Hello,
The following photograph from
http://www.107thengineers.org/Histor...orldWarII.html
shows a bulldozer modified to be able to carry a concreting skip on the blade. Something I had not seen before.
It comes from the above website which contains a very good description of the projects undertaken by the US 107th Engineer Battalion.
There are several pictures of cranes etc.
Regards
Nick Balmer