St. Onge: Infrastructure

Day-to-day services in St. Onge include the Deadwood water system, 3 fire stations, and 3 police facilities. Broadband at 100/20 Mbps reaches 100% of premises.

Water & Sewer

Active community water systems serving residents (EPA SDWIS). Each PWS has a unique ID and reports the population it serves.

Systems (5)

Deadwood
SD4600104
Lead-Deadwood Sanitary District
SD4600190
Spearfish
SD4600311
Mountain Plains 2 Homeowners Assoc
SD4602169
Saint Onge Sewer & Water Co
SD4600287

Power & Energy

Electric utility data from EIA Form 861 — provider, residential rate, customer count, and revenue. Rate reflects the average residential ¢/kWh.

Electricity · Electricity rate (¢/kWh)12.86¢/kWh
Electricity · Customers433,548
Electricity · Revenue Millions$665
Electricity · Year2024

Sources: EIA Annual Retail Sales 2023  ·  Refreshed 2026-04-12

Internet & Mobile

Broadband and mobile coverage from FCC Form 477. Percentages reflect the share of premises that can subscribe to service at the listed speed (not necessarily the share who do).

Broadband · % of premises with 25/3 Mbps broadband100.0%
Broadband · % of premises with 100/20 Mbps broadband100.0%
Broadband · % of premises with 250/25 Mbps broadband100.0%
Broadband · % of premises with 1 Gbps / 100 Mbps broadband0.0%
Broadband · Broadband-capable premises132
Mobile Broadband · 3G mobile coverage0%
Mobile Broadband · 4G mobile coverage100%
Mobile Broadband · 5G mobile coverage100%
Mobile Home Parks Detail · County total2

Sources: FCC BDC Jun 2025 · FCC BDC Mobile 2024 · HIFLD / IRS BMF  ·  Refreshed 2026-04-12

Public Safety Stations

Fire, EMS, and police stations within range — HIFLD federal datasets. Distance is great-circle from the town centroid.

Ems Stations (3)

SPEARFISH EMERGENCY AMBULANCE SERVICE INCORPORATED
715 EAST COLORADO BOULEVARD · (605) 642-8810 · 2.5 mi
SAINT ONGE VOLUNTEER FIRE DEPARTMENT INCORPORATED
110 1ST STREET · (605) 210-1978 · 7.4 mi
LEAD VOLUNTEER FIRE DEPARTMENT
801 WEST MAIN STREET · (605) 584-1617 · 7.7 mi

Fire Stations (3)

Spearfish Volunteer Fire Department
710 Heritage Drive · 0.7 mi
Spearfish Volunteer Fire Department
622 North Canyon Street · 3.3 mi
Deadwood Volunteer Fire Department
737 Main Street · 7.0 mi

Police Stations (3)

SPEARFISH POLICE DEPARTMENT
625 5TH STREET · (605) 642-1300 · 3.3 mi
BLACK HILLS STATE UNIVERSITY POLICE
1200 UNIVERSITY STREET · NOT AVAILABLE · 4.0 mi
SOUTH DAKOTA COMMISSION ON GAMING LAW ENFORCEMENT
696 MAIN STREET, 2ND FLOOR · (605) 578-3074 · 6.9 mi

Transportation

Nearest airport, Amtrak, and transit stations. Distance is great-circle miles from the town centroid.

Nearest Airport · NameMitchell's Strip
Nearest Airport · Typesmall airport
Nearest Airport · Distance1.2 mi

Sources: OurAirports.com  ·  Refreshed 2026-04-12

Dams & Hazards

Dams In County · Total11

Sources: NID 2026  ·  Refreshed 2026-04-12

Other

Infrastructure Quality · Broadband Coverage100%
Infrastructure Quality · Internet Adoption Pct100.0%
Infrastructure Quality · Municipal WaterYes
Infrastructure Quality · Strengthsexcellent broadband, high internet adoption, municipal water
Natural Gas · Price Per Mcf$12
Natural Gas · Year2024
Natural Gas · Pct Homes Using Gas100.0%
Nearest Weather Station · IdUSC00392207
Nearest Weather Station · NameDEADWOOD
Nearest Weather Station · Distance0.1 mi
Nearest Weather Station · Noaa Urlhttps://www.ncei.noaa.gov/cdo-web/datasets/GHCND/stations/USC00392207/detail
Plant Hardiness Zone · Zone5a
Plant Hardiness Zone · Min Temp F-20
Plant Hardiness Zone · Max Temp F-15

Sources: EIA state residential price + Census B25040 · NOAA GHCN-Daily station list — nearest by coordinates · USDA PHZM API