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Kelso General Sewer and Facilities Plan

Sections 1 and 2
- 1 - Summary and Recommendations
- 2 - Purpose and Approach
Section 3 Pages 1-15
Section 3 Pages 16-32
- 3 - Conditions in the Planning Area
Sections 4, 5, 6, 7, 8, and 9
- 4 - Description of Existing Wastewater Treatment Plant
- 5 - Existing and Future Wasteloads
- 6 - Effluent Limitations, Water Quality Management Goals and End-Use Requirements
- 7 - Collection System Evaluation
- 8 - Financial Considerations
- 9 - Implementation Schedule
Appendices A, B, C, D, E, and F
- A - TRRWP NPDES Permit and Fact Sheet
- B - 2005 Revised and Restated Interlocal Agreement
- C - Discussion of Projected Flows and Loading for the Three Rivers Plant
- D - Sewer Trunk Inventory
- E - Flow Projections
- F - Sewer Rate Ordinance
Appendix G
- G - Sewer Inventory (map pocket)
Appendices H, I, J, and K
- H - SEPA Documentation and DNS
- I - Environmental Report (Bound Separately)
- J - ESA Compliance
- K - Agency review Comments and Response

*Table of Contents*
SECTION I - SUMMARY AND RECOMMENDATIONS			I-1
	PURPOSE OF THIS GENERAL SEWER AND FACILITIES PLAN		I-1
	FUNDING RECOMMENDATIONS		I-1
	SUMMARY OF GSP/FP		I-2
	COLLECTION SYSTEM IMPROVEMENTS		I-5
	I/I REDUCTION PROGRAM		I-5
SECTION II - PURPOSE AND APPROACH			II-1
	PROJECT PURPOSE		II-1
	APPROACH		II-1
SECTION III - CONDITIONS IN THE PLANNING AREA			III-1
	INTRODUCTION		III-1
	KELSO SEWER SERVICE AREA		III-3
	PAST PLANNING EFFORTS		III-5
	ECONOMY		III-5
	LAND-USE		III-7
	OTHER SERVICES		III-9
	PHYSICAL CONDITIONS		III-9
		Topography	III-9
		Soils	III-9
		Climate	III-13
		Air Quality	III-13
		Surface Waters	III-13
		Flood Plains	III-16
		Groundwater / Regional Geology	III-18
		Wetlands and Shorelines	III-21
	FISH AND WILDLIFE, THREATENED AND ENDANGERED SPECIES		III-21
	HISTORICAL AND CULTURAL RESOURCES		III-25
	ADJACENT WASTEWATER FACILITIES		III-26
	EXISTING WATER SYSTEM		III-26
	WATER CONSERVATION		III-27
	WATER USE EFFICIENCY PROGRAM		III-27
SECTION IV - DESCRIPTION OF EXISTING WASTEWATER TREATMENT PLANT			IV-1
	INTRODUCTION		IV-1
	DESCRIPTION OF EXISTING PHYSICAL PLANT		IV-1
	TRRWP EFFLUENT		IV-4
SECTION V - EXISTING AND FUTURE WASTELOADS			V-1
	INTRODUCTION		V-1
	POPULATION PROJECTION		V-1
	FLOW		V-1
	INDUSTRIAL/COMMERCIAL SEWER USERS		V-2
	CBOD5 AND TSS LOADING		V-4
SECTION VI - EFFLUENT LIMITATIONS, WATER QUALITY MANAGEMENT GOALS AND END-USE REQUIREMENTS			VI-1
	INTRODUCTION		VI-1
		Description of Water Bodies	VI-1
		Description of Applicable Wastewater Treatment Facilities and NPDES Permits	VI-1
	WATER QUALITY CONCERNS AND APPLICABLE REGULATORY STANDARDS		VI-3
		General Discussion of Mixing Zones and Critical Conditions	VI-3
		Flow and Loading Projections	VI-4
SECTION VII - COLLECTION SYSTEM EVALUATION			VII-1
	INTRODUCTION		VII-1
	DESCRIPTION OF EXISTING COLLECTION SYSTEM		VII-1
	FLOW MONITORING PROGRAM		VII-2
	1997 GENERAL SEWER PLAN FOR LONGVIEW-KELSO AREA		VII-3
	COLLECTION SYSTEM IMPROVEMENTS SINCE 1993		VII-6
	SANITARY SEWER FLOW MODELING		VII-10
	FUTURE FLOWS		VII-13
	FUTURE COLLECTION SYSTEM EXTENSIONS		VII-14
	COLLECTION SYSTEM EVALUATION		VII-20
	RECOMMENDED GRAVITY SEWER IMPROVEMENTS		VII-26
	PUMP STATION DESCRIPTIONS AND EVALUATIONS		VII-31
	RECOMMENDED PUMP STATION IMPROVEMENTS		VII-42
	INFILTRATION & INFLOW REDUCTION PROGRAM		VII-47
	INTRODUCTION AND PURPOSE		VII-47
	SOURCES OF INFLOW AND INFILTRATION		VII-48
	SIDE SEWER TESTING AND REHABILITATION		VII-50
	SEWER LINE REPLACEMENT COSTS		VII-53
	ESTIMATED I/I REMOVAL		VII-53
	RECOMMENDED I&I REDUCTION WORK FOR KELSO		VII-54
	COLLECTION SYSTEM IMPROVEMENTS SUMMARY		VII-56
SECTION VIII - FINANCIAL CONSIDERATIONS			VIII-1
	INTRODUCTION		VIII-1
	DEPARTMENT OF ECOLOGY FUNDING PROGRAMS		VIII-1
	DEPARTMENT OF ECOLOGY- CENTENNIAL FUND		VIII-3
	COMMUNITY ECONOMIC REVITALIZATION BOARD (CERB)		VIII-3
	COMMUNITY DEVELOPMENT BLOCK GRANT (CDBG)		VIII-4
	COWLITZ COUNTY ECONOMIC DEVELOPMENT 09 GRANT		VIII-4
	CITY WIDE ULID		VIII-5
	SEWER RATES		VIII-5
	SEWER CAPITAL IMPROVEMENT FUND		VIII-6
	REVENUE BONDS		VIII-6
	PUBLIC WORKS TRUST FUND		VIII-6
	DEPARTMENT OF ECOLOGY BASE REVOLVING FUND (BRF)		VIII-8
	WASTEWATER COLLECTION AND TREATMENT SYSTEM O&M COSTS		VIII-8
	POTENTIAL FUNDING SCENARIOS		VIII-9
	SUMMARY AND RECOMMENDATIONS		VIII-12
SECTION IX - IMPLEMENTATION SCHEDULE			IX-1

*Appendices*
Appendix A – TRRWP NPDES Permit and Fact Sheet
Appendix B – 2005 Revised and Restated Interlocal Agreement
Appendix C – Discussion of Projected Flows and Loading for the Three Rivers Plant
Appendix D – Sewer Trunk Inventory
Appendix E – Flow Projections
Appendix F – Sewer Rate Ordinance
Appendix G – Sewer Inventory (map pocket)
Appendix H – SEPA Documentation and DNS
Appendix I – Environmental Report (Bound Separately)
Appendix J – ESA Compliance
Appendix K – Agency Review Comments and Response

Sewer Master Plan

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City of Kelso 360.423.1371
203 South Pacific, Kelso, WA 98626

Sewer Master Plan
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