FDOT Drainage and Stormwater Management 2

Question 1

What is the minimum pipe cover required under FDOT traveled roadways for storm drain pipes?

Accepted Answer

18 inches

Answer

12 inches

Answer

24 inches

Answer

36 inches

Question 2

According to FDOT standards, what is the minimum slope required for storm drain laterals to maintain self-cleaning velocity?

Accepted Answer

0.30%

Answer

0.10%

Answer

0.20%

Answer

0.50%

Question 3

What is the function of a mitered end section (MES) on a culvert pipe?

Accepted Answer

Transition the pipe end to match the slope of the fill embankment

Answer

Control flow velocity at the outlet

Answer

Filter sediment before discharge

Answer

Prevent wildlife from entering the pipe

Question 4

Under FDOT specifications, what bedding material is typically required for reinforced concrete pipe in Type II bedding?

Accepted Answer

Coarse sand or granular material

Answer

Native soil compacted to 95% Proctor

Answer

Flowable fill

Answer

Crushed stone No. 57

Question 5

What FDOT environmental permit is typically required for stormwater management systems discharging to state waters?

Accepted Answer

Environmental Resource Permit (ERP)

Answer

National Pollutant Discharge Elimination System (NPDES) Permit only

Answer

Coastal Construction Control Line (CCCL) Permit

Answer

U.S. Army Corps Section 404 Permit only

Question 6

What is a 'french drain' as used in FDOT highway drainage design?

Accepted Answer

A perforated pipe in a gravel-filled trench for subsurface drainage

Answer

A trench drain with a metal grate

Answer

An outfall structure draining to a French Creek tributary

Answer

A roadside swale with specific geometry