Is it real?
Yes. Never revoked by the IRS. Latest filing on record: FY2025. IRS ruling in Mar 1985.
IRS Pub. 78 · IRS Auto-Revocation List · IRS Business Master File
Where the money goes
80 cents of each dollar spent went to programs.
Form 990 Part IX, line 25, columns B–D. Every line is in By the numbers.
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Who runs it and what they're paid
10 people listed on the 990; $16K paid to officers and key staff.
Mary Carol Potts’s $16K as Curator, Treasurer & Director is at the 12th percentile of top reported officer pay among 2216 $100K–1M arts & culture nonprofits. Peer set: organizations in the same NTEE major field of work and revenue-size band, compared on each org’s own highest-paid officer/key-employee, from Form 990 Part VII / 990-PF Part VIII. Descriptive placement, not a verdict on whether the pay is appropriate.
Compensation history total reportable pay by year · 1 named individual · Part VII
| Name | FY2025 | FY2024 | FY2023 | FY2022 | FY2021 | FY2020 |
|---|---|---|---|---|---|---|
| Mary Carol Potts | $15,550 | $13,610 | $10,871 | $8,835 | $9,803 | $8,930 |
Total reportable compensation (Form 990 Part VII column D / Schedule J column E) by filing year, matched by name within this organization. The Schedule J base / bonus / deferred breakdown is not parsed into this dataset.
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Questions the 990 asks
The form asks each of these directly. These are the filed answers.
- Family or business ties among officersPt VI · Ln 2Yes
- Top official's pay set by an independent reviewPt VI · Ln 15aNo
Programs and updates
Preserves and displays early South Dakota and US history through collections and data.
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To collect, preserve and display articles from early history in a free museum, including what is referred to as medicine rock and maintain a public libary
To maintain and give free tours of an old blacksmith shop, country school house and other historical buildings
To display exhibits depicting early history, including speakers AND/OR demonstrations
Funders
Who pays for it.
From grant filings on record. Receipts are incomplete: individual donors are never listed.
Grants
By the numbers
The FY2025 990, line by line.
Download 990
| Line | Start FY25 | End FY25 |
|---|---|---|
| Cash and savingsLn 1–2 | $162K | $149K |
| InvestmentsLn 11–13 | $276K | $300K |
| Land, buildings, equipmentLn 10c | $218K | $249K |
| Total assetsLn 16 | $656K | $699K |
| LiabilitiesLn 26 | $0 | $0 |
| Net assetsLn 32 | $656K | $699K |
| Line | Total | Programs | Management | Fundraising |
|---|---|---|---|---|
| Other salaries and wagesLn 7 | $24K | $22K | $2K | $0 |
| Payroll taxesLn 10 | $2K | $2K | $161 | $0 |
| Accounting feesLn 11c | $921 | $921 | $0 | $0 |
| Investment management feesLn 11f | $3K | $0 | $3K | $0 |
| Advertising and promotionLn 12 | $580 | $580 | $0 | $0 |
| Office expensesLn 13 | $385 | $385 | $0 | $0 |
| OccupancyLn 16 | $18K | $17K | $2K | $0 |
| Depreciation, depletion and amortizationLn 22 | $4K | $4K | $150 | $0 |
| InsuranceLn 23 | $11K | $5K | $6K | $0 |
| Other expenses (24a–d)Ln 24 | $2K | $2K | $93 | $0 |
| Total functional expensesLn 25 | $66K | $53K | $13K | $0 |
Filing history
| Year | Money in | Money out | In minus out | Net assets | Download |
|---|---|---|---|---|---|
| FY2025 Latest Viewing | $109K | $66K | $43K | $699K | 990 PDF |
| FY2024 | $98K | $80K | $18K | $656K | 990 PDF |
| FY2023 | $79K | $85K | −$7K | $638K | 990 PDF |
| FY2022 | $57K | $79K | −$22K | $645K | 990 PDF |
| FY2021 | $77K | $83K | −$6K | $667K | 990 PDF |
| FY2020 | $376K | $77K | $299K | $674K | 990 PDF |
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Schedules filed Part IV
See the full FY2025 990 (6 parts)
Part I · Summary $108,621 revenue, 12 lines filed
Part VI · Governance 10 of 10 board members independent, 5 to look at
Part VIII · Statement of revenue $108,621 across 8 lines filed
Part IX · Statement of functional expenses $66,025 across 10 lines filed
Part X · Balance sheet $698,748 assets, 10 lines filed
Part XI · Reconciliation of net assets $698,748 net assets at year end
Form 990 e-file (XML) FY2025 from the IRS · Classification, formation year and address from the IRS Business Master File
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