TEMPORARY ENVIRONMENTAL CONTROLS
PART 1 GENERAL
1.1SECTION INCLUDES
A.Temporary environmental controls to control erosion and prevent
sediment laden runoff from leaving the construction site and areas under the Contractor’s control.
1.2RELATED SECTIONS
A.Section 02075: Geotextiles
1.3REFERENCES
A.AASHTO M 288: Geotextile Specifications for Highway Applications
B.AASHTO Construction Stormwater Field Guide
C.ASTM D 4355: Deterioration of Geotextiles by Exposure to Light, Moisture
and Heat in a Xenon Arc Type Apparatus
D.ASTM D 4491: Water Permeability of Geotextiles by Permittivity
E.ASTM D 4751: Determining Apparent Opening Size of a Geotextile
F.Utah Pollutant Discharge Elimination System, Utah Construction General
Permit (CGP) and UDOT Municipal Separate Storm Sewer System (MS4) Permit
1.4DEFINITIONS
A.Check Dam – A fiber roll or stone structure placed across a roadside ditch
to temporarily protect ditch from channel erosion by slowing velocity of stormwater runoff and intercepting and trapping sediment.
B.Disturbed Area – Areas within a construction site where existing
vegetative cover, or existing stabilized areas, have been removed or altered and exposed soils are susceptible to increased erosion and sedimentation.
Temporary Environmental Controls
C.Drop-Inlet Barrier – A barrier placed around a storm drain inlet grate,
situated outside of roadway pavement condition, that is designed to intercept and trap sediment-laden runoff before entering the storm drain system.
D.Fiber Roll – Wood excelsior, rice or wheat straw or coconut fibers rolled or
bound with netting to form a tube-like structure used to intercept and trap sediment.
E.Final Stabilization – Procedures and controls completed as the final
measure to protect disturbed areas of a construction site from erosion and sedimentation until vegetation regrowth occurs to provide ultimate erosion protection.
1.Includes work within areas to be vegetated such as establishing
final grades, placing topsoil, incorporating seed; roughening slopes by walking track-mounted equipment up and down slopes; applying rolled and hydraulic erosion control products; and installing other landscape treatments to protect exposed soils from erosion.
2.Includes work within areas intended to remain unvegetated such as
placing final pavement; installing stone, gravel and other stable material that will prevent erosion of underlying soil.
F.Gutter-Inlet Barrier – A device designed and prefabricated to secure to the
top, envelop or hang below a storm drain inlet grate, situated within roadway pavement condition, that keeps sediment and debris from entering the storm drain system.
G.Pipe-Inlet Barrier – A barrier placed at a pipe inlet that intercepts and traps
sediment before entering the pipe.
H.Sediment Trap – A small temporary excavated basin installed at low
points on a construction site designed to trap sediment-laden runoff to allow sediment to settle out before leaving site.
I.Silt Fence – A geotextile fabric fence used to intercept and trap sediment
in a sheet flow situation, along the perimeter of a disturbed area.
J.Slope Drain – A polyethylene pipe temporarily placed on a slope to collect
and transport storm runoff down the face of a slope until permanent drainage facilities are installed or vegetation growth is adequate.
K.Stabilized Construction Entrance – A layer of stone, underlined with a
geotextile fabric, placed at a construction site entrance or exit used to reduce the amount of sediment or mud tracked onto adjacent paved roadways by vehicles leaving the construction site.
Temporary Environmental Controls
L.Fiber Roll or Straw Bale Barrier – Temporary barriers installed by securing
fiber rolls or straw bales end to end along perimeter of a disturbed area designed to intercept and slow sediment laden runoff before it leaves a construction site.
M.Temporary Berm – A ridge of compacted soil with or without a shallow
ditch that diverts stormwater runoff from a slope to a controlled release point.
N.Temporary Environmental Fence – A high-visibility fence barrier used to
delineate and prevent encroachment on sensitive areas.
1.5SUBMITTALS
A.APL Compliance Form for information required for the following products:
1.Fiber Roll
2.Silt Fence
3.Gutter-Inlet Barrier
PART 2 PRODUCTS
2.1TEMPORARY ENVIROMENTAL CONTROLS
A.Fiber Roll
1.Diameter (minimum weight per linear foot)
a.18 inch (3 lb per linear foot)
b.12 inch (2 lb per linear foot)
c.9 inch (1 lb per linear foot)
2.Functional Longevity – 24 months minimum (includes netting
material).
3.Matrix material – Wood excelsior, rice or wheat straw, and coconut
fibers (coir) or in combination.
a.Material must be weed free.
4.Netting – UV stabilized synthetic or coir material, with 1 inch
maximum opening size, secured at end for matrix containment.
5.Wood Stakes
a.18 inch Fiber Roll – ¾ inches and 1½ inches by 3 feet
minimum dimensions.
b.12 inch Fiber Roll – ¾ inches and 1½ inches by 18 inch
minimum dimensions.
c.9 inch Fiber Roll – ¾ inches and 1½ inches 18 inch minimum
dimensions.
Temporary Environmental Controls
B.Silt Fence. Refer to EN Series Standard Drawings.
1.Silt Fence Fabric – 3 foot minimum width, conforming to Table 7 of
AASHTO M 288.
2.Wood Post – 1½ inches by 1½ inches by 4 feet minimum
dimensions.
3.Fasteners – Staples, wire, cable ties, or nails sufficient to maintain
fabric attachment to post.
C.Check Dam. Refer to EN Series Standard Drawings
1.Fiber Roll – 12 inch diameter, or
2.Stone – Angular, well-graded 2 to 6 inch diameter.
D.Drop-Inlet Barrier. Refer to EN Series Standard Drawings
1.Fiber Roll – 18 inch diameter, or
2.Silt Fence
a.Wooden Support Frame – 2 by 4 inch (nominal) wood studs.
E.Gutter-Inlet Barrier
1.Apparent Opening Size (ASTM D 4751) – between 20 and 40
sieve.
2.UV Resistance (ASTM D 4355) – 65percent minimum.
3.Flow Rate (ASTM D 4491) – 100 gpm/ft2 minimum.
4.Filter Material – Monofilament, woven or nonwoven geotextile.
5.Provide protection to entire inlet opening.
6.Types:
a.Above Inlet Grate
1) Mount securely to the top side of the inlet grate at each corner with cable ties, wire or similar.
b.Inlet Cover Grate
1) Sewn geotextile fabric that envelopes entire inlet grate. 2) Must have built-in lifting straps or other device to allow removal of inlet grate and barrier.
c.Below Inlet Grate
1) Mount device securely to the inlet grate or have independent frame that allows geotextile bag to hang below grate to capture runoff. 2) Must be designed with a bypass feature that allows stormwater to be conveyed into the conveyance system when geotextile is filled to capacity. 3) Must be able to remove from storm drain inlet and maintain device without dumping captured sediment into the storm drain system.
Temporary Environmental Controls
F.Pipe-Inlet Barrier. Refer to EN Series Standard Drawings.
1.Fiber Roll – 18 inch diameter, or
2.Stone – Angular, well-graded 2 to 6 inch diameter.
G.Temporary Berm. Refer to EN Series Standard Drawings.
1.Compacted existing soil.
2.Free of debris, such as trees, brush, obstructions and other
objectionable material that will not allow for compaction of berm material.
H.Temporary Environmental Fence
1.Fence Fabric
a.Polyethylene, high-density (HDPE) and UV stabilized
b.Height – 4 ft minimum
c.Color – Orange
2.Posts
a.Wood Post – 1½ inches by 1½ inches by 4 feet minimum
dimensions.
b.Fasteners – Staples, wire, cable ties or nails sufficient to
maintain fabric attachment to post.
I.Sediment Trap. Refer to EN Series Standard Drawings.
1.Stone – Angular, well-graded 6 to 12 inch diameter
J.Slope Drain. Refer to EN Series Standard Drawings.
1.12 inch diameter single wall polyethylene pipe
2.Polyethylene pipe end section
3.Stone – Angular, well-graded 6 to 12 inch diameter
4.Wood Stakes – 1½ inches by 1½ inches by 3 feet minimum
dimensions.
K.Stabilized Construction Entrance. Refer to EN Series Standard Drawings.
1.Stone – Crushed aggregate, well-graded 2 to 3 inch diameter.
2.Geotextile Fabric (Separation) – Refer to Section 02075.
L.Fiber Roll Barrier. Refer to EN Series Standard Drawings.
1.Fiber Roll – 18 inch diameter.
M.Straw Bale Barrier. Refer to EN Series Standard Drawings.
1.Straw Bales – Certified weed free straw bales by the Utah
Department of Agriculture.
2.Wood Stakes – 1½ inches by 1½ inches by 4 feet minimum
dimensions.
Temporary Environmental Controls
PART 3 EXECUTION
3.1INSTALLATION
A.Install appropriate controls as shown before beginning earth disturbing
activities.
B.Refer to installation procedures outlined in EN Series Standard Drawings
and the AASHTO Construction Stormwater Field Guide.
C.Install temporary environmental fence in the required locations before
construction activities begin.
1.Install posts at a 12 ft maximum spacing so the fence does not sag
more than 2 inches between posts.
2.Weave the fence over the support posts alternating every two loops
and secure it to the posts with fasteners.
D.Install Gutter-Inlet Barrier according to manufacturer’s recommendations.
3.2INSPECTION
A.Check installed controls before and after each rain event to verify proper
working function and compliance with the CGP.
B.Replace controls that are not properly working to prevent erosion and
sedimentation.
3.3MAINTENANCE
A.Maintain controls to function properly until surrounding disturbed areas
have met final stabilization measures.
B.Remove accumulated sediments from controls when depth reaches 50
percent of the control height or when it interferes with the performance of the control.
C.Properly dispose of accumulated sediment.
Temporary Environmental Controls
3.4REMOVAL
A.Remove temporary environmental controls when surrounding disturbed
areas have met final stabilization measures, except as follows:
1.Do not remove perimeter controls, such as silt fence, fiber rolls or
straw bales, when they protect a wetland or waterway unless the surrounding area meets final stabilization requirements identified within the CGP. 2 When the Engineer determines that controls should remain in place.
B.Remove temporary environmental fence and posts upon completion of
construction.
END OF SECTION
Temporary Environmental Controls
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Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 198–204 of 1,331.
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