HomeMy WebLinkAboutORDINANCE 5914113 West Mountain Street
Fayetteville, AR 72701
(479)575-8323
Ordinance: 5914
File Number: 2016-0440
AMEND CHAPTER 6 PAVEMENT STRUCTURE AND MATERIALS:
AN ORDINANCE TO AMEND CHAPTER 6 PAVEMENT STRUCTURE AND MATERIALS OF
THE MINIMUM STREET STANDARDS MANUAL TO ALLOW ALLEYS TO BE CONSTRUCTED
WITH GRAVEL PAVEMENT SECTIONS IN CERTAIN CIRCUMSTANCES.
WHEREAS, Ordinance No. 5789, which was passed by the Fayetteville City Council on August 4, 2015,
adopted the Minimum Street Standards manual as part of the Unified Development Code and requires
City Council approval for amendments to those standards; and
WHEREAS, § 6.1.3 Standard Pavement Sections of the Minimum Street Standards manual currently
requires that the pavement section requirements for alley construction be the same as for a public roadway
unless alternative materials are approved by the City Engineer.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF
FAYETTEVILLE, ARKANSAS:
Section 1: That the City Council of the City of Fayetteville, Arkansas hereby amends § 6.1.4 Alleys of
the Minimum Street Standards Manual by appending the language below and renumbers the following
sections accordingly:
"Existing alley rights -of -way which have a grade less than 5% in all directions are exempt from the
requirements of this chapter and may be constructed in accordance with § 172.11(G), (H), and (I). Alleys
constructed in this manner shall use an angular surface gravel approved by the City Engineer for its ability
to maintain compaction.
When constructed, alternative pavements shall pass a proof rolling test conducted with a loaded dump
truck. The crown shall be constructed using best practices from the Federal Highway Administration
publication Gravel Roads and Maintenance. The City Engineer shall have the authority to require
Page 1 Printed on 1015116
Ordinance: 5914
File Number: 2016-0440
drainage measures such as underdrains and culverts where necessary. Maintenance windrows of pavement
materials shall not be allowed.
The City of Fayetteville shall not be responsible for maintaining alleys constructed in this manner."
PASSED and APPROVED on 10/4/2016
Attest:
t{itiilllfJ►lf`4
Sondra E. Smith, City Clerk Tr'gkiwr,l"i Y O,
U FAYETTEVILLE:
y
Page 2 Printed on 1015116
City of Fayetteville, Arkansas 113 West Mountain Street
Fayetteville, AR 72701
# 4 (479) 575-8323
Text File
File Number: 2016-0440
Agenda Date: 10/4/2016 Version: 1 Status: Passed
In Control: City Council Meeting File Type: Ordinance
Agenda Number: C. 10
AMEND CHAPTER 6 PAVEMENT STRUCTURE AND MATERIALS:
AN ORDINANCE TO AMEND CHAPTER 6 PAVEMENT STRUCTURE AND MATERIALS OF
THE MINIMUM STREET STANDARDS MANUAL TO ALLOW ALLEYS TO BE CONSTRUCTED
WITH GRAVEL PAVEMENT SECTIONS IN CERTAIN CIRCUMSTANCES
WHEREAS, Ordinance No. 5789, which was passed by the Fayetteville City Council on August 4,
2015, adopted the Minimum Street Standards manual as part of the Unified Development Code and
requires City Council approval for amendments to those standards; and
WHEREAS, § 6.1.3 Standard Pavement Sections of the Minimum Street Standards manual currently
requires that the pavement section requirements for alley construction be the same as for a public
roadway unless alternative materials are approved by the City Engineer.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF
FAYETTEVILLE, ARKANSAS:
Section 1: That the City Council of the City of Fayetteville, Arkansas hereby amends § 6.1.4 Alleys of
the Minimum Street Standards Manual by appending the language below and renumbers the following
sections accordingly:
"Existing alley rights -of -way which have a grade less than 5% in all directions are exempt from the
requirements of this chapter and may be constructed in accordance with § 172.11(G), (H), and (I). Alleys
constructed in this manner shall use an angular surface gravel approved by the City Engineer for its
ability to maintain compaction.
When constructed, alternative pavements shall pass a proof rolling test conducted with a loaded dump
truck. The crown shall be constructed using best practices from the Federal Highway Administration
publication Gravel Roads and Maintenance. The City Engineer shall have the authority to require
drainage measures such as underdrains and culverts where necessary. Maintenance windrows of
pavement materials shall not be allowed.
The City of Fayetteville shall not be responsible for maintaining alleys constructed in this manner."
City of Fayetteville, Arkansas Page 1 Printed on 101512016
Legistar ID No.:
AGENDA REQUEST FORM
FOR: Council Meeting of October 4, 2016
FROM:
City Council Member Matthew Petty
ORDINANCE OR RESOLUTION TITLE AND SUBJECT:
AN ORDINANCE TO AMEND CHAPTER 6 PAVEMENT STRUCTURE AND
MATERIALS OF THE MINIMUM STREET STANDARDS MANUAL TO ALLOW
ALLEYS TO BE CONSTRUCTED WITH GRAVEL PAVEMENT SECTIONS IN
CERTAIN CIRCUMSTANCES
APPROVED FOR AGENDA:
Matthew Petty
City Attorney Kit
(as to form)
S t ire r k-�,2kG
Date
Date
CITY OF
Tay -Ile
ARKANSAS
TO:
THRU:
FROM:
DATE:
CITY COUNCIL AGENDA MEMO
Mayor and City Council
Kit Williams, City Attorney
Matthew Petty, Ward 2 Alderman
September 16, 2016
SUBJECT: Ordinance No. . An ordinance to amend Chapter 6
Pavement Structure and Materials of the Minimum Street Standards
Manual to allow alleys to be constructed with gravel pavement sections
in certain circumstances.
BACKGROUND:
In 2015, Fayetteville adopted the Minimum Street Standards which define cross -sectional and
geometrical standards for alleys within the city. At a Planning Commission meeting in the first
quarter of 2016, several commissioners expressed dissatisfaction with current code language
which requires all alleys to be constructed to the same standards as city streets. Similarly, a
handful of developers have asked me why gravel alleys are not allowed when several already
exist in the city and appear to function adequately for all users.
DISCUSSION:
This ordinance allows alleys to be constructed to same standards as driveways. The alley right-
of-way must already exist and the alley must only be used for ingress/egress to properties; solid
waste service in gravel alleys will not be allowed.
Furthermore, the ordinance empowers the City Engineer to require drainage measures, such as
underdrains and culverts, to be installed where necessary. The ordinance also prohibits the
storage of surplus pavement material within the alley. The new alley must past a proof rolling test
with a loaded dump truck, in lieu of normal compaction testing. Finally, the City is not responsible
for maintaining such alleys.
BUDGET/STAFF IMPACT:
Budget: none.
Mailing Address:
113 W. Mountain Street www.fayetteville-ar.gov
Fayetteville, AR 72701
Mulford, Patti
From: Williams, Kit
Sent: Thursday, September 08, 2016 6:16 PM
To: Matthew Petty - Fayetteville Ward 2
Cc: Mulford, Patti
Subject: RE: Gravel alley ordinance
Matthew,
The next agenda has already been distributed. We will prepare this for the agenda following that. The only other
option would be for you to walk this on at the Agenda Session.
Kit Williams
Fayetteville City Attorney
479.575.8313
at swrrrrr
t �P
� P
From: Matthew Petty - Fayetteville Ward 2 [mailto:citycouncil@matthewpetty.org]
Sent: Thursday, September 08, 2016 2:01 PM
To: Williams, Kit <kwilliams@fayetteville-ar.gov>
Subject: Gravel alley ordinance
Hi Kit, can we prepare this for the next agenda? Or am I too late?
Thanks,
Matthew
i
ORDINANCE NO.5789
AN ORDINANCE TO REPEAL CHAPTER 171 STREETS AND SIDEWALKS
AND ENACT A REPLACEMENT CHAPTER 171, STREET AND
SIDEWALKS OF THE UNIFIED DEVELOPMENT CODE
WHEREAS, it is proper and appropriate for the City Council to enact a Purpose section to
Chapter 171, Streets and Sidewalks and to better define and clarify "retaining wall"; and
WHEREAS, the Minimum Street Standards manual needed to be updated from its 1996 version
and be adopted as a technical supplement of the Street and Sidewalks Chapter; and
WHEREAS, certain technical criteria for street and sidewalk construction should be moved from
this chapter and placed with the newly adopted Minimum Street Standards manual.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF
FAYETTEVILLE, ARKANSAS;
Section 1. That the City Council of the City of Fayetteville, Arkansas hereby repeals the existing
Chapter 171, Streets and Sidewalks and enacts a replacement Chapter 171, Streets and
Sidewalks along with the replacement Minimum Street Standards manual of the Unified
Development Code as attached as Exhibit A.
PASSED and APPROVED this 4tn day of August, 2015.
ATTEST:
By: LX4164 4.&
SONDRA E. SMITH, City Cleric 'frwNltlr,.r
1 ff�F rrr
FAYETTEVILLE ;
a a a
1
Minimum Street Standards
CHAPTER 6 - PAVEMENT STRUCTURE AND MATERIALS
TABLE OF CONTENTS
Section Title P
6.1 GENERAL............................................................................................................3
6.1.1 Existing Streets.................................................................................................... 3
6.1.2 AASHTO Design................................................................................................... 3
6.1.3 Standard Pavement Section................................................................................ 3
6.1.4 Alleys.................................................................................................................... 4
6.1.5 Roundabouts........................................................................................................ 4
6.1.6 Approval............................................................................................................... 4
6.1.7 Pavement Report Revisions................................................................................ 4
A. Phases............................................................................................................. 4
B. Imported Fill Material....................................................................................... 4
C. Change in Existing Conditions......................................................................... 5
6.2 SOIL INVESTIGATION REQUIREMENTS.......................................................... 5
6.2.1 Location and Frequency of Soil Borings........................................................... 5
6.2.2 Imported Fill......................................................................................................... 5
6.2.3 Supervision by Engineer..................................................................................... 5
6.3 SUBGRADE AND FILL REQUIREMENTS.......................................................... 5
6.3.1 General.................................................................................................................. 5
6.3.2 Classification Testing.......................................................................................... 6
6.3.3 Compaction Testing............................................................................................. 6
6.3.4 California Bearing Ratio (CBR) Testing............................................................. 6
6.3.5 Subsurface Water Investigation......................................................................... 6
6.3.6 Subgrade Requirements...................................................................................... 6
6.3.7 Embankment Outside the Roadway................................................................... 7
6.4 PAVEMENT DESIGN CRITERIA......................................................................... 7
6.4.1 Flexible Pavement................................................................................................ 7
6.4.2 Rigid Pavement.................................................................................................... 8
A. General............................................................................................................ 8
B. Joint Design..................................................................................................... 8
6.4.3 Design Factors..................................................................................................... 8
A. Equivalent Single Axle Loads(ESAL).............................................................. 8
B. Design Serviceability........................................................................................ 9
C. Minimum Pavement Section............................................................................ 9
D. Portland Cement Concrete Working Stress(f)................................................ 9
E. Arterial and Collector Level Intersections......................................................... 9
* A pavement design may be required as requested by the City Engineer............ 10
6.4.4 Pavement Materials............................................................................................ 10
Chapter 6 — Pavement Structure
and Materials
a ■ I a
1
Minimum Street Standards
A. Aggregate Base Material..............................................................................
10
B. Asphalt Concrete Hot Mix..............................................................................
10
C. Concrete Requirements.................................................................................
11
6.4.5 Special Considerations.....................................................................................
11
A. Staged Construction......................................................................................
11
B. Full Depth Sections........................................................................................
12
C. Rehabilitating Existing Asphalt Streets..........................................................
12
D. Special Requirements....................................................................................
12
6.5 PAVEMENT DESIGN REPORT.........................................................................
12
6.5.1 Required Information for Pavement Design Report ........................................
12
A. List of Required Information...........................................................................
12
LIST OF TABLES
Table 6-1 Pavement Strength Coefficients.. ................................................................... 6-8
Table 6-2 Pavement Design Criteria ................... ........................................................ 6-10
Table 6-3 Asphalt Requirements................................................................................6-11
LIST OF FIGURES
This chapter does not contain figures.
Chapter 6 — Pavement Structure
and Materials
Minimum Street Standards
CHAPTER 6 — PAVEMENT STRUCTURE AND (MATERIALS
6.1 GENERAL
The purpose of this chapter is to present the Pavement Design Criteria required for use on
streets in the City of Fayetteville. These criteria shall be used in conjunction with
Chapter 4, Street Design and Technical Criteria. The Final Pavement Design Report
shall include all testing in accordance with Table 6-1.
6.1.1 Existing Streets
For existing streets the City Engineer may require an evaluation of the existing pavement
and base structure to determine if an overlay is feasible, or if reconstruction is necessary.
Any damage done to existing City streets during construction shall be repaired and/or
replaced at the contractor's expense. All repair work shall meet the requirements of this
document.
6.1.2 AASHTO Design
The design criteria and procedures presented follow American Association of State
Highway and Transportation Officials (AASHTO) Guide for the Design of Pavement
Structures.
6.1.3 Standard Pavement Section
Streets are to be constructed of asphaltic concrete pavement or Portland cement concrete
pavement, base course material, and subbase material (where required), and placed on
compacted, unyielding subgrade.
The use of treated subgrade, treated base, and/or full depth asphalt pavement may be
acceptable when designed and submitted by the designer, and approved by the City
Engineer in accordance with these standards.
On streets with grades steeper than 10%, concrete pavement may be required. The final
determination will be made by the City Engineer.
The pavement section requirements for alley construction, whether private or public,
shall be the same as for a public roadway. Alternative pavement materials proposals will
require approval from the City Engineer.
f �u
+ YI
Chapter 6 — Pavement Structure
and Materials
a r r
1
Minimum Street Standard
6.1.4 Alleys
Existing alley rights -of -way as of October 4, 2016 which have a grade less than 5% in all
directions are exempt from the requirements of this chapter and may be constructed in
accordance with § 172.11(G), (H) and (I). Alleys constructed in this manner shall use an
angular surface gravel approved by the City Engineer for its ability to maintain
compaction.
When constructed, alternative pavements shall pass a proof rolling test conducted with a
loaded dump truck. The crown shall be constructed using best practices from the Federal
Highway Administration publication Gravel Roads and Maintenance. The City Engineer
shall have the authority to require drainage measures such as underdrains and culverts
where necessary. Maintenance windrows of pavement material shall not be allowed.
The City of Fayetteville shall not be responsible for maintaining alleys constructed in this
manner.
6.1.5 Roundabouts
The pavement thickness design for the circulatory roadway shall be based on the sum of
the 20 year design volumes from all legs. A separate design analysis is required. Refer to
Section 5.3 for Roundabout design requirements.
6.1.6 Approval
The pavement design shall be submitted with final construction plans for approval.
6.1.7 Pavement Report Revisions
A revised Pavement Design investigation and report shall be required if the following
conditions occur:
A. Phases
If a street is to be built in phases, (i.e., the center two lanes are built first, then at some
later date more lanes are added), and it has been at least two years since the original
design was completed.
B. Imported Fill Material
If any new fill material that does not match the properties of the subgrade soil
proposed in the design is imported, the City may require a new pavement design
report or additional testing to verify the acceptability of this material for roadway fill.
Chapter 6 — Pavement Structure
and Materials
� R A
Minimum Street Standards
C. Change in Existing Conditions
If material that is not consistent with the approved design report is discovered during
construction, the City may require a new pavement design report or additional testing
to verify the acceptability of this material
6.2 SOIL INVESTIGATION REQUIREMENTS
6.2.1 Location and Frequency of Soil Borings
Soil borings shall be taken in the existing or proposed street right-of-way. Subgrade
samples shall be taken upon the material that will be subgrade for the proposed street
improvements. Sample sizes shall be adequate for soil classification, compaction, and
CBR testing.
A minimum of one boring shall be obtained for any roadway segment. The distance
between borings shall not exceed 500 feet. Multiple samples shall be taken alternately
among lanes and shall be evenly spaced. The City Engineer may require more frequent
testing.
Samples shall be taken to a minimum depth of 5 feet below the proposed subgrade
elevation.
6.2.2 Imported Fill
All fill material placed in the right-of-way shall be tested and approved by the City prior
to its use on the project. The material shall meet minimum requirements. Sampling shall
be at the beginning of the project, and after every 5,000 cubic yards of material is placed.
6.2.3 Supervision by Engineer
All sampling and testing of soils shall be performed under the direct supervision of a
Professional Engineer who must sign and stamp the report.
6.3 SUBGRADE AND FILL REQUIREMENTS
6.3.1 General
To simplify subgrade support testing, soil samples may be combined to form soil groups
consistent with the AASHTO classification, group index, and location for the area
investigated. Groupings shall not mix samples with different AASHTO classifications.
Chapter 6 — Pavement Structure
and Materials
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L
Minimum Street Standard
Appropriate tests, to include gradation, Atterberg limits, maximum compaction testing,
and California Bearing Ratio tests, shall be accomplished in order to determine the
suitability of soils for use as subgrade material within the roadway.
"Subgrade" shall be defined as material within 2 feet of the first paving layer (base or
asphalt). Roadway limits shall extend to 1 foot behind the back of curb, or edge of
pavement when no curb is present.
6.3.2 Classification Testing
Soils shall be classified visually and tested to determine the properties. Soils shall be
classified according to the AASHTO Classification system.
6.3.3 Compaction Testing
Maximum density of soils proposed for use as subgrade material shall be determined by
AASHTO T-99 (Standard Proctor Test), using Note 7. A new moisture/density test shall
be completed for every 5,000 cubic yards of material imported, or when field testing
results indicate a change in material. This includes instances when field testing results
yield percentages of compaction relative to maximum of 105% or greater.
6.3.4 California Bearing Ratio (CBR) Testing
CBR testing in accordance with ASTM D 1883-94 shall be completed on all soils
proposed for use as subgrade material. CBR testing shall be performed at the dry density
corresponding to 95% of the maximum dry density of the material being tested, and at
2% above optimum moisture content.
The 3-point method of CBR testing shall be performed on in -situ soils classified as A-1
or A-2, and on all soils proposed for use as borrow material for subgrade.
6.3.5 Subsurface Water Investigation
If groundwater is encountered or predicted to be encountered within 5 feet of the original
or proposed ground surface, a subsurface water investigation report shall be submitted for
approval by the City Engineer. This report is required to ensure mitigation of high
groundwater effects upon public improvements within the right-of-way. This information
may be a separate report or may be included in the geotechnical report.
6.3.6 Subgrade Requirements
The top 24 inches of subgrade must be of material meeting the following specifications
unless a formal design is approved:
Chapter 6 — Pavement Structure
and Materials
Piinimum
10
MStreet Standards
A. Material classified by the AASHTO Soil Classification System as A-1, A-2, or A-3,
having a maximum of 35 percent of the material passing the number 200 sieve, and
having a CBR equal to or greater than 8.
B. Material not meeting the above requirements for AASHTO Classification and
gradation, but having a CBR equal to or greater than 8 and a Liquid Limit and
Plasticity Index of less than or equal to 40 and 15, respectively.
C. Material not meeting the above requirements for Liquid Limit and Plasticity Index
may be used if chemically modified by the use of lime, fly ash, or cement. The type
and amount of treatment shall be determined by a material testing lab and approved
by the City. The chemically modified soil must meet all requirements of Section A
above.
D. Material not meeting the CBR requirements of Section A above, but meeting the
requirements for Liquid and Plasticity limits may be used provided a formal
pavement design based on the actual CBR value of the soil is provided. For this case,
CBR values shall be a minimum of 4. Use of lower CBR values may be allowed
where specialized pavement designs using geogrids or other technologies are
proposed.
6.3.7 Embankment Outside the Roadway
Material for curb backfill, under sidewalks, on backslopes, or in other areas within the
right-of-way may be any material that is free from sod, stumps, roots, or other perishable
or deleterious material that it be capable of forming a stable embankment when
compacted. Areas outside the roadway shall be compacted to minimum of 90% Standard
Proctor density unless otherwise specified.
6.4 PAVEMENT DESIGN CRITERIA
6.4.1 Flexible Pavement
Flexible pavements are those pavements that have sufficiently low bending resistance to
maintain continuous contact with the underlying structure, yet have sufficient stability to
support a given traffic loading condition. Commonly known as asphaltic concrete
pavement.
I� R
Chapter 6 — Pavement Structure
and Materials
1
Minimum Street Standar
Refer to Table 6-1 below for structural number coefficients for the pavement design.
Table 6-1 Pavement Strength Coefficients
Pavement Structure Component '` Design Strength
Coefficients
Conventional Materials Per Inch of Material
Limiting Test
Criteria
ACHM Surface Course
0.44
*2" Min. Course
ACHM Binder Course
0.44
*3" Min. Course
ACHM Base Course
0.36
R 90+
*4.5" Min. Course
Aggregate Base Course (Class 7)
0.14
R>72
6" Min. Course
Chemically Treated Subgrades (or
Approved Substitute)
Cement Treated Subgrade
Compressive
Strength of Field
Specimen
0.23
7 da , 650-1000 psi
Fly Ash Treated Subgrade
0.10
7 day, 150 psi @ 70°±
Lime Treated Subgrade
0.14
7 day, 160 psi, PI <6
Kiln Dust Treated Subgrade
0.10
7 day, 150 psi, PI <6
* Maximum lift is only limited by compaction requirements.
6.4.2 Rigid Pavement
A. General
Rigid pavements are those that possess a high bending resistance and distribute loads
over a large area of foundation soil. Commonly known as Portland Cement Concrete
Pavement.
B. Joint Design
The construction plans for rigid pavement areas shall include a joint pattern layout for
each street, alley and intersection. All joints and joint filling in rigid pavement shall
be designed and detailed in accordance with the current AASHTO standards.
6.4.3 Design Factors
A. Equivalent Single Axle Loads (ESAL)
Equivalent Single Axle Loads (ESAL) units are based on 18 kip (80 kN) axle loading
on each design lane. All data and design procedures in this section use ESAL units for
pavement loading repetitions. Maximum ESAL criteria for local residential and
collector streets are given in Table 6-2. Where existing or projected traffic is such
that maximum ESAL's are exceeded, a formal design will be required, at the
discretion of the City Engineer. ESAL calculations are required for arterial streets.
Chapter 6 — Pavement Structure
and Materials
eVIlie
.....,..
Directional distribution of ESAL's may be 50% unless the Traffic Study indicates
otherwise. Lane distribution factors shall be 80% for two lanes of travel in each
direction.
In the absence of truck traffic distribution data, 5% trucks shall be used, distributed
across truck types in accordance with Federal Highway Administration guidance for
urban arterial streets. The City Engineer may require a higher percentage of trucks to
be included in the calculations when existing or projected truck traffic is expected to
exceed 5%.
B. Design Serviceability
The Serviceability Index to be used for all City Roadways dedicated for public use is
given in Table 6-2.
C. Minimum Pavement Section
Table 6-2 provides the minimum acceptable pavement sections and Structural
Numbers for each roadway classification based on a minimum CBR of the subgrade
material of 8, and on the maximum number of ESAL's as specified. For lower CBR
values and higher ESAL's, pavement design calculations shall be provided. In
specifying layer thickness, the designer shall consider how the pavement section will
be physically constructed, including minimum asphalt layer thicknesses.
t
D. Portland Cement Concrete Working Stress (f )
t
The working stress (f ) to be used in the design shall be 75 percent of that provided by
third -point beam loading, which shall have a minimum laboratory 28-day strength of
600 psi based on actual tests of materials to be used.
E. Arterial and Collector Level Intersections
The pavement thickness design for arterial and collector level intersections shall be
the combined 20-year design for both directions for the shared use areas. A separate
design analysis is required.
Chapter 6 - Pavement Structure
and Materials
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Minimum Street Standards
Table 6-2 Pavement Design Criteria
ROAD
20-Year
Serviceability Index
Reli
Minimum
Default
Default
Minimum
CLASSIFICATION
Design
(PSI)
a-
Asphalt for
Aggregate
Full Depth
Concrete
Min.
Traffic
bilit
Composite
Base
Asphalt
for Rigid
Struct.
Information
y
Section
Course
Pavement
Section
Section
Thickness
No.
inches
p°
pt
a PSI
Layer,
Layer,
Layer,
Layer,
MAXIMUM
inches
I inches
inches _
inches _
Init.
Final
Diff.
%
HMA
ABC
Min.
Min.
ESAL'S
LOCAL 1 50,000
4.5
2.0
2.5
80
3.0
8.0
5.5
6.0
2.42
COLLECTOR *
500,000
4.5
2.0
2.5
85
5.0
6
7
Design
3.04
ARTERIAL
Two lane
Design
4.5
2.5
2.0
95
Design
Design
Design
Design
Design
Four lane
Design
4.5
2.5
2.0
95
Design
Design
Design
Design
Design
* A pavement design may be required as requested by the City Engineer.
6.4.4 Pavement Materials
A. Aggregate Base Material
Materials for aggregate base courses shall meet the requirements of Section 303.02 of
the AHTD Standard Specifications Edition of 2014.
B. Asphalt Concrete Hot Mix
Materials for Asphalt Concrete Hot Mix base, binder, and surface courses shall meet
the requirements of the 2014 AHTD Standard Specifications referenced in the
following. NO MARSHALL MIXES ARE ALLOWED UNLESS SPECIFICALLY
AUTHORIZED IN WRITING BY THE CITY ENGINEER.
Asphalt mix designs shall meet the requirements of Section 404.01(b), and Tables
405-1, 406-1, 407-1, and 407-2 of Sections 405, 406, and 407, with additional
requirements as follows:
Chapter 6 — Pavement Structure
and Materials
i a i
Minimum Street Standards
Table 6-3 Asphalt Requirements
20-Year
Number of Gyrations
Asphalt
Surface
Design
(N)
Grade
Course
Traffic
Aggregate
Information
Size
Allowed
ESAUS
Nimm
Nowign
NM.
Nmes
<300k
6
50
115
64-22
I 9.5
300k-3 Million
7
75
160
70-22
9.5/12.5
>3 Million
8
100
205
76-22
12.5
3/8" (9.5) mm surface course shall be used on all residential and local streets. '/2"
(12.5 mm) surface course shall be used on arterial streets. Collector streets may use
either type of surface mix.
Lift thicknesses shall be a minimum of 3 times the maximum nominal aggregate size.
Maximum lift thicknesses will be limited by capability of compaction equipment to
achieve minimum compaction requirements, but will not be allowed to exceed 6
times the maximum nominal aggregate size.
C. Concrete Requirements
Materials for Portland Cement Concrete Pavement shall meet the requirements of the
latest edition of the AHTD Standard Specifications. Concrete for paving shall be
Class B concrete with a minimum 28-day compressive strength of 4,000 psi and shall
have air entrainment of 4 to 7 percent.
6.4.5 Special Considerations
A. Staged Construction
This is an alternative for the Developer to provide a minimum thickness pavement
during construction, and after repairs, construct the final lift of asphalt, providing for
a new finished pavement surface.
(HMA) may be submitted for approval with a minimum wearing course thickness of
2.0 inches. If the full pavement section is not to be placed immediately, a pavement
design for staged construction may be required by the City Engineer. The staged
construction design must include asphalt thickness for each proposed stage.
Calculations, traffic numbers, and construction truck traffic numbers supporting the
staged design must also be submitted. For staged construction, accommodations must
be provided for the paved surface to drain with no water left standing on the
pavement.
Chapter 6 — Pavement Structure
and Materials
Fa%v-�ee'�le,A.
B. Full Depth Sections
Full depth asphalt pavement sections will be considered on a case by case basis where
depth of bedrock, drainage, and soil conditions are compatible with full -depth asphalt.
When permitted by the City Engineer, full depth asphalt pavements shall consist of
one or more layers of black base or binder course topped with one or more layers of
surface course.
C. Rehabilitating Existing Asphalt Streets
Prior to overlaying existing asphalt, the City Engineer may accept nondestructive
testing to determine the amount of overlay necessary to bring the street to current
standards. All "pot -holes," utility trench settlement, cracking, and any similar
imperfections shall be repaired to the City Engineer's satisfaction prior to overlaying.
D. Special Requirements
The City Engineer may require full depth asphalt, Portland cement concrete or
chemically treated base or subgrade in locations where traffic, utilities, type of
construction, subsurface drainage, or time of construction would make asphalt on
aggregate base impractical.
6.5 PAVEMENT DESIGN REPORT
The pavement design report shall be prepared by or under the supervision of and signed
and stamped by a Professional Engineer registered in the State of Arkansas. The report
shall make a recommendation for a typical pavement structural section based on known
site soil conditions and a valid traffic impact study, when required. The report shall be
submitted in pdf format.
6.5.1 Required Information for Pavement Design Report
A. List of Required Information
1. Project Name.
2. Owner Name and Contact Information.
3. Vicinity map to locate the investigated area.
4. Scaled drawings showing the location of final borings.
5. Plat with street names.
6. Scaled drawings showing the estimated extent of subgrade soil types and ESAL for
each street classification.
7. Pavement design alternatives for each street classification.
Chapter 6 — Pavement Structure
and Materials
8. Tabular listing of sample designation, sample depth, Group Number, liquid limit,
plasticity index, percent passing the No. 200 sieve, AASHTO Classification,
Group Index and soil description.
9. Swell/consolidation tests.
10. Borrow source identification.
11. Design calculations for all phases of soil report.
12. Design coefficient used for asphalt, base course, etc. Refer to Table 6-1.
13. Mix design test results as discussed in Chapter 11, Street Inspection and
Testing Procedures, where chemical stabilization has been approved.
14. A discussion of potential subgrade soil problems including, but not limited to:
a. Heave or settlement prone soils.
b. Frost susceptible soils.
c. Ground water.
d. Drainage considerations (surface and subsurface).
e. Cold weather construction (if appropriate).
f. Soluble sulfates in subgrade.
g. Other factors or properties that could affect the design or performance of the
pavement system.
15. Recommendations to alleviate or mitigate the impact of problems discussed in
Item 14 above.
16. Professional Engineer Stamp
Chapter 6 — Pavement Structure
and Materials
NORTHWESTARKANsAs
Demo ra
'.01. 113a,.r R,0 ' 7 .V1 C . AQ<, ,.3;J_' ° /79-A.. 9- . _:,
AFFIDAVIT OF PUBLICATION
I Karen Caler, do solemnly swear that I am the Legal Clerk of the
Northwest Arkansas Democrat -Gazette, printed and published in
Washington County and Benton County, Arkansas, and of bona fide
circulation, that from my own personal knowledge and reference
to the files of said publication, the advertisement of:
CITY OF FAYETTEVILLE
Ord. 5914
Was inserted in the Regular Edition on:
October 13, 2016
Publication Charges $ 133.90
�!� ac
Karen Caler
Subscribed and sworn to before me
This ZS-day of DOIL-, 2016.
Notary Public
My Commission Expires: �2
CATHY WILES
Arkansas •. Canton County
Notary Public - 118
Corinir'�123b-
n%ly COMITIiSSiOn i:xpires Fah 20, 202 4
**NOTE**
Please do not pay from Affidavit.
Invoice will be sent. RECF J\j E'0
0c, %. 2016
��, F�ycT1'EVIL �E
cl.r 5
Ordinance:5914
File Number: 2016-0440
AMEND CHAPTER 6 PAVEMENT
STRUCTURE AND MATERIALS:
AN ORDINANCE TO AMEND
CHAPTER 6 PAVEMENT
STRUCTURE AND MATERIALS OF
THE MINIMUM STREET
STANDARDS MANUAL TO ALLOW
ALLEYS TO BE CONSTRUCTED
WITH GRAVEL PAVEMENT
SECTIONS IN CERTAIN
CIRCUMSTANCES.
WHEREAS, Ordinance No. 5789, which
was passed by the Fayetteville City
Council on August 4, 2015, adopted the
Minimum Street Standards manual as part
of the Unified Development Code and
requires City Council approval for
amendments to those standards; and
WHEREAS, § 6.1.3 Standard Pavement
Sections of the Minimum Street
Standards manual currently requires that
the pavement section requirements for
alley construction be the same as for a
public roadway unless alternative
materials are approved by the City
Engineer.
NOW, THEREFORE, BE IT
ORDAINED BY THE CITY COUNCIL
OF THE CITY OF FAYETTEVILLE,
ARKANSAS:
Section 1: That the City Council of the
City of Fayetteville, Arkansas hereby
amends § 6.1.4 Alleys of the Minimum
Street Standards Manual by appending
the language below and renumbers the
following sections accordingly:
"Existing alley rights -of -way which have
a grade less than 5% in all directions are
exempt from the requirements of this
chapter and may be constructed in
accordance with §172.11(G), (H), and (1).
Alleys constructed in this manner shall
use an angular surface gravel approved by
the City Engineer for its ability to
maintain compaction.
When constructed, alternative pavements
shall pass a proof rolling test conducted
with a loaded dump truck. The crown
shall be constructed using best practices
from the Federal Highway Administration
publication Gravel Roads and
Maintenance. The City Engineer shall
have the authority to require drainage
measures such as underdrains and
culverts where necessary. Maintenance
windrows of pavement materials shall not
be allowed.
The City of Fayetteville shall not be
responsible for maintaining alleys
constructed in this manner."
PASSED and APPROVED on 10/4/2016
Approved:
Lioneld Jordan, Mayor
Attest:
Sondra E. Smith, City Clerk Treasurer
73888188 Oct. 13, 2016