A former Southern Nevada civil engineer says a routine inspection inside underground storm tunnels near Las Vegas led to an encounter he still struggles to explain. The account, shared publicly through social media, describes unexplained objects, unusual footprints, and a brief sighting of a small humanoid figure inside restricted drainage tunnels connected to an unnamed dam near the Colorado region.
The man, identified only as John, worked for years inspecting flood control infrastructure, including drainage galleries, stormwater tunnels, and service corridors. While he was familiar with the challenges and risks of underground work, he says one experience stood out from everything else he encountered on the job.
Background
John worked as a civil engineer, technician, and inspector in Southern Nevada. His responsibilities included walking long stretches of stormwater tunnels to check for leaks, structural damage, or water seepage. According to John, much of the work was repetitive and uneventful.
He was also aware of stories involving people living in Las Vegas drainage systems and had personally seen makeshift camps during past inspections. However, he said he did not believe claims involving occult activity or conspiracy theories related to underground spaces. He described those ideas as common urban legends found in cities with large underground infrastructure.
That view changed after a series of observations during inspections at an unnamed dam site.
Tunnels
John said the drainage galleries at the site extended into long, narrow tunnels with pipes mounted along the ceilings and walls. Some areas were modern and well lit, while others appeared outdated and largely unchanged since the mid-20th century.
During a routine inspection, John noticed a small pile of metal objects on the tunnel floor. The items included a bent spoon, metal rings, old coins, heavy bolts, and a cracked pocket watch. At the time, he assumed another worker had gathered the items for removal.
Days later, he encountered the same pile again, but in a different location. Over time, the pile continued to reappear in various low-traffic sections of the tunnel system. Each time, John said, the collection appeared slightly larger.
Other inspectors reportedly noticed similar piles in separate areas. No one claimed responsibility for collecting them, and no formal explanation was provided.
Footprints
The repeated sightings eventually led John to look more closely at the area. In one section of tunnel with muddy flooring, he noticed small footprints near one of the metal piles. He described them as having five toes and a visible heel, resembling a human foot but measuring only about four inches in length.
John followed the tracks until they ended at a narrow trench roughly eight inches wide. He said the space appeared too small for anything larger than a small animal.
When John reported the footprints to a supervisor, he was told they were likely raccoon tracks. John said the explanation did not fully align with what he observed but did not pursue the issue further at the time.
Encounter
Some time later, during another inspection, John turned a corner and found the largest pile of metal he had seen yet. According to his account, the items were arranged in a near-perfect circle.
After calling out to coworkers and receiving no response, John noticed a narrow gap in the tunnel wall, approximately three feet tall. When he shined his flashlight into the opening, he said he saw a pale figure about three feet high with thin arms and a disproportionately large head.
John said the figure moved quickly, scraping against the tunnel surfaces before disappearing. He described the movement as similar to an insect navigating a tight space. After the sound stopped, the tunnel fell silent.
John attempted to follow but found only a dead end and a smaller drainage pipe that he believed the figure could not have entered.
Message
After returning to the circular pile of metal, John noticed faded lettering painted on the tunnel wall. The message read, “Don’t leave tools.”
John later asked an older coworker about the writing. The coworker said the message had been there since before he began working at the site in the 1980s. He also mentioned that tools had historically gone missing in that area without explanation.
After
John eventually left the job and no longer works in tunnel inspection. He says he would prefer to believe there is a logical explanation for what he witnessed but has not been able to reach a conclusion that fully accounts for the repeated metal piles, footprints, and the brief sighting.
He maintains that whatever he encountered did not appear to be human.
FAQs
Who is John in this account?
A former civil engineer who inspected tunnels in Southern Nevada.
Where did the incident occur?
In stormwater tunnels near an unnamed dam close to Colorado.
What objects were found in the tunnels?
Piles of metal items like coins, tools, and a pocket watch.
Did others see the metal piles too?
Yes, other inspectors reported finding similar piles.
Was an explanation ever confirmed?
No official explanation was provided.
