Lamb Spring Archaeological Preserve
Public records show a registered, tax-exempt organization in good standing.
What it says it does
The corporation is organized exclusively for charitable, educational and scientific purposes including for such purposes the developing fund raising, building and operations of an on-site museum at the Lamb Spring Archaeological Preserve site. The Lamb Spring Board administers several tours per year for numerous attendees who reside in the Denver Metro area. Various scientific publications about Lamb Spring were published between 1960 and 2004 by Denver Museum of Nature and Science began a review of all artifact previously excavated from the site to determine radiocarbon dates of Megafauna remains. The Board is working with other scientists to promote additional studies.
- Income
- $4,654
- Spending
- $1,530
- Reserves
- Over 10 years of spending
- Largest source of income
- donations and private grants, 100%
Source: Form 990EZ for the year ending December 31, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate
Financial health
We do not score finances when yearly spending is very small or the return has too little detail. The ratios stop meaning much at that size.
Source: Form 990EZ for the year ending December 31, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate
Governance
This organization files the short tax form, which does not ask about boards, policies or audits. That is normal for a small charity and is not a mark against it.
Source: Form 990EZ for the year ending December 31, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate
Impact evidence
Describes programs. Its tax return describes what it does but we have found no measurable results in it.
Programs described in its return (1)
- The organization was able to provide a few site tours which generated some donations. We also received donations from Colorado Gives Day.
Source: Form 990EZ for the year ending December 31, 2025, filed with the Internal Revenue Service. Rating method 2026.2. How we rate
Legitimacy checks
Is it registered with the IRS? Passed.
Listed in the IRS master file of tax-exempt organizations as a 501(c)(3) charitable organization.
Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.
Has the IRS revoked its tax-exempt status? Passed.
Not on the IRS automatic revocation list.
Source: Automatic revocation of exemption list, Internal Revenue Service, file dated October 13, 2026.
Are donations tax-deductible? Passed.
On the IRS list of organizations eligible to receive tax-deductible contributions.
Source: Publication 78 data: organizations eligible for tax-deductible contributions, Internal Revenue Service, file dated October 13, 2026.
Is it keeping up with its IRS filings? Passed.
Most recent return on file covers the year ending December 2025.
Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.
How long has it been tax-exempt? Passed.
Recognized by the IRS since July 2007.
Source: Exempt Organizations Business Master File, Internal Revenue Service, file dated October 13, 2026.
Is it in good standing with state regulators? Passed.
Not on California's list of charities barred from soliciting. Other states are not yet checked.
Source: May Not Operate or Solicit for Charitable Purposes list, California Attorney General, Registry of Charities and Fundraisers, file dated October 21, 2026.
Ratings and checks are our reading of public records, using the published method. They are not a statement about anyone's honesty. If you work for this organization, you can send corrections or results, confirm you want gifts through Veridonate, or ask to be removed from giving.