who is the chief engineer on the project?
Clifford Milburn Holland
Holland Tunnel
It was renamed the "Holland Tunnel" in memory of Clifford Milburn Holland, the chief engineer, following his sudden death in 1924 before the tunnel was opened. 
what does the holland tunnel look like underwater UNANSWERABLE what is this tunnel? It is a vehicular tunnel under the Hudson River is this tunnel built to connect cities? Yes, Lower Manhattan with Jersey City does the river flow through these aforementioned cities? Yes are there any other tunnels build under this river? Yes, Lincoln Tunnel who are the operating authority for the tunnel mentioned at the beginning? Port Authority of New York and New Jersey (PANYNJ) when was the aforementioned authority established? 1921 does the tunnel (mentioned at the beginning) consists of tubes? Yes, a pair of tubes
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Holland Tunnel [SEP] Introduction
However, disagreements prolonged the planning process until 1919, when it was decided to build a tunnel under the river. Construction of the Holland Tunnel started in 1920, and it opened in 1927. At the time of its opening, the Holland Tunnel was the longest continuous underwater vehicular tunnel in the world. The Holland Tunnel was originally known as the Hudson River Vehicular Tunnel or the Canal Street Tunnel. It was renamed the "Holland Tunnel" in memory of Clifford Milburn Holland, the chief engineer, following his sudden death in 1924 before the tunnel was opened. The Holland Tunnel was the world's first mechanically ventilated tunnel; the ventilation system was designed by Ole Singstad, who oversaw the tunnel's completion.