CESSWI Part 2 NEW 2025/ 2026 Update)
Questions & Answers | Grade A| 100%
Correct (Verified Solutions)
Existing Veg, Desc/Purp - answer-:temp or perm bmp desi to stab soil and remove sups part
from sheet flow runoff.
Outlet Velocity Protection desc/purp - answer-:temporary or permanent, structural BMP
designed to prevent scour at stormwater outlets and to minimize the potential for downstream
erosion through velocity dissipation. The most common types are rip-rap aprons, scour holes,
and energy dissipater blocks/walls but configurations utilizing turf reinforcement mats or other
appropriate materials may be used.
Outlet Velocity Protection objectives - answer-:Runoff Control
Erosion Control
Post-Construction Management
Outlet Velocity Protection applications - answer-:Pipe outlets
Culverts
Receiving channels
Outlet Velocity Protection inspection - answer-:Inspect according to regulatory timetables
Damage to the geotextile underlay, if used
,Scour or erosion under or around the BMP
Sediment, trash or vegetative accumulation
Animal activity burrow
Damage to the outlet protection itself such as movement or degradation of stone
Outlet Velocity Protection maintenance - answer-:When used, maintain the structural integrity
of the geotextile underlining
Maintain the material used in the BMP; rip-rap, concrete channel, turf reinforcement mat, etc.
Maintain the soil under and around the outlet protection
Make sure outlet protection is installed according to the Plan/SWPPP and continually
maintained
Pipe Slope Drain desc/purp - answer-:structural BMPs that use piping material
to convey flow down a slope without causing erosion damage to the slope.
These devices may be installed above or below ground.
Pipe Slope Drain objectives - answer-:Runoff Control
Erosion Control
Pipe Slope Drain applications - answer-:Disturbed slopes before permanent stabilization is
achieved or stormwater management/conveyance structures are installed
To convey concentrated runoff
Pipe Slope Drain inspection - answer-:Signs of erosion at inlet or outlet of drain
Outlet protection
Damage to pipe materials
Separation of adjoining pipe sections
,Secure anchoring of drain materials
Proper outlet protection (rip-rap, sediment trap, etc.)
Material blockage of pipes
Animal activity
Pipe Slope Drain maintenance - answer-:Repair damage to structural materials of drain, when
needed
Ensure slope drains are securely anchored
Maintain outlets with outlet protection:
Velocity dissipater
Sediment trap or basin
Repair damaged and separated pipes
Rip-Rap desc/purp - answer-:structural BMP utilizing large, coarse, angular rock, frequently
underlain with filter fabric, designed to:
Protect soil from areas of concentrated flow such as channels or ditches
Stabilize slopes experiencing soil or seepage difficulties
Increase infiltration
Dissipate run-off velocity
Rip-Rap objectives - answer-:Runoff Control
Erosion Control
Post-Construction Management
Rip-Rap application - answer-:Riparian (water-course banks) areas where approved
Areas with sparse vegetative cover
Slopes, swales, and spillways
, Road Construction
Culvert outlets
Areas experiencing high velocities and/or volume flow conditions
Rip-Rap inspection - answer-:Correct size and shape of aggregate
The use and serviceability of filter cloth, where applicable
Bare spots created by aggregate movement
Insure rock is evenly spread
Erosion under rip-rap
Sediment, trash and debris accumulation on and between rocks
Rip-Rap maintenance - answer-:Maintain the rip-rap area for :
Rock slipping or slumping
Signs of seepage
Maintain the edges of the rip-rap area, as they are prone to erode
quickly
Ensure integrity of filter fabric, with no tears or other visible defects
Maintain proper depth of rip-rap
Rock Check Dam desc/purp - answer-:structural BMP designed to capture sediment in
stormwater runoff and slow the velocity of that stormwater to prevent further
site erosion.
Rock Check Dam objectives - answer-:Runoff Control
Erosion Control
Sediment Control
Questions & Answers | Grade A| 100%
Correct (Verified Solutions)
Existing Veg, Desc/Purp - answer-:temp or perm bmp desi to stab soil and remove sups part
from sheet flow runoff.
Outlet Velocity Protection desc/purp - answer-:temporary or permanent, structural BMP
designed to prevent scour at stormwater outlets and to minimize the potential for downstream
erosion through velocity dissipation. The most common types are rip-rap aprons, scour holes,
and energy dissipater blocks/walls but configurations utilizing turf reinforcement mats or other
appropriate materials may be used.
Outlet Velocity Protection objectives - answer-:Runoff Control
Erosion Control
Post-Construction Management
Outlet Velocity Protection applications - answer-:Pipe outlets
Culverts
Receiving channels
Outlet Velocity Protection inspection - answer-:Inspect according to regulatory timetables
Damage to the geotextile underlay, if used
,Scour or erosion under or around the BMP
Sediment, trash or vegetative accumulation
Animal activity burrow
Damage to the outlet protection itself such as movement or degradation of stone
Outlet Velocity Protection maintenance - answer-:When used, maintain the structural integrity
of the geotextile underlining
Maintain the material used in the BMP; rip-rap, concrete channel, turf reinforcement mat, etc.
Maintain the soil under and around the outlet protection
Make sure outlet protection is installed according to the Plan/SWPPP and continually
maintained
Pipe Slope Drain desc/purp - answer-:structural BMPs that use piping material
to convey flow down a slope without causing erosion damage to the slope.
These devices may be installed above or below ground.
Pipe Slope Drain objectives - answer-:Runoff Control
Erosion Control
Pipe Slope Drain applications - answer-:Disturbed slopes before permanent stabilization is
achieved or stormwater management/conveyance structures are installed
To convey concentrated runoff
Pipe Slope Drain inspection - answer-:Signs of erosion at inlet or outlet of drain
Outlet protection
Damage to pipe materials
Separation of adjoining pipe sections
,Secure anchoring of drain materials
Proper outlet protection (rip-rap, sediment trap, etc.)
Material blockage of pipes
Animal activity
Pipe Slope Drain maintenance - answer-:Repair damage to structural materials of drain, when
needed
Ensure slope drains are securely anchored
Maintain outlets with outlet protection:
Velocity dissipater
Sediment trap or basin
Repair damaged and separated pipes
Rip-Rap desc/purp - answer-:structural BMP utilizing large, coarse, angular rock, frequently
underlain with filter fabric, designed to:
Protect soil from areas of concentrated flow such as channels or ditches
Stabilize slopes experiencing soil or seepage difficulties
Increase infiltration
Dissipate run-off velocity
Rip-Rap objectives - answer-:Runoff Control
Erosion Control
Post-Construction Management
Rip-Rap application - answer-:Riparian (water-course banks) areas where approved
Areas with sparse vegetative cover
Slopes, swales, and spillways
, Road Construction
Culvert outlets
Areas experiencing high velocities and/or volume flow conditions
Rip-Rap inspection - answer-:Correct size and shape of aggregate
The use and serviceability of filter cloth, where applicable
Bare spots created by aggregate movement
Insure rock is evenly spread
Erosion under rip-rap
Sediment, trash and debris accumulation on and between rocks
Rip-Rap maintenance - answer-:Maintain the rip-rap area for :
Rock slipping or slumping
Signs of seepage
Maintain the edges of the rip-rap area, as they are prone to erode
quickly
Ensure integrity of filter fabric, with no tears or other visible defects
Maintain proper depth of rip-rap
Rock Check Dam desc/purp - answer-:structural BMP designed to capture sediment in
stormwater runoff and slow the velocity of that stormwater to prevent further
site erosion.
Rock Check Dam objectives - answer-:Runoff Control
Erosion Control
Sediment Control
