Carbella Bridge · Photo: Robstutz · CC BY-SA 3.0Living in Corwin Springs, MT: what to set up and who to call
Corwin Springs has no town government of its own, so Park County runs its elections and most services, and its children attend Gardiner Elementary School District. The ER is a drive from Corwin Springs: the closest is Bozeman Health Big Sky Medical Center, 33.7 miles away.
I’m new in town
What to set up in Corwin Springs, and who provides it. Tap an answer for the details and where they come from.
Power, water and internet
Who to call to start service at a new address in Corwin Springs.
Power comes from NorthWestern Energy
NorthWestern Energy (NorthWestern Energy LLC - (MT)), an investor-owned utility, serves all of Corwin Springs. Its homes paid an average of 14.4¢ per kWh in 2025, about $102 a month (its average across Montana, for customers on its standard service). Montana lets you buy power from another supplier; 0% of NorthWestern Energy’s home customers do, and NorthWestern Energy still delivers it.
Start or move service: northwesternenergy.com · (888) 467-2669
Service territory: HIFLD Electric Retail Service Territories (map dated Aug 2023). Prices and customers: EIA-861, 2025.
Water comes from Ranch Headquarters water system
The Ranch Headquarters water system supplies Corwin Springs: about 4% of residents live in its service area. About 96% of homes are outside any mapped community water system, most likely on private wells, which EPA doesn’t regulate. It draws ground water and serves 85 people in all.
No health-based violations reported to EPA in the five years to October 2026, like 78% of the 11,392 systems serving <=100 people.
The latest lead result on file, the 90th percentile of homes sampled in Jan–Jun 2026, was 0.0 ppb, below the 15 ppb action level that applied. The highest in five years was 2.0 ppb. Results below detection are reported as 0, so 0 doesn’t mean no lead at any tap.
The system’s full record: EPA ECHO report
EPA SDWIS via Envirofacts (violations pulled Oct 9, 2026) and ECHO (lead samples, 2026Q3); service area: EPA Community Water System Service Area Boundaries v3.0 (EPA’s estimate). Violations are counted by the start of their compliance period. MT0003199.
Which providers serve Corwin Springs
This card will list the home internet providers the FCC’s National Broadband Map shows in Corwin Springs, the share of addresses that can get 100/20 Mbps and the share with fiber, with the map’s “as of” date.
Source to come: FCC Broadband Data Collection.
We don’t have Corwin Springs’ trash rules yet
Pickup rules, the dump and recycling in Corwin Springs.
Where your child goes to school
Public school districts and the school path by grade.
Corwin Springs is in two districts that split the grades: Gardiner Elementary School District and Gardiner High School District.
Test scores and every school: see Schools →U.S. Department of Education, NCES Common Core of Data, 2024–25. Enrollment rules and registration are the district’s.
No town hall: the county runs things
Corwin Springs is unincorporated, so Park County is the local government.
Election office: FVAP local election office directory, updated Apr 2025; jurisdictions: EAC EAVS 2024. Registration rules and links: vote.gov, updated Nov 18, 2024.
Corwin Springs is in ZIP code 59030
ZIP codes where Corwin Springs residents live, with the share of the town in each.
| ZIP | Post office name | Share of Corwin Springs | ZIP’s residents in Corwin Springs |
|---|---|---|---|
| 59030 | Gardiner, MT | 100% | 9% |
Census 2020 ZIP Code Tabulation Areas, by census block; post office names: GeoNames (CC BY 4.0). ZIPs created since 2020 are missing.
Getting around, the ER and the library
One line each; the subject pages have the rest.
ER: CMS hospital data. Library: IMLS Public Libraries Survey, FY2024.
Questions about living in Corwin Springs
Who supplies Corwin Springs’ drinking water, and has it had violations?
The Ranch Headquarters water system (EPA ID MT0003199). It reported no health-based violations to EPA in the five years to October 2026; 78% of systems its size had none. Its latest lead 90th percentile was 0.0 ppb (Jan–Jun 2026), against a 15 ppb action level.
Who provides electricity in Corwin Springs?
NorthWestern Energy (NorthWestern Energy LLC - (MT)), an investor-owned utility. Its homes paid about 14.4¢ per kWh in 2025 (EIA).
What ZIP codes are in Corwin Springs?
59030. Census 2020 ZIP Code Tabulation Areas.
What school district is Corwin Springs in?
Gardiner Elementary School District and Gardiner High School District.
How do I register to vote in Corwin Springs?
Montana has no online registration; you can register in person up to and including Election Day or by mail (postmarked 30 days before). Elections here are run by the Park County Election Administrator. Check your registration at prodvoterportal.mt.gov.
Sources & dates
Every answer above names its source. Here they are with their dates.
- Water: EPA SDWIS (Envirofacts, pulled Oct 9, 2026), ECHO SDWA 2026Q3, EPA CWS Service Area Boundaries v3.0.
- Power: HIFLD Electric Retail Service Territories (map Aug 2023); EIA-861 final 2025.
- Trash: OpenStreetMap, Geofabrik extract of Oct 9, 2026. © OpenStreetMap contributors (ODbL).
- ZIP codes: Census 2020 ZCTA relationship files; GeoNames postal codes (CC BY 4.0).
- Schools: NCES Common Core of Data, 2024–25.
- Registration: vote.gov, updated Nov 18, 2024 (read Oct 10, 2026). Official sites and area codes: Wikidata.
- Election office: FVAP local election office directory (fetched Oct 10, 2026; each record dated), EAC EAVS 2024 jurisdictions; registration and lookup links from vote.gov’s state data, checked Oct 10, 2026.
- Internet (FCC): pending.