The image above shows a circular metal hatch set into the ground. It has two lids and is stamped with the words “JONES,” “NO 04,” and “SOMERVILLE, MASS.” The text asks for help identifying it. This is a common find in older residential areas, and there are several possible explanations for what it is.
What the Object Likely Is
Based on its appearance and markings, this object is most likely a coal hole cover or a utility access cover.
- Coal Hole Cover: In the 19th and early 20th centuries, coal was the primary fuel for heating homes. Coal holes were hatches built into sidewalks or patios that allowed coal delivery workers to pour coal directly into a basement bunker without entering the house . The cover is typically made of cast iron, about 12 to 14 inches in diameter, and often bears the name of the foundry that made it . The words “SOMERVILLE, MASS.” likely refer to the location of the foundry that cast the cover . The “NO 04” could be a model or batch number.
- Utility Access Cover: Alternatively, it could be a cover for a small underground utility space, such as a water valve, gas line, or electrical connection . These are often found near property boundaries or in yards .
Why It Has Two Lids
The design with two lids is a distinctive feature. It could be that the outer lid provides additional protection or insulation, while the inner lid seals the opening. It could also be a double-lid design for a specific type of access, such as a septic tank or a small vault .
What You Should Do
- Do Not Open It: Do not attempt to open the hatch yourself. It may cover a deep hole, a utility line, or a septic tank. Opening it could be dangerous.
- Contact Local Authorities: If you are curious about its purpose, contact your local public works department or a utility company. They can tell you if it is part of a public system or a private feature of the property.
- Check Property Records: Look at your property’s survey or title records. These documents may show the location of underground features like septic tanks or utility easements.
The Bottom Line
The metal hatch is likely an old coal hole cover or a utility access point. It is a piece of history from a time when homes relied on coal for heat. If you want to know for sure, the best course of action is to contact a local professional.
Have you ever found a similar object in your yard? Share your experience in the comments below.
