ChicagoChicago's street raisingLifting a whole downtown with hand screws is a huge job. Was raising the buildings easier than digging them out, or was something already covering the old street?In the 1850s and 1860s central Chicago was raised to a new grade. Buildings were lifted on jackscrews, and in January 1858 a four-storey, 750-ton brick building at Randolph and Dearborn went up 6 ft 2 in.
Photo: AlejandroLinaresGarcia · CC BY-SA 3.0 · via Wikimedia Commons
Mud Flood · Mexico
Tula (Mesoamerican site)
The open question
Half a building now below ground. Was it built that way, or did the ground come up to meet it?
On the record
From 650 to 750, Tula Chico developed, and at its height spanned five to six km2, parts of which may be buried under Tula Grande.
- Kind
- sunk
Sources
More from Mud Flood
ChicagoChicago's street raisingLifting a whole downtown with hand screws is a huge job. Was raising the buildings easier than digging them out, or was something already covering the old street?In the 1850s and 1860s central Chicago was raised to a new grade. Buildings were lifted on jackscrews, and in January 1858 a four-storey, 750-ton brick building at Randolph and Dearborn went up 6 ft 2 in.
ChicagoTremont House hotel liftWhy lift a big brick hotel rather than just fill in around it?In 1861 Ely, Smith and Pullman lifted the Tremont House hotel six feet to meet the new street grade.
SeattleSeattle UndergroundA whole storey of shops ended up below the street. Why build new streets a floor up instead of on the old ones?After the 1889 fire, Pioneer Square's streets were raised from several feet to a full storey. The old sidewalks and shopfronts are still down there, lit by glass vault lights. The city condemned the Underground in 1907.
SeattlePioneer Building, SeattleIf the old ground floor is underground, which floor was really the first one?Built in Pioneer Square after the 1889 fire; Bill Speidel's Underground Tour has run from it since 1965.