Pud no 1 of clallam county in association with clallam county
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PUD No. 1 of Clallam County In Association with Clallam County PowerPoint PPT Presentation


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PUD No. 1 of Clallam County In Association with Clallam County. Sewer Facilities Plan for Carlsborg UGA. PRE – DRAFT June 2009. Proposed Land Use. 1. Sewer System for Entire UGA. 2. Initial Sewer Facilities. 3. Projected Wastewater Flows In gallons per day. 4.

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PUD No. 1 of Clallam County In Association with Clallam County

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PUD No. 1 of Clallam CountyIn Association with Clallam County

Sewer Facilities Plan

for Carlsborg UGA

PRE – DRAFT

June 2009


Proposed Land Use

1


Sewer System for Entire UGA

2


Initial Sewer Facilities

3


Projected Wastewater FlowsIn gallons per day

4


Alternatives ConsideredCollect & Transmit to City of Sequim for Treatment & Disposal

5


Recommended Alternative

6


Estimate of Project Costs

Estimated Total Construction Costs$10,950,000

Estimated Project Cost Elements$ 4,020,000

Total Estimated Project Costs $14,970,000

7


Estimate of Project Cost Components

Interceptor Sewers$5,030,000

Collector Sewers$2,600,000

Treatment Structures$2,610,000

Treatment Process$2,630,000

Reuse Distribution$ 800,000

Surplus Water Disposal$1,300,000

Estimated Total $14,970,000

8


Treatment Facilities on PUD Operations Center Site

9


SBR Layout

10


Conversion of SBR Structures into MBR process

11


Reuse Facilities

12


Surplus Reclaimed Water Disposal on County Site along Matriotti Creek

13


Section through Percolation Basin

14


Percolation Basin Plan

15


Assumed Funding

Estimated Total Project Cost $14,970,000

Less Federal, State & Local Grants $ 5,000,000

Local Utility District Assessments $ 9,970,000

16


Property Assessment Assumptions

  • Individual parcels will be assessed for benefit received from sewer service

  • Assessment for any parcel will not exceed the benefit received

  • Initial Sewer Service Area = about 120 tax parcels

  • Final Assessments will differ from Preliminary Assessments

  • Final will use actual costs and funding, not estimates

17


Conceptual Assessment Methodology

  • Approach 1 – Assessments ratio to special benefit

    • Total Special Benefit for All Parcels

    • Compare Total Benefit with Total to be Assessed

    • Ratio Parcel Assessment

    • Special Benefit x Ratio

18


Conceptual Assessment Methodology (cont.)

  • Approach 2 – Assessment computed from unit costs

    • Define Unit Cost for Each Project Component

    • Identify Component Units for each parcel

    • Assessment = Sum of Component Units x Unit Price

      Verify that result is less than Special Benefit

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Estimated Range of Typical Preliminary Assessments

Single Family Home on small lot$13,000 to $22,000

Single Family Home on large lot$25,000 to $50,000

Small Commercial Business$18,000 to $75,000

Large Commercial Business$80,000 to $200,000

Vacant & Undeveloped Acreage$100,000 to $150,000 per acre

20


Suggest LUD Formation Process

  • Property Owners request sewer service

  • Public Hearing to discuss providing sewers

  • If sufficient interest, PUD Commissioners adopt Resolution of Intent to Form an LUD

  • Apply for funding from various federal and state sources

  • Prepare preliminary assessment roll

  • Property Owner petition for LUD

  • LUD Formation Hearing

  • If sufficient interest, PUD Commissioners form LUD

21


Estimated Monthly Service ChargeFor SBR Facility

Note: Costs estimated in constant 2009 dollars

22


Proposed Schedule

Comprehensive Land Use Plan for Carlsborg…………Aug 09

Complete BA, Hydrogeologic, Archeological, NEPA…Sep 09

Facilities Plan Completion…………………………….Oct 09

LUD Notice of Intent………………………………....Nov 09

Start engineering design & permits

Preliminary Assess & LUD Formation

Environmental Review & Approval………………….Oct 10

Engineering Design Completion……………………..Nov 10

Construction Funding………………………………..Dec 10

Start of Construction………………………………....Jan 11

Completion of Construction…………………………May 12

Beginning of Sewer Service…………………………..June 12

Initial Assessment Payment Due…………………….Oct 12

23


Letter of Concurrence Objective

  • EPA must issue a letter of concurrence before DOE can approve Facilities Plan or release funding

  • Concurrence: Project ‘Not Likely to Affect’

    • Listed or Threatened Species

    • Provides ‘Net Environmental Benefit’

24


Federal Consultation Process

  • Letter of Concurrence follows Consultation with Federal Agencies

  • Review of Facilities Plan with NEPA, Biological Assessment, Hydrogeological Evaluation and Archeological Study

  • Reviewing Agencies besides EPA include:

    • US Fish and Wildlife

    • Corps of Engineers

    • NOAA

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Potential Environmental Concerns

  • Nitrates:

    • nitrification – denitrificantion reduction to <5 mg/L

  • Phosphates:

    • filtered by soil/vegetation from percolation basin to Matriotti Creek

  • Temperature:

    • reuse water cooled by fountain, percolation & vegetation shade

  • Pharmaceuticals:

    • SBR will remove more than existing onsite systems. MBR will remove more than SBR because of longer solids holding. Residual will be below medicinal dose & not affect humans. May still be a concern for aquatic life.

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