SWM DEQ (ACTUAL 2026/2027) EXAM QUESTIONS WITH
VERIFIED CORRECT ANSWERS GRADED A+
Difference between level 1 and level 2 permeable pavement -
-
--Answers----for level 1, UD is required
How many design scales are there fore infiltration practices?
-
---Answers --- 3
For check dams in dry swale, what is the max check
dam height? - ---Answers 12"
What is the filter layer in the dry swale? - ---Answers----3"
of pea gravel
Difference in swale slopes for wet swale level 1 and level 2 -
-
--Answers----level 1 swale slopes less than 2%, level 2
swale slopes less than 1%
Difference between level 1 and level 2 filtering practices - -
-- Answers----level 1 is a one cell design and level 2 is a
two cell design
If an E&SC practice is going to be converted to a permanent
BMP, how should the elevations compare? - ---Answers----
BMP elevation should be lower
,How long does it generally take to fully establish a vegetated
roof? - ---Answers----12 to 18 months
Erosion and sediment control measures should be used
when the soil compost amended area is what size? - ---
Answers---
-2,500 ft^2 or more
For an earthen embankment, trees must be planted how
far beyond the embankment? - ---Answers 25'
Can vegetated emergency spillways be built into fill? - -
-- Answers----No, has to be armored if built into fill
What percent of the constructed wetland surface must be
high marsh? - ---Answers 70%
For a wet pond, the bottom of the inlet pipe should be -
--- Answers----even with the permanent pool's water
level
For a wet pond, the max slope of the safety bench is -
--- Answers 5%
If you are converting an E&SC practice to a permanent wet
pond BMP, when should you install the permanent riser? - -
-- Answers----During construction
, Difference between lift sizes for general earthen embankment
and portion around pipe - ---Answers----lift sizes for general
are 8", around the pipe are 4"
What are the dimensions for the cutoff trench associated with
the earthen embankment? - ---Answers----Min width is 4',
depth should be at least 4', side slopes should be 1:1 or
flatter
For earthen embankment, during the backfilling operation,
equipment should not be driven closer - ---Answers -- than
4', as measured horizontally, to any part of the structure
Principal spillway is the PRIMARY OUTLET and should handle
what frequency storms - ---Answers----typically 10 year and
25 year
If the emergency spillway cannot be cut into existing ground
or cut, it must be - ---Answers----armored (cannot just be
vegetated)
Accumulated sediment should be removed from the sediment
forebay every - ---Answers----3 to 5 years or when 6 to
12" have accumulated
A violation of the construction gp is a violation of the - -
-- Answers----stormwater management act
VERIFIED CORRECT ANSWERS GRADED A+
Difference between level 1 and level 2 permeable pavement -
-
--Answers----for level 1, UD is required
How many design scales are there fore infiltration practices?
-
---Answers --- 3
For check dams in dry swale, what is the max check
dam height? - ---Answers 12"
What is the filter layer in the dry swale? - ---Answers----3"
of pea gravel
Difference in swale slopes for wet swale level 1 and level 2 -
-
--Answers----level 1 swale slopes less than 2%, level 2
swale slopes less than 1%
Difference between level 1 and level 2 filtering practices - -
-- Answers----level 1 is a one cell design and level 2 is a
two cell design
If an E&SC practice is going to be converted to a permanent
BMP, how should the elevations compare? - ---Answers----
BMP elevation should be lower
,How long does it generally take to fully establish a vegetated
roof? - ---Answers----12 to 18 months
Erosion and sediment control measures should be used
when the soil compost amended area is what size? - ---
Answers---
-2,500 ft^2 or more
For an earthen embankment, trees must be planted how
far beyond the embankment? - ---Answers 25'
Can vegetated emergency spillways be built into fill? - -
-- Answers----No, has to be armored if built into fill
What percent of the constructed wetland surface must be
high marsh? - ---Answers 70%
For a wet pond, the bottom of the inlet pipe should be -
--- Answers----even with the permanent pool's water
level
For a wet pond, the max slope of the safety bench is -
--- Answers 5%
If you are converting an E&SC practice to a permanent wet
pond BMP, when should you install the permanent riser? - -
-- Answers----During construction
, Difference between lift sizes for general earthen embankment
and portion around pipe - ---Answers----lift sizes for general
are 8", around the pipe are 4"
What are the dimensions for the cutoff trench associated with
the earthen embankment? - ---Answers----Min width is 4',
depth should be at least 4', side slopes should be 1:1 or
flatter
For earthen embankment, during the backfilling operation,
equipment should not be driven closer - ---Answers -- than
4', as measured horizontally, to any part of the structure
Principal spillway is the PRIMARY OUTLET and should handle
what frequency storms - ---Answers----typically 10 year and
25 year
If the emergency spillway cannot be cut into existing ground
or cut, it must be - ---Answers----armored (cannot just be
vegetated)
Accumulated sediment should be removed from the sediment
forebay every - ---Answers----3 to 5 years or when 6 to
12" have accumulated
A violation of the construction gp is a violation of the - -
-- Answers----stormwater management act
