I think it was West Germany?
Answer:
more than 9022 miles in active service.
Explanation:
The 1850s were a defining decade in American railroading as scattered systems became an organized and fluid interstate system. What began in the 1820s as local ventures, serving a specific purpose, had transformed into an indispensable transportation network by 1850. At that time there were a total of 9,022 miles in active service.
I don't think that there is an antonym for drift wood, yet there is a lot of synonyms.