| NCHRP 24-03 | Laboratory Evaluation of Piles Installed with Vibratory Drivers | Completed | |
| NCHRP 24-04 | Load Factor Design Criteria for Highway Structure Foundations | Completed | |
| NCHRP 24-05 | Downdrag on Bitumen-Coated Piles | Completed | |
| NCHRP 24-06 | Expert System for Stream Stability and Scour Evaluation | Completed | NCHRP Report 426 CAESAR: An Expert System for Evaluation of Scour and Stream Stability |
| NCHRP 24-07 | Countermeasures to Protect Bridge Piers from Scour | Completed | |
| NCHRP 24-07(2) | Countermeasures to Protect Bridge Piers from Scour | Completed | NCHRP Report 593 Countermeasures to Protect Bridge Piers from Scour |
| NCHRP 24-08 | Scour at Bridge Foundations: Research Needs | Completed | |
| NCHRP 24-09 | Static and Dynamic Lateral Loading of Pile Groups | Completed | |
| NCHRP 24-10 | Thermally Sprayed Metallic Coatings to Protect Steel Pilings | Completed | |
| NCHRP 24-11 | Guidelines for Geofoam Applications in Embankment Projects | Completed | NCHRP Report 529 Guideline and Recommended Standard for Geofoam Applications in Highway Embankments and Web-Only Document 65 Geofoam Applications in the Design and Construction of Highway Embankments |
| NCHRP 24-11(02) | Guidelines for Geofoam Applications in Slope Stability Projects | Completed | Research Results Digest. 380: Guidelines for Geofoam Applications in Slope Stability Projects |
| NCHRP 24-12 | Controlled Low-Strength Material For Backfill, Utility Bedding, Void Fill, and Bridge Approaches | Completed | |
| NCHRP 24-12(01) | Controlled Low-Strength Material For Backfill, Utility Bedding, Void Fill, and Bridge Approaches | Completed | |
| NCHRP 24-13 | Evaluation of Metal Tensioned Systems in Geotechnical Applications | Completed | |
| NCHRP 24-14 | Scour at Contracted Bridge Sites | Completed | NCHRP Web-Only Document 83 Scour at Contracted Bridges |
| NCHRP 24-15 | Complex Pier Scour and Contraction Scour in Cohesive Soils | Completed | NCHRP Report 516 Pier and Contraction Scour in Cohesive Soils |
| NCHRP 24-15(2) | Abutment Scour in Cohesive Materials | Completed | An unedited, completed final report for this project has been posted on the web with a link to it in the “Product Availability” section of this page. For more information see the “Status” section of this page. |
| NCHRP 24-16 | Methodology for Predicting Channel Migration | Completed | NCHRP Report 533 Handbook for Predicting Stream Meander Migration. |
| NCHRP 24-17 | LRFD Deep Foundation Design | Completed | |
| NCHRP 24-18 | Countermeasures to Protect Bridge Abutments from Scour | Completed | Terminated due to PI relocation. |
| NCHRP 24-18A | Countermeasures to Protect Bridge Abutments from Scour | Completed | NCHRP Report 587 Countermeasures to Protect Bridge Abutments from Scour. |
| NCHRP 24-19 | Environmentally Sensitive Channel- and Bank-Protection Measures | Completed | NCHRP Report 544 Environmentally Sensitive Channel- and Bank-Protection Measures |
| NCHRP 24-20 | Prediction of Scour at Bridge Abutments | Completed | An unedited, completed final report for this project has been posted on the web with a link to it in the “Product Availability” section of this page. For more information see the “Status” section of this page. |
| NCHRP 24-20(02) | Evaluation of Abutment-Scour Equations from NCHRP Projects 24-15(2) and 24-20 Using Field Data | Completed | Completed. An uncorrected draft, as submitted by the Contractor, is posted on line with a link in the Product Availability section at the bottom of this page. |
| NCHRP 24-21 | LRFD Soil-Nailing Design and Construction Specifications | Completed | NCHRP Report 701: Proposed LRFD Specifications for Soil Nailing Design and Construction. |
| NCHRP 24-22 | Selecting Backfill Materials for MSE Retaining Walls | Completed | Completed. An uncorrected draft, as submitted by the Contractor, will be posted on line with a link in the product availability section at the bottom of this page. |
| NCHRP 24-23 | Riprap Design Criteria, Specifications, and Quality Control | Completed | NCHRP Report 568 Riprap Design Criteria, Recommended Specifications, and Quality Control. |
| NCHRP 24-24 | Criteria for Selecting Numeric Hydraulic Modeling Software | Completed | NCHRP Web-Only Document 106 Criteria for Selecting Hydraulic Models |
| NCHRP 24-25 | Guidelines for Risk-Based Management of Bridges with Unknown Foundations | Completed | NCHRP Web-Only Document 107 Risk-Based Management Guidelines for Scour at Bridges with Unknown Foundations |
| NCHRP 24-26 | Effects of Debris on Bridge-Pier Scour | Completed | NCHRP Report 653: Effects of Debris on Bridge Pier Scour |
| NCHRP 24-27(01) | Evaluation of Bridge Scour Research: Pier Scour Processes and Predictions | Completed | The project final report is available as NCHRP Web-Only Document 175. |
| NCHRP 24-27(02) | Evaluation of Bridge-Scour Research: Abutment and Contraction Scour Processes and Predictions | Completed | The project final report is available as NCHRP Web-Only Document 181. |
| NCHRP 24-27(03) | Evaluation of Bridge-Scour Research: Geomorphic Processes and Predictions | Completed | The project final report is available as NCHRP Web-Only Document 177. |
| NCHRP 24-28 | LRFD Metal Loss and Service-Life Strength Reduction Factors for Metal-Reinforced Systems in Geotechnical Applications | Completed | The project final report is available as NCHRP Report 675. |
| NCHRP 24-29 | Scour at Bridge Foundations on Rock | Completed | NCHRP Report 717: Scour at Bridge Foundations on Rock |
| NCHRP 24-30 | Design Guidelines for Increasing the Lateral Resistance of Highway Bridge Pile Foundations by Improving Weak Soils | Final | |
| NCHRP 24-31 | LRFD Design and Construction of Shallow Foundations for Highway Bridge Structures | Final | |
| NCHRP 24-32 | Scour at Wide Piers and Long Skewed Piers | Completed | |
| NCHRP 24-33 | Development of Design Methods for In-Stream Flow Control Structures | Final | Completed. Published as NCHRP Report 795. |
| NCHRP 24-34 | Risk-Based Approach for Bridge Scour Prediction | Final | |
| NCHRP 24-35 | Guidelines for Certification and Management of Flexible Rockfall Protection Systems | Completed | Completed. Published as NCHRP Report 823 |
| NCHRP 24-36 | Scour at the Base of Retaining Walls and Other Longitudinal Structures | Final | |
| NCHRP 24-37 | Combining Individual Scour Components to Determine Total Scour | Final | Final Research Report is available online as NCHRP Web-Only Document 249 |
| NCHRP 24-38 | Development of Bridge Foundation Movement Criteria-- Phase I | Final | NCHRP terminated the awarded contract; The remaining work is completed under NCHRP Project 12-103 |
| NCHRP 24-39 | Evaluation and Assessment of Environmentally Sensitive Stream Bank Protection Measures | Completed | Completed. Published as NCHRP Report 822. |
| NCHRP 24-40 | Design Hydrology for Stream Restoration and Channel Stability at Stream Crossings | Final | |
| NCHRP 24-41 | Defining the Boundary Conditions for Composite Behavior of Geosynthetic Reinforced Soil (GRS) Structures | Final | NCHRP Web-Only Document 260 is now available. |
| NCHRP 24-42 | Underwater Installation of Filters Systems for Scour and Other Erosion Control Countermeasures | Final | The final report will be published in August 2018 |
| NCHRP 24-43 | Relationship Between Erodibility and Properties of Soils | Final | NCHRP Report 915 is now available. |
| NCHRP 24-44 | Guidelines for Managing Geotechnical Risks in Design-Build Projects | Final | |
| NCHRP 24-45 | Evaluating Mechanical Properties of Earth Material During Intelligent Compaction | Final | NCHRP Report 933 is now available. |
| NCHRP 24-46 | Development of an Implementation Manual for Geotechnical Asset Management for Transportation Agencies | Final | NCHRP Research Report 903 Volumes 1 and 2 available. |
| NCHRP 24-47 | Revised Clear-Water and Live-Bed Contraction Scour Analysis | Final | Research is complete. Published as Research Report NCHRP 971 and WOD 294 Training Manual. |
| NCHRP 24-48 | Develop a Formula for Determining Scour Depth around Structures in Gravel-bed Rivers | Final | Final report published as NCHRP Research Report 1031. |
| NCHRP 24-49 | Guidelines for Selection and Application of Manning’s Roughness Values in Two-Dimensional Hydraulic Models | Final | The Final Report is published as NCHRP Research Report 1077 |
| NCHRP 24-50 | Rewrite of the AASHTO Drainage Manual | Completed | Publication decision pending. |
| NCHRP 24-51 | Effects of Construction Installation Methods on the Design and Performance of Drilled Shaft Foundations | Active | Research in progress. |
| NCHRP 24-52 | Guidelines for Resilient Erosion- and Sediment-Control Practices | Active | Research in progress |