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Deltares Usa Inc

  • Silver Spring, MD
  • Tax-exempt since Feb. 2010
  • EIN: 26-3402690

Organization summary

Type of Nonprofit

Designated as a Organizations for any of the following purposes: religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn't provide athletic facilities or equipment), or the prevention of cruelty to children or animals.

Category: Science and Technology Research Institutes, Services / Science, General (NTEE)

Donations to this organization are tax deductible.

Summary charts: organization finances over time

Revenue
$5.54M (2023)

Expenses
$5.01M (2023)

Total Assets
$3.51M (2023)

Total Liabilities
$2.39M (2023)

Source: Form 990 tax filings from 2011 to 2023

Tax Filings and Audits by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Audits are required to be submitted by nonprofit organizations that spend $750,000 or more in federal grant money in a fiscal year. "Single audits" look at the entire organization's finances and compliance, while other audits are program specific. Nonprofit Explorer has PDFs of audits for some nonprofits for fiscal year 2015 and later. Audit data is from the Federal Audit Clearinghouse.

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$5,536,421
Expenses
$5,007,937
Net Income
$528,484
Net Assets
$1,123,050
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $5,536,421
100%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $4,656,543
93.0%
Compensation of Officers* $210,311
4.2%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $3,510,813
Total Liabilities $2,387,763
Net Assets $1,123,050
Compensation
Key Employees and Officers Compensation Other
Edwin Welles (Director) $210,311 $43,673
Benjamin Balk (Scientist V) $169,603 $38,152
Cornelis Nederhoff (Scientist Iv) $149,213 $15,990
Maarten Van Ormondt (Scientist V) $135,681 $8,141
Amanda Getz (Administrator Ii) $105,647 $10,286
Keren Bolter (Scientist Iv) $101,849 $27,980
Willem Jan Ribberink (Secretary) $0 $0
Michel Van Swietan (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
Guy Gelfenbaum (Director) $0 $0
Antonia Sebastian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on June 12, 2024

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML
Audit

Audit for an entity that spends $750,000+ in federal grant money in a fiscal year

PDF

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$5,738,851
Expenses
$5,834,330
Net Income
-$95,479
Net Assets
$594,566
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $7
0.0%
Dividends $0
Sales of Assets $0
Other Income $5,738,844
100.0%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $5,776,811
99.0%
Compensation of Officers* $193,479
3.3%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $2,638,806
Total Liabilities $2,044,240
Net Assets $594,566
Compensation
Key Employees and Officers Compensation Other
Edwin Welles (Director) $193,479 $39,739
Benjamin Balk (Scientist V) $156,027 $35,827
Arnejan Van Loenen (Scientist V) $156,027 $34,224
Cornelis Nederhoff (Scientist Iv) $137,271 $16,271
Amanda Getz (Administrator Ii) $87,992 $7,039
Keren Bolter (Scientist Iv) $70,521 $22,706
Willem Jan Ribberink (Secretary) $0 $0
Michel Van Swietan (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Nov. 2, 2023

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML
Audit

Audit for an entity that spends $750,000+ in federal grant money in a fiscal year

PDF

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$4,807,660
Expenses
$4,668,421
Net Income
$139,239
Net Assets
$690,045
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $113,625
2.4%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $4,694,035
97.6%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $4,483,830
96.0%
Compensation of Officers* $182,700
3.9%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $2,728,282
Total Liabilities $2,038,237
Net Assets $690,045
Compensation
Key Employees and Officers Compensation Other
Edwin Welles (Director) $182,700 $34,559
Arnejan Van Loenen (Scientist V) $147,335 $32,437
Benjamin Balk (Scientist V) $147,335 $32,424
Kees Nederhoff (Scientist Iv) $129,624 $15,684
Amanda Getz (Business Manager) $75,351 $5,361
Willem Jan Ribberink (Secretary) $0 $0
Michel Van Swietan (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Oct. 25, 2022

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML
Audit

Audit for an entity that spends $750,000+ in federal grant money in a fiscal year

PDF

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$3,983,926
Expenses
$3,931,387
Net Income
$52,539
Net Assets
$550,806
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $3,983,926
100%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $3,441,568
87.5%
Compensation of Officers* $180,362
4.6%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $2,220,262
Total Liabilities $1,669,456
Net Assets $550,806
Compensation
Key Employees and Officers Compensation Other
Edwin Welles (Director) $180,362 $34,933
Benjamin Balk (Scientist V) $145,450 $32,758
Arnejan Van Loenen (Scientist V) $145,450 $32,673
Corneus Nederhoff (Scientist Iv) $127,960 $16,983
Claire Jeuken (Scientist Vi) $108,490 $6,509
Amanda Getz (Admin) $74,380 $6,211
Willem Jan Ribberink (Secretary) $0 $0
Michel Van Swietan (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Nov. 3, 2021

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML
Audit

Audit for an entity that spends $750,000+ in federal grant money in a fiscal year

PDF

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$3,847,064
Expenses
$3,961,668
Net Income
-$114,604
Net Assets
$464,105
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $3,847,064
100%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $3,872,489
97.7%
Compensation of Officers* $177,522
4.5%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $2,337,269
Total Liabilities $1,873,164
Net Assets $464,105
Compensation
Key Employees and Officers Compensation Other
Edwin Welles (Director) $177,522 $55,683
Benjamin C Balk (Hydrologist) $143,159 $53,516
Edwin Elias (Hydrologist) $117,653 $40,268
Claire Jeuken (Scientist Vi) $101,819 $6,109
Cornelus Nederhoff (Coastal Engineer) $78,716 $7,302
Amanda Getz (Business Manager) $73,209 $7,911
Willemjan F Ribberink (Secretary, Director) $0 $0
Michel Van Swieten (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Sept. 11, 2020

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$3,725,935
Expenses
$3,734,304
Net Income
-$8,369
Net Assets
$578,709
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $4,948
0.1%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $3,720,987
99.9%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $3,634,066
97.3%
Compensation of Officers* $170,849
4.6%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,910,747
Total Liabilities $1,332,038
Net Assets $578,709
Compensation
Key Employees and Officers Compensation Other
Edwin Welles (Director) $169,164 $51,339
Edwin Elias (Hydrologist) $161,656 $52,566
Benjamin C Balk (Hydrologist) $137,920 $50,852
Claire Jeuken (Scientist Vi) $94,214 $4,527
Amanda Getz (Business Manager) $70,593 $8,116
Tiantian Yang (Hydrologist) $66,107 $22,667
Soroosh Sorooshian (Director) $1,685 $0
Willemjan F Ribberink (Secretary, Director) $0 $0
Michel Van Swieten (Treasurer) $0 $0
+ View more people

Document Links

990-PF
Filed on Oct. 18, 2019

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$3,736,329
Expenses
$3,685,889
Net Income
$50,440
Net Assets
$587,078
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $3,736,329
100%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $3,573,976
97.0%
Compensation of Officers* $158,392
4.3%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,964,962
Total Liabilities $1,377,884
Net Assets $587,078
Compensation
Key Employees and Officers Compensation Other
Edwin Welles (Executive Director) $158,392 $29,683
Edwin Elias (Hydrologist) $158,392 $29,683
Benjamin C Balk (Hydrologist) $120,097 $27,295
Tiantian Yang (Hydrologist) $103,678 $20,777
Jesse Vanderwees (Hydrologist) $64,997 $10,385
Amanda Getz (Business Manager) $62,575 $5,294
Willemjan F Ribberink (Secretary, Director) $0 $0
Antonius G Segeren (President) $0 $0
Michel Van Swieten (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Oct. 25, 2018

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$4,267,344
Expenses
$4,385,700
Net Income
-$118,356
Net Assets
$536,638
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $2,925
0.1%
Dividends $0
Sales of Assets $0
Other Income $4,264,419
99.9%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $4,267,589
97.3%
Compensation of Officers* $157,939
3.6%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,712,459
Total Liabilities $1,175,821
Net Assets $536,638
Compensation
Key Employees and Officers Compensation Other
Karel Heynert (Hydrologist) $157,945 $23,400
Edwin Welles (Executive Director) $157,939 $29,028
Edwin Elias (Hydrologist) $157,939 $29,028
Benjamin C Balk (Hydrologist) $119,820 $26,647
Johan M Lemans (Hydrologist) $119,753 $26,384
Willemjan F Ribberink (Secretary, Director) $0 $0
Antonius G Segeren (President) $0 $0
Michel Van Swieten (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Nov. 14, 2017

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$3,899,760
Expenses
$3,845,073
Net Income
$54,687
Net Assets
$634,133
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $8
0.0%
Dividends $0
Sales of Assets $0
Other Income $3,899,752
100.0%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $3,477,057
90.4%
Compensation of Officers* $157,939
4.1%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $2,381,961
Total Liabilities $1,747,828
Net Assets $634,133
Compensation
Key Employees and Officers Compensation Other
Edwin Elias (Hydrologist) $157,939 $27,707
Edwin Welles (Executive Director) $157,939 $31,155
Karel Heynert (Hydrologist) $143,019 $24,159
Johan M Lemans (Hydrologist) $119,753 $23,365
Benjamin C Balk (Hydrologist) $44,907 $9,558
Willemjan F Ribberink (Secretary, Director) $0 $0
Antonius G Segeren (President) $0 $0
Michel Van Swieten (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Nov. 15, 2016

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$4,001,757
Expenses
$3,833,147
Net Income
$168,610
Net Assets
$579,446
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $4,001,757
100%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $750
0.0%
Compensation of Officers* $155,584
4.1%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $3,890,657
Total Liabilities $3,311,211
Net Assets $579,446
Compensation
Key Employees and Officers Compensation Other
Edwin Welles (Executive Director) $155,584 $0
Johan Lemans (Hydrologist) $117,814 $0
Timothy J Hopkins (Hydrologist) $84,349 $0
Willemjan F Ribberink (Secretary, Director) $0 $0
Antonius G Segeren (President) $0 $0
Paul De Vries (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on June 12, 2015

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$1,131,929
Expenses
$1,187,090
Net Income
-$55,161
Net Assets
$410,836
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $1,131,929
100%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $0
Compensation of Officers* $63,843
5.4%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,209,463
Total Liabilities $798,627
Net Assets $410,836
Compensation
Key Employees and Officers Compensation Other
Edwin Welles (Executive Director) $63,843 $0
Johan Lemans (Hydrologist) $59,722 $0
Timothy J Hopkins (Hydrologist) $51,125 $0
Willemjan F Ribberink (Secretary, Director) $0 $0
Antonius G Segeren (President) $0 $0
Paul De Vries (Treasurer) $0 $0
Soroosh Sorooshian (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Aug. 15, 2014

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2012

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$830,765
Expenses
$846,423
Net Income
-$15,658
Net Assets
$465,997
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $830,765
100%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $0
Compensation of Officers* $150,228
17.7%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,289,509
Total Liabilities $823,512
Net Assets $465,997

Document Links

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2011

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$1,645,954
Expenses
$1,424,651
Net Income
$221,303
Net Assets
$481,655
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $1,645,954
100%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $0
Compensation of Officers* $1,442,191
> 100%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,196,441
Total Liabilities $714,786
Net Assets $481,655

Document Links

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2010

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2009

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2008

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

About This Data

What Is This Data?

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Every organization that has been recognized as tax exempt by the IRS has to file Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

  • Raw filing data. Includes EINs and summary financials as structured data.
  • Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
  • Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica. Bulk PDF downloads since 2017 are available from the IRS.
  • Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
  • Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

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About Nonprofit Explorer

Nonprofit Explorer

Browse millions of annual returns filed by tax-exempt organizations with ProPublica’s Nonprofit Explorer. See details like executive compensation, revenue, expenses and more. Search for an organization or a person, or search the full text of filings.

By Andrea Suozzo, Alec Glassford, Ash Ngu and Brandon Roberts.

Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

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