Mono Basin Historical Society

Nonprofit profile at a glance

EIN
912053114
IRS 990-EZ coverage
2022–2025
Forms available
Form 990-EZ 2025, Form 990-N 2023
Location
Lee Vining, CA, USA
Phone
7606476461
Rating
60
Verdict
SUPPORTED
Rating confidence
Moderate
Sector
Historical Societies, Related Historical Activities

Reported finances

Revenue
$30,810
Expenses
$27,864
Assets
$75,820
Liabilities
$357

Source: IRS Form 990-EZ. Selected filing: tax year 2025. Amounts in USD.

Leadership & pay

5 people listed

Executive titles in this filing

  • DUNCAN KING (PRESIDENT)
  • COLE HAWKINS (VICE PRESIDENT)

People named in this filing

  • DUNCAN KING (PRESIDENT)
  • COLE HAWKINS (VICE PRESIDENT)
  • CATHY FOYE (SECRETARY)

Selected names, not a complete roster or a statement of current roles. Open leadership details for the complete filed list.

Source: IRS Form 990-EZ. Selected filing: tax year 2025. Names and roles reflect this filing, not necessarily current officeholders.

Overview

Mission

Corporation dedicated to the preservation, protection, and interpretation of the kootzadukaa paiute, pioneer, and mining heritage of the mono basin.

What it reported doing in 2025

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.

Operating model

Revenue model
Donor-supported. 68% of the money available for current operations came from contributions and gifts.
Distribution model
Hybrid. The nonprofit split its reported program spending across 65% for direct work, and 35% for grants.

The verdict

SUPPORTED - The filed numbers largely add up and program spending has grown recently. A relatively small share of available resources goes toward mission work and a relatively small share of total spending goes to programs.

Rating breakdown

  • Financial Efficiency: 29
  • Transparency & Controls: 100
  • Sustainability: 59
  • Growth: 60

Detailed rating inputs

Financial Efficiency

  • Mission deployment rate: 28.3%; rating input score 28
  • Program expense ratio: 31.2%; rating input score 31

Transparency & Controls

  • Consistency checks: 100%; rating input score 100; 51st percentile among comparable filings
  • Major donor itemization: Yes; rating input score 100

Sustainability

  • Operating margin: 9.6%; rating input score 60; 60th percentile among comparable filings
  • Total-asset coverage ratio: 2.72; rating input score 72; 72nd percentile among comparable filings
  • Liabilities to assets ratio: 0; rating input score 27; 27th percentile among comparable filings
  • Officer compensation ratio: 0%; rating input score 56; 56th percentile among comparable filings

Growth

  • Program expense growth: 12.1% per year; rating input score 100; 73rd percentile among comparable filings
  • Revenue growth: -3.3% per year; rating input score 0; 38th percentile among comparable filings
  • Asset growth: 11.3% per year; rating input score 100; 73rd percentile among comparable filings

Details

  • Where the money goes: 28.3% of revenue deployed · 31.2% of spending went to programs
  • Governance: Filed governance answers
  • Accomplishments: 2 filed program accomplishments · $9K in reported program spending
  • Leadership: top reported pay $0 · 5 people listed
  • Consistency: 9 of 9 current checks pass
  • Schedules: 3 filed schedules
  • Filing history: 3 filing years from 2022 to 2025
  • Contacts: How to reach this organization
  • Money network: Resolved incoming and outgoing counterparties from filed money flows.
  • Grant readiness: Federal tax and exclusion status, award history, and grant-maker relationships.
  • People: Everyone the filings name, and which of them the filings identify by more than a name.

Key Signals

Signals prioritize questions for review. They are not findings of misconduct.

  • High — Financial Efficiency: Mission deployment rate scored 28/100.
  • Moderate — Financial Efficiency: Program expense ratio scored 31/100.
  • High — Growth: Revenue growth scored 0/100.
  • High — Sustainability: Liabilities to assets ratio scored 27/100.
  • Review — Sustainability: Officer compensation ratio scored 56/100.