Chapter 1 - General Design Requirements Chapter 2 - Erosion Control, Clearing and Grading Chapter 3 - Streets  Chapter 4 - Storm Drainage Chapter 5 - Water Chapter 6 - Wastewater Appendix A - Procedure for Permit Projects by Private Contract Appendix B - Longview - Kelso Urban Area Access Management for Roads and Streets Appendix C - Table 4.1 - Summary of Most Common State Flow and Quality Control Credits in Ecology's SMMWW Appendix D - Local and State Requirements Flowcharts Appendix E - Design Storm Data Appendix F - Common Onsite Runoff Management BMPs Appendix G - Open Pit Falling Head Infiltration Test Appendix H - Sample Covenant Language

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Chapter 1 - General Design Requirements	Top
1.00 Requirements for Public Improvements	1
1.01 Precedence of Documents	1
1.02 Abbreviations and Definitions	2
1.03 Permits	7
1.04 Submittal Requirements	8
1.05 Professional Qualifications	39
1.06 Changes to these Engineering Standards	39
1.07 Design Modification Process	39
1.08 Securities	40
1.09 Errors and Omissions	40
1.10 Inspection	40
1.11 Contractor's Responsibility for Scheduling	42
1.12 Contractor's Requirements for Testing	43
1.13 Safety Requirements	44
1.14 Preservation, Restoration, and Cleanup	44
1.15 Railroad Crossing	46
1.16 Penalties	46
Chapter 2 - Erosion Control, Clearing, and Grading	Top
2.00 Purpose & Objective	1
2.01 Applicability	2
2.02 General Requirements	4
2.03 Seasonal Work Limitations	5
2.04 Twelve Elements of Construction Erosion and Sediment Control	6
2.05 Erosivity Waiver	13
2.06 Underground Utility Construction	13
2.07 Historical and Archaeological Areas	14
2.08 Other Requirements	14
2.09 Standard Notes for Erosion Control Plans	14
2.10 Signage	16
2.11 Common Erosion and Sediment Control BMPs	16
Figure 2-1: Erosion Control Signage	16
Chapter 3 - Streets	Top
3.00 Functional Classification	1
3.01 Access	2
3.02 Intersections, Driveways and Approaches	4
3.03 Street Widths	11
3.04 Surfacing Requirements	17
3.05 Design Speed	18
3.06 Horizontal Alignment	19
3.07 Vertical Alignment	19
3.08 Transitions	20
3.09 Dedications and Guarantees	21
3.10 Private Streets	22
3.11 Street Frontage Improvements	26
3.12 Street Ends	29
3.13 Medians	32
3.14 Sight Obstruction Requirements	32
3.15 Survey Monuments	33
3.16 Sidewalks	33
3.17 Multi-Use Traits	34
3.18 Bridges	34
3.19 Landscaping in the Right-of-Way, Easements, and Access Tracts	35
3.20 Street Illumination	37
3.21 Traffic Control and Signing	38
3.22 Appurtenances	39
3.23 Franchise Utilities	39
3.24 Trench Backfill and Restoration	40
3.25 Speed Humps	40
Figures	Top
Figure 3-1: Corner Lot Setback	7
Figure 3-2: Major Arterial	11
Figure 3-3: Minor Arterial	12
Figure 3-3a: Industrial Minor Arterial	12
Figure 3-4: Collector	13
Figure 3-4a: Industrial Collector	13
Figure 3-4b: Industrial Collector w/Ditch	14
Figure 3-5: Local: Multi-Family Area	14
Figure 3-6: Local: Single-Family Area	15
Figure 3-6a: Roadway with Rain Gardens	16
Figure 3-7: Alley: Commercial & Industrial	16
Figure 3-8: Alley: Residential	17
Figure 3-9: Private Street Type I	24
Figure 3-10: Private Street Type II	24
Figure 3-11: Private Street Type III	25
Figure 3-12: Minimum Street Improvement	28
Figure 3-13: Cul-De-Sac Dimensions	30
Figure 3-14: Temporary Cul-De-Sac	31
Figure 3-15: Trench Patch	40
Tables	Top
Table 3.1 - Unsignalized Intersection Spacing	6
Table 3.2 - Minimum Distances from Corner Standards	7
Table 3.3 - Curb Return Radii (Feet) Edge of Pavement/Curb-Minimums	10
Table 3.4 - Major Arterial Surfacing Requirements	17
Table 3.5 - Minor Arterial Surfacing Requirements	18
Table 3.6 - Collector Street Surfacing Requirements	18
Table 3.7 - Local Street and Alley Access Surfacing Requirements	18
Table 3.8 - Vertical Alignments and Flood Plains	20
Table 3.9 - Landscaping in the Right-of-Way, Easement, and Access Tracts	35
Chapter 4 - Storm Draining	Top
4.00 Purpose	1
4.01 General	1
4.02 Scope	2
4.03 Exemptions and Variations	3
4.04 Overview of Development Requirements	6
4.05 Local Requirements for Development and Redevelopment	6
4.06 State Requirements for Development and Redevelopment	14
4.07 Local Impact Development	15
4.08 Standards for Dispersion and Infiltration	16
4.09 Local Credits	17
4.10 State Credits	19
4.11 Simplified Infiltration Test	20
4.12 General Conveyance Requirements	20
4.13 Closed Conduit Systems	20
4.14 Open Conveyance	24
4.15 Private Drainage	24
4.16 Subsurface Drainage	25
4.17 Curb Cuts	25
4.18 Tracts and Easements	26
4.19 Stormwater Performance Bond	26
4.20 As-Built Plans	27
4.21 Dedication of Facilities	27
4.22 Long-Term Operation and Maintenance	28
4.23 Enforcement	30
Chapter 5 - Water	Top
5.00 Utility Easements and Tracts	1
5.01 General Design Considerations	1
5.02 Sizing and Pressure Requirements	3
5.03 Shut-off Valves	4
5.04 Air-Release Valves	4
5.05 Hydrants	4
5.06 Water Metres	4
5.07 Fees and Charges	6
5.08 Cross Connection Control	6
5.09 Contract for Reimbursement (Latecomer Agreements)	6
5.10 Water Quality	6
5.11 Plans and Specifications	6
5.12 Connections to Existing Pipelines	7
5.13 Roadway and Railway Crossing	7
5.14 Trench Excavation	8
5.15 Pipe in Filled Areas	8
5.16 Pipe Installation for Water Mains	8
5.17 Bedding and Backfill	9
5.18 Hydrostatic Tes	9
5.19 Sterilization and Flushing of Water Mains	10
5.20 Cross Connection Control and Backflow Assemblies	10
5.21 Requirements for Water System Vault Installations	12
5.22 Fire Services and Domestic Services	13
5.23 Special for Fire Service Only	13
5.24 Water Meter Vaults	14
5.25 Pressure Reducing Valve Vaults	14
5.26 Appurtenances	14
Tables	Top
Table 5.1 - Maximum Deflection Permitted 18-Foot Length Rope	9
Chapter 6 - Wastewater	Top
6.00 Extension of the Sewer System and Service	1
6.01 Plans and Specifications	5
6.02 Connections to Existing Systems	5
6.03 Roadway and Railway Crossing	6
6.04 Trench Excavation	6
6.05 Pipe Laying	6
6.06 Pipe Bedding	6
6.07 Pipe Backfilling	6
6.08 Pipe in Filled Areas	7
6.09 Cleaning and Flushing	7
6.10 Testing of Gravity Sewers	7
6.11 Testing of Manholes	7
6.12 Television Inspection	7
6.13 Testing of Pressure Sewer Mains	7
6.14 Manholes	8
6.15 Side Sewers	9
6.16 Pump Stations	10
6.17 Mechanical Lifting Devices	11
6.18 Pretreatment Facilities	12
Figures
Figure 6-1: Manhole Sizing

Appendix A - Procedure for Permit Projects by Private Contract	Top
Appendix B - Longview-Kelso Urban Area Access Management for Roads and Streets
Appendix C - Table 4.1 - Summary of Most Common State Flow and Quality Control Credits in Ecology's SMMWW
Appendix D - Local and State Requirements Flowcharts
Appendix E - Design Storm Data
Appendix F - Common Onsite Runoff Management BMPs
Appendix G - Open Pit Fallling Head Infiltration Test
Appenidix H - Sample Covenant Language

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