magazine notes-exam 2 - Holland Tunnel 1927 Seeking to...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Holland Tunnel 1927 Seeking to build a tunnel under the Hudson River. Looked to Clifford M. Holland. What to do? o Considered building bridge Too costly Would have to be high enough to accommodate ships Tunnel would be less exposed to adverse weather 1919- work begins Would the longest underwater automobile tunnel in the world 2 parallel tubes w/ lengths of 8,371 ft and 8,558 ft Problem w/ vehicular tunnel o Gas emissions Long tunnel would need proper ventilation Harmful fumes would fill the tunnel o Solution Launched research program to determine: Amount of exhaust Composition Effects on people Mechanical ventilation system 4 ventilation buildings o 2→NY o 2→NJ o House 84 fans Each 80 ft in diameter Half of fans blow fresh air from outside into tunnel o Through duct beneath the road Other half pulls air and exhaust up and out o Through vents in the ceiling Air exchanged every 90 minutes Construction begins in 1920 o Shield-driving method o Begins from both ends o Construction area filled with compressed air To prevent water from entering the excavation site o Lined with cast iron rings o 2 tunnel tubes Each carry 2 lanes of traffic Measured 19.5 ft in diameter Largest in the U.S at time of construction
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
o Holland Died Tunnel renamed in his memory o Opened Nov. 27, 1927 Cost of $48 million 9 million used tunnel in its first year Chesapeake Bay Bridge-Tunnel
Background image of page 2
1964 Desire to connect Norfolk, Virginia and Wilmington, Delaware 1960- a commission sold $200 million in bonds to fund project Construction began on September 7, 1960. b/c no money available for design work (until bonds were sold)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 8

magazine notes-exam 2 - Holland Tunnel 1927 Seeking to...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online