Update information in Chapter 2 regarding investigation around suspected karst formations, and provide more guidance when recording groundwater elevations during drilling operations.

Make minor changes to the laboratory testing protocol for shear strength determination in Chapter 2.

Update procedure in Chapter 3 on ‘Drill Hole Filling’ with current standard practices using mix of bentonite and/or grout.

Include limits of any needed Temporary Special Shoring in Retaining Wall layouts standard specifications which would apply to Temporary Special Shoring in Chapter 6.

Eliminate prior soil parameter assumptions on nailed embankments to account for independent analysis of wall systems in Chapter 6.

Highlight in Chapter 6 the importance of utilizing proper parameters in the RW(MSE)DD sheet to standardize design.

Update the minimum criteria for nail diameters in rock nailed walls section in Chapter 6.

Provide greater clarification in Chapter 7 that global stability design factors of safety should be at minimum 1.3 and 1.5.

geologic layer terminology clarification in Sections 1 and 2;

updating guidance for Scour Summary Sheet and submission of Form 2605 into the bridge inspection system;

updating method for calculating scour at bridge channels including reference to NCHRP reports;

updating the scour guidance at bridge class culverts.