Nonprofit · EIN 91-2053114
MONO BASIN HISTORICAL SOCIETY
Tax-exempt · LEE VINING, CA 93541
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-EZ | $30,810 | $27,864 | $2,946 | $75,820 | $357 | $75,463 |
| December 31, 2024 | 990-EZ | $22,973 | $17,489 | $5,484 | $74,021 | – | $74,021 |
Financial details: 990-EZ for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $20,999
- Membership dues
- $1,862
- Program service revenue
- $0
- Investment income
- $35
- Net income from fundraising events
- $2,681
- Net income from sales of inventory
- $5,233
Expenses
- Grants and similar amounts paid
- $3,000
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $17,449
- Professional fees and payments to contractors
- $1,625
- Occupancy
- $1,814
- Printing, publications and postage
- $435
- Other expenses
- $3,541
- Program services (functional)
- $8,692
Balance sheet and other
- Total assets, start of year
- $74,021
- Total assets, end of year
- $75,820
- Total liabilities, end of year
- $357
- Net assets, end of year
- $75,463
- Cash, savings and investments
- $72,124
- Gross receipts
- $34,515
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990-EZ for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| DUNCAN KING | PRESIDENT | 1 | $0 |
| COLE HAWKINS | VICE PRESIDENT | 1 | $0 |
| CATHY FOYE | SECRETARY | 1 | $0 |
| ELLEN KING | TREASURER | 1 | $0 |
| BOB MARKS | HISTORIAN | 1 | $0 |
990-EZ for the year ended December 31, 2024: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| DUNCAN KING | PRESIDENT | 1 | $0 |
| COLE HAWKINS | VICE PRESIDENT | 1 | $0 |
| CATHY FOYE | SECRETARY | 1 | $0 |
| ELLEN KING | TREASURER | 1 | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 31, LEE VINING, CA 93541-0031
- In care of
- % CHRIS LIZZA
- Mailing address (990-N for 2023)
- PO Box 31, Lee Vining CA 93541
- Principal officer (990-N for 2023)
- Lenore Twomey, PO Box 31, 129 Mattly Ave, Lee Vining CA 93541
- Signed the 990-EZ
- ELLEN KING, TREASURER
- Phone
- (760) 647-6461
- Website
- www.monobasinhistory.org
- Return prepared by
- Ssential Solutions
California records
California keeps its own records of charities and corporations. Search them by EIN 91-2053114 or by the name MONO BASIN HISTORICAL SOCIETY.
- Attorney General, Registry of Charities and Fundraisers
- Registration status and filed reports (CT-TR-1, RRF-1)
- Secretary of State, bizfile Online
- Corporation status, entity number, agent for service
- Franchise Tax Board
- Entity status letter (state tax exemption, good standing)
Mission
CORPORATION DEDICATED TO THE PRESERVATION, PROTECTION, AND INTERPRETATION OF THE KOOTZADUKAA PAIUTE, PIONEER, AND MINING HERITAGE OF THE MONO BASIN.
Program accomplishments
- THE MUSEUM SERVES AS COMMUNITY OUTREACH TO EDUCATEVISITORS ABOUT THE HISTORY OF THE PIONEERS AND LOCAL NATIVE AMERICANS. SALES AND DONATIONS HELP TO KEEP THE DOORS OPEN.Expenses $5,557 · grants $6,500
- THE GOST EVENT IS A FUNDRAISER THAT CONTRIBUTES TO THE EDUCATION AND SERVES AS COMMUNITY OUTREACH TO KEEP HISTORY ALIVE.A SHARED PERCENTAGE OF THE ADMISSION AND DONATIONS HELP TO KEEP THE MUSEUM DOORS OPEN.Expenses $3,135
What it must file and when
IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990-EZ on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-EZ on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-N on file |
IRS record
- EIN
- 91-2053114
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (170(b)(1)(A)(vi))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2001
- Accounting year ends
- December
- Files
- Form 990-N (e-Postcard)
- Category (NTEE)
- Arts, culture and humanities (A80)
- Assets (IRS master file)
- $75,820
- Income (IRS master file)
- $34,515
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-EZ | December 2025 | $30,810 | $27,864 | $75,820 | XML |
| 990-EZ | December 2024 | $22,973 | $17,489 | $74,021 | XML |
| 990-N for 2023 Officer: Lenore Twomey | December 31, 2023 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-EZ | December 2022 | $31,888 | $20,924 | $53,897 | IRS |
| 990-N for 2021 Officer: Robin Cassidy | December 31, 2021 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2020 Officer: Robin Cassisy | December 31, 2020 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2019 Officer: David Carle | December 31, 2019 | ≤ $50,000 receipts | – | – | e-Postcard |
990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 91-2053114).
Questions about MONO BASIN HISTORICAL SOCIETY
- What is the EIN of MONO BASIN HISTORICAL SOCIETY?
- The employer identification number (EIN) of MONO BASIN HISTORICAL SOCIETY is 91-2053114.
- Is MONO BASIN HISTORICAL SOCIETY tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2001.
- Are donations to MONO BASIN HISTORICAL SOCIETY tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does MONO BASIN HISTORICAL SOCIETY file?
- Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
- When is the next return of MONO BASIN HISTORICAL SOCIETY due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did MONO BASIN HISTORICAL SOCIETY last file with the IRS?
- The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
- Who is the principal officer of MONO BASIN HISTORICAL SOCIETY?
- The 990-N for 2023 names Lenore Twomey.
- Who are the officers and directors of MONO BASIN HISTORICAL SOCIETY?
- The 990-EZ for the year ended December 31, 2025 lists 5 people; 0 received compensation from the organization.
- How much revenue does MONO BASIN HISTORICAL SOCIETY have?
- On its 990-EZ for the year ended December 31, 2025 it reported revenue of $30,810, expenses of $27,864 and total assets of $75,820 at year end.
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