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Governance Register
US nonprofit · EIN 237444529 · Walnut Creek, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 237444529) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe tenure.Latest return IRS Form 990 series e-file data - 990 for the year to 31 December 2025: assets, liabilities, staff, website, telephone, pay.Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue (us-approach-v4-clean). Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

MT Diablo Interpretive Assoc's network

12 people2 organisationsi12 people and 2 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (12). Violet dotted lines (2) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.

The board

12 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record. The organisation reported 12 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Carol LaneDirector2018
8 yrs
Dan SandriCompany secretary2020
6 yrs
Daniel Fitzgerald (also filed as Dan Fitzgerald)Treasurer2018
8 yrs
Dick NicollDirector2019
7 yrs
Julie Braun MartinDirector2020
6 yrs
Leslie ContrerasDirector2018
8 yrs
Linda KwongDirector2018
8 yrs
Mark BrauerDirector2023
3 yrs
Mike BrandyVice President2019
7 yrs
Steve SmithPresident2018
8 yrs
Steve ViarengoDirector2025
1 yr
Terese DixonDirector2022
4 yrs
Under 5 years5 to 6 years6 years or moreShow all 12 →

Pay and hours

year to 31 December 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Leslie ContrerasDirector4$0
Daniel FitzgeraldTreasurer12$0
Carol LaneDirector8$0
Mike BrandyVice President16$0
Dick NicollDirector12$0
Terese DixonDirector8$0
Steve ViarengoDirector4$0
Julie Braun MartinDirector8$0
Mark BrauerDirector4$0
Linda KwongDirector4$0
Dan SandriSecretary12$0
Steve SmithPresident16$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Mt Diablo Interpretive Assoc
EIN
237444529
Address
Po Box 346, Walnut Creek, CA, 94597-0346
State
California
Mission
To assist with maintaining and interpreting mount diablo state park, an ecological treasure of the san francisco bay area. (as filed on the Form 990)
Activity (NTEE)
N320 Recreation and sports
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Recreation & Sports
Size band
6 (IRS master file code)
Formed
1974
Principal officer
Daniel Fitzgerald (as named on the Form 990)
IRS ruling date
1 March 1975
Status
Code 01 (unconditional exemption)
Form 990 filings on record
8, latest 2025
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsCarol Lane
≥8years on the filingsDaniel Fitzgerald
≥8years on the filingsLeslie Contreras
≥8years on the filingsLinda Kwong

Latest return

year to 31 December 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2025. US dollars, as filed.
Total assets
$1.3m
Total liabilities
$12k
Net assets or fund balances
$1.3m
Contributions and grants received
$267k
Program service revenue
$140
Employees
0
Volunteers
35

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$457k$197k$260k

As filed on the IRS Form 990. US dollars.