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E-005309LANDMARK CASE · HIGH CORROBORATIONDATE PRECISION: approximateRECORD COMPLETENESS: 100%

Ellsworth Delta-3 Diamond-Object / Power-Loss Incident

A week or two after Christmas 1978; Mills also described it as late December 1978 or early January 1979Ellsworth AFB Minuteman missile field, South Dakota, South Dakota, United States

John W. Mills III told Hastings that during an RMAD targeting procedure at Delta-3, a low-frequency hum and a large dark four-sided object were present over the site. The site, vehicle and radio then lost function; power later returned and the object was gone. Mills said another Echo targeting team described a similar event, while a wider 12–13 missile outage was learned second-hand.

// LINKED CLASSIFICATIONS:Nuclear & Defense Incursions(P-000102)→
// PROVENANCE COVERAGE

100% record completeness

This measures documentation coverage, not whether the encounter or its claims are true.

1 SOURCES · 0 PRIMARY
Date documented
A week or two after Christmas 1978; Mills also described it as late December 1978 or early January 1979
Location documented
Ellsworth AFB Minuteman missile field, South Dakota, South Dakota, United States
Map coordinates available
Coordinate precision: region.
Catalogue classification linked
1 family link(s), 1 case-specific component(s).
Published citation-backed claims
6 encounter-target claim(s), 1 component claim(s).
Source coverage
1 unique source edition(s); 0 marked primary for at least one claim.
Assessment has encounter-level provenance
6 encounter-target published claim(s) can carry assessment provenance.
This dossier currently depends on a single source edition; independent coverage would strengthen comparison.
No cited source is currently marked as primary for the published claims shown here.
// ASSESSMENT METADATA

Stored case-assessment fields

ENCOUNTER-CLAIM PROVENANCE PRESENT
Stored total witness estimate3
Stored verified-report count0
Instrumental evidence flagNO
Official investigation flagNO
// ENCOUNTER LOCATION · OPENSTREETMAP
COORDINATE PRECISION: REGION
Ellsworth Delta-3 Diamond-Object / Power-Loss Incident (A week or two after Christmas 1978; Mills also described it as late December 1978 or early January 1979): Evidence Dossier & Witness Reports | ANOMALY | ANOMALY UAP Archive & Controlled Vocabulary