Difference between revisions of "Recent Policy Changes in the EPG"
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| − | < | + | <div style="margin: 15px; border:1px solid black; width:97%; background-color:white; padding:5px; border-radius:5px; box-shadow:10px 10px 5px #888888">October 11, 2024 |
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| + | * Removed restriction for use of transparent bridge deck forms on horizontally curved structures in [[751.10_General_Superstructure#751.10.2.4_Transparent_Forms | EPG 751.10.2.4 Transparent Forms]]. | ||
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| + | <div style="margin: 15px; border:1px solid black; width:97%; background-color:white; padding:5px; border-radius:5px; box-shadow:10px 10px 5px #888888">October 10, 2024 | ||
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| + | * Revised Tack Coat application rate for estimating quantities for bridges in [[751.6_General_Quantities#751.6.2.16_Tack_Coat | EPG 751.6.2.16 Tack Coat]]. | ||
| + | * Updated guidance with the State Funded ROW A-date process and clarified some other steps regarding the limited a-date process in [[236.3_Administration#236.3.4_Right_of_Way_Acquisition_Authority_and_Project_Funding | EPG 236.3.4 Right of Way Acquisition Authority and Project Funding]]. | ||
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| + | <div style="margin: 15px; border:1px solid black; width:97%; background-color:white; padding:5px; border-radius:5px; box-shadow:10px 10px 5px #888888">October 9, 2024 | ||
| + | ---- | ||
| + | * Update guidance on addressing apprenticeship guidance on prevailing wage rates in [[:Category:110_State_and_Federal_Wage_Rates_and_Other_Requirements#110.3_Prevailing_Wages_and_Records_.28Guidance_for_Sec_110.3.29 | EPG110.3 Prevailing Wages and Records (Guidance for Sec 110.3)]]. | ||
| + | </div> | ||
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| + | <div style="margin: 15px; border:1px solid black; width:97%; background-color:white; padding:5px; border-radius:5px; box-shadow:10px 10px 5px #888888">September 16, 2024 | ||
| + | ---- | ||
| + | * Revised monetary limits due to the new 49 CFR part 24 final rule for relocation benefits and minor grammar updates were also made in [[236.8_Relocation_Assistance_Program|EPG 236.8 Relocation Assistance Program]]. | ||
| + | </div> | ||
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<div style="margin: 15px; border:1px solid black; width:97%; background-color:white; padding:5px; border-radius:5px; box-shadow:10px 10px 5px #888888">July 22, 2024 | <div style="margin: 15px; border:1px solid black; width:97%; background-color:white; padding:5px; border-radius:5px; box-shadow:10px 10px 5px #888888">July 22, 2024 | ||
---- | ---- | ||
| + | * Updated EPG [[:Category:408_Prime_Coat#408.1.5_Method_of_Measurement_.28Sec_408.5.29|408.1.5 Method of Measurement (Sec 408.5)]] to provide guidance and specifications for volume correction of liquid asphalt. | ||
| + | * Updated Longitudinal Buffer Spaces (Table 616.3.6) in EPG [[616.3_Temporary_Traffic_Control_Elements_(MUTCD_Chapter_6C)#616.3.6.4_Side_Road_Tapers|616.3.6.4 Side Road Tapers]]. | ||
| + | * Updates to EPG [[:Category:618_Mobilization|618 Mobilization]], this eliminates a separate payment for contract bond and RR insurance. No change to the retention of mobilization in excess of 10% of the contract (released at acceptance for maintenance). | ||
* Updates to reflect LRFD seismic bridge and retaining wall design policy implementation in EPG [[321.2_Geotechnical_Guidelines#321.2.4.4_Light_Towers|321.2.4.4]], [[:Category:720_Mechanically_Stabilized_Earth_Wall_Systems#720.1_Materials_Guidance_for_Sec_720|720.1]], [[:Category:747_Bridge_Reports_and_Layouts#747.2.6.2_Mechanically_Stabilized_Earth_.28MSE.29_Wall_Systems|747.2.6.2]], [[:Category:751_LRFD_Bridge_Design_Guidelines|multiple articles in 751]], [[:Category:756_Seismic_Design|756]] and [[:Category:1052_Mechanically_Stabilized_Earth_Wall_(MSE)_and_Sound_Wall_System_Components|multiple articles in 1052]]. | * Updates to reflect LRFD seismic bridge and retaining wall design policy implementation in EPG [[321.2_Geotechnical_Guidelines#321.2.4.4_Light_Towers|321.2.4.4]], [[:Category:720_Mechanically_Stabilized_Earth_Wall_Systems#720.1_Materials_Guidance_for_Sec_720|720.1]], [[:Category:747_Bridge_Reports_and_Layouts#747.2.6.2_Mechanically_Stabilized_Earth_.28MSE.29_Wall_Systems|747.2.6.2]], [[:Category:751_LRFD_Bridge_Design_Guidelines|multiple articles in 751]], [[:Category:756_Seismic_Design|756]] and [[:Category:1052_Mechanically_Stabilized_Earth_Wall_(MSE)_and_Sound_Wall_System_Components|multiple articles in 1052]]. | ||
| − | * Include EPG guidance for use of stay-in-place transparent forms for bridge decks in EPG [[751.6_General_Quantities#751.6.1_Index_of_Quantities|751.6.1 Index of Quantities]], [[751.10_General_Superstructure#751.10.1.7_Standard_Bridge_Deck_Details|751.10.1.7 Standard Bridge Deck Details]], [[751.10_General_Superstructure#751.10.2.4_Transparent_Forms|751.10.2.4 Transparent Forms]] and [[751.50_Standard_Detailing_Notes#B3c._Slabs_on_Steel.2C_Concrete_and_Semi-Deep_Abutment.2C_and_Reinforced_Concrete_Wearing_Surfaces.|751.50 Standard Detailing Notes]] | + | * Include EPG guidance for use of stay-in-place transparent forms for bridge decks in EPG [[751.6_General_Quantities#751.6.1_Index_of_Quantities|751.6.1 Index of Quantities]], [[751.10_General_Superstructure#751.10.1.7_Standard_Bridge_Deck_Details|751.10.1.7 Standard Bridge Deck Details]], [[751.10_General_Superstructure#751.10.2.4_Transparent_Forms|751.10.2.4 Transparent Forms]] and [[751.50_Standard_Detailing_Notes#B3c._Slabs_on_Steel.2C_Concrete_and_Semi-Deep_Abutment.2C_and_Reinforced_Concrete_Wearing_Surfaces.|751.50 Standard Detailing Notes]]. |
| + | * Chain link fence revised for LRFD specifications and added 120-inch straight and 96-inch curved chain link fence options. Fence posts are attached to top of curb. Chain link fence with Type D and H barrier options also added to allow the barrier to be slip-formed with chain link fence posts attached to back face of barrier, see EPG [[751.5_Structural_Detailing_Guidelines#751.5.8.5_Pedestrian_Railing|751.5.8.5 Pedestrian Railing]], [[751.6_General_Quantities|751.6 General Quantities]], [[751.12_Barriers,_Railings,_Curbs_and_Fences#751.12.4_Chain_Link_Fence|751.12.4 Chain Link Fence]] and [[751.50_Standard_Detailing_Notes#H11._Fences_and_Sidewalks|751.50-H11 Standard Detailing Notes]]. | ||
</div> | </div> | ||
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<div style="margin: 15px; border:1px solid black; width:97%; background-color:white; padding:5px; border-radius:5px; box-shadow:10px 10px 5px #888888">July 18, 2024 | <div style="margin: 15px; border:1px solid black; width:97%; background-color:white; padding:5px; border-radius:5px; box-shadow:10px 10px 5px #888888">July 18, 2024 | ||
Latest revision as of 13:43, 30 October 2024
October 11, 2024
- Removed restriction for use of transparent bridge deck forms on horizontally curved structures in EPG 751.10.2.4 Transparent Forms.
October 10, 2024
- Revised Tack Coat application rate for estimating quantities for bridges in EPG 751.6.2.16 Tack Coat.
- Updated guidance with the State Funded ROW A-date process and clarified some other steps regarding the limited a-date process in EPG 236.3.4 Right of Way Acquisition Authority and Project Funding.
October 9, 2024
- Update guidance on addressing apprenticeship guidance on prevailing wage rates in EPG110.3 Prevailing Wages and Records (Guidance for Sec 110.3).
September 16, 2024
- Revised monetary limits due to the new 49 CFR part 24 final rule for relocation benefits and minor grammar updates were also made in EPG 236.8 Relocation Assistance Program.
July 22, 2024
- Updated EPG 408.1.5 Method of Measurement (Sec 408.5) to provide guidance and specifications for volume correction of liquid asphalt.
- Updated Longitudinal Buffer Spaces (Table 616.3.6) in EPG 616.3.6.4 Side Road Tapers.
- Updates to EPG 618 Mobilization, this eliminates a separate payment for contract bond and RR insurance. No change to the retention of mobilization in excess of 10% of the contract (released at acceptance for maintenance).
- Updates to reflect LRFD seismic bridge and retaining wall design policy implementation in EPG 321.2.4.4, 720.1, 747.2.6.2, multiple articles in 751, 756 and multiple articles in 1052.
- Include EPG guidance for use of stay-in-place transparent forms for bridge decks in EPG 751.6.1 Index of Quantities, 751.10.1.7 Standard Bridge Deck Details, 751.10.2.4 Transparent Forms and 751.50 Standard Detailing Notes.
- Chain link fence revised for LRFD specifications and added 120-inch straight and 96-inch curved chain link fence options. Fence posts are attached to top of curb. Chain link fence with Type D and H barrier options also added to allow the barrier to be slip-formed with chain link fence posts attached to back face of barrier, see EPG 751.5.8.5 Pedestrian Railing, 751.6 General Quantities, 751.12.4 Chain Link Fence and 751.50-H11 Standard Detailing Notes.
July 18, 2024
- EPG 751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts was updated to correct the crash test classification for the 12” x 29” vertical bridge barrier.
July 11, 2024
- Current armor detail is no longer in production. An optional armor detail is provided in bridge standard drawings. Added a standard note for those drawings to EPG 751.50.
July 3, 2024
- Updated Safer Document in EPG 907.9.
- Updated the language in EPG 128.2 Preventive Maintenance Projects (1R and 2R) to be consistent with the messaging for the SAFER program.
July 2, 2024
- EPG 941.9.8.4 Culvert Pipe updates the terminology of the plastic pipes and updates the guidance on use with driveways.
June 27, 2024
- Update EPG 147.3 Job Order Contracting (JOC) to provide clarity for submitting non-standard JOCs.
June 21, 2024
- Updated processes and procedures related to Environmental/Historic Preservation work on LPA projects in EPG 136.6 Environmental and Cultural Requirements.
June 5, 2024
- Added a standard note to ensure that touch-up products for galvanized reinforcing steel do not contain aluminum in EPG 751.50 Standard Detailing Notes.
May 28, 2024
- EPG 105.15.2 Final Acceptance was updated to clarify the DBE Final Payment Form now serves as the required DBE Participation List and Final Verification.
May 23, 2024
- Updated EPG 751.37.1.1 Dimensions and Nomenclature, 751.37.1.6 Drilled Shaft General Detail Considerations and 751.50 Standard Detailing Notes - G8. Drilled Shaft to clarify column and drilled shaft connection details so contractors do not insert column reinforcements or dowel bars into drilled shaft’s wet concrete.
May 16, 2024
- Updated EPG 106.3.2.59 TM-59, Determination of the International Roughness Index - Profiler certification requirements have changed. Smoothness dispute resolutions no longer settled by the MoDOT SurPro and will require a Third Party.
- MoDOT's guidance for use of guard cable has been updated to clarify low-tension references are for repairs only and all new installations will be high-tension guard cable. These revisions also include guidance for splicing both high-tension and low-tension guard cable in EPG 231.1.2 Barrier Types, 606.2 Guard Cable, 617 traffic barrier and 1040 Guardrail, End Terminals, One-Strand Access Restraint Cable and Guard Cable Material.
- Updated EPG 612 Impact Attenuators, 612.4 Construction Inspection Guidelines and 616.23.2.5.11 Protective Vehicles - This clarifies usage of Impact Attenuators within Work Zones. These clarifications align with recent revisions to TAs and TMA usage.
- Revised content in EPG 616.19 - Quality Standards for Temporary Traffic Control Devices to language consistent with current policy and rearranged to flow with the order of first appearance in a work zone. Some revisions included eliminating outdated or unnecessary content, including pictures, for the specific article.
- Updates to EPG 751.1.3.4 Barrier or Railing Type, Height and Guidelines for Curb Blockouts, 751.8.3.5 Miscellaneous, 751.12.2 Two Tube Rail (Top Mounted), 751.12.6 Culvert Guardrail (Top Mounted) and 751.50 Standard Detailing Notes provide a MASH option for attaching guardrail to box culverts. These revisions also include guidance for Two Tube Bridge Railings.
May 13, 2024
- Updated the Missouri Uniform Crash Report Preparation Manual in EPG 907.4.
May 10, 2024
- EPG 902.15.3.1 has been revised to allow core team to specify signal detection type to be documented with memo in eProjects instead of a design exception.
March 27, 2024
- EPG 751.1 Preliminary Design and EPG 751.36 Driven Piles were revised to clarify guidance for field verification of pile driving which affects design and construction.
- EPG 751.5.9.2.1.2 Bend Shapes: New article under the general information for reinforcing steel explaining MoDOT’s bent bar shapes used in structures.
- EPG 751.5.9.2.7 Length Calculations: Clarified calculations for hook dimensions and bend deductions.
- EPG 751.11.3.5, 751.12.1.3-6,751.22.3.4.1 and 751.31,32 & 35: Revised references to stirrup pin bend shapes. Revised bar shape dimensions or shape numbers in accordance with revisions to the bill of reinforcing standard drawing.
March 14, 2024
- Changes made to 902.5.23 Signal Indications for Left-Turn Movements – General (MUTCD Section 4D.17) due to new guidelines for Protected Only Left Turns.
January 23, 2024
- Change made to EPG 230.1.5 Spiral Transition Curves due to a change in the 2018 AASHTO Green Book for superelevation runoff lengths for 50+ mph.
- 616.8.1 Temporary Traffic Control for Contract Plan Sheet Development clarifies stationary TMAs will become a new lump sum bid item with applicable new TMA JSP. Mobile operation TMAs will be incidental to the bid items that utilize such methods to get a task done.
- Clarified guidance for conduit clamp anchors versus anchor bolts in EPG 751.12.1.2.7 Details of Mounting Light Poles on Safety Barrier Curbs and EPG 751.50 - H4. Conduit System.
- Provided a MASH TL-4 steel barrier alternate for bridges. Creating MO Std Plans 606.61 and Bridge Standard Drawings TTR04 & 05. Adding standard notes to EPG 751.50 - H9. Thrie Beam and Other Rail Types (Notes for Bridge Standard Drawings).
- Updated EPG 1048.2.1.1 Qualified List due to NTPEP has changed their name to AASHTO Product Evaluation and Audit Solutions.
October 18, 2023
- Updates were made to 236.12 Quality Assurance Reviews to provide a more accurate description of the current processes and procedures of our QARs.
September 22, 2023
- Changes made to EPG guidelines for flags in 616.6.2.2 Flags and Advance Warning Rail System on Signs and 616.5.3.4 Single Flagger to meet the Manual on Uniform Traffic Control Devices (MUTCD). 612.1.4 MoDOT Equipment/Materials Stored in Bed of Protective Vehicle Guidelines was updated to describe how to safely carry loads/cargo in back of the PV as long as it is secure.
September 19, 2023
- Added new EPG article 907.10 Complete Streets.
September 15, 2023
- 616.8 Typical Applications (MUTCD 6H) was updated.
August 22, 2023
- Added info and related notes & pay items to EPG for Decorative Pedestrian Fence. Creating Bridge Standard Drawings. Incorporating a Bridge Pre-qualified Listing (BPPL) for decorative fencing in EPG 751.6.1 Index of Quantities, 751.12.5 Decorative Pedestrian Fence, and 751.50 Standard Detailing Notes.
August 14, 2023
- Updated guidance that indicates when temporary stop signs should be placed at signalized intersections where the electric is out in EPG 902.5.43.1 Temporary Stop Signs at Signalized Intersections.
- Updated wind loads in EPG 751.2.23 Wind Loads to current LRFD Bridge design Specifications.
August 11, 2023
- Updated EPG 753.15 (Section 15) - Bridge Inspection Rating Manual to make the load rating process clearer to users. For efficiency purposes, excel Load Rating Summary Sheets have also been added to the EPG.
July 21, 2023
- Updated and created new graphs for EPG 751.22.1.3 Typical Span Ranges and 751.21.4 Span and Structure Lengths to better reflect current design practices,
July 19, 2023
- Revised 616.6 Temporary Traffic Control Zone Devices (MUTCD 6F) to add Type IV Fluorescent Orange, replacing Type IV Orange and Type IX/XI Fluorescent Orange for trim-line and drum-like channelizers. Type IV Fluorescent Orange will provide better visibility and luminance at driver's normal observation angle. Type IX/XI are designed for higher observation angle performance and incur higher costs to the TTCD.
- Revised 1041.7 Polypropylene Culvert Pipe Properties for current AASHTO references concerning polypropylene storm sewer pipe and NTPEP requirement to be placed on the qualified list. 750.7.2 was also updated to clean up some wording to accurately describe which pipe type is allowable for each group of pipe.
- Added guidance on the change from the contractor self perform requirement from 40% to 30% in 108.1.1 Review and Approval of a Subcontract Request.
- 1017 Slag Cement was revised to better define slag. Slag cement is the industry terminalolgy and intended material.
- Modify referenced ASTM materal standards for HDPE in 1060 Electrical Conduit to accurately reflect use as electrical conduit.
- 1007 Aggregate for Base processes for the Districts and CM Lab are being updated to establish how comparable and non-comparable tests and material will be handled.
- Added AASHTO Reference for filter sock to 806.2 Sediment Control Measures and 806.8.6.4 Sediment Control Measures.
- Fleet Lighting and 612.1.2 MoDOT Protective Vehicle/TMA Marking and Lighting were updated to align with the new typical applications.
- Shop drawing review and fabrication inspection responsibilities have been updated in 106.16.2 Shop Drawings and 1080.2 Fabrication Inspection Shipment Release (FISR)
- Updated 950.1.4 Violation Study and 950.1.6 Conditions for Intersections with Automated Red-Light Violation Enforcement Equipment Installed After January 2011. Clarifcation was added for who at MoDOT will review the data.
- 751.10.1.12 Slab Pouring Sequences and Construction Joints and H6. Pouring and Finishing Concrete Slabs have been updated to clarify for simple spans and for redecks (both don’t require pouring sequences) that decks shall be poured up grade.
- 242.6 Specifying One Pavement Type was updated to change documentation requirements from Design Exception, to file a memo in eProjects. The State Design Engineer and State Construction and Materials Engineer will still need to be informed when one pavement type is specified on a MoDOT contract.
- Added acceeleration/decereation lane guidance lookup table to 233.2.6 Type 4: Directional Median Opening with Downstream U-Turns
June 27, 2023
- Updated TRB’s NCHRP Report 1043, Guide for Roundabouts in 233.3 Roundabouts
- Updated 753 Bridge Inspection Rating - A new section was added to the Bridge Inspection Rating Manual - Tunnel Inspection Requirements in Missouri
- Updated 941.10 Automated License Plate Readers and Pan-Tilt-Zoom Cameras to reflect new approval process with the Department of Public Safety and clearification on existing guidance.
- Updates to 941.2 Entrance Requests Within Controlled Access Right of Way have been made to improve coordination between district traffic and right of way staff.
May 24, 2023
- Added two new Material Inspection Test Methods to 106.3.2: 106.3.2.91 TM-91, Determination of Total Sulfur in Fly Ash by Sodium Carbonate fusion and 106.3.2.92 TM-92, Determination of Sulfide sulfur by oxidation of blended slag cements.
May 1, 2023
- Updated Signpost Selection Guide to show "BREAKAWAY REQUIRED" note for applicable entries in the PSST tab.
- Revised EPG 751.21.3.4 to always use regular-size and fully stressed prestressing strands for the top two prestressing strands for the purpose of supporting the reinforcement cage. The 3/8” support strands are not sufficiently supporting the reinforcement cage.
April 26, 2023
- Due to a new code of federal regulations relating to bridge weight classifications, 903.5.36 has been updated to reflect the changes in signs which will be associated with the new classifications.
April 20, 2023
- A revision to Sec 401.7.6 will clarify that the density requirement applies to only unconfined longitudinal joints. EPG 401.2.6 pertaining to this spec has been modified.
- Updated EPG 751.10.4 and 751.50 to clarify allowed conduit size and junction box size in concrete barrier Type D, Type H, bridge abutment wing and slab.
- Added the reasoning behind the 90 day camber for typical bridge projects in EPG 751.22 and consideration of line sag is necessary to retrieve accurate camber measurements in EPG 1029.2.13.
- Updated EPG 750.6.3.3 clarifying that geotextile is required with Rock Blanket, and now requiring in all installations of Rock Ditch Liner.
- Updated EPG 450 to reflect a change in policy to increase minimum lift thicknesses for Superpave and Bituminous Pavement mixes, as per "four times the nominal maximum aggregate size" as recommended by NCHRP study. Additionally, language was added to explain MSCR Graded binders.
- Update to current sheeting types in EPG 616.6.
April 18, 2023
- References to LRFD specifications for development lengths and splice lengths have been updated to those of the current version of the AASHTO LRFD Bridge Design Specifications.
- Articles 751.5 and 751.37.6.1 have been updated to reflect these changes.
April 12, 2023
- Added verification of signature link and updating language addressing types of appraisals required during condemnations in EPG 136.8.5.2, EPG 236.7.1.13, and 236.10.7.5.
March 8, 2023
- Updated the terminology of divisional (formerly median) islands constructed with non-mountable curbs in EPG Articles 233.2.12 Islands, 643.4.1.14 Railroad Crossing Median Islands and 901.1.2 Basic Lighting and Intersections Including Ramp Terminals at Crossroads.
March 7, 2023
- Archived 405 Processing Reclaimed Asphalt. The information in this Article is outdated and has been removed.
February 9, 2023
- Updated EPG 401.2.3 and EPG 403.1.4 so that District Materials may approve mix transfers if the mix quantity per project is 250 tons or less provided the mix type and contract binder grade match what’s listed on the plan sheets or change order.
February 1, 2023
- 616.6.87 Temporary Rumble_Strips (MUTCD_6F.87) has been updated to discontinue short-term temporary rumble strips and continue the use of long-term temporary rumble strips.
- Added FS37_Carbon_Reduction_Program_(CRP)_Funds to EPG 153.11 Financial Services
January 27, 2023
- Updated EPG 139 Design-Build
This revision updates the Design-Build guidance and processes for invoice reviews, risk to identify auditing, and other minor revisions.
Revisions to EPG 134 better emphasize how conflicts of interest are identified, better defines the solicitation and selection process, rating/scoring of consultants, and brings the entire process up to current practices.
January 19, 2023
- Updated EPG 136.4
January 18, 2023
- Revising various specs and EPG articles (EPG 751.1.2.9, 751.6, 751.14.5.8, 751.50, 1045) for updates to preferred paint systems. Adding organic zinc coatings and removing calcium sulfonate.
January 10, 2023
- Update EPG 903.6.11 Chevron Alignment Sign (W1-8)
January 1, 2023
- Updated 616.8_Typical_Applications_(MUTCD_6H)
- Added new Typical Applications Effective January 1, 2023
December 12, 2022
- Renamed and updated 127.28 Linking Planning and the National Environmental Policy Act (NEPA) to 127.28 Planning and Environmental Linkages (PEL) and the National Environmental Policy Act (NEPA). The intent and definition of a PEL has changed since the EPG article was written. This update makes it current to practice.
December 6, 2022
- 910.5.1 - Added 2 CFR 200.216 reference on prohibited vendors
November 28, 2022
- Added new EPG Article 153.4 Administrative in EPG 153 Agreements and Contracts
November 15, 2022
- EPG 131.2 - Removed FHWA and CFR references due to the Changes in 2019 no longer requiring it.
November 10, 2022
November 01, 2022
- Modified EPG 136.1.3.2, EPG 136.7.2.1.6.1, and EPG 136.7.2.2.5.1. Added clarification of the requirement to have LPA preliminary plans reviewed and approved prior to submitting ROW plans for review and approval and provide the approval on a specific memo.
October 24, 2022
- EPG Section 403.1 has been revised primarily to incorporate a longstanding separate Word doc, which explained sampling, testing and acceptance procedures for projects with Superpave mixes. Additional revisions were made to update in accordance with current construction and materials specifications.
- 903.3.4.4 was updated to eliminate redundant 3" pipe post and update capacities.
October 21, 2022
- EPG 712.1.5 updated to reflect modified testing requirements for high strength bolts.
