Case File · Vehicle Interference · Maryland

The Loch Raven Dam Incident

Two men approach a glowing egg-shaped object hovering over a bridge. Their engine dies. The headlights and dashboard go dark. Then the object flashes, the men feel heat on their faces, and it climbs straight up into the night.

26 October 1958Loch Raven ReservoirProject Blue Book case 6148
View from the old Paper Mill Road Bridge at Loch Raven Reservoir
Loch Raven Reservoir from the old Paper Mill Road Bridge — Famartin / Wikimedia Commons. Authentic location context, not an image from the 1958 encounter.
Witnesses
Phillip Small and Alvin Cohen
Reported object
Large, flattened egg-shaped luminous form
Vehicle effect
Engine, headlights and dash reportedly failed together
Official status
Blue Book unresolved / insufficiently explained
The case in one minute

A classic close encounter where the car becomes part of the evidence.

Late on 26 October 1958, Phillip Small and Alvin Cohen were driving near Loch Raven Reservoir north of Baltimore when they saw a large luminous object hovering above a bridge.

They slowed and continued toward it.

According to the statement later preserved by NICAP and Air Force investigators, when they reached roughly 75 to 80 feet from the bridge their car's electrical system failed at once. The engine stopped. The headlights went out. The dashboard lights died. Attempts to restart the car produced nothing.

Then the men got out of the vehicle and hid behind it.

For another 30 to 45 seconds, they watched the object hang above the bridge. It then emitted an intense white flash accompanied by a loud rumble or explosion-like sound. Both men said they felt heat on their faces.

The object rose vertically, became brighter and increasingly indistinct around its edges, and disappeared within seconds.

After it left, the car started normally.

The encounter

From distant glow to dead electrical system.

~22:30
Object over the bridge

Small and Cohen see a large, flat, egg-shaped luminous object hovering above the bridge at Loch Raven Reservoir.

Approach
They slow to investigate

The men deliberately continue closer rather than turning away.

~75–80 ft from bridge
The car dies

Engine, headlights and dashboard reportedly fail simultaneously. Attempts to restart produce no response.

Next 30–45 sec
They watch from behind the car

The object remains visible and apparently stationary above the bridge.

Departure
Flash, heat and loud sound

A brilliant white flash is followed or accompanied by a loud dull explosion or thunder-like sound; both men report heat on their faces.

Seconds later
Vertical climb

The object rises quickly and disappears within roughly five to ten seconds.

Afterward
The car restarts

Once the object is gone, the vehicle reportedly operates normally again.

The vehicle effect

The electrical failure is the strongest claim — and the one most worth separating from later legend.

The witnesses did not simply say the engine stalled.

They described a broader electrical shutdown: motor, headlights and dashboard lights all went dead together. In their telling, the effect began as they approached the hovering object and ended after it departed.

That temporal pattern is why the case became a classic electromagnetic-interference example in UFO literature.

But the surviving public record does not currently provide a detailed mechanical inspection proving what failed inside the vehicle. No component test, wiring report, battery measurement or independent diagnostic record is in hand.

So the correct statement is that the witnesses reported a total electrical failure closely coincident with the object — not that an unknown field was instrumentally demonstrated.

The heat effect

Both men said the flash was physically felt.

Small and Cohen reported a wave of heat across their faces when the object flashed. Later accounts describe a burning sensation or reddening of exposed skin.

They were reportedly examined at St. Joseph's Hospital after the event. Later scientific and UFO literature, including J. Allen Hynek and James McDonald, cited Loch Raven as a case involving mild skin effects.

The medical evidence remains limited. The available record does not provide a modern-style clinical report establishing a specific radiation dose or mechanism.

The physiological claim is therefore stronger than a retrospective anecdote, but weaker than a documented exposure measurement.

Immediate reporting

The story entered official channels quickly.

After the object disappeared, the men drove away and tried to contact the Ground Observer Corps before calling Towson police.

Police officers responded to the reservoir area. The officers reportedly found nothing unusual at the scene by the time they arrived.

This rapid report matters. It reduces the possibility that the core story was invented years later after exposure to UFO literature.

It does not independently verify the object, but it anchors the basic encounter to the night itself.

Project Blue Book

The Air Force did not produce a confident ordinary explanation.

The Loch Raven event entered Project Blue Book as case 6148.

Later Blue Book summaries list the case among unresolved or insufficiently explained reports. Modern archival indexing identifies a surviving case file in National Archives material.

That status should not be inflated into “the Air Force confirmed a UFO.” It means investigators did not settle the report on a conventional identification from the material available to them.

The object description

Large, low, luminous — but still estimated by eye.

ShapeFlattened egg or broad ovoid.
AppearanceDim or iridescent white before the final bright flash.
AltitudeEstimated roughly 100–150 ft above the bridge.
SizeLater summaries commonly place it around 100 ft long.
MotionStationary hover followed by vertical climb.
Measurement caveatAll range, size and altitude values are witness estimates, not instrumented readings.
Other reports that night

NICAP cited additional local reports — but they need their own source chains.

NICAP later stated that independent reports of an egg-shaped object were received from the wider area on the same night.

That could matter if the reports were genuinely independent, contemporaneous and geometrically compatible with the Loch Raven event.

But secondary references to “other witnesses” should not simply be counted as confirmed corroboration. Each report needs a name, time, location, direction and first-publication trail.

Until those are recovered, Small and Cohen remain the evidential core.

Conventional explanations

What could reproduce both the sighting and the car failure?

That is harder than explaining either piece alone.

A bright astronomical object, aircraft or helicopter might account for a light in the sky but does not naturally explain a simultaneous loss of engine, headlights and dashboard followed by normal restart.

A vehicle electrical fault could explain the car but not the structured luminous object, flash and reported heat.

Misremembered distance, coincidental mechanical trouble, atmospheric effects or nearby aviation remain legitimate possibilities. None has yet been shown to reproduce the complete sequence convincingly.

The missing vehicle inspection is therefore crucial. It is the bridge between a strange sighting and a true electromagnetic-interference case.

What remains

This case can still be strengthened with primary documents.

  • Recover the complete Project Blue Book case 6148 file in page order.
  • Recover the original signed witness statements from Small and Cohen.
  • Recover the police incident/reporting record and identify responding officers.
  • Recover any St. Joseph's Hospital examination record or physician notes.
  • Identify the exact vehicle and determine whether any mechanical inspection was documented.
  • Recover NICAP interview notes and any photographs/sketches made during the investigation.
  • Trace the claimed independent same-night witnesses one by one.
  • Reconstruct weather, aviation traffic and local lighting around Loch Raven at 10:30 p.m.
  • Test whether a plausible ordinary electrical fault could produce the exact reported shutdown/restart sequence.
Reader test

How much weight should a car that “comes back to life” carry?

  • Does simultaneous loss of engine, dash and headlights materially strengthen the sighting?
  • How much does the lack of a detailed mechanical report weaken it?
  • Would an original hospital note confirming facial reddening change your view?
  • Does Blue Book's inability to identify the case matter?
  • And what ordinary explanation best fits the object, the electrical failure, the flash and the heat as one sequence?
Source room

Follow the encounter back to the 1958 investigation

NICAP — Loch Raven Dam detailed case report
Near-contemporary reconstruction preserving witness chronology, vehicle effects and departure sequence.
NICAP — Loch Raven case directory
Source hub for Blue Book/NICAP references and later research.
Project Blue Book archival index — N of Baltimore, October 1958
Modern access point identifying the surviving NARA case file and official summary.
WYPR — Maryland local-history retrospective
Regional public-media source for local chronology and historical context.
UAP Globe — Loch Raven Dam Incident
Modern synthesis and source-navigation layer.