Table:
text: List of steamboats on the Columbia River
Early Oregon Steam Navigation Company boats
Table 4: Early 
 O.S.N. Monopoly 
 boats
Name_ Type_ Year_Built Where_Built Initial_Owners
Mountain Buck side 1857 Portland Ruckle & Olmstead
Hassaloe stern 1858 Cascades, Washington Bradford Bros.
Carrie Ladd stern 1858 Oregon City Jacob Kamm & John C. Ainsworth
Julia(Barclay) stern 1858 Port Blakely Oregon Steam Navigation Co.
Wasco stern 1858 Port Blakeley Oregon Steam Navigation Co.

Question: From the list of steamboats on the Columbia River, where was anything built before 1858?

Question: What was built under the list of steamboats on the Columbia River in 1857?

Question: In the list of steamships on the Columbia River, who were the first owners of Wasco in 1858?

Question: What type of boat was built at Port Blakeley in the list of steamboats on the Columbia River?