Appendix B City of Olympia Wastewater Fact Sheet
June 2013

Population and Water Use

Population (2010): City = 46,513

UGA = 11,797

 

City of Olympia’s WW utility (2010) has approx. 24,500 ERUs

Total customer accounts: Residential (incl. duplex) = 12,919; Commercial, multi-family and other = 2,040

1 ERU (for non-residential billing) = up to 900 cu.ft./mo. = 224 gpd

Average daily flow for SFR (2011) = 130 gpd

 

 

 

 

Flow

Base flow (2010; without I&I) to LOTT = 3.56 MGD

Peak Hour Flow (2010; with I&I) = 22.1 MGD

 

 

 

 

Infrastructure

 

 

 

Miles of gravity sewer collection pipe = 185

Septic Tank Effluent Pump (STEP) tanks (2012) = 1,860

Amount of gravity pipe video inspected (June 2013) = 92%

Onsite Sewage Systems (OSS) in City (2012) = 1,900

Miles of sewer force main = 8.5

OSS in UGA (2012) = 2,245

Miles of STEP main = 29

Grinder pump connections = 140+

Lift stations = 33 (including 3 private ones that we operate)

Miles of grinder force main = 1

 

 

 

 

Applicable sections of Olympia Municipal Code (OMC)

4.24.010B - Rates

13.08 Sewers - Sewer Connections, Rates, Area Service Charges, Violations

13.20 Wastewater System - Pretreatment Regulations

 

 

 

 

LOTT and National Pollution Discharge Elimination System (NPDES) Permit

- Held by LOTT, but all LOTT Clean Water Alliance Partners responsible to meet permit requirements

- Current permit’s 5-year term is October 1, 2011 - September 30, 2016

 

 

 

 

2013 Development Fees

Olympia Sewer GFC = $3,198.51

LOTT CDC = $4,718.88

 

 

 

 

 

2013 Monthly Rates (adding $1/mo. on every sewer account bill totals about $180,000/yr.)

Residential:

 

 

 

SFR w/ or w/out ADU; mobile home; or each unit of duplex = $52.53/mo. (LOTT=$33.99 + City=$18.54)

Multi-family units larger than duplex (each unit) = $36.77 (70% of 1 ERU rate)

Non-residential:

Up to 1 ERU water consumption (900 cu.ft./mo.) = $52.53/mo.

Each additional 100 cu.ft./mo. water consumed: LOTT=$3.67, City=$2.65

 

 

 

 

Budget

Annual Wastewater Budget (2012) = $5.78M (does not include LOTT wastewater service charge portion of monthly)LOTT "pass thru" wastewater service charge = $9.75M (2012; estimated)

Avg. Capital Projects/yr. = $1.6M

Debt Service & Interfund Transfers = $0.51M (2011)

Reserves = 10% of budget

 

 

 

 

1 psi = 2.3’

1 MGD = 695 gpm

MGD = million gallons per day

UGA = Urban Growth Area

cu.ft. = cubic feet

mo. = month

GFC = general facility charge

LOTT=Lacey,Oly,Tumw,ThurCo.

1ccf = 100 cu.ft .= 25 gpd

gpm = gallons per minute

CDC = capacity develop. Charge

ERU=Equivalent Residential Unit

1 cu.ft. = 7.5 gallons

gpd = gallons per day

SFR = single family residence

 

1,000m3/day = 183 gpm

gpcd = gallons per capita per day

ADU = accessory dwelling unit

 

" " = 0.26 MGD

M = million

I&I = infiltration and inflow