Road Design and Construction Standards

The Road Design and Construction Standards establish the technical engineering design and construction requirements for public road and bridge improvements under our jurisdiction. Our road design and construction standards:

Provide a safe and reliable transportation system
Preserve, protect and improve County infrastructure
Ensure the long-term viability of the transportation system
Avoid unneeded maintenance and replacement costs.

These regulatory documents help create communities where transportation needs and livability are well balanced.

Document Downloads

Document	Effective Date	Description
Road Design and Construction Standards - Ordinance (PDF 824.78 KB)	3/18/2011	Ordinance 738 Text with Exhibits excluding Appendices and Details
Errata Document (PDF 8.83 KB)		Updated June 15, 2011
Appendix A (PDF 997.73 KB)	11/21/2012	Arterial Roads Map of Eastern Washington Co.
Appendix B (PDF 487.19 KB)	11/21/2012	PDF, Arterial Roads Map of All Washington Co.
Appendix C (PDF 1006.33 KB)	11/21/2012	Collector Roads Map of Eastern Washington Co.
Appendix D (PDF 495.08 KB)	11/21/2012	Collector Roads Map of All Washington Co.
Appendix E (PDF 1.14 MB)	1/12/2024	Road Eng. Plan Submittal/Review Checklist
Appendix F (PDF 65.66 KB)	5/7/2020	Road Design Exception Form
Appendix G (PDF 196.57 KB)	5/10/2023	Road Right-Of-Way Plant List
Appendix H (PDF 841.15 KB)	11/21/2012	Approval Process for New Pedestrian Crossings at Mid-Block Intersections
Crosswalk Accessibility Requirements and Closure (PDF 115.24 KB)	10/30/2017	Memorandum: Crosswalk Accessibility Requirements and Closure Process
Facility Permit Submittal Requirements (PDF 180.03 KB)	4/29/2020	Memorandum: Facility Permit Submittal Requirements
Revised Pedestrian Crossing Analysis for Local and Neighborhood Routes (PDF 256.82 KB)	7/24/2019	Memorandum: Revised Pedestrian Crossing Analysis for Local and Neighborhood Routes
Sight Distance Guidelines (PDF 156.43 KB)	4/8/2021	Memorandum: Sight Distance Guidelines
Terminus Guidance or Public Roads (PDF 150.85 KB)	1/5/2021	Memorandum: Terminus Guidance for Public Roads
Channelized Right Turn Lanes on County Roadways (PDF 707.77 KB)	9/22/2021	Memorandum: Channelized Right Turn Lanes on County Roadways
Clarification of Americans with Disabilities Act (ADA) Design Standards (PDF 136.54 KB)	6/1/2022	Memorandum: Clarification of Americans with Disabilities Act (ADA) Design Standards
Clear Zone Guidance for Utility Poles (PDF 122.93 KB)	3/7/2023	Memorandum: Clear Zone Guidance for Utility Poles
Digital Signatures for Plan Submittals (PDF 1.55 MB)	3/22/2023	Memorandum: Digital Signatures for Plan Submittals

ADA Ramp Inspection Forms

Document	Effective Date	Description
Inspection form 7010 (PDF 1.41 MB)	9/16/2020	Perpendicular ramps
Inspection Form 7020 (PDF 578.53 KB)	4/29/2020	Parallel ramps
Inspection Form 7030 (PDF 1.3 MB)	4/29/2020	Combination ramps
Inspection Form 7040 (PDF 501.4 KB)	4/29/2020	Blended-transition ramps
Inspection Form 7050 (PDF 524.97 KB)	4/29/2020	Cut-through ramps
Inspection Form 7060 (PDF 533.16 KB)	4/29/2020	End-of-walk ramps
Inspection Form 7070 (PDF 524.35 KB)	4/29/2020	Unique ramps
Inspection Form 7080 (PDF 460.22 KB)	4/29/2020	ADA Push Buttons (Turn spaces and paved shoulders)
Inspection Form 7090 (PDF 352.86 KB)	4/29/2020	ADA Push Buttons (Ramp runs and back-in maneuvers)

Traffic Signal Inspection Forms

Document	Effective Date	Description
Inspection form 6910 (PDF 293.41 KB)	6/1/2022	Field verification of signal pole
Inspection form 6920 (PDF 317.4 KB)	6/1/2022	Field verification of signal pole foundation

Standard Details

Document	Effective Date	PDF	DWG
1000 - Driveways
1010 - Driveway and Driveway Approach Pavement Section	6/1/2022	1010.pdf (PDF 309.15 KB)	1010.dwg
1020 - Residential Driveway Approach (w/ planter strip)	6/1/2022	1020.pdf (PDF 311.41 KB)	1020.dwg
1030 - Residential Driveway Approach (Curbtight Sidewalk)	7/1/2024	1030.pdf (PDF 92.22 KB)	1030.dwg
1040 - Commercial Driveway Approach (with Planter Strip)	6/1/2022	1040.pdf (PDF 288.67 KB)	1040.dwg
1050 - Commercial Driveway Approach (Curbtight Sidewalk)	7/1/2024	1050.pdf (PDF 108.63 KB)	1050.dwg
1070 - Private Road Entrance Off Of Public Roads With Curbs	8/1/2018	1070.pdf (PDF 151.85 KB)	1070.dwg
1080 - Driveway for Uncurbed Roads, Plan and Profile	8/1/2018	1080.pdf (PDF 177.19 KB)	1080.dwg
1081 - Driveway for Uncurbed Roads, Cross-Section and Profiles	8/1/2018	1081.pdf (PDF 242.04 KB)	1081.dwg
1082 - Culvert Tables	3/31/2016	1082.pdf (PDF 56.81 KB)	1082.dwg
1090 - Access Along Unimproved Frontage	3/18/2011	1090.pdf (PDF 74.39 KB)	1090.dwg
2000 - Curbs and Sidewalks
2010 - Standard Curb And Gutter	6/1/2022	2010.pdf (PDF 362.64 KB)	2010.dwg
2020 - Modified Curb Details	6/1/2022	2020.pdf (PDF 318.58 KB)	2020.dwg
2030 - Vertical Curb And Gutter Non-Mountable	6/1/2022	2030.pdf (PDF 363.75 KB)	2030.dwg
2040 - Curb Type Transition Detail	6/1/2022	2040.pdf (PDF 163.57 KB)	2040.dwg
2050 - Catch Basin Pavement Tapers	3/18/2011	2050.pdf (PDF 57.6 KB)	2050.dwg
2110 - P.C. Concrete Sidewalk Detail	7/1/2024	2110.pdf (PDF 85.66 KB)	2110.dwg
2111 - Monolithic Sidewalk With Wall Detail	6/1/2022	2111.pdf (PDF 345.82 KB)	2111.dwg
2120 - Typical Sidewalk Obstruction Swing-Away Apron	3/18/2011	2120.pdf (PDF 119.01 KB)	2120.dwg
2130 - Sidewalk Curb Ramp At Curb Return	6/1/2022	2130.pdf (PDF 784.15 KB)	2130.dwg
2140 - End of Sidewalk Transition Detail	7/1/2024	2140.pdf (PDF 78.07 KB)	2140.dwg
2150 - Pedestrian Path Or Bikeway	9/1/2019	2150.pdf (PDF 25.32 KB)	2150.dwg
2210 - Standard Cul-De-Sac	8/1/2018	2210.pdf (PDF 92.22 KB)	2210.dwg
2220 - Eyebrow - Corner	3/8/2011	2220.pdf (PDF 70.28 KB)	2220.dwg
2230 - Curb Extension	3/8/2011	2230.pdf (PDF 142.53 KB)	2230.dwg
2300 - Traffic Separator	6/1/2023	2300.pdf (PDF 102.12 KB)	2300.dwg
2315 - Raised Median Nose Treatment	7/1/2024	2315.pdf (PDF 70.84 KB)	2315.dwg
3000 - General
3010 - Centerline Survey Monument Detail	7/01/2017	3010.pdf (PDF 82.15 KB)	3010.dwg
3020 - Pipe Bedding And Backfill Details	7/1/2024	3020.pdf (PDF 81.98 KB)	3020.dwg
3030 - Offset Crown	3/18/2011	3030.pdf (PDF 101.77 KB)	3030.dwg
3040 - Utility Location	3/18/2011	3040.pdf (PDF 198.48 KB)	3040.dwg
3050 - Local Road Utility Easement	3/18/2011	3050.pdf (PDF 60.93 KB)	3050.dwg
3060 - Mailbox Installation Plan	1/1/2017	3060.pdf (PDF 49.71 KB)	3060.dwg
3070 - Vehicle Barrier Post	3/18/2011	3070.pdf (PDF 132.99 KB)	3070.dwg
3080 - Temporary Steel Plates	7/1/2024	3080.pdf (PDF 577.08 KB)	3080.dwg
4000 - Landscape
4010 - Root Barrier Detail	6/1/2023	4010.pdf (PDF 90.4 KB)	4010.dwg
5000 - Drainage
5010 - Subsurface Drain Detail	3/18/2011	5010.pdf (PDF 192.63 KB)	5010.dwg
5020 - Subgrade And Spring Catchment Detail	3/18/2011	5020.pdf (PDF 156.58 KB)	5020.dwg
5030 - Rain Garden	3/18/2011	5030.pdf (PDF 84.42 KB)	5030.dwg
5031 - Rain Garden Details	3/18/2011	5031.pdf (PDF 75.42 KB)	5031.dwg
6000 - Traffic
6010 - Street Barricade Type III, Steel Posts End Of Road	7/1/2024	6010.pdf (PDF 85.46 KB)	6010.dwg
6020 - Street Barricade Type III, Steel Posts Right Of Traffic	7/1/2024	6020.pdf (PDF 156.24 KB)	6020.dwg
6030 - Sidewalk Barricade Type III, Steel Posts	7/1/2024	6030.pdf (PDF 89.19 KB)	6030.dwg
6035 - Fire Access Detail	6/1/2023	6035.pdf (PDF 111.35 KB)	6035.dwg
6040 - Tubular Marker	7/1/2024	6040.pdf (PDF 86.59 KB)	6040.dwg
6050 - Sign Post Installation In P.C. Concrete Or Asphalt	7/1/2024	6050.pdf (PDF 84.66 KB)	6050.dwg
6052 - Typical Sign Post Installation in Native Soil	7/1/2024	6052.pdf (PDF 77.51 KB)	6052.dwg
6062 - Speed Cushion Curbed or Uncurbed Roadway Speed 25 MPH or Less	7/1/2024	6062.pdf (PDF 280.15 KB)	6062.dwg
6110 - Striping Legend	7/1/2024	6110.pdf (PDF 237.31 KB)	6110.dwg
6510 - Permanent Signing Legend	6/1/2023	6510.pdf (PDF 404.21 KB)	6510.dwg
6511 - Street Name Signs	7/1/2024	6511.pdf (PDF 593.43 KB)	6511.dwg
6512 - No Parking And Speed Signs	6/1/2023	6512.pdf (PDF 324.46 KB)	6512.dwg
6520 - Future Development Sign	3/18/2011	6520.pdf (PDF 174.42 KB)	6520.dwg
6521 - Private Road Sign	3/18/2011	6521.pdf (PDF 58.75 KB)	6521.dwg
6522 - Next Signal Sign (Stand-Alone)	7/1/2024	Next Signal Sign (Stand-Alone) 6522 (PDF 168.25 KB)	6522.dwg
6597 - Geogrid Location Sign	9/1/2019	6597.pdf (PDF 52.1 KB)	6597.dwg
6598 - Culvert Number Sign	8/12/2015	6598.pdf (PDF 62.08 KB)	6598.dwg
6599 - Bridge Number Sign	3/18/2011	6599.pdf (PDF 62.37 KB)	6599.dwg
6800 - Solar Vehicle Speed Sign Pedestal	6/1/2023	6800.pdf (PDF 73.63 KB)	6800.dwg
6801 - Pedestrian Rectangular Rapid Flashing Beacon Details	6/1/2023	6801.pdf (PDF 104.27 KB)	6801.dwg
6810 - Luminaire Supports-Davit Style 25', 30' and 35' Mounting Heights	6/1/2022	6810.pdf (PDF 707.7 KB)	6810.dwg
6820 - Typical Foundation For Luminaire Supports and Typical Luminaire Details	7/1/2024	6820.pdf (PDF 107.18 KB)	6820.dwg
6831 - Traffic Engineering Junction Box Details	7/1/2024	6831.pdf (PDF 112.42 KB)	6831.dwg
6833 - Unmetered Service Cabinet Details	7/1/2024	6833.pdf (PDF 74.54 KB)	6833.dwg
6911 - Traffic Signal Supports Notes And Design Criteria	6/16/2014	6911.pdf (PDF 495.05 KB)	6911.dwg
6912 - Traffic Signal Supports General Details	4/11/2016	6912.pdf (PDF 470.5 KB)	6912.dwg
6913 - Traffic Signal Supports Steel Details	6/16/2014	6913.pdf (PDF 350.05 KB)	6913.dwg
6921 - Traffic Signal Supports Foundation Standard (Square)	9/1/2019	6921.pdf (PDF 126.46 KB)	6921.dwg
6922 - Traffic Signal Supports Foundation Standard (Round)	9/1/2019	6922.pdf (PDF 133.9 KB)	6922.dwg

Plan set files

The following files are for the production of project plan sets associated with Washington County projects only.

Washington County Plan Title Sheet	CAD files for use as templates in production of plan sets
Washington County Plan Borders	CAD files for use as borders in production of plan sets
Washington County Utility Line Styles	CAD and LIN files for use in existing utility drawings

Document Downloads

ADA Ramp Inspection Forms

Traffic Signal Inspection Forms

Standard Details

1000 - Driveways

2000 - Curbs and Sidewalks

3000 - General

4000 - Landscape

5000 - Drainage

6000 - Traffic

Plan set files