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From PDHengineer. com-Decatur Professional Development, LLC
Ensuring That Structures Built on Fill Are Reasonably Safe From Flooding
...ed or exceeded in any given year (also referred to as the 100-year flood or Base Flood). When permitted under applicable Federal, state, and local laws, ordinances, and regulations, earthen fill is sometimes placed in an SFHA to reduce flood risk to the filled area. Under certain conditions, when engineered earthen fill is placed within an SFHA to raise the surface of the ground to or above
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Drainage Design Truly Understand What Year Event Really Means
...illustrate important considerations. One such is that the 100-year event has only a 63 chance of happening in 100 consecutive years yet can occur more than once in a single year. Three other primary expressions are 'probability', 'service level', and 'expected occurrence'. There is a direct relationship between these terms and 'year event'. All are important to
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