Design Memos
Design memos are listed by topic. They open in PDF format. Signed originals of the following memos are filed in the Helena Construction and/or Design Office. Memos are sortable by column headers.
| Category | Title/Subject | Released |
|---|---|---|
| Erosion Control & Environmental | Erosion Control Plans Development Process | 04/15/2013 |
| Signing & Pavement Markings | Type IX Sign Sheeting – Application | 01/14/2013 |
| Signing & Pavement Markings | Horizontal Alignment Sign Selection | 01/11/2013 |
| Signing & Pavement Markings | Durable Interim Striping | 11/30/2012 |
| Rumble Strips | Rumble Strip Guidance | 11/30/2012 |
| Signing & Pavement Markings | Temporary Striping | 11/16/2012 |
| Surfacing & Typical Sections | Revised Rounding Criteria for Subgrade Widths | 11/08/2012 |
| Surfacing & Typical Sections | Blotter | 10/31/2012 |
| Surfacing & Typical Sections | Final Sweeping and Brooming | 10/15/2012 |
| Erosion Control & Environmental | Temporary Erosion Control | 09/12/2012 |
| Traffic Control | Traffic Control and Sequence of Operation | 08/27/2012 |
| Surfacing & Typical Sections | Cement Treated Pulverized Base | 05/25/2012 |
| Surfacing & Typical Sections | 30-year Pavement Design at Bridge Ends | 05/24/2012 |
| Hydraulics | Cleaning Culverts and Cattle Guards | 05/15/2012 |
| Erosion Control & Environmental | Wetlands Table in Plans | 05/09/2012 |
| Surfacing & Typical Sections | Cement Treated Base (see supplemental 05/25/12) |
05/02/2012 |
| Traffic Control | Guidelines - Interstate Median Crossovers | 02/28/2012 |
| Plans Preparation | Quantity Splits Revision | 02/15/2012 |
| Curbs, Ramps, and Sidewalk | ADA Curb Ramp Design Requirements | 02/10/2012 |
| Signing & Pavement Markings | Delineation on Non-Interstate Roadways | 02/07/2012 |
| Curbs, Ramps, and Sidewalk | Sidewalk Permit - Revised | 01/31/2012 |
| Roadside Barrier | Concrete Barrier Compliance | 01/05/2012 |
| Surfacing & Typical Sections | Aggregate Treatment | 01/03/2012 |
| Roadside Barrier | Hardware Compliance - Concrete Barrier | 12/02/2011 |
| Surfacing & Typical Sections | PTW Surfacing/Subgrade Treatment | 10/28/2011 |
| Hydraulics | Embankment Protectors at Bridge Ends | 10/19/2011 |
| Roadside Barrier | W-Beam Guardrail Height | 10/04/2011 |
| Traffic Control | Median Crossover Changes (see update 02/28/12) |
07/06/2011 |
| Grading | Mass Diagram in Blue Sheet Plans | 06/30/2011 |
| Rumble Strips | Edge Line Rumble Strip Evaluation | 06/14/2011 |
| Surfacing & Typical Sections | Type I and Type II Cover Material Selection | 04/29/2011 |
| Surfacing & Typical Sections | Project Specific Asphalt Contents | Percent Asphalt Map | 04/29/2011 |
| Surfacing & Typical Sections | Bituminous Prime (see update "Aggregate Treatment" 01/03/12) |
02/28/2011 |
| Bridge | Specifications for Concrete used in Bridges | 02/08/2011 |
| Plans Preparation | Reference Posts on Title Sheet | 01/13/2011 |
| Fencing & Right-of-Way | Wildlife Friendly Fence Details | 12/30/2010 |
| Curbs, Ramps, and Sidewalk | Public Rights-of-Way Accessibility Guidelines (PROWAG) | 11/19/2010 |
| Signing & Pavement Markings | Sign Replacement to Maintain Minimum Sign Retroreflectivity and Sign Sheeting Policy | 10/06/2010 |
| Signing & Pavement Markings | Policy on Sign Sheeting Materials for Permanent Signs | 09/29/2010 |
| Surfacing & Typical Sections | PTW Surfacing/Subgrade Treatment (see update 10/28/2011) |
09/23/2010 |
| Roadside Barrier | W-Beam Guardrail Height (see update 10/04/2011) |
09/13/2010 |
| Plans Preparation | Scales on Title Sheet | 08/27/2010 |
| Hydraulics | Reinforced Concrete Box - Steel Pipe Options | 08/24/2010 |
| Curbs, Ramps, and Sidewalk | Public Rights-of-Way Accessibility Guidelines (PROWAG) Adopted | Guidelines | 08/17/2010 |
| Hydraulics | New RCP Fill Height Tables | 08/13/2010 |
| Hydraulics | Culverts - Abandon in Place | 06/25/2010 |
| Grading | Shrink/Swell Factors in Grading Frames | 03/24/2010 |
| Roadside Barrier | Guardrail End Section Widening - Modification | 02/10/2010 |
| Surfacing & Typical Sections | Bituminous Prime (see update 02/28/11) |
01/15/2010 |
| Grading | Balanced Earthwork | 01/13/2010 |
| Erosion Control & Environmental | Erosion Control Blanket and Turf Reinforcement Mat | 12/17/2009 |
| Erosion Control & Environmental | Furrow Ditches - Clarification | 12/17/2009 |
| Bridge | Concrete Deck, Assumed Sacrificial Wearing Surface and Concrete Strength | 12/02/2009 |
| Erosion Control & Environmental | Furrow Ditches (see supplemental 12/17/09) |
11/30/2009 |
| Plans Preparation | Significant Figures in Road Plans | 11/12/2009 |
| Roadside Barrier | Concrete Barrier Installation - Clarification | 11/12/2009 |
| Roadside Barrier | Concrete Barrier Installation (see supplemental 11/12/09) |
10/20/2009 |
| Miscellaneous | Type B Scale Sites | 09/14/2009 |
| Surfacing & Typical Sections | Widening for Future Paving | 04/16/2009 |
| Miscellaneous | Electrical Special Provisions | 03/26/2009 |
| Surfacing & Typical Sections | Recycled Surfacing Options | 03/16/2009 |
| Surfacing & Typical Sections | Use of Cold Millings in Federal-Aid Projects | 03/10/2009 |
| Hydraulics | Special Culvert Installation Guidelines | Details | 02/20/2009 |
| Surfacing & Typical Sections | Roadway Width Decision Process (also see Design Guidelines 08/05/2008) |
02/13/2009 |
| Surfacing & Typical Sections | Modified Surfacing Design Requirements | 02/09/2009 |
| Surfacing & Typical Sections | Application Rate - Seal (CRS-2P) | 01/12/2009 |
| Roadside Barrier | Guardrail End Section Widening (see update 02/10/10) |
11/26/2008 |
| Surfacing & Typical Sections | Fog Seal and Isolation Lifts | 10/06/2008 |
| Grading | Mass Diagram and Grading Frames | 08/19/2008 |
| Miscellaneous | Design Guidelines (see supplemental 02/13/09) |
08/05/2008 |
| Grading | Mass Diagrams (see supplemental 08/19/08 and update 06/30/11) |
07/07/2008 |
| Surfacing & Typical Sections | Plant Mix and Aggregate Treatment | 06/11/2008 |
| Miscellaneous | Contract Time Calculation Procedures | 06/03/2008 |
| Curbs, Ramps, and Sidewalk | Curb Dimensions | 04/30/2008 |
| Miscellaneous | Specialty Items | 04/25/2008 |
| Surfacing & Typical Sections | Chip Seal Policy | 03/18/2008 |
| Surfacing & Typical Sections | Aggregate Treatment | 02/28/2008 |
| Surfacing & Typical Sections | Tack and Aggregate Tack Quantities | 01/08/2008 |
| Surfacing & Typical Sections | Fog Seal (see update 10/06/08) |
12/28/2007 |
| Grading | Haul Quantities | 12/21/2007 |
| Miscellaneous | Worker Visibility | 11/16/2007 |
| Plans Preparation | Urban-Rural Lengths of Roadways | 09/25/2007 |
| Hydraulics | Alternative Culvert Pipe Material Selection Guidelines | 06/12/2007 |
| Fencing & Right-of-Way | Wildlife Fence Issues | 04/06/2007 |
| Surfacing & Typical Sections | Road Design Manual - Chapter 9: Superelevation | 01/08/2007 |
| Plans Preparation | Project Limits | 01/05/2007 |
| Plans Preparation | Horizontal Curve Data | 11/29/2006 |
| Grading | Embankment-in-Place | 11/27/2006 |
| Grading | Culvert Excavation - Clarification | 11/27/2006 |
| Grading | Culvert Excavation | 11/17/2006 |
| Miscellaneous | Special Provisions Format | 07/31/2006 |
| Signing & Pavement Markings | Pavement Marking Quantities (see supplemental 11/30/12) |
07/20/2006 |
| Surfacing & Typical Sections | Revised Surfacing Structural Coefficients and Layer Thicknesses | 05/11/2006 |
| Curbs, Ramps, and Sidewalk | Median Concrete Curb - Type B | 04/18/2006 |
| Fencing & Right-of-Way | MDT Fencing Policy and Procedure (Non-Interstate) | 04/10/2006 |
| Plans Preparation | Summary Subtotals | 04/06/2006 |
| Signing & Pavement Markings | Temporary Pavement Markings | 03/23/2006 |
| Surfacing & Typical Sections | 1/2 in (12.5 mm) Plant Mix Surfacing | 01/04/2006 |
| Surfacing & Typical Sections | Isolation Lifts | 12/14/2005 |
| Plans Preparation | Quantity Splits Reference Guide for Designers | 11/04/2005 |
| Plans Preparation | Quantity Splits (see supplemental 11/04/05) |
10/14/2005 |
| Fencing & Right-of-Way | Retracement Surveys - a guideline for RW Plans | 08/11/2005 |
| Surfacing & Typical Sections | Isolation Lifts and Tack (see supplemental 12/14/05) |
06/29/2005 |
| Hydraulics | Guidelines for Hydraulic Report Data as Requested by the DFWP | 05/18/2005 |
| Surfacing & Typical Sections | Surfacing Design Guidelines | 04/07/2005 |
| Hydraulics | Hydraulic Reports | 04/05/2005 |
| Fencing & Right-of-Way | Access to Bridges | 02/14/2005 |
| Plans Preparation | Title Sheet - Design Data | 01/07/2005 |
| Roadside Barrier | W-Beam Guardrail Reassessment of the BCT | 07/12/2004 |
| Surfacing & Typical Sections | Cover Material Revision and Asphalt Cement Quantities | 06/29/2004 |
| Rumble Strips | Rumble Strip Policy Revision (see revision 11/30/12) |
06/29/2004 |
| Hydraulics | DEQ Storm Drain/Water Main Requirements | 06/15/2004 |
| Surfacing & Typical Sections | Widening Projects - Vertical Notch | 04/12/2004 |
| Hydraulics | Water Resources Investigations Report 03-4308: USGS - Methods for Estimating Flood Frequency in Montana Based on Data through Water Year 1998 | 03/29/2004 |
| Signing & Pavement Markings | Temporary Pavement Markings | 01/16/2004 |
| Bridge | Salvaged Bridge Material | 09/30/2003 |
| Hydraulics | Pipe Cleaning | 09/05/2003 |
| Bridge | Vertical Clearance Railroad Separations | 06/19/2003 |
| Fencing & Right-of-Way | R/W Bureau Red Line Process | 12/05/2002 |
| Bridge | Structure Excavation on End Bents as a Pay Item | 10/03/2000 |
