Skip to main content

The timeline can be navigated by dragging the pointer on the timeline bar, located at the bottom of the screen on the desktop version and on the left of the screen on mobile. To filter by a specific topic, make a selection on the dropdown “Filters” menu or click “Search” to do a keyword search. To learn more, click “Read More” below.

Read More
Black and white photo of a river, lined with rocks, wooden sliding gates, and trees.
Crib dam in Lake Fork Canal, Utah

Settler-colonists in the north begin to build dams, increasing impact of malaria.

1776

EPD
COL
Crib dam in Lake Fork Canal, Utah

Building dams on rivers and streams to increase irrigation and water access also creates breeding grounds for mosquitos. By the end of the century, communities around milldams experience escalating bouts of malaria.