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. 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

PUD No. 1 of Clallam CountyIn Association with Clallam County

Sewer Facilities Plan

for Carlsborg UGA


June 2009

Sewer System for Entire UGA


Projected wastewater flows in gallons per day
Projected Wastewater FlowsIn gallons per day


Alternatives considered collect transmit to city of sequim for treatment disposal
Alternatives ConsideredCollect & Transmit to City of Sequim for Treatment & Disposal


Estimate of project costs
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


Estimate of project cost components
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


Conversion of sbr structures into mbr process
Conversion of SBR Structures into MBR process


Percolation basin plan
Percolation Basin Plan Matriotti Creek


Assumed funding
Assumed Funding Matriotti Creek

Estimated Total Project Cost $14,970,000

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

Local Utility District Assessments $ 9,970,000


Property assessment assumptions
Property Assessment Assumptions Matriotti Creek

  • 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


Conceptual assessment methodology
Conceptual Assessment Methodology Matriotti Creek

  • 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


Conceptual assessment methodology cont
Conceptual Assessment Methodology Matriotti Creek(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


Estimated range of typical preliminary assessments
Estimated Range of Typical Preliminary Assessments Matriotti Creek

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


Suggest lud formation process
Suggest LUD Formation Process Matriotti Creek

  • 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


Estimated monthly service charge for sbr facility
Estimated Monthly Service Charge Matriotti CreekFor SBR Facility

Note: Costs estimated in constant 2009 dollars


Proposed schedule
Proposed Schedule Matriotti Creek

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


Letter of concurrence objective
Letter of Concurrence Objective Matriotti Creek

  • 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’


Federal consultation process
Federal Consultation Process Matriotti Creek

  • 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


Potential environmental concerns
Potential Environmental Concerns Matriotti Creek

  • 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.