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Nonprofit · EIN 51-0526541

ATCHAFALAYA BASINKEEPER INC

Tax-exempt · PLAQUEMINE, LA 70765

Financials

$307K$186K2023$478K$320K2024$426K$350K2025
Revenue Expenses · by fiscal year end
Financials of ATCHAFALAYA BASINKEEPER INC by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2025990$425,644$349,767$75,877$571,476$8,474$563,002
December 31, 2024990$477,796$319,767$158,029$498,121$10,996$487,125
December 31, 2023990$306,556$186,414$120,142$334,612$5,516$329,096
Financial details: 990 for the year ended December 31, 2025

Revenue

Contributions, gifts and grants
$415,486
Program service revenue
$0
Investment income
$3,806
Other revenue
$6,352

Expenses

Grants and similar amounts paid
$0
Compensation of officers, directors and key employees
$79,206
Salaries, compensation and benefits (total)
$282,040
Professional fundraising fees
$0
Accounting fees
$5,885
Program services (functional)
$282,261
Management and general (functional)
$64,001
Fundraising (functional)
$3,505

Balance sheet and other

Total assets, start of year
$498,121
Total assets, end of year
$571,476
Total liabilities, end of year
$8,474
Net assets, end of year
$563,002
Publicly traded securities
$5,014
Gross receipts
$425,644
Employees
6
Volunteers
20
Year formed
2004
State of legal domicile
LA

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 for the year ended December 31, 2025, highest compensation first.

NameTitleHours / weekCompensation
DEAN WILSONEXECUTIVE DIRECTOR
Key employee, Highest-paid employee
40$79,206
CHARLES FRYLINGBOARD CHAIR
Trustee or director, Officer
0$0
DAVID BROWNTREASURER
Trustee or director, Officer
0$0
GARY SHAFFERBOARD MEMBER
Trustee or director
0$0
DAN COLLINSBOARD MEMBER
Trustee or director
0$0
VERONICA TAYLORBOARD MEMBER
Trustee or director
0$0
ROSA ACHESONBOARD MEMBER
Trustee or director
0$0
990 for the year ended December 31, 2024: 9 people
NameTitleHours / weekCompensation
DEAN WILSONEXECUTIVE DIRECTOR
Key employee, Highest-paid employee
40$71,560
CHARLES FRYLINGBOARD CHAIR
Trustee or director, Officer
0$0
DAVID BROWNTREASURER
Trustee or director, Officer
0$0
GARY SHAFFERBOARD MEMBER
Trustee or director
0$0
JODY MECHEBOARD MEMBER
Trustee or director
0$0
DAN COLLINSBOARD MEMBER
Trustee or director
0$0
VERONICA TAYLORBOARD MEMBER
Trustee or director
0$0
ROSA ACHESONBOARD MEMBER
Trustee or director
0$0
AVERY THERIOTBOARD MEMBER
Trustee or director
0$0
990 for the year ended December 31, 2023: 8 people
NameTitleHours / weekCompensation
DEAN WILSONEXECUTIVE DIRECTOR
Key employee, Highest-paid employee
40$69,340
CHARLES FRYLINGBOARD CHAIR
Trustee or director, Officer
0$0
DAVID BROWNTREASURER
Trustee or director, Officer
0$0
GARY SHAFFERBOARD MEMBER
Trustee or director
0$0
JODY MECHEBOARD MEMBER
Trustee or director
0$0
DAN COLLINSBOARD MEMBER
Trustee or director
0$0
VERONICA TAYLORBOARD MEMBER
Trustee or director
0$0
ROSA ACHESONBOARD MEMBER
Trustee or director
0$0

Address and contacts

Address (IRS master file)
PO BOX 410, PLAQUEMINE, LA 70765-0410
In care of
% DEAN A WILSON
Mailing address (990-N for 2007)
162 CROYDON AVENUE, BATON ROUGE LA 70806
Principal officer (990 for 2025)
DEAN WILSON, 32675 GRACIE LANE UNIT D, BATON ROUGE, LA 70764
Principal officer (990-N for 2007)
DEAN WILSON, 162 CROYDON AVENUE, BATON ROUGE LA 70806
Signed the 990
DEAN WILSON, EXECUTIVE DIRECTOR
Phone
(225) 692-4114
Return prepared by
THE LEVY COMPANY

Mission

Works with diverse partner organizations, communities, agencies, regulated industry commercial and recreational users of the Basin, outdoor enthusiasts and concerned citizens in collective stewardship to preserve this ecological wonder.

990 for the year ended December 31, 2025

Program accomplishments

  • ON-GOING MONITORING OF BASIN FOR ILLEGAL ACTIVITIES OR ACTIVITIES DAMAGING TO BASIN ENVIRONMENT. ADVOCACY/EDUCATION TO PROTECT ATCHAFALAYA BASIN.
    Expenses $282,261

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026990 on file
2024December 31, 2024May 15, 2025990 on file
2023December 31, 2023May 15, 2024990 on file

IRS record

EIN
51-0526541
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
2006
Accounting year ends
December
Files
Form 990 or 990-EZ
Category (NTEE)
Environment (C32)
Assets (IRS master file)
$571,476
Income (IRS master file)
$425,644

Filing history

FormYear endedRevenueExpensesAssetsReturn
990December 2025$425,644$349,767$571,476XML
990December 2024$477,796$319,767$498,121XML
990December 2023$306,556$186,414$334,612XML
990-EZDecember 2022–––IRS
990-EZDecember 2021–––IRS
990December 2020–––IRS
990December 2018–––IRS
990December 2017–––IRS
990-N for 2007
Officer: DEAN WILSON
December 31, 2007≤ $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 51-0526541).

Questions about ATCHAFALAYA BASINKEEPER INC

What is the EIN of ATCHAFALAYA BASINKEEPER INC?
The employer identification number (EIN) of ATCHAFALAYA BASINKEEPER INC is 51-0526541.
Is ATCHAFALAYA BASINKEEPER INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2006.
Are donations to ATCHAFALAYA BASINKEEPER INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does ATCHAFALAYA BASINKEEPER INC file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of ATCHAFALAYA BASINKEEPER INC 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 ATCHAFALAYA BASINKEEPER INC last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended December 2025.
Who is the principal officer of ATCHAFALAYA BASINKEEPER INC?
The 990 for the year ended December 31, 2025 names DEAN WILSON.
Who are the officers and directors of ATCHAFALAYA BASINKEEPER INC?
The 990 for the year ended December 31, 2025 lists 7 people; 1 received compensation from the organization, the highest $79,206 (DEAN WILSON, EXECUTIVE DIRECTOR).
How much revenue does ATCHAFALAYA BASINKEEPER INC have?
On its 990 for the year ended December 31, 2025 it reported revenue of $425,644, expenses of $349,767 and total assets of $571,476 at year end.

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