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![The level line was run around bends, through tunnels, and over trestles cgs02449.jpg The level line was run around bends, through tunnels, and over trestles](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs02449.jpg?itok=KO1VnNyt)
Description
The level line was run around bends, through tunnels, and over trestles.The latter two are particularly dangerous and difficult for leveling operations. (Image credit: Collection of NOAA/NOS/National Geodetic Survey William H. Burger Album)
Credit
Collection of NOAA/NOS/National Geodetic Survey William H. Burger Album
Display Date
1900
Collection
Historic Coast & Geodetic Survey
Keywords
Coast and Geodetic Survey