Liabilities / Assets
69th percentile
Higher debt load relative to assets than 69% of similar nonprofits.
Low Impact Development Center Inc
EIN 52-2138076 • 501(c)3 • Beltsville, MD
Profile
Foster and demostrate enviromentally sound development
Siviq Scores
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
0.23x
Liabilities / Revenue
53rd percentile
Higher debt load relative to revenue than 53% of similar nonprofits.
Net Margin
65th percentile
Higher net margin than 65% of similar nonprofits.
Top Officer Pay
Score unavailable
No filing with officer rows is available for this organization yet.
Asset Growth
78th percentile
Faster asset growth than 78% of similar nonprofits.
Revenue Growth
86th percentile
Faster revenue growth than 86% of similar nonprofits.
Balance Sheet
Assets
Up$1,294,126
Up $213,373 (+20%) from 2023
Liabilities
Down$302,770
Down $204,300 (-40%) from 2023
Net Assets
Up$991,356
Up $417,673 (+73%) from 2023
Revenue
Up$3,181,591
Up $1,150,542 (+57%) from 2023
Expenses
Up$2,763,918
Up $809,414 (+41%) from 2023
Net Income
Up$417,673
Up $341,128 (+446%) from 2023
Trend Graphs
Filings
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
- Assets
- $1,294,126
- Liabilities
- $302,770
- Net assets
- $991,356
- Revenue
- $3,181,591
- Expenses
- $2,763,918
- Net income
- $417,673
Latest Filing Detail
Jump To
Filing Snapshot
- Filing Period
- Oct 1, 2023 to Sep 30, 2024
- Signed
- Aug 4, 2025
- Return Version
- 2023v6.0
- Gross Receipts
- $3,181,591
Mission and Program Overview
Mission
The Low Impact Development Center, Inc LID Center is a non-profit 501c3 national research organization focusing on sustainable stormwater management solutions for urban and developing areas. A key program of the LID Center is focused on the integration of low impact development and sustainable green technologies into transportation projects.
The lid center helps communities improve water quality and resilience by advancing sustainable stormwater and infrastructure solutions through planning, design, technical assistance, and education.
Balance Sheet Detail
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Rtn Earn Endowment Incm Other Fnds | $573,683 | $991,356 | ▲ $417,673 |
| Accounts Receivable | $688,715 | $844,247 | ▲ $155,532 |
| Cash and Non-Interest-Bearing Accounts | $315,389 | $376,659 | ▲ $61,270 |
| Land, Buildings, and Equipment, Net | $73,472 | $72,479 | ▼ $993 |
| Prepaid Expenses and Deferred Charges | $3,177 | $741 | ▼ $2,436 |
| Savings and Temporary Cash Investments | - | $0 | - |
| Other Notes and Loans Receivable, Net | - | $0 | - |
| Pledges and Grants Receivable | - | $0 | - |
| Receivable From Disqualified Prsn | - | $0 | - |
| Receivables From Officers Etc | - | $0 | - |
| Investments Other Securities | - | $0 | - |
| Investments Program Related | - | $0 | - |
| Investments in Publicly Traded Securities | - | $0 | - |
| Intangible Assets | - | $0 | - |
| Inventories for Sale or Use | - | $0 | - |
| Total Assets | $1,080,753 | $1,294,126 | ▲ $213,373 |
| Other Assets Total | - | $0 | - |
| Liabilities | |||
| Deferred Revenue | $129,663 | $189,005 | ▲ $59,342 |
| Accounts Payable and Accrued Expenses | $323,258 | $93,262 | ▼ $229,996 |
| Mortgage Notes Payable Secured by Investment Property | $54,149 | $20,503 | ▼ $33,646 |
| Total Liabilities | $507,070 | $302,770 | ▼ $204,300 |
| Net Assets / Fund Balance | |||
| Total Net Assets Fund Balance | $573,683 | $991,356 | ▲ $417,673 |
| Total Liabilities and Net Assets / Fund Balance | $1,080,753 | $1,294,126 | ▲ $213,373 |
Asset Categories
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Equipment | $52,230 | $50,432 | $102,662 |
| Other Land Buildings | $20,249 | $45,154 | $65,403 |
Compensation and Service Providers
Employees
| Name | Title | Full / Part Time | Base | Total |
|---|---|---|---|---|
| Neil Weinstein | Executive Director | FT | $261,151 | $261,151 |
| Mary Roman | Innovative Program | FT | $226,601 | $226,601 |
| Emily Clifton | Associate Executive Director | FT | $208,820 | $208,820 |
| David Miller | Director of Engineering | FT | $182,412 | $182,412 |
Board Members and Trustees
| Name | Title |
|---|---|
| Steve Roy | President |
| David Smith | Board Member |
| John Pomponio | Board Member |
| Michael Burke | Board Member |
Highest Paid Contractors
| Contractor | Services | Location | Compensation |
|---|---|---|---|
| Rainplan DC1 LLC | Program management | 909 Rose Ave Ste 400, North Bethesda, MD 20852 | $230,905 |
| Throwe Environmental | Sustainability Planning | 10 Duffield Road, Bristol, RI 02809 | $159,905 |
Revenue and Support
Revenue Composition
- Contributions and Grants
- $441,818
- Program Service Revenue
- $2,739,773
- Investment Income
- $0
- Other Revenue
- $0
- Change in Net Assets
- $417,673
Audited Revenue Reconciliation
- Revenue per Audited Statements
- $3,181,591
- Total Revenue per Audited Statements
- $3,181,591
- Total Revenue per Form 990
- $3,181,591
Expenses and Functional Allocation
Major Expense Lines
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $2,041,541 |
| Other Expenses | $722,377 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Total Fundraising Expense | $0 |
Functional Expense Allocation
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Current Officers, Directors, Trustees, and Key Employees | $753,444 | $125,541 | - | $878,985 |
| Other Salaries and Wages | $614,515 | $188,151 | - | $802,666 |
| Other Employee Benefits | - | $171,168 | - | $171,168 |
| Payroll Taxes | - | $116,483 | - | $116,483 |
| Pension Plan Contributions | - | $72,239 | - | $72,239 |
| Information Technology | - | $66,725 | - | $66,725 |
| Occupancy | - | $25,403 | - | $25,403 |
| Office Expenses | - | $24,488 | - | $24,488 |
| Fees for Services Accounting | - | $20,920 | - | $20,920 |
| Insurance | - | $20,782 | - | $20,782 |
| Travel | $4,322 | $6,747 | - | $11,069 |
| Depreciation Depletion | - | $9,977 | - | $9,977 |
| Conferences and Meetings | - | $8,531 | - | $8,531 |
| Fees for Service Investment Mgmnt Fees | - | $5,394 | - | $5,394 |
| Fees for Services Management | - | $4,958 | - | $4,958 |
| Interest | - | $4,011 | - | $4,011 |
| Other Expenses | $25,180 | $1,835 | - | $1,835 |
| Advertising | - | $1,000 | - | $1,000 |
| All Other Expenses | - | $159 | - | $159 |
| Total Functional Expenses | $1,885,102 | $878,816 | $0 | $2,763,918 |
Audited Expense Reconciliation
| Line Item | Amount |
|---|---|
| Expenses per Audited Statements | $2,763,918 |
| Total Expenses per Audited Statements | $2,763,918 |
| Total Expenses per Form 990 | $2,763,918 |
Fundraising, Events, and Gaming
- Fundraising activities
- No
- Gaming activities
- No
- Professional fundraiser used
- No
Fundraising and Gaming Totals
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
Political and Lobbying Activity
- Political campaign activity
- No
- Lobbying activity
- No
- Subject to proxy tax
- No
Insider Transactions and Loans
Loans and Receivables
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Receivables from Disqualified Persons | - | $0 | - |
| Receivables from Officers, Directors, Trustees, and Key Employees | - | $0 | - |
Governance and Compliance
Governance Checklist
- Compiled or reviewed by an accountant
- No
- Annual disclosure for covered persons
- Yes
- Audit committee
- Yes
- Backup withholding compliance
- Yes
- Business relationship with 35% controlled entity
- No
- Business relationship with family members
- No
- Business relationship with organization members
- No
- Material changes to governing documents
- No
- Compensation from other sources disclosed
- No
- CEO compensation reviewed
- Yes
- Other officer compensation reviewed
- Yes
- Conflict-of-interest policy
- Yes
- Audited financial statements prepared
- No
- Key decisions subject to board approval
- No
- Management duties delegated
- No
Governance Explanations
Form 990, Part VI, Section A, Line 9
“Neil Weinstein: 9510 Midwood Road Silver Spring, MD 20910Steven Roy: 1000 International Drive Suite 152 Portsmouth, NH 03801David Smith: 14801 Murdock St Suite 230 Chantilly, VA 20151John Pomponio: 1702 Woodmere Way Havertown, PA 19083Michael Burke: 12201 Pleasant Prospect Mitchelville, MD 20721”
Form 990, Part VI, Section B, Line 11B
“Form 990 is prepared by a CPA and sent to two officers to review. The officers also send a copy to all board members prior to filing. Comments and revisions are returned to the CPA via email.”
Form 990, Part VI, Section B, Line 12C
“The organization reviews possible conflicts of interest whenever a new project starts. The majority of the projects are public sector or are publicly funded through grants and include a conflict of interest policy. Reviews are also conducted when a new employee is hired. In addition, a review is also performed at the semi-annual board meetings.”
Form 990, Part VI, Section B, Line 15A
“The compensation for the Executive Director is reviewed annually. The review is conducted by a board member. Performance and cost of living adjustments as set by the SSA and a review of equivalent positions based on technical and professional experience in similar public sector jobs is used in determining whether / what raise is warranted.”
Form 990, Part VI, Section C, Line 19
“Governing documents, policies and financial statements are provided upon request.”
Filing and Contact Details
Filer
- Filer Name
- Low Impact Development Center Inc
- EIN
- 52-2138076
- Phone
- 3019825559
- Address
- 5000 SUNNYSIDE AVE 100, BELTSVILLE, MD 20705
Signing Officer
- Name
- Emily Clifton
- Title
- Executive Director
- Signed
- 2025-08-04
- Discuss with paid preparer
- Yes
Organization Details
- Principal Officer
- Neil Weinstein
- Formed
- 1998
- Legal Domicile
- Md
- Voting Board Members
- 5
- Independent Board Members
- 4
- Employees
- 16
Preparer
- Firm
- Cassilly & Appel Inc
- Address
- 570 Baltimore Annapolis Blvd, Severna Park, MD 21146
- Preparer
- Virginie Bolton CPA
- Phone
- 4106477777
Supplemental Narrative
Additional Explanations
Form 990, Part III, Line 4D
“Other program services 4: other program services: this included support to a variety of municipalities for policy, planning, design, and implementation efforts. This includes planning, design, and permitting support for a green and complete street project in mount rainier, maryland, and policy development, planning, and technical assistance to cheverly and hyattsville, maryland, to advance sustainable infrastructure goals. Additional activities included the development of guidance documents and technical resources, preparation of educational materials and intrepretive signage to improve public understanding of complex environmental topics, and assistance with identifying and supporting financing strategies for the implementation of community-based projects.”
Raw XML AppendixShowing 400 of 488 raw XML fields
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
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| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 5 |
| IRS990/GovernmentGrantsAmt | 0 | 441818 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 3181591 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | true |
| IRS990/IndependentVotingMemberCnt | 0 | 4 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 4 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 66725 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 66725 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 20782 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 20782 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/ManagementAndGeneralAmt | 0 | 4011 |
| IRS990/InterestGrp/TotalAmt | 0 | 4011 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 6 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 95586 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 73472 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 72479 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 168065 |
| IRS990/LegalDomicileStateCd | 0 | MD |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | NON-PROFIT ORGANIZATION DEDICATED TO HELPING COMMUNITIES ADOPT INNOVATIVE STORMWATER MANAGEMENT PRACTICES AND SUSTAINBLE INFRASTRUCTURE SOLUTIONS THAT PROTECT PUBLIC HEALTH AND THE ENVIRONMENT. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 54149 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 20503 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 573683 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 991356 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 25403 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 25403 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 24488 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 24488 |
| IRS990/OfficerMailingAddressInd | 0 | true |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 171168 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 171168 |
| IRS990/OtherExpensesGrp/Desc | 0 | Subcontractors |
| IRS990/OtherExpensesGrp/Desc | 1 | Material and supplies |
| IRS990/OtherExpensesGrp/Desc | 2 | Licenses |
| IRS990/OtherExpensesGrp/Desc | 3 | Printing and Publications |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 4304 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 1835 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 487641 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 25180 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 487641 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 25180 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 4304 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 1835 |
| IRS990/OtherRevenueTotalAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 188151 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 614515 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 802666 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PaymentsToAffiliatesGrp/TotalAmt | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 116483 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 116483 |
| IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt | 0 | 72239 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 72239 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 3177 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 741 |
| IRS990/PrincipalOfficerNm | 0 | NEIL WEINSTEIN |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 541300 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | RELATED CONTRACTS |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 2739773 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 2739773 |
| IRS990/ProgSrvcAccomActy2Grp/Desc | 0 | THIS CONTRACT WAS TO PROVIDE STAFF AUGMENTATION SERVICES TO SUPPORT THE PRINCE GEORGE'S COUNTY CLEAN WATER PARTNERSHIP. ACTIVITIES INCLUDED SERVING AS A TECHNICAL DIRECTOR FOR THE STORMWATER MANITENANCE PROGRAM; ACTING AS A LIAISON TO COUNTY AND STATE REGULATORY AGENCIES; PROVIDING TECHNICAL OVERSIGHT FOR THE PLANNING AND IMPLEMENTATION OF A LARGE, COMPLEX STORMWATER MANAGEMENT AND FLOOD MITIGATION PROJECT; PREPARING AND MONITORING PROGRAM AND PROJECT BUDGETS; AND CONTRIBUTING TO LONG-TERM CAMPITAL IMPROVEMENT PLANNING. |
| IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt | 0 | 216079 |
| IRS990/ProgSrvcAccomActy2Grp/RevenueAmt | 0 | 401907 |
| IRS990/ProgSrvcAccomActy3Grp/Desc | 0 | THE LID CENTER IS UNDER A MULTI-YEAR CONTRACT TO ASSIST PRINCE GEORGE'S COUNTY, MD, MEET ITS STORMWATER PERMIT, CHESAPEAKE BAY WATERSHED, AND RELATED STORMWATER AND COMMUNITY GOALS AND RESQUIREMENTS. THE FIVE PROJECT AREAS ARE: 1) MUNICIPAL NPDES PHASE II SUPPORT; 2) MUNICIPAL AND COUNTY NPDES PROPERTY MANAGEMENT, SWPPP AND GOOD HOUSEKEEPING SUPPORT; GREEN INFRASTRUCTURE CONTRACTOR TRAINING; TECHNICAL PLANNING, DESIGN PROJECT MANAGEMENT, AND OUTREACH SUPPORT; AND GRANTS MANAGEMENT SUPPORT SERVICES FOR STORMWATER AND FLOOD MANAGEMENT PROJECTS ASSOCIATED WITH DAM SAFETY, FLOOD ATTENUATION, WATER QUANTITY CONTROL, AND COMMUNITY LIVABILITY. |
| IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt | 0 | 152505 |
| IRS990/ProgSrvcAccomActy3Grp/RevenueAmt | 0 | 389080 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 177330 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 449557 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 1853719 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 76545 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 1504947 |
| IRS990/PYTotalExpensesAmt | 0 | 1954504 |
| IRS990/PYTotalRevenueAmt | 0 | 2031049 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvblFromDisqualifiedPrsnGrp/EOYAmt | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 417673 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 2054960 |
| IRS990/RoyaltiesGrp/TotalAmt | 0 | 0 |
| IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 573683 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 991356 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 0 |
| IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearAmt | 0 | 441818 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt | 0 | 177330 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 29742 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 314304 |
| IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt | 0 | 963194 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl509Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome509Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearAmt | 0 | 2739773 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus1YearAmt | 0 | 1853719 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus2YearsAmt | 0 | 1265175 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus3YearsAmt | 0 | 1017410 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus4YearsAmt | 0 | 1643780 |
| IRS990ScheduleA/GrossReceiptsAdmissionsGrp/TotalAmt | 0 | 8519857 |
| IRS990ScheduleA/GrossReceiptsNonUnrltBusGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/InvestmentIncomeCYPct | 0 | 0.00000 |
| IRS990ScheduleA/NetIncomeFromOtherUBIGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/OtherIncome509Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/Post1975UBTIGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/PubliclySupportedOrg509a2Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY509Pct | 0 | 1.00000 |
| IRS990ScheduleA/PublicSupportPY509Pct | 0 | 1.00000 |
| IRS990ScheduleA/PublicSupportTotal509Amt | 0 | 9483051 |
| IRS990ScheduleA/SubstantialContributorsAmtGrp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft509Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY509Ind | 0 | X |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearAmt | 0 | 3181591 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus1YearAmt | 0 | 2031049 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus2YearsAmt | 0 | 1294917 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus3YearsAmt | 0 | 1331714 |
| IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus4YearsAmt | 0 | 1643780 |
| IRS990ScheduleA/Total509Grp/TotalAmt | 0 | 9483051 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearAmt | 0 | 3181591 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus1YearAmt | 0 | 2031049 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus2YearsAmt | 0 | 1294917 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus3YearsAmt | 0 | 1331714 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus4YearsAmt | 0 | 1643780 |
| IRS990ScheduleA/TotalSupportCalendarYearGrp/TotalAmt | 0 | 9483051 |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 52230 |
| IRS990ScheduleD/EquipmentGrp/DepreciationAmt | 0 | 50432 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 102662 |
| IRS990ScheduleD/ExpensesSubtotalAmt | 0 | 2763918 |
| IRS990ScheduleD/OtherLandBuildingsGrp/BookValueAmt | 0 | 20249 |
| IRS990ScheduleD/OtherLandBuildingsGrp/DepreciationAmt | 0 | 45154 |
| IRS990ScheduleD/OtherLandBuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 65403 |
| IRS990ScheduleD/RevenueSubtotalAmt | 0 | 3181591 |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 72479 |
| IRS990ScheduleD/TotalExpensesPerForm990Amt | 0 | 2763918 |
| IRS990ScheduleD/TotalRevenuePerForm990Amt | 0 | 3181591 |
| IRS990ScheduleD/TotalRevEtcAuditedFinclStmtAmt | 0 | 3181591 |
| IRS990ScheduleD/TotExpnsEtcAuditedFinclStmtAmt | 0 | 2763918 |
| IRS990ScheduleJ/AnyNonFixedPaymentsInd | 0 | false |
| IRS990ScheduleJ/CompBasedOnRevenueOfFlngOrgInd | 0 | false |
| IRS990ScheduleJ/CompBsdNetEarnsFlngOrgInd | 0 | false |
| IRS990ScheduleJ/CompBsdNetEarnsRltdOrgsInd | 0 | false |
| IRS990ScheduleJ/CompBsdOnRevRelatedOrgsInd | 0 | false |
| IRS990ScheduleJ/CompensationCommitteeInd | 0 | X |
| IRS990ScheduleJ/EquityBasedCompArrngmInd | 0 | false |
| IRS990ScheduleJ/Form990OfOtherOrganizationsInd | 0 | X |
| IRS990ScheduleJ/InitialContractExceptionInd | 0 | false |
| IRS990/ScheduleJRequiredInd | 0 | true |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 0 | 182412 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 1 | 208820 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 2 | 226601 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/BaseCompensationFilingOrgAmt | 3 | 261151 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm | 0 | DAVID MILLER |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm | 1 | EMILY CLIFTON |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm | 2 | MARY ROMAN |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/PersonNm | 3 | NEIL WEINSTEIN |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt | 0 | DIR OF ENGINEERING |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt | 1 | ASSOCIATE EXECUTIVE DIRECTOR |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt | 2 | INNOVATIVE PROGRAM |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TitleTxt | 3 | Executive Dir. |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt | 0 | 182412 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt | 1 | 208820 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt | 2 | 226601 |
| IRS990ScheduleJ/RltdOrgOfficerTrstKeyEmplGrp/TotalCompensationFilingOrgAmt | 3 | 261151 |
| IRS990ScheduleJ/SeverancePaymentInd | 0 | false |
| IRS990ScheduleJ/SubstantiationRequiredInd | 0 | true |
| IRS990ScheduleJ/SupplementalNonqualRtrPlanInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | OTHER PROGRAM SERVICES 4: OTHER PROGRAM SERVICES: THIS INCLUDED SUPPORT TO A VARIETY OF MUNICIPALITIES FOR POLICY, PLANNING, DESIGN, AND IMPLEMENTATION EFFORTS. THIS INCLUDES PLANNING, DESIGN, AND PERMITTING SUPPORT FOR A GREEN AND COMPLETE STREET PROJECT IN MOUNT RAINIER, MARYLAND, AND POLICY DEVELOPMENT, PLANNING, AND TECHNICAL ASSISTANCE TO CHEVERLY AND HYATTSVILLE, MARYLAND, TO ADVANCE SUSTAINABLE INFRASTRUCTURE GOALS. ADDITIONAL ACTIVITIES INCLUDED THE DEVELOPMENT OF GUIDANCE DOCUMENTS AND TECHNICAL RESOURCES, PREPARATION OF EDUCATIONAL MATERIALS AND INTREPRETIVE SIGNAGE TO IMPROVE PUBLIC UNDERSTANDING OF COMPLEX ENVIRONMENTAL TOPICS, AND ASSISTANCE WITH IDENTIFYING AND SUPPORTING FINANCING STRATEGIES FOR THE IMPLEMENTATION OF COMMUNITY-BASED PROJECTS. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | Neil Weinstein: 9510 Midwood Road Silver Spring, MD 20910Steven Roy: 1000 International Drive Suite 152 Portsmouth, NH 03801David Smith: 14801 Murdock St Suite 230 Chantilly, VA 20151John Pomponio: 1702 Woodmere Way Havertown, PA 19083Michael Burke: 12201 Pleasant Prospect Mitchelville, MD 20721 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | Form 990 is prepared by a CPA and sent to two officers to review. The officers also send a copy to all board members prior to filing. Comments and revisions are returned to the CPA via email. |
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