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Sussex County Council

Sussex County Council. A Regional Planning Report to Assess a Joint Sussex County/City of Rehoboth Land Application Project. August 18, 2009. Design Criteria. Planning Period: Year 2009  2030 West Rehoboth Expansion Flows: 4.4 million gallons per day (mgd) (1.)

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Sussex County Council

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  1. Sussex County Council A Regional Planning Report to Assess a Joint Sussex County/City of Rehoboth Land Application Project August 18, 2009

  2. Design Criteria Planning Period: Year 2009 2030 West Rehoboth Expansion Flows: 4.4 million gallons per day (mgd) (1.) Inland Bays Service Area Flows: 2.9 mgd Rehoboth Beach Flows: 2.5 mgd (2.) Total Treatment and Disposal Capacity Required: 9.8 mgd Note: (1.) All flows are maximum month average daily flows. (2.) Rehoboth Beach Flows include Dewey Beach, Henlopen Acres & North Shores.

  3. North Coastal Planning AreaTreatment and Disposal Alternatives Wolfe Neck Regional Wastewater Facility Northern West Rehoboth 15 miles Henlopen Acres/North Shores West Rehoboth Expansion Dewey Beach SSD • Wolfe Neck Regional Wastewater Treatment Facility (WNRWF) 3.5 miles Goslee Creek Planning Area Rehoboth Beach 3 miles • Inland Bays Regional Wastewater Treatment Facility (IBRWF) Angola Neck Planning Area Rehoboth Beach WWTP 13 miles • City of Rehoboth Beach Wastewater Treatment Plant (RBWWTP) Dewey Beach Herring Creek Planning Area Inland Bays Regional Wastewater Facility Long Neck SSD Exp. Area 1 Oak Orchard SSD Exp. Area 2

  4. Alternative #1A- Raw Wastewater to WNRWF with Treatment at the IBRWF WNRWF Capacity Available= 2.3 MGD IBRWF Capacity Required= 7.5 MGD 2.5 MGD (Raw WW) 4.4 MGD Wolfe Neck Service Area City of Rehoboth Includes: West Rehoboth Goslee Creek Northern WR Exp Includes: City of Rehoboth Henlopen Acres Dewey Beach North Shores 4.6 MGD (Excess) Includes: Long Neck SSD Oak Orchard SSD OO Exp #1 Angola Neck SSD 2.9 MGD Inland Bays Service Area Note: All flow rates refer to year 2030 Max Month treatment and disposal requirements.

  5. Alternative #1B- Raw Wastewater to WNRWF with Treatment at a Private Provider WNRWF Capacity Available= 2.3 MGD IBRWF Capacity Required= 2.9 MGD Private WW Provider Capacity Required= 4.6 MGD 2.5 MGD (Raw WW) 4.4 MGD Wolfe Neck Service Area City of Rehoboth Includes: West Rehoboth Goslee Creek Northern WR Exp Includes: City of Rehoboth Henlopen Acres Dewey Beach North Shores 4.6 MGD (Excess) Includes: Long Neck SSD Oak Orchard SSD OO Exp #1 Angola Neck SSD 2.9 MGD Inland Bays Service Area Note: All flow rates refer to year 2030 Max Month treatment and disposal requirements.

  6. Alternative #2A- Treated Effluent to WNRWF with Treatment at the IBRWF IBRWF Capacity Required= 6.5 MGD 2.5 MGD (Raw WW) WNRWF Capacity Available= 3.1 MGD Storage Available for Max Month= 0.2 MGD 4.4 MGD Wolfe Neck Service Area City of Rehoboth Includes: West Rehoboth Goslee Creek Northern WR Exp Includes: City of Rehoboth Henlopen Acres Dewey Beach North Shores 3.6 MGD (Excess) Includes: Long Neck SSD Oak Orchard SSD OO Exp #1 Angola Neck SSD 2.9 MGD Inland Bays Service Area Note: All flow rates refer to year 2030 Max Month treatment and disposal requirements.

  7. Alternative #2B- Treated Effluent to WNRWF with Treatment at a Private Service Provider IBRWF Capacity Required= 2.9 MGD Private WW Provider Capacity Required= 3.6 MGD 2.5 MGD (Raw WW) WNRWF Capacity Available= 3.1 MGD Storage Available for Max Month= 0.2 MGD 4.4 MGD Wolfe Neck Service Area City of Rehoboth Includes: West Rehoboth Goslee Creek Northern WR Exp Includes: City of Rehoboth Henlopen Acres Dewey Beach North Shores 3.6 MGD (Excess) Includes: Long Neck SSD Oak Orchard SSD OO Exp #1 Angola Neck SSD 2.9 MGD Inland Bays Service Area Note: All flow rates refer to year 2030 Max Month treatment and disposal requirements.

  8. Alternative #3- Separate Treatment and Disposal IBRWF Capacity Required= 5.0 MGD WNRWF Capacity Available= 2.3 MGD 4.4 MGD Wolfe Neck Service Area City of Rehoboth Includes: West Rehoboth Goslee Creek Northern WR Exp Includes: City of Rehoboth Henlopen Acres Dewey Beach North Shores 2.5 MGD (Treated WW) 2.1 MGD (Excess) Ocean Outfall Includes: Long Neck SSD Oak Orchard SSD OO Exp #1 Angola Neck SSD 2.9 MGD Inland Bays Service Area Note: All flow rates refer to year 2030 Max Month treatment and disposal requirements.

  9. Summary of Costs

  10. Preliminary User Rates

  11. Sussex County Council City of Rehoboth Beach Comments

  12. Sussex County Council Questions? August 18, 2009

  13. Sussex County Council Where do we go from here? August 18, 2009

  14. Alternative #4- Combined Ocean Outfall IBRWF Capacity Required= 2.9 MGD (Not part of August 2009 County/Rehoboth Study. Slide inserted for informational purposes for August 18, 2009 presentation to Sussex County Council. Slide was part of presentation to Sussex County Council in June 2008) WNRWF Treatment and Disposal Capacity Available= 2.3 MGD Upgrades for Additional Treatment to 4.4 MGD 4.4 MGD Wolfe Neck Service Area City of Rehoboth 2.5 MGD (Treated WW) Includes: West Rehoboth Goslee Creek Northern WR Exp Includes: City of Rehoboth Henlopen Acres Dewey Beach Ocean Outfall 2.1 MGD (Excess Treated WW) Total Cost: $92 M County Cost $75 M Rehoboth Cost: $17 M Rehoboth Rates: $400-500 Includes: Long Neck SSD Oak Orchard SSD OO Exp #1 Angola Neck SSD 2.9 MGD Inland Bays Service Area Note: All flow rates refer to year 2030 Max Month treatment and disposal requirements.

  15. Previous County Council Motions (Not part of August 2009 County/Rehoboth Study. Slide inserted for informational purposes for August 18, 2009 presentation to Sussex County Council. Alternative #3 of June 3, 2008 does not refer to Alternative #3 of August 2009 Joint Study. Italics emphasis added.) County Council Motion, June 3, 2008 A Motion was made by Mr. Dukes, seconded by Mr. Phillips, to support spray irrigation (Alternative No. 3 – Joint Sussex County/Rehoboth Spray Irrigation). Motion Adopted: 4 Yeas, 1 Nay. County Council Motion, December 16, 2008 A Motion was made by Mr. Dukes, seconded by Mr. Phillips, to authorize County staff to issue an RFP (for cost alternatives for wastewater treatment and disposal services for the Wolfe Neck Treatment Facility and City of Rehoboth). Motion Adopted: 4 Yeas, 1 Nay.

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