21. Construction workers find them now and then during excavation work . 22. In 2008-11 he undertook survey and excavation work in the Kherlen Valley in Mongolia. 23. The excavation work proceeded in three shifts per day, involving blasting through hard rock. 24. During excavation works in 1993 for the adjoining presidential castle. 25. Excavation works continue at a daily rate of with a total of 150 personnel.26. Groundbreaking occurred in August 1963, and major excavation work was complete by May 1964. 27. These were examined in 1935, 1939 and 1982 when excavation work for wiring began. 28. Excavation work began in May 2003, four months after the Hraneks'daughter, Clara, was born.29. Excavation work at Chichen Itza did not begin until the 1923 24 field season.30. During the excavation work of the 1870s, Bernard documents the discovery of many artefacts.
