Question

the wall street journal. the fault line threatening dams. by jim carlton. june 24, 2017. fremont, calif. - the coastal mountains that frame this working - class city next to san francisco bay harbor a hidden menace: a reservoir 10 miles away that sits next to an active earthquake fault, which experts say could cause a dam break and flood thousands of homes. the potential threat is so severe, the owner of the calaveras reservoir decided to build a replacement dam. but seven years after that work began, the dam is unfinished and isnt expected to be complete until 2019 - four years behind schedule. the owner is prospecting the calaveras reservoir project show how skilled it can be to repair or replace an old dam, which is of growing concern. vocabulary activity. questions. what is the main idea of this text? a many dams in california are at a greater risk of breaking and flooding areas because they are located near active earthquake faults. for this reason, the calaveras dam in fremont, ca is being replaced with a new one that is better built. b thirty percent of the dams in the united states are rated as posing a high or significant hazard. many of these dams have bases formed from loose rock and soil, which could liquefy in a strong earthquake. c billions of dollars and inspection staffing is needed to repair and replace many damaged dams across the united states. many states do not have the funding or the resources for these big construction projects. d when many of the countrys dams were built, engineers didnt understand the extent of the damage earthquakes can cause them. since then, we have more information about how earthquakes can impact dams.

Explanation:

The text focuses on the risks dams in California face, especially from earthquake - related threats like the Calaveras Reservoir near an active fault and the potential for catastrophic flooding. It also mentions issues with dam repair, replacement, and funding. Overall, it emphasizes the danger to dams in California due to seismic activity.

Answer:

A. Many dams in California are at a greater risk of breaking and flooding because they are located near active earthquake faults.