FDOT Drainage and Stormwater Management 3

Question 1

What is the minimum required freeboard above the 100-year flood elevation for FDOT roadway design?

Accepted Answer

1 foot

Answer

0 feet — roadway can be at 100-year elevation

Answer

2 feet

Answer

3 feet

Question 2

What Manning's roughness coefficient (n) does FDOT typically use for smooth concrete pipe in hydraulic calculations?

Accepted Answer

0.012

Answer

0.010

Answer

0.015

Answer

0.024

Question 3

According to FDOT specifications, what is the maximum joint gap allowed between sections of reinforced concrete pipe during installation?

Accepted Answer

1 inch

Answer

0.5 inch

Answer

0.75 inch

Answer

1.5 inches

Question 4

What is the primary purpose of a detention pond (versus a retention pond) in FDOT stormwater design?

Accepted Answer

Temporarily store excess runoff and release it at a controlled rate

Answer

Permanently store water indefinitely

Answer

Treat water through biological processes only

Answer

Infiltrate 100% of runoff into groundwater

Question 5

What FDOT standard index drawing covers inlet types and dimensions for stormwater collection?

Accepted Answer

Index 425

Answer

Index 201

Answer

Index 232

Answer

Index 601

Question 6

In FDOT drainage design, what does the rational formula variable 'C' represent?

Accepted Answer

Runoff coefficient based on land use

Answer

Catchment area in acres

Answer

Rainfall intensity in inches per hour

Answer

Time of concentration in minutes