• Southern Methodist University, B.S. in Civil Engineering 1963; Sigma Phi, Chi Epsilon Honoraries
• University of Denver, Graduate Work
• University of Colorado, Graduate Work
• OSHA Confined Space Certification
• Nuclear Density Meter Certification

[1994 TO PRESENT] Civil Engineering Consultant: Lakewood, CO

• Expert Witness/ Forensic Investigation of Buried Pipe Failures
• Present Seminars on Pipeline Installation
• Conduct Workshops on Soil Classification
• Review Specifications, Manuals, Research Proposals, & Standards
• Conduct Research on Soil Modulus

[1963 to 1994] US Bureau of Reclamation: Lakewood, CO
Research on Buried Pipe Behavior, Soil Cement, Flowable Fill

Head, Soil Testing Laboratory
• Supervised 20-30 engineers and technicians conducting soil tests ranging from index tests to triaxial shear tests.
Head, Geotechnical Engineering Section
• Supervised 20-30 engineers in analyzing and applying soil test results for earth dams, canals, pipelines, and building foundations
Director, Geotechnical Seminars, Short Courses, and Earth Schools
• Organized and conducted seminars and short courses on soil investigations, soil classification, construction control, soil testing, and inspection
• Taught classes in soil classification, soil testing, field construction control, soil-cement construction, pipe installation, and soil compaction

• 1967 to 1994 US Bureau of Reclamation, several awards for Superior Service
• 1996 Stephen D. Bechtel Pipeline Engineering Lifetime Achievement Award from ASCE
• 1999 ASTM Award for Excellence in Symposium and Publication Management
• Several ASTM Standard Development Awards

• Pipeline Installation, Relativity Publishing, 1996
• Pipeline Installation 2.0, Relativity Publishing, 2015
• The Unified Soil Classification System, Relativity Publishing, 2015:
  • Volume 1 – Laboratory Soil Classification
  • Volume 2 – Visual Soil Classification
  • Volume 3 – Supplemental Information
• Co-Editor, The Design and Application of Controlled Low-Strength Materials, ASTM STP 1331, 1998
• Co-Editor, Innovations in Controlled Low-Strength Materials, ASTM STP 1459, 2002
• Contributor, Quality Control of Soil Compaction Using ASTM Standards, ASTM Manual 70, 2011

• American Society of Civil Engineers
• American Water Works Association
• American Construction Inspectors Association
• American Society for Testing
  • Committee on Soil and Rock, D-18
  • Committee on Plastics Piping, F-17
  • Committee on Vitrified Clay Pipe C-04

Young, Woolridge, Paulden, Self, Farrr & Griffin

• Wheeler Ridge-Maricopa Water Storage Dist vs. United Technology Corp
• Gave deposition as US Government employee

United Technologies Corporation

• San Marcos County Water District v. UTC Inc
• Brown and Bain Attys at Law, Palo Alto CA
• Deposition as pipe installation expert
• Gave deposition as US Government employee
• Settled before court

Amoco Corporation

• Cawelo Water District vs. Amoco
• Borton, Petrini, and Conron, Los Angeles CA
• Deposition and testimony as pipe installation expert
• Gave deposition and testified in court as US Government employee

US Bureau of Reclamation       

• KIT-SAN-AZUSA vs. United States
• Department of Justice, Washington DC
• Testified in court as expert in soil compaction and construction quality control
• Gave testimony as US Government employee

Cash Construction Co of Texas, Inc, Pflugerville TX

• Cash Construction Co vs. City of Baton Rouge
• Smith Currie & Hancock, Attys at Law, Atlanta GA
• Investigated installation problems on 60-in HDPE pipe
• Gave deposition and court testimony as pipe installation expert

Moretrench Environmental Services

• Arbitration Prince George’s County Project vs. Construx Inc
• Macfarlane Ferguson & McMullen, Attys at Law, Tampa FL
• Retained as pipe installation expert
• Settled before court

US Bureau of Reclamation

• Domson Inc vs. United States, Department of Justice, Washington DC
• Retained as pipe installation expert
• HDPE dual pipe drain pipe installation
• Did investigation and analysis of pipeline failure
• Settled before court

Boughton’s Precast

• Colorado Department of Transportation vs. Kirkland Construction vs. Boughton’s Precast
• Oviatt, Clark and Gross, LLP, Wheat Ridge CO
• Retained as pipe installation expert
• Concrete pipe installation
• Did investigation and analysis of pipeline problems
• Settled before court

Hancor, Inc

• State Distributing vs. Hancor, Inc
• Kay Casto & Chaney, PLLC, Charleston WV
• Retained as pipe installation expert
• HDPE dual pipe drain pipe installation
• Did investigation and analysis of pipeline failure
• Settled before court

HDR Engineering, Inc

• Brazos River Authority vs. Pate & Pate Enterprises, Inc vs. HDR Engineering , Inc
• Knolle, Holcomb, Kothmann & Callahan, Austin TX
• Retained as pipe installation expert
• Settled before court

Thalle Construction

• City of Charlotte vs. Thalle Construction

Smith Cooksey & Vickstrom, PLLC, Charlotte NC

• Retained as pipe installation expert
• Concrete pipe installation
• Did investigation and analysis of pipeline failure
• Settled before court

Parker Excavating

• Parker Excavating vs. Castle Rock Construction
• Sherman & Howard, PLLC, Colorado Springs CO
• Retained as pipe installation expert
• Concrete pipe installation
• Gave deposition and court testimony as pipe installation expert

Safeco Insurance

• D’Alessando Contracting Group and Safeco Ins vs. Genesee County Drain Commissioner
• Watt Tieder Hoffar & Fitzgerald LLP, Irvine CA
• Retained as pipe installation expert
• Concrete pipe installation
• Did investigation and analysis of pipeline failure
• Settled before court

Mission Clay Products

• Floyd Johnson Construction vs. Mission Clay Products
• Lanak & Hanna PC, Orange CA
• Retained as pipe installation expert
• Clay pipe installation
• Settled before court

Eric Myers

• Stanley Trenching, Inc vs. Eric Myers and Megan Myers
• Retained as pipe installation expert
• PVC pipe installation
• Decided in favor of defendant

Speer Bros, Inc

• O’Toole McLaughin Dooley Pecora law firm
• Timothy Betton vs. Burgess and Niple, et. al.
• PVC pipe installation

Chapman Engineering

• Amarillo TX vs. Fuller, Brand, and Mission Clay Pipe
• Retained as pipe installation expert
• Brandi and Mission Clay settled

Reed Engineering

• Amarillo vs. Fuller
• Retained as pipe installation expert

• Chairman, ASTM Subcommittee on Education and Training, 1980-84
• Chairman, ASTM Subcommittee on Soil Classification, 1984-1990
• Co-Chairman, ASTM Symposium on The Design and Application of Controlled Low-Strength Materials (Flowable Fill), St Louis MO, June 19-20 1997
• Co-Chairman, ASTM Symposium on Innovations in Controlled Low-Strength Materials (Flowable Fill), Denver CO, June 19-20 2003
• ASCE Task Committee on Revision of MOP 117, “Inspecting Pipeline Installation” 2012- Present
• AWWA Committee, New Standard for Installation of Concrete Pressure Pipe
• AWWA consultant to Committee on AWWA Manual M23 PVC Pipe – Design and Installation
• AWWA consultant to Committee on AWWA Manual M55 PE Pipe – Design and Installation
• AWWA consultant to Committee on AWWA Manual M9 Concrete Pressure Pipe
• Principal Author of ASTM Standards:
  • D 2487 Classification of Soils for Engineering Practice (Unified Soil Classification System)
  • D 2488 Practice for Description and Identification of Soils (Visual-Manual Procedure)
  • D 4564 Density in Place by the Sleeve Method
  • D 4832 Test Method for Preparation and Testing of Soil-Cement Slurry Test Cylinders
  • D 4914 Test Methods for Density of Soil and Rock in Place by the Sand Replacement Method in a Test Pit
  • D 4943 Test Method for Shrinkage Factors of Soil by the Wax Method
  • D 5030 Test Methods for Density of Soil and Rock in Place by the Water Replacement Method in a Test Pit
  • D 5080 Test Method for Rapid Determination of Percent Compaction
  • D 5434 Guide for Field Logging of Subsurface Explorations of Soil and Rock
  • F 1668 Guide for Construction Procedures for Buried Flexible Pipe

Design and Installation of Buried Pipes: ASCE Continuing Education Course, American Society of Civil Engineers

• 1995 Boston MA: June 7-9; Irvine CA: Sept 18-20
• 1996: Indianapolis: Feb 1-2; Tampa FL: March 7-8; Houston TX: April 1-2; San Francisco CA; Oct 14-15; Atlanta GA: Nov 4-5
• 2000: Seattle WA: April 27-28; Columbus OH: May 9-10; Denver CO: Oct 12-13
• 2001: New Orleans LA: April 26-27; San Diego CA: May 10-11
• 2002: Las Vegas NV: Feb 7-8; Orlando FL: Mar 7-8; Raleigh NC: Aug 21-22: Progress Energy
• 2003: Sacramento CA: Feb 26-27: Indian Health Service
• 2004: Portland OR: Feb 5-6; Denver CO: Mar 4-5
• 2005: Memphis TN: Feb 10-11; San Francisco: Mar 3-4
• 2006: Anaheim CA: Feb 2-3; St Louis MO: Mar 2-3; Los Angeles CA; March 28-29: LA Water & Power; Sacramento CA: April 10-11: Sacramento Sewer District
• 2007: Las Vegas NV: Feb 15-16; Pittsburgh PA: Mar 29-30
• 2008: Seattle WA: Feb 28-29; Denver CO: March 20-21; Oakland CA: June 9-10: East Bay Municipal Utility District
• 2009: Orlando FL: Feb 19-20; San Diego CA: Mar 12-13
• 2010: Pittsburgh PA: Feb 4-5; Phoenix AZ: Mar 25-26
• 2011: San Francisco CA: Jan 13-14; Nashville TN: Mar 10-11; Los Angeles CA: June 27-30: JM Eagle Corp
• 2012: New York City NY: Feb 16-17; Denver CO: Mar 29-30
• 2013: San Diego CA: Mar 7-8
• 2014: New Orleans LA: April 24-25
• 2015: Boston MA: May 7-8: Massachusetts Water Regional Authority; Santa Clara CA: July 28-29: Santa Clara Valley Water District; Tacoma WA: August: 13-14: City of Tacoma; San Diego CA: Sept 10-11; Boston MA: Sept 29-30:
• Massachusetts Water Regional Authority; American Fork UT: Nov 19: Franson Engineers, Inc
• 2016: Nashville TN: April 29-30
• 2017: Lubbock TX: March 27-28: City of Lubbock
• 2018: Los Angeles CA: Feb 22: Los Angeles County Sewer Districts; Orlando FL: March 20; Los Angeles CA: May 17: Los Angeles County Sewer Districts; Los Angeles CA: May 19: Los Angeles County Sewer Districts
• 2019: New Orleans LA: June 21; Las Vegas NV: Sept 24; Oakland CA: Oct 30-31: East Bay Municipal Utility District; Portland OR: Nov. 15
• 2020: Yonkers NY: Feb 19: Sevin Engineers; Virtual: June 10-11: San Francisco Public Utility District
• 2021: Virtual: Sept 30-Sept 1: Orange County Utilities, Florida; Virtual: Dec 14-15: Prince William County Service Authority, Virginia

ASCE Guided On-Line Course: Installation of Buried Pipe; May 24-July 2, 2021; October 25 to December 3, 2021; July 18-August 26, 2022; October 24-December 2, 2022

Selection and Inspection of the Soil in a Buried Soil-Pipe System
Keynote Speaker, Fuerges Clay Pipe Association, Baden-Baden Germany, 1986

Pipeline Installation
Speaker, Piping Systems Institute, Utah State University, Logan UT, December 4-7, 1989

Buried Pipes
University of Colorado at Denver, Continuing Engineering Education, December 9-11, 1992; Three-day seminar with Dr. Reynold Watkins, Utah State University; One half-day on installation and flowable fill

Buried Pipes
University of Colorado at Denver, Continuing Engineering Education, December 14-16, 1994; Three-day seminar with Dr. Reynold Watkins, Utah State University; One day on installation and flowable fill

Pipeline Installation
Hancor Pipe Co – 2 hour presentations: Mar 1, 1995: Kansas City MO; Mar 2, 1995: Minneapolis MN; Feb 20, 1996: Omaha NE; Feb 21, 1996: St Louis MO; Feb 23, 1996: Chicago IL; Feb 26, 1996: Dallas TX; Feb 28, 1996: Louisville KY; Apr 28, 2005: Baltimore MD; May 31, 2005: Sacramento CA

Basics of Pipe-Soil Interaction
Speaker, American Concrete Pipe Association, 1996 Short Course School, Indianapolis IN: Feb 29 – Mar 3 1996

Buried Pipes
University of Colorado at Denver, Continuing Engineering Education, December 11-13, 1996; 3-day seminar with Dr. Reynold Watkins, Utah State University; One day on installation and flowable fill

Pipeline Installation
Suncoast Public Works Academy, Sarasota County Technical Institute, Sarasota FL: May 16, 1999

Pipeline Installation
Suncoast Public Works Academy, Sarasota County Technical Institute, Sarasota FL: September 20, 2002

Backfill keeps the Alligators Away
PPI Seminar Corrugated HDPE Drain Pipe Durham NC, Sept 12, 2006

Pipeline Installation
MWH Consulting Engineers, Denver CO, April 2007

Pipeline Installation
US Bureau of Reclamation, Denver CO, March 17-18, 2008

Pipeline Installation for Inspectors
Sacramento County Sanitation District, Sacramento CA, June 5-6, 2008

Pipeline Installation
Brown & Caldwell Consulting Engineers, Denver CO, June 17, 2008

Soil Groups for Pipeline Installation
Speaker, Uni-Bell PVC Pipe Association Annual Meeting, Marco Island FL, April 20, 2010

Pipeline Installation
Metro Wastewater Reclamation District, Denver CO, April 18-19, 2010 Denver CO

The Inspector will be here next Tuesday Keynote Address
ASCE Pipelines 2011 Conference, Seattle WA, July 2011

The Crisis in Pipeline Installation Inspection Keynote Address
International Conference on Pipeline and Trenchless Technology, Beijing China, October 2011

Pipeline Installation
Sanitation District No. I, Fort Wright KY, August 2012

Sustainable Flowable Fill Keynote Address
International Conference on Pipeline and Trenchless Technology, Wuhan China, October 2012

Pipe Deflection, Soil Stiffness, and Flowable Fill Workshop
International Conference on Pipeline and Trenchless Technology, Wuhan China, October 2012

Pipeline Installation
US Bureau of Reclamation, Denver CO, February 12-13-14, 2013

Pipeline Installation
Pima-Maricopa Irrigation District, Sacaton AZ

Installation of Large Diameter Pipe
Diamond Plastics, Grand Island NE, March 30, 2016; Diamond Open House

Installation of Concrete Pipe
Oldcastle Precast Products, Overland Park KS, April 21, 2016

Installation of Large Diameter Pipe
Diamond Plastics, Grand Island NE, January 26, 2017 to sales staff

Installation of Large Diameter Pipe
Diamond Plastics, Grand Island NE, April 19, 2017; Diamond Open House

Installation of Large Diameter Pipe
Diamond Plastics, Casa Grande AZ, Nov 8, 2017; Diamond Open House

Pipeline Installation
Miller and Assoc. Consulting Engineers, Kearney NE, Feb 7, 2018

Installation of Large Diameter Pipe
Diamond Plastics, Grand Island NE, May 2, 2018; Diamond Open House

Installation of Large Diameter Pipe
Diamond Plastics, Grand Island NE, May 8, 2019; Diamond Open House

Installation of Large Diameter Pipe
Virtual Seminar, May 8, 2021; Diamond Open House

Pipeline Installation
US Bureau of Reclamation, Denver CO, April 16-18, 2019
US Bureau of Reclamation, Farmington NM, December 3-4, 2019

Pipeline Installation Guided Continuing Online Education course for American Society of Civil Engineers

• May 10 to June 18, 2021
• Oct 25 to Dec 3, 2021
• July 17 to Aug 26, 2022
• Oct 24 to Dec 2, 2022

The Inspector will be here next Wednesday Keynote Address
ASCE Pipelines 2022 Conference, Indianapolis IN, July 2022

Soil Classification School, USCS Visual Classification Workshop
(Organizer, Speaker, Hands-On Instruction with Attendees)

• US Bureau of Reclamation, Denver CO, May 17-19, 2007
• US Bureau of Reclamation, Denver CO, Feb 12-14, 2008
• US Bureau of Reclamation, Denver CO, March 3-5, 2010
• US Bureau of Reclamation, Denver CO, March 3-5, 2011
• US Bureau of Reclamation, Denver CO, March 6-8, 2012
• US Bureau of Reclamation, Denver CO, Jan 12-14, 2016
• US Bureau of Reclamation, Denver CO, March 8-10, 2016 (for Corps of Engineers)
• US Bureau of Reclamation, Denver CO, May 22-24, 2018
• US Bureau of Reclamation, Denver CO, Nov 15-17, 2022

Presentations at Underground Construction Technology

• Pipeline Installation Jan 2011: Houston TX
• Sustainable Flowable Fill Jan 2013: Houston TX
• Installation Advances in Second Edition of AWWA M55 HDPE Pipe Jan 2020: Ft. Worth TX

Soil Classification and Problem Soils Western Area Power Administration
Jan 31, 2013: Cranberry Township PA

• Pettibone, H.C., and Amster Howard, “Distribution of Soil Pressures on Concrete Pipe,” Journal of the Pipeline Division, ASCE, Vol 93 No PL 2, July 1967
• Howard, Amster, “Buried Load Tests on Flexible Pipe,” Buckling of Structures Symposium, Rocky Mountain Section, Society for Experimental Stress Analysis, 1968
• Howard, Amster, “Laboratory Load Tests on Buried Flexible Pipe,” AWWA Journal, October 1972
• Howard, Amster, and C.E. Selander, “Laboratory Load Tests on Buried Reinforced Thermosetting, Thermoplastic, and Steel Pipe,” Proc, 28th Annual Technical Conference, Reinforced Plastics/ Composites Institute, The Society of the Plastics Industry, 1973; Also published in: AWWA Journal, September 1974
• Howard, Amster, “Field Test Deflections of Reinforced Plastic Mortar Pipe,” Transportation Research Record 518, 1974
• Howard, Amster, “Modulus of Soil Reaction Values for Buried Flexible Pipe,” Journal of the Geotechnical Engineering Division, ASCE, Vol 103 No GT 1, Jan 1977
• Howard, Amster, “The USBR Equation for Predicting Flexible Pipe Behavior,” Proceedings of the International Conference on Underground Plastic Pipe, New Orleans Louisiana, March 1981
• Howard, Amster, “Diametral Elongation of Buried Flexible Pipe,” Proceedings of the International Conference on Underground Plastic Pipe, New Orleans Louisiana, March 1981
• Lang, D.C., and Amster Howard, “Buried Fiberglass Pipe Response to Field Installation Methods,” Proceedings of ASCE Conference Advances in Underground Pipeline Engineering, Madison Wisconsin, August 1985
• Howard, Amster, “Selection and Inspection of the Soil in a Buried Soil-Pipe System,” Proceedings, European Federation for the Vitrified Clay Pipe Industry Symposium, Baden-Baden, Germany, September 1986
• Howard, Amster, “Load Deflection Field Test of 27-inch PVC Pipe,” Buried Plastic Pipe Technology, ASTM STP 1093, American Society for Testing and Materials, 1990
• Howard, Amster, “Soil-Cement Slurry Pipe Bedding, Controlled Low Strength Materials, ACI SP-150, American Concrete Institute, 1994
• Howard, Amster, “Soil-Cement Slurry Bedding for Plastic Pipe,” Buried Plastic Pipe Technology, ASTM STP 1222, American Society for Testing and Materials, 1994
• Howard, Amster, Y. Spridzans, and B.J. Schrock, “Latvia Field Test of 915 mm Fiberglass Pipe,” ASTM STP 1222, American Society for Testing and Materials, 1994
• Howard, Amster, “Time-Deflection Field Test of 120-cm Steel, Fiberglass, and Pretensioned Concrete Pipe,” Proceedings of ASCE Conference Advances in Underground Pipeline Engineering: 2nd International Conference, Seattle Washington, June 1995
• Howard, Amster, “Standard Practice for Installing Pipe Using Flowable Fill,” The Design and Application of Controlled Low-Strength Materials, ASTM 1331, American Society for Testing and Materials, 1997
• Howard, Amster, “Flowable Fill Solves Pipe Backfilling Problems,” Proceedings of the Fourteenth International Conference on Soil Mechanics and Foundation Engineering, Hamburg Germany, September 1997, Vol 3, pp 1609-1612
• Howard, Amster, “Proposed Standard Practice for Installing Buried Pipe Using Flowable Fill,” The Design and Application of Controlled Low-Strength Materials (Flowable Fill), ASTM STP 1331, American Society for Testing and Materials, 1998
• Howard, Amster, “The Reclamation E′ Table 25 Years Later,” Proceedings, Plastics Pipes XIII, Washington DC, Oct 2-5, 2006
• Howard, Amster and Bruce Howard, “A Discussion of E Prime versus Depth,” Proceedings of ASCE Conference Pipelines 2008, Atlanta GA, July 22-25, 2008
• Howard, Amster and Linda Bowles, “Flowable Fill and the Ridges Basin Inlet Conduit,” Proceedings of ASCE Conference Pipelines 2008, Atlanta GA, July 22-25, 2008
• Howard, Amster, “Uniform Soil Groups for Pipe Installation,” Proceedings of ASCE Conference Pipelines 2009, San Diego CA, August 2009
• Howard, Amster, “Composite E Prime,” Proceedings of ASCE Conference Pipelines 2009, San Diego CA, August 2009
• Howard, Amster, “Deflection Lag, Time Lag, and Load Lag of Buried Flexible Pipe,” ASTM Symposium on Plastic Pipe, Atlanta GA, November 2009 
• Howard, Amster, “How to Crawl Through a Pipe,”  ASTM Symposium on Plastic Pipe, Atlanta GA, November 2009 
• Sayer, Ken and Amster Howard, “Twenty-One Foot Diameter Flexible Pipe – Design,” Proceedings of ASCE Conference Pipelines 2010, Keystone CO, August 2010
• Randolph, Randy D. and Amster Howard, “Twenty-One Foot Diameter Flexible Pipe – Construction,” Proceedings of ASCE Conference Pipelines 2010, Keystone CO, August 2010
• Howard, Amster, “Soil Compaction Target Values for Pipeline Installation,” Proceedings of ASCE Conference Pipelines 2011, Seattle WA, July 2011
• Howard, Amster, “Constrained Modulus of Crushed Rock for Pipeline Embedment,” Proceedings of ASCE Conference Pipelines 2011, Seattle WA, July 2011
• Howard, Amster, “Five Types of Pipeline Trenches,” Conference Proceedings ICPTT 2011, Beijing China, October 2011
• Howard, Amster, “Sustainable Flowable Fill,” Proceedings of ASCE Conference Pipelines 2012, Miami Beach, August 2012
• Howard, Amster, Matt Gaughan, Mark Wilkerson, and Shelly Hattan, “Lean, Green, and Mean,” Proceedings ICSDEC2012, Fort Worth TX, November 2012
• Howard, Amster, “’Updates – Uniform Soil Groups, Maximum Density of Gravel, Percent Compaction,” Proceedings ASCE Conference Pipelines 2013, Fort Worth TX, June 2013 
• Howard, Amster, Jaime Reyes, David Marshall, Matt Gaughan, and Shelley Hattan, “Native Soil Flowable Fill Investigation for the IPL,” Proceedings ASCE Conference Pipelines 2013, Fort Worth TX, June 2013 
• Howard, Amster, Ardita Dushi, David Marshall, Matt Gaughan, and Shelley Hattan, “Selection of Native Soil E Prime for the IPL,” Proceedings ASCE Conference Pipelines 2013, Fort Worth TX, June 2013 
• Boschert, Jeff and Amster Howard, “Importance of Haunching,” Proceedings ASCE Conference Pipelines 2014, Portland OR, August 2014 
• Turney, Matt, Amster Howard, and John Bambei, “Compaction of Pipe Zone Material by Saturation and Internal Vibration,” Proceedings ASCE Conference Pipelines 2015, Baltimore MD, August 2015 
• Boschert, Jeff and Amster Howard, “Updates to ASTM C12,” Proceedings ASCE Conference Pipelines 2015, Baltimore MD, August 2015 
• Howard, Amster and Shah Rahman, “Review of Design Methods in AWWA Manuals for Various Flexible Pipe,” Proceedings ASCE Conference Pipelines 2020, virtual
• Howard, Amster and Camille Rubeiz, “2020 Second Edition of AWWA Manual M55 HDPE Pipe,” Proceedings ASCE Conference Pipelines 2020, virtual
• Howard, Amster and Mark Gemperline, “Critique of the CANDE/AASHTO Soil Groups,” Proceedings ASCE Conference Pipelines 2020, virtual      
• Temple, Chase and Amster Howard, “Trash to Treasure: How Lime Turns Bad Soil into Pipe Backfill” Proceedings ASCE Conference Pipelines 2021, virtual
• Howard, Amster, “2020 Second Edition AWWA M55 HDPE,” Plastic Pipes XX, Amsterdam, The Netherlands, September 2021
• Howard, Amster, “Flowable Fill for Plastic Pipe,” Plastic Pipes XX, Amsterdam, The Netherlands, September 2021
• Gibson, Rusty., and Amster Howard, “New AWWA Standard for the Installation of Concrete Pressure Pipe” Proceedings ASCE Conference Pipelines 2022, Indianapolis IN     
• Howard, Amster (2023), “Inspector Training,” Underground Construction Technology Conference, Orlando FL
• Howard, Amster, John Susong, and Kent Carlson (2023), “But Cracks?”  Proceedings ASCE Conference Pipelines 2023, San Antonio TX 
• Howard, Amster, and Mark Gemperline (2023), “0.7 OD Embedment Compaction,” Proceedings ASCE Conference Pipelines 2023, San Antonio TX      
• Howard, Amster (2023), “Myriad of Choices for Buried Pipe Installation,” Plastic Pipes XXI, Orlando FL USA
• Howard, Amster (2023), “Cut-and-Cover Pipelines in Poor Trench Walls,” Plastic Pipes XXI, Orlando FL USA

• Howard, A.K., “The Revised ASTM Standard on the Unified Soil Classification System, D 2487-83,” ASTM Geotechnical Testing Journal, December 1984.
• Howard, A. K., “The Revised ASTM Standard on the Description and Identification of Soils (Visual-Manual Procedure),” ASTM Geotechnical Testing Journal, December 1987.
• Howard, A. K. and Horz, R. C., “Minimum Test Specimen for Gradation Analysis,” ASTM Geotechnical Testing Journal, September 1988.
• Howard, A. K., “Minimum Test Specimen Mass for Moisture Content Determination,” ASTM Geotechnical Testing Journal, March 1989.

• Casias, T.J., And A.K. Howard, “Twenty-Year Performance of Soil-Cement Dam Facings,” Proceedings of the International Conference on Case Histories in Geotechnical Engineering, St. Louis, Missouri, May 1984.