Liabilities / Assets
53rd percentile
Higher debt load relative to assets than 53% of similar nonprofits.
EIN 68-0016431 • 501(c)3 • Walnut Creek, CA
Profile
welcomes support and participation of the community. Members of the Walnut Creek Historical Society receive a quarterly newsletter, announcements of special events, and a discount on items sold at the museum.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
53rd percentile
Higher debt load relative to assets than 53% of similar nonprofits.
Liabilities / Revenue
79th percentile
Higher debt load relative to revenue than 79% of similar nonprofits.
Net Margin
34th percentile
Higher net margin than 34% of similar nonprofits.
Top Officer Pay
40th percentile
Higher top officer pay than 40% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
68th percentile
Faster asset growth than 68% of similar nonprofits.
Revenue Growth
12th percentile
Faster revenue growth than 12% of similar nonprofits.
Assets
Up$1,144,396
Up $111,777 (+11%) from 2023
Liabilities
Up$93,726
Up $50,176 (+115%) from 2023
Net Assets
Up$1,050,670
Up $61,601 (+6.2%) from 2023
Revenue
Down$215,255
Down $77,699 (-27%) from 2023
Expenses
Down$219,269
Down $26,217 (-11%) from 2023
Net Income
Down-$4,014
Down $51,482 (-108%) from 2023
Most recent year
2024 • Form 990XML pending. An XML filing is linked for this year, but detailed extraction is still pending.
The latest 2024 filing currently has linked XML that has not been fully parsed yet. Showing the latest detailed filing from 2022 below.
welcomes support and participation of the community. Members of the Walnut Creek Historical Society receive a quarterly newsletter, announcements of special events, and a discount on items sold at the museum.
The Walnut Creek Historical Society is a proactive organization that works with the local community and government to carry out its mission to preserve and interpret local history of Walnut Creek in Northern California. Building connections and pride, the Society welcomes support and participation of the community. Members of the Walnut Creek Historical Society receive a quarterly newsletter, announcements of special events, and a discount on items sold at the museum.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments Other Securities | $799,065 | $819,298 | ▲ $20,233 |
| Cash and Non-Interest-Bearing Accounts | $80,981 | $97,555 | ▲ $16,574 |
| Accounts Receivable | $17,797 | $87,031 | ▲ $69,234 |
| Inventories for Sale or Use | $23,530 | $11,987 | ▼ $11,543 |
| Prepaid Expenses and Deferred Charges | $1,000 | $1,000 | → $0 |
| 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 Program Related | - | $0 | - |
| Investments in Publicly Traded Securities | - | $0 | - |
| Land, Buildings, and Equipment, Net | - | $0 | - |
| Intangible Assets | - | $0 | - |
| Total Assets | $922,373 | $1,016,871 | ▲ $94,498 |
| Other Assets Total | - | $0 | - |
| Liabilities | |||
| Deferred Revenue | $15,340 | $84,185 | ▲ $68,845 |
| Other Liabilities | $4,391 | $20,522 | ▲ $16,131 |
| Accounts Payable and Accrued Expenses | $-7,681 | $7,778 | ▲ $15,459 |
| Total Liabilities | $12,050 | $112,485 | ▲ $100,435 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $910,323 | $904,386 | ▼ $5,937 |
| Total Net Assets Fund Balance | $910,323 | $904,386 | ▼ $5,937 |
| Total Liabilities and Net Assets / Fund Balance | $922,373 | $1,016,871 | ▲ $94,498 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Equipment | - | $7,640 | $7,640 |
| Name | Title |
|---|---|
| Andrea Baldacci | Co-President |
| Pamela O'Donnell | Co-President |
| Jeff Peterson | Director |
| Jim Roachelle | Director |
| Kristin Mendelson | Director |
| Lee Culver | Director |
| Mark Brown | Director |
| Priscilla Tudor | Director |
| Ted Dobbs | Director |
| Teresa Wenzel | Director |
| Anina Dalsin | Legal Advisor |
| Maggie Hughs | Secretary |
| Barton Tolley | Treasurer |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $142,555 |
| Other Expenses | $114,108 |
| Total Fundraising Expense | $29,855 |
| Grants and Similar Amounts Paid | $500 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $85,203 | $16,083 | $27,469 | $128,755 |
| Information Technology | $3,581 | $13,654 | - | $17,235 |
| Occupancy | $12,270 | $1,406 | - | $13,676 |
| Payroll Taxes | $7,402 | $1,397 | $2,386 | $11,185 |
| All Other Expenses | $5,624 | $3,349 | - | $8,973 |
| Insurance | - | $7,905 | - | $7,905 |
| Fees for Services Accounting | - | $3,714 | - | $3,714 |
| Other Expenses | $2,900 | $476 | - | $2,900 |
| Other Employee Benefits | - | $2,615 | - | $2,615 |
| Office Expenses | $315 | $2,070 | - | $2,385 |
| Fees for Services Other | - | $942 | - | $942 |
| Grants to Domestic Orgs | $500 | - | - | $500 |
| Advertising | - | $395 | - | $395 |
| Travel | $123 | $25 | - | $148 |
| Total Functional Expenses | $173,277 | $54,031 | $29,855 | $257,163 |
| Line Item | Amount |
|---|---|
| Fundraising Gross Income | $125,794 |
| Fundraising Direct Expenses | $90,692 |
| Gaming Gross Income | $581 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Holiday Faire | $97,806 | $97,806 | $80,263 | $17,543 |
| Oktoberfest | $11,906 | $10,906 | $1,219 | $9,687 |
| Total Events | $131,669 | $122,208 | $90,371 | $31,837 |
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Receivables from Disqualified Persons | - | $0 | - |
| Receivables from Officers, Directors, Trustees, and Key Employees | - | $0 | - |
| Liability | Amount |
|---|---|
| Deposits Held for Events | $18,385 |
| Payroll liability | $2,136 |
| Rounding | $1 |
“Form 990 is prepared by an outside tax professional. The form is then reviewed bythe organization's management. After a full review, the final version of the tax return is provided to all members of the organization's voting body. A representative of management authorizes the final form 990 which is then e-filed with the internal revenue service.”
“Members of the board of directors review all potential conflicts of interest periodically. All personnel and board members are required to disclose (inwriting) potential conflicts and any related party affiliations. Loans between theorganization and members of management and the board are strictly prohibited. Theorganization seeks full transparency on all relationships. Any potential conflicts (in fact or appearance) are discussed openly and resolved in accordance with the organization's policies and procedures.”
“Members of the board of directors review the compensation of the organization's employees periodically in accordance with irs rules and regulations. Efforts are made to secure compensation data from industry sources in order to determine competitiveness and appropriateness of salaries. Every effort is made to ensure that the process is thorough and transparent in accordance with irs guidelines and the organization's policies and procedures.”
“All of the organization's governing documents, financial statements and other legalfilings are maintained in a secure environment and held available for inspection bytax authorities and the general public. Tax returns are posted annually towww.guidestar.org (where they are available for viewing as electronic copies) and are also available for a physical inspection at the organization's office in walnut creek, california.”
“Adjustments to correct balances from prior year = -$35114”
“Walnut Creek Historical Society has marked the box that they have been using the cash method on the tax return previously. The organization uses accrual method accounting for their books, and the reporting on the tax return has been a partial accrual method, so we are correcting the box to show the correct accounting method. Multiple corrections have been made to the balance sheet accounts in the current year resulting in an adjustment for prior years.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | false |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | -7681 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 7778 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 17797 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 87031 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | The Walnut Creek Historical Society is a proactive organization that works with the local community and government to carry out its mission to preserve and interpret local history of Walnut Creek in Northern California. Building connections and pride, the Society welcomes support and participation of the community. Members of the Walnut Creek Historical Society receive a quarterly newsletter, announcements of special events, and a discount on items sold at the museum. |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 395 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 395 |
| IRS990/AllOtherContributionsAmt | 0 | 9045 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 3349 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 5624 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 8973 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | Jackie Byrd |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 9259357871 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 2660 YGNACIO VALLEY ROAD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | WALNUT CREEK |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94598 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 80981 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 97555 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 0 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | false |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/ContriRptFundraisingEventAmt | 0 | 9598 |
| IRS990/CostOfGoodsSoldAmt | 0 | 11543 |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 22745 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 500 |
| IRS990/CYInvestmentIncomeAmt | 0 | 21043 |
| IRS990/CYOtherExpensesAmt | 0 | 114108 |
| IRS990/CYOtherRevenueAmt | 0 | 24455 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 218906 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 29986 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 142555 |
| IRS990/CYTotalExpensesAmt | 0 | 257163 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 29855 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 287149 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 15340 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 84185 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 0 |
| IRS990/Desc | 0 | THE WALNUT CREEK HISTORICAL SOCIETY OPERATES THE SHADELANDS RANCH MUSEUM AND SUPPORTS THE EFFORTS OF THE COMMUNITY MEMBERS TO EXPAND THEIR UNDERSTANDING OF LOCAL HISTORY. THE MUSEUM IS ON THE NATIONAL REGISTER OF HISTORIC PLACES AND BELONGS TO THE CITY OF WALNUT CREEK. THE MUSEUM IS OPEN TO THE PUBLIC FOR TOURS AND ALSO HOUSES A RICH ARCHIVE OF CONTRA COSTA AND WALNUT CREEK HISTORY IN ITS COLLECTIONS OF OLD NEWSPAPERS, PHOTOGRAPHS AND GOVERNMENT RECORDS THAT IS MADE AVAILABLE TO THE PUBLIC FOR REASEARCH. THE HISTORICAL SOCIETY ALSO OFFERS WALKING TOURS OF DOWNTOWN HERITAGE SITES TO THE PUBLIC, RUNS EDUCATIONAL PROGRAMS FOR AREA ELEMENTARY SCHOOLS (ONSITE AT THE MUSEUM AS WELL AS THROUGH DOWNTOWN WALKING TOURS), HOLDS AN ANNUAL HOLIDAY FAIRE AND HOLIDAY TEAS, AND RENTS OUT THE GROUNDS OF THE MUSEUM FOR PRIVATE EVENTS. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | false |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 13 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 173277 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 3714 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 3714 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 942 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 942 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282FiledCnt | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 4 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 5 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 6 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 7 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 8 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 9 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 10 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 11 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 12 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 3.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 4.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | Andrea Baldacci |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Pamela O'Donnell |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Barton Tolley |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Maggie Hughs |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | Mark Brown |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | Lee Culver |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | Ted Dobbs |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | Kristin Mendelson |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | Jeff Peterson |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | Jim Roachelle |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | Priscilla Tudor |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | Teresa Wenzel |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | Anina Dalsin |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | Co-President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Co-President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Treasurer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | Secretary |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | Director |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | Legal Advisor |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 1967 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | true |
| IRS990/FundraisingAmt | 0 | 9598 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 90692 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 125794 |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GamingGrossIncomeAmt | 0 | 581 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 13 |
| IRS990/GrantAmt | 0 | 500 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 500 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 500 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 389384 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 315 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 13 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIInd | 0 | X |
| IRS990/InfoInScheduleOPartXInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 13654 |
| IRS990/InformationTechnologyGrp/ProgramServicesAmt | 0 | 3581 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 17235 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 7905 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 7905 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/TotalAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 23530 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 11987 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 21043 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 21043 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/BOYAmt | 0 | 799065 |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 819298 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 1 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 7640 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 0 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 7640 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LoanOutstandingInd | 0 | false |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembershipDuesAmt | 0 | 4102 |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | The Walnut Creek Historical Society is a proactive organization that works with the local community and government to carry out its mission to preserve and interpret local history of Walnut Creek in Northern California. Building connections and pride, the Society welcomes support and participation of the community. Members of the Walnut Creek Historical Society receive a quarterly newsletter, announcements of special events, and a discount on items sold at the museum. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 910323 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 904386 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 35102 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 35102 |
| IRS990/NetIncomeFromGamingGrp/ExclusionAmt | 0 | 581 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 581 |
| IRS990/NetIncomeOrLossGrp/ExclusionAmt | 0 | -11228 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | -11228 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | -809 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 910323 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 904386 |
| IRS990/NoListedPersonsCompensatedInd | 0 | X |
| IRS990/NoncashContributionsAmt | 0 | 1710 |
| IRS990/NondeductibleContributionsInd | 0 | true |
| IRS990/NondeductibleContriDisclInd | 0 | true |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 1406 |
| IRS990/OccupancyGrp/ProgramServicesAmt | 0 | 12270 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 13676 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 2070 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 315 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 2385 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 0 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | -35114 |
| IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt | 0 | 2615 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 2615 |
| IRS990/OtherExpensesGrp/Desc | 0 | Holiday Tea |
| IRS990/OtherExpensesGrp/Desc | 1 | Quickbooks Payments Fees |
| IRS990/OtherExpensesGrp/Desc | 2 | Direct Program Related Exp. |
| IRS990/OtherExpensesGrp/Desc | 3 | Printing and Publications |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 476 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 39572 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 10485 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 5302 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 2900 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 39572 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 10485 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 5778 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 2900 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 4391 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 20522 |
| IRS990/OtherRevenueTotalAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/FundraisingAmt | 0 | 27469 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 16083 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 85203 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 128755 |
| IRS990/OtherWebsiteInd | 0 | X |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PaymentsToAffiliatesGrp/TotalAmt | 0 | 0 |
| IRS990/PayPremiumsPrsnlBnftCntrctInd | 0 | false |
| IRS990/PayrollTaxesGrp/FundraisingAmt | 0 | 2386 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 1397 |
| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 7402 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 11185 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 1000 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 1000 |
| IRS990/PrincipalOfficerNm | 0 | Pamela O'Donnell |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 712110 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 1 | 712110 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 2 | 712110 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 3 | 712110 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 4 | 712110 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | Living History Program |
| IRS990/ProgramServiceRevenueGrp/Desc | 1 | Museum Admissions |
| IRS990/ProgramServiceRevenueGrp/Desc | 2 | Museum Operations |
| IRS990/ProgramServiceRevenueGrp/Desc | 3 | Teas |
| IRS990/ProgramServiceRevenueGrp/Desc | 4 | Wedding/Outdoor Fees |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 2500 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 1 | 1136 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 2 | 65435 |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 3 | 149835 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 2500 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 1 | 1136 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 2 | 65435 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 3 | 149835 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 42114 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 250 |
| IRS990/PYInvestmentIncomeAmt | 0 | 21867 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 53906 |
| IRS990/PYOtherRevenueAmt | 0 | 30871 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 107481 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 40276 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 107901 |
| IRS990/PYTotalExpensesAmt | 0 | 162057 |
| IRS990/PYTotalRevenueAmt | 0 | 202333 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvblFromDisqualifiedPrsnGrp/EOYAmt | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 29986 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | true |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 218906 |
| IRS990/RoyaltiesGrp/TotalAmt | 0 | 0 |
| IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 0 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 24210 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 42114 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 16309 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 38221 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 7100 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 127954 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 21043 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 21867 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 18996 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 15928 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 14426 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 92260 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 1050426 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.58100 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 0.47750 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 127954 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 0 |
| IRS990ScheduleA/TaxRevLeviedOrgnztnlBnft170Grp/TotalAmt | 0 | 0 |
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