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FLAT ROCK BROOK NATURE ASSOCIATION

EIN 23-7323476 ENGLEWOOD, NJ

Browse the largest nonprofits in New Jersey

Revenue 2024
$1,352,963
Expenses 2024
$738,930

Program services were 77.1% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
D340
Classification
1200
Street
443 VAN NOSTRAND AVE

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Mission and programs · 2024

Mission

TO MAINTAIN THE 150-ACRE PRESERVE AS A NATURAL SANCTUARY FOR PLANTS AND WILDLIFE IN OUR URBAN AREA AND AS A NATURE PRESERVE AVAILABLE TO THE PUBLIC FOR TRAIL WALKS, NATURE STUDY AND OTHER PASSIVE RECREATION.

Activities or mission (Part I)

TO ADVANCE THE CAUSE OF NATURE STUDY PROGRAMS IN AND ABOUT ENGLEWOOD, NEW JERSEY. FLAT ROCK BROOK DEALS WITH THE PROMOTION OF RECREATIONAL AND ENVIRONMENTAL EDUCATIONAL ACTIVITY AND PROVIDES INFORMATION LEADING TO THE PRESERVATION OF WILDLIFE. IN ADDITION, FLAT ROCK MANAGES 150 ACRES OF NATURE PRESERVE IN ENGLEWOOD, NEW JERSEY.

  • FLAT ROCK BROOK'S 150 ACRES OF FORESTED LAND IS A UNIQUE SANCTUARY IN A HIGHLY URBANIZED AREA. IT ACTS AS A REFUGE FOR PLANTS AND ANIMAL SPECIES IN AN AREA OTHERWISE LACKING AN ABUNDANCE OF GREEN SPACES. AS STEWARDS OF THE LAND IT IS FLAT ROCK BROOK'S RESPONSIBILITY TO IMPLEMENT PRACTICAL AND EFFECTIVE CONSERVATION AND MANAGEMENT PROJECTS THAT ENSURE A BRIGHT FUTURE FOR THE LAND. ALL OF THESE PROJECTS AND INITIATIVES SHARE A SET OF GOALS; TO INCREASE AND CONSERVE BIODIVERSITY, INCREASE THE VIABILITY OF OUR FOREST AS WILDLIFE HABITAT, AND SUPPORT FOREST REGENERATION AND RE-GROWTH OF NATIVE VEGETATION.

    Expenses $117,524 · Revenue $11,955

  • SUMMER NATURE DAY CAMP OFFERS HANDS-ON DISCOVERY AND ADVENTURE AND GAMES FOR CHILDREN.

    Expenses $21,863 · Revenue $77,083

  • THROUGH CLASSROOM ACTIVITIES AND GUIDED NATURE HIKES, STUDENTS WILL HAVE REAL-WORLD EXPERIENCES IN NATURE TO SEE HOW THE ROCK CYCLE AND THE WATER CYCLE ARE CONNECTED AS WELL AS HOW CLIMATE CHANGE HAS AFFECTED BOTH OF THESE CYCLES. THESE CLASSES WLL HIKE TO AREAS SUCH AS OUR GLACIER ROCK TO LEARN HOW THE GLACIERS LEFT THEIR MARK, OUR STREAM TO SEE HOW THE WATER HAS ERODED THE ROCK AND STREAM BED, AS WELL AS OUR WETLAND AND ROCK QUARRY POND AREAS. ALL OF THE EDUCATION PROGRAMMING CONDUCTED THROUGH "EARTH'S ROCK AND WATER CYCLE CONNECTION" WILL AIM TO SUPPORT TEACHERS WITH THE NEW CLIMATE CHANGE CURRICULUM AS WELL AS ENHANCE THE SCIENCE AND NATURE WONDER OF STUDENTS.

    Expenses $16,000 · Revenue $16,000

  • FLAT ROCK BROOK'S ONSITE AND OUTREACH PROGRAMS BRING NATURE INTO YOUR CLASSROOM. OUTREACH PROGRAMS ARE OFFERED TO SCHOOLS, HOUSES OF WORSHIP, CAMPS, LIBRARIES, SENIOR CENTERS, AND ANY OTHER GROUP THAT WOULD LIKE TO HAVE AN IMMERSIVE LEARNING EXPERIENCE. THE CLASSROOM-BASED OUTREACH PROGRAMS ARE DESIGNED TO INSPIRE RESPECT FOR NATURE.FLAT ROCK OFFERS ONE-HOUR GUIDED NATURE WALKS FOR GROUPS YEAR ROUND. THESE WALKS ARE AVAILABLE TO GROUPS OF CHILDREN FOUR YEARS OR OLDER, YOUTH GROUPS, ADULT GROUPS, AND GROUPS WITH SPECIAL NEEDS. WALKS FOLLOW THE TRAILS AND EXPLORE THE PLANTS AND ANIMALS OF THE POND, FOREST, AND FIELD HABITATS AS WELL AS SEASONAL CHANGES AT THE PRESERVE AND CAN BE CATERED TO THE SPECIFIC NEEDS AND INTERESTS OF EACH GROUP.WE OFFER FUN, NATURE-THEMED BIRTHDAY PARTIES FOR CHILDREN AGES 4 AND OLDER.

    Expenses $414,288 · Revenue $26,750

As filed on the 2024 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Stephen Wiessner

    EXECUTIVE DIRECTOR

    Total calculated
    $108,882
    From this org
    $99,476
    From related orgs
    $0
    Other
    $9,406
    Hours/week
    40
  • Omri Amar

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Maria E Andreu

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Melinda Dean

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Jacqueline Guttman

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Jared Harary

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Annette Hollander

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Jennie Katsaros

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Kaya Kharibi-Whyte

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Susan Klausner

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Omar Lopez

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Danielle Nyman

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Michael Passow

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Henry Pruitt III

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Scott Reddin

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Sarah Russell

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Louise Schwartz

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Talia Shulman

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2
  • Lena Sung

    TRUSTEE

    Total calculated
    $0
    Hours/week
    5
  • Lauren Mitchell

    SECRETARY

    Total calculated
    $0
    Hours/week
    5
  • Vasilios Ziangos

    TREASURER

    Total calculated
    $0
    Hours/week
    5
  • Kathleen Silberstein

    1ST VICE PRESIDENT

    Total calculated
    $0
    Hours/week
    5
  • Georgeann Starace

    2ND VICE PRESIDENT

    Total calculated
    $0
    Hours/week
    5
  • Chelsea Gleis

    PRESIDENT

    Total calculated
    $0
    Hours/week
    5

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $1,352,963
    Expenses
    $738,930
    Contributions
    $1,101,161
    Grants paid
    $0
  • 2024
    Revenue
    $1,308,673
    Expenses
    $722,281
    Contributions
    $1,056,871
    Grants paid
    $0
  • 2023
    Revenue
    $758,555
    Expenses
    $664,260
    Contributions
    $542,106
    Grants paid
    $0
  • 2022
    Revenue
    $679,110
    Expenses
    $669,872
    Contributions
    $441,749
    Grants paid
    $0

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $596,976
    Expenses
    $693,283
    Assets (EOY)
    $1,459,499
  • 2020 · 990

    Revenue
    $898,829
    Expenses
    $674,199
    Assets (EOY)
    $1,708,729
  • 2019 · 990

    Revenue
    $563,169
    Expenses
    $639,500
    Assets (EOY)
    $1,402,379
  • 2018 · 990

    Revenue
    $552,788
    Expenses
    $638,767
    Assets (EOY)
    $1,403,564
  • 2017 · 990

    Revenue
    $775,574
    Expenses
    $662,860
    Assets (EOY)
    $1,465,790
  • 2016 · 990

    Revenue
    $457,134
    Expenses
    $622,608
    Assets (EOY)
    $1,365,963
  • 2015 · 990

    Revenue
    $565,414
    Expenses
    $626,075
    Assets (EOY)
    $1,481,619
  • 2014 · 990

    Revenue
    $508,149
    Expenses
    $607,046
    Assets (EOY)
    $1,510,565
  • 2013 · 990

    Revenue
    $497,889
    Expenses
    $615,329
    Assets (EOY)
    $1,677,595
  • 2012 · 990

    Revenue
    not reported
    Expenses
    $654,653
    Assets (EOY)
    $1,712,595

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

The 10 largest by cash amount. The API serves every itemized grant.

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared on its 2024 return

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 1 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.