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Home My WebLink AboutORDINANCE 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 r r r 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 a a a 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