| Access hatches (8) |
|
|
| Street openings for underground work |
Newsday |
20 Sep 2021 |
| Street's accesses to sewer systems |
Newsday |
03 Aug 2021 |
| Sewer system entrances |
Universal |
02 Aug 2020 |
| Channel ports offering entry for underground workers |
The Telegraph Toughie |
14 Nov 2019 |
| Spooner's Chinese spies showing means to go underground |
|
|
| Openings for utility workers |
USA Today |
20 Feb 2019 |
| Openings for utility workers |
|
|
| Main entrances? |
New York Times |
02 Jun 2018 |
| Street openings |
Thomas Joseph |
12 Mar 2018 |
| Main entrances? |
|
|
| Sewer system entry points |
LA Times Daily |
05 Apr 2016 |
| Sewer system entry points |
|
|
| Entrances for Ed Norton |
|
|
| Ways to get under the street |
|
|
| Ways to get under the street |
|
|
| Accesses to the underground |
|
|
| Street entrances |
|
|
| Street entrances |
|
|
| Sewer entries |
|
|
| Sewer entries |
|
|
| Drain accesses |
|
|
| Ground-level openings |
|
|
| They may be uncovered on a street |
|
|
| What Ed Norton uncovered |
|
|