Turn one manhole cover into an infrastructure lesson

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Sidequest: Turn one manhole cover into an infrastructure lesson.

Research the symbols and agencies visible on a supplied street fixture, then explain the system it belongs to without suggesting access.

What I can provide: Fixture photo, city.
Please deliver: An annotated infrastructure explainer.

Ask only for missing information that materially changes the result. Otherwise, state reasonable assumptions and keep the scope manageable. Use reliable sources and link them. Verify time-sensitive details such as hours, prices, access rules, and availability when relevant. If you cannot verify a detail, label it clearly and give me a way to check it. Use only the material I provide or explicitly authorize you to access; flag missing or unreadable details. If a required tool or source is unavailable, ask me for the relevant material or explain the limitation. Return a draft or plan for review; do not send messages, make bookings or purchases, or change my files or accounts unless I separately ask.

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