Michigan · Nonprofit
HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY
HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY (Michigan) receives grants from 2 organizations whose IRS filings report $5,361 to it, the largest being THE KAREN & DREW PESLAR FOUNDATION ($5,000). 1 of them have funded it in more than one year.
- Revenue FY2025
- $24k
- Funders on record
- 2
- Grants received
- $5k
- Net assets
- $277k
What Harsens Island-St Clair Flats Historical Society does
Mission
The harsens island/st. Clair flats historical societys mission is to collect, protect, preserve and share with the public the unique historical artifacts and information that represents the diverse cultural composition of the people that occupied the area of the st. Clair river delta that is harsens island and the st. Clair flats.
As stated on its FY2025 Form 990-EZ.
Program
The harsens island st. Clair flats historical society opened the museum over the memorial day weekend again in 2025, with many visitors and special groups visiting throughout the summer. We maintained our normal week-end hours may-september. The speaker series again was well attended, with speakers discussing local shipwrecks, and one of our board members shared her three fires presentation (history of neighboring walpole island) designed for her 3rd graders but was well attended by many who were young at heart. The museum opened for 3 annual events and fundraisers after september, which are always popular - the fall pie sale, an edmund fitzgerald remembrance event, and the christmas cookie walk. Our major event was a murder mystery party held in june at the museum. The museum was turned into a 1928 speak-easy, where all the passengers on the tashmoo had to disembark after a body was found on the ship. Attendees had roles to play as they enjoyed appetizers and craft cocktails of the time, and solved the mystery. Everyone dressed their part and the evening was truly special.
$30,449 spent100% of program spending
The program described on its FY2025 Form 990-EZ. Program spending in total: $30,449.
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.
Balance sheet
Total assets at each year end, in dollars. The largest one-year move in total assets was 2017 to 2018, from $182k to $295k (+62%).
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.
0% of HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY’s revenue is contributions — more earned-revenue than three-quarters of its peers (78% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 5 of the last 9 reported years ran a deficit.
Leadership and staff
Board chair
Bob Williams
Chairman of
As listed on its FY2025 Form 990-EZ.
Who funds it, year by year
2020 → 2023: the base narrowed from 2 funders to 1 funder, grant income fell $5k → $118.
1 of 2 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 7% 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 HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY’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
HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY leans on a few funders — its largest provides 93% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
Largest funder’s share by year: 2020 100% · 2021 100% · 2022 100% · 2023 100% — broadly stable.
“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
100% of HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY's grant income comes from Michigan funders.
Funder states come from each funder’s own filing. $361 arriving through sponsors registered in 1 state is 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.
Against its field
HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY has grown faster than half of the 10,242 arts & culture nonprofits its size.
this organization peer median middle 50% of peers· 10,242 arts & culture nonprofits under $100k, FY2025
Organizations like HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In Michigan
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Public support
99%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY: 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. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY?
- HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY (Michigan) receives grants from 2 organizations whose IRS filings report $5,361 to it, the largest being THE KAREN & DREW PESLAR FOUNDATION ($5,000). 1 of them have funded it in more than one year.
- How many funders does HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY have?
- IRS filings report 2 organizations giving $5,361 in grants to HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY, 1 of which have funded it in more than one year.
- Who is the largest funder of HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY?
- THE KAREN & DREW PESLAR FOUNDATION is the largest funder on record, with $5,000 in grants. The full list of funders is on this page.
- How can an organization like HARSENS ISLAND-ST CLAIR FLATS HISTORICAL SOCIETY find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Michigan. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds Harsens Island-St Clair Flats Historical Society →
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 2 funders 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 October 14, 2026. What this page cannot tell you · view filing