Sewer maintenance equipment, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.

Sewage conveyance system - note extensive brickwork, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.

Sewer worker, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.

Water/sewage flowing through (shored) trench during construction, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.

Sewer maintenance equipment, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.

Illustration of the complexities of repairing a particular utility in amongst a maze of other utilities, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.

Complex array of utility pipes under street, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.

Sewer installation techniques/equipment, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.

Trench shoring techniques, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.

Office workers, Eastern Europe. Date unknown.

Source: Richard Beck, received from the private collection of Dr. Wolfgang Wagner, University of Berlin, Germany.