South Dakota · Nonprofit
WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT
WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT (South Dakota) receives grants from 6 organizations whose IRS filings report $717,144 to it, the largest being Stanley Post 20 of the American Legion ($472,108). 3 of them have funded it in more than one year.
Against its field
WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT runs a healthier operating margin than three-quarters of the 5,983 human services nonprofits its size.
this organization peer median middle 50% of peers· 5,983 human services nonprofits $1M–$10M, FY2025
Three funders worth looking at
Grantmakers with no record of funding this organization, ranked by how strongly the co-funder graph and the mission embeddings agree. The evidence is in section 03.
- South Dakota Community Foundationshared funderslocalportfolio match
- Larson Foundationshared fundersportfolio match
- Sheldon F Reese Foundationshared fundersportfolio match
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
Government-grant reliance: 2017 46% · 2018 41% · 2019 48% · 2020 66% · 2021 58% · 2022 54% · 2023 53% · 2024 57% · 2025 59%. Grants only. Government contracts and fees sit inside program revenue.
63% of WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT’s revenue is contributions — about as donation-reliant as the typical peer (81% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 0 of the last 9 reported years ran a deficit.
reserve
Who funds it, year by year
2017 → 2023: the base broadened from 2 funders to 3 funders, grant income rose $30k → $89k.
2 of 6 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 1% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT leans on a few funders — its largest provides 66% of grant income and the top three 99%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
100% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT.
Largest funder’s share by year: 2017 77% · 2018 100% · 2019 72% · 2020 66% · 2021 77% · 2022 57% · 2023 72% — diversifying over time.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
97% of WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT's grant income comes from South Dakota funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $7k arriving through sponsors registered in 2 statesis excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Funders to approach
Grantmakers that don’t fund you yet, surfaced two ways: they back organizations that share your funders, or their grantees resemble your mission. The ones both signals agree on come first. Your 6 funders put you under-funded among the 240 organizations that share them.
- South Dakota Community Foundationshared funderslocalportfolio matchSD · backs 87 organizations that share your funders · funds 36 organizations near you · its grantees resemble your mission
- Larson Foundationshared fundersportfolio matchSD · backs 24 organizations that share your funders · its grantees resemble your mission
- Sheldon F Reese Foundationshared fundersportfolio matchSD · backs 14 organizations that share your funders · its grantees resemble your mission
- James E & Lillian E Shea Charitable TrustlocalMT · funds 8 organizations near you
- Promise Partnersportfolio matchits grantees resemble your mission
- Sioux Empire United Way Incportfolio matchits grantees resemble your mission
- Iowa Women's Foundationportfolio matchits grantees resemble your mission
- Northwest North Dakota Community Foundation Incportfolio matchits grantees resemble your mission
- Watertown Area Community Foundationportfolio matchits grantees resemble your mission
- The Mike Cindy and Kylie Huether Family Foundationportfolio matchits grantees resemble your mission
- Watertown Area United Way Incportfolio matchits grantees resemble your mission
- United Way of Siouxland Incportfolio matchits grantees resemble your mission
From the co-funder graph (funders backing at least two comparable organizations, shrunk for grantee count, donor-advised and mega-funds excluded) and the universe embeddings. A research starting point; overlap is association, not a guarantee of fit.
Government funding WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT receives
Grants and contracts to this organization from federal (USASpending) and state checkbooks, reconciled to its EIN. $578k on record.
- Department of Transportation$578k
Federal grants vs contracts are distinguished; state line items keep their reported category. Matched by name + geography (the BMF), so coverage is partial and precision-first.
Organizations like WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT
Nonprofits whose mission and program text most resemble this one, by semantic similarity over the universe of US filings — the closest peers, and often the clearest route to shared or prospective funders.
In South Dakota
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
82% of spending goes to programs.
Governance
Public support
96%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Screen this organization
A dated, signed PDF of the compliance screen for WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT?
- WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT (South Dakota) receives grants from 6 organizations whose IRS filings report $717,144 to it, the largest being Stanley Post 20 of the American Legion ($472,108). 3 of them have funded it in more than one year.
- How many funders does WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT have?
- IRS filings report 6 organizations giving $717,144 in grants to WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT, 3 of which have funded it in more than one year.
- Who is the largest funder of WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT?
- Stanley Post 20 of the American Legion is the largest funder on record, with $472,108 in grants. The full list of funders is on this page.
- How can an organization like WEST RIVER TRANSIT AUTHORITY INC DBA PRAIRIE HILLS TRANSIT find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in South Dakota. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2017–2025), and the filings of 6funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported August 27, 2026. What this page cannot tell you · view filing