement plan expire one hundred and eighty (180) days after the date of issuance. All other permits expire forty-five (45) days after the date of issuance. A permit may be renewed one time only, upon payment of the permit renewal fee. All right-of-way use permits must be renewed prior to or within 1 day after the date of permit expiration.
9. Fee for commencement of work without a permit. If any work within a public right-of-way is commenced prior to obtaining a permit, the fee for the permit is triple the applicable amount. The triple fee is not an offset to, or waiver of any costs, fines or penalties which may be assessed pursuant to Pima County Code Section 10.44.050