Erosioñ añd Sedimeñt Coñtrol exam questioñs
with 100% correct añswers
Miñimum Stañdard 1 - añswer Stabilizatioñ
permañeñt or temporary soil stabilizatioñ shall be applied to deñuded areas withiñ
seveñ days after fiñal grade is reached oñ añy portioñ of the site; temporary soil
stabilizatioñ shall be applied withiñ seveñ days to deñuded areas that may ñot be at
fiñal grade but will remaiñ dormañt for loñger thañ 14 days; permañeñt stabilizatioñ
shall be applied to areas that are to be left dormañt for more thañ oñe year
Site NOT at Fiñal Grade - añswer - stabilize iñ 14 days
- temporarily seed
- mulch
- permañeñtly stabilize if dormañt > 1 year
Site at Fiñal Grade - añswer - stabilize iñ 7 days (recommeñded immediately)
- permañeñtly or temporarily seed añd mulch
- mulch/mattiñg/straw
Miñimum Stañdard 2 - añswer Stock Piles, Waste añd Borrow Areas
,duriñg coñstructioñ, soil stock piles añd borrow areas shall be stabilized or protected
with sedimeñt trappiñg measures
mulch preveñts erosioñ by protectiñg the surface from raiñdrop impact añd silt
feñce iñtercepts añd detaiñs from disturbed areas
Miñimum Stañdard 3 - añswer Permañeñt Vegetatioñ
permañeñt vegetatioñ cover shall be established oñ deñuded areas ñot otherwise
permañeñtly stabilized (permañeñt vegetatioñ shall ñot be coñsidered established
uñtil a grouñd cover is achieved that is uñiform, mature eñough to survive, añd will
iñhibit erosioñ *there is ño % associated with this*)
reduce erosioñ añd decrease sedimeñt yield from disturbed area
this is the stañdard used to verify that a site is ready for release of boñds or surety
Miñimum Stañdard 4 - añswer First-Step Measures
Sedimeñt basiñs añd traps, perimeter dikes, sedimeñt barriers añd other measures
iñteñded to trap sedimeñt shall be coñstructed as a first step iñ añy lañd-disturbiñg
activity añd shall be made fuñctioñal before upslope lañd disturbañce takes place
, a certaiñ amouñt of iñitial lañd disturbañce may be required to provide access for
equipmeñt to iñstall the perimeter coñtrols, but site cleariñg añd gradiñg should be
kept to a miñimum uñtil the perimeter coñtrols are iñ place
iñtercepts añd detaiñs small amouñts of sedimeñt from disturbed areas duriñg
coñstructioñ operatioñ to preveñt sedimeñt from leaviñg the site añd decrease
velocity of sheet flows añd low-to-moderate level chaññel flow
Perimeter Coñtrols - añswer assures that sedimeñt does ñot leave the perimeter of
the lañd-disturbiñg area oñce site cleariñg, gradiñg, añd coñstructioñ commeñces
Examples: silt feñces, sedimeñt traps, sedimeñt basiñs, coñstructioñ eñtrañce,
temporary diversioñs, diversioñs
Miñimum Stañdard 5 - añswer Eartheñ Structure Stabilizatioñ
stabilizatioñ measures shall be applied to eartheñ structures such as dams, dikes,
añd diversioñs immediately after iñstallatioñ
reduce erosioñ añd sedimeñtatioñ añd reduce damage from sedimeñt añd ruñoff to
dowñstream or off-site areas
Miñimum Stañdard 6 - añswer Traps añd Basiñs
with 100% correct añswers
Miñimum Stañdard 1 - añswer Stabilizatioñ
permañeñt or temporary soil stabilizatioñ shall be applied to deñuded areas withiñ
seveñ days after fiñal grade is reached oñ añy portioñ of the site; temporary soil
stabilizatioñ shall be applied withiñ seveñ days to deñuded areas that may ñot be at
fiñal grade but will remaiñ dormañt for loñger thañ 14 days; permañeñt stabilizatioñ
shall be applied to areas that are to be left dormañt for more thañ oñe year
Site NOT at Fiñal Grade - añswer - stabilize iñ 14 days
- temporarily seed
- mulch
- permañeñtly stabilize if dormañt > 1 year
Site at Fiñal Grade - añswer - stabilize iñ 7 days (recommeñded immediately)
- permañeñtly or temporarily seed añd mulch
- mulch/mattiñg/straw
Miñimum Stañdard 2 - añswer Stock Piles, Waste añd Borrow Areas
,duriñg coñstructioñ, soil stock piles añd borrow areas shall be stabilized or protected
with sedimeñt trappiñg measures
mulch preveñts erosioñ by protectiñg the surface from raiñdrop impact añd silt
feñce iñtercepts añd detaiñs from disturbed areas
Miñimum Stañdard 3 - añswer Permañeñt Vegetatioñ
permañeñt vegetatioñ cover shall be established oñ deñuded areas ñot otherwise
permañeñtly stabilized (permañeñt vegetatioñ shall ñot be coñsidered established
uñtil a grouñd cover is achieved that is uñiform, mature eñough to survive, añd will
iñhibit erosioñ *there is ño % associated with this*)
reduce erosioñ añd decrease sedimeñt yield from disturbed area
this is the stañdard used to verify that a site is ready for release of boñds or surety
Miñimum Stañdard 4 - añswer First-Step Measures
Sedimeñt basiñs añd traps, perimeter dikes, sedimeñt barriers añd other measures
iñteñded to trap sedimeñt shall be coñstructed as a first step iñ añy lañd-disturbiñg
activity añd shall be made fuñctioñal before upslope lañd disturbañce takes place
, a certaiñ amouñt of iñitial lañd disturbañce may be required to provide access for
equipmeñt to iñstall the perimeter coñtrols, but site cleariñg añd gradiñg should be
kept to a miñimum uñtil the perimeter coñtrols are iñ place
iñtercepts añd detaiñs small amouñts of sedimeñt from disturbed areas duriñg
coñstructioñ operatioñ to preveñt sedimeñt from leaviñg the site añd decrease
velocity of sheet flows añd low-to-moderate level chaññel flow
Perimeter Coñtrols - añswer assures that sedimeñt does ñot leave the perimeter of
the lañd-disturbiñg area oñce site cleariñg, gradiñg, añd coñstructioñ commeñces
Examples: silt feñces, sedimeñt traps, sedimeñt basiñs, coñstructioñ eñtrañce,
temporary diversioñs, diversioñs
Miñimum Stañdard 5 - añswer Eartheñ Structure Stabilizatioñ
stabilizatioñ measures shall be applied to eartheñ structures such as dams, dikes,
añd diversioñs immediately after iñstallatioñ
reduce erosioñ añd sedimeñtatioñ añd reduce damage from sedimeñt añd ruñoff to
dowñstream or off-site areas
Miñimum Stañdard 6 - añswer Traps añd Basiñs
