ec204-Perimeter, slope and ditch check sediment control devices.pdf
PDF 343 KB Posted
- Attached to
- Davenport Tile Boring Replacement
- Solicitation number
- 645-RFB-1746-2025
- Issued by
- Scott County, Iowa
About this file
EC-204 Perimeter, Slope and Ditch Check Sediment Control Devices
This document is a Standard Road Plan specification sheet issued by the Iowa Department of Transportation (Iowa DOT) Design Methods Engineer, detailing installation requirements for sediment control devices used in perimeter protection, slope protection, and ditch protection applications. The specification addresses three primary sediment control device types: Perimeter and Slope Sediment Control Devices for general perimeter and slope applications, and Ditch Check Sediment Control Devices for installation in ditches. The devices utilize 3/4" x 3/4" minimum actual size wood stakes installed at varying angles and spacing depending on application type—downslope stakes at 4-foot maximum spacing for perimeter and slope applications and 2-foot maximum spacing for ditch applications, with upslope stakes spaced at device ends and middle locations. Installation specifications require staple fastening every 2 feet on the upslope side for perimeter and slope applications and every 1 foot for ditch applications. All installations require a minimum 12-inch ground contact length and overlap joints per Detail 'A', with provisions for fill and compaction of rills and gullies prior to device placement. The specification notes that devices are not intended for use in perennial or intermittent streams and may require additional run-ups or erosion reduction measures when placed on slopes to ensure proper runoff conveyance.
The document includes detailed installation diagrams across three sheets with sections addressing perimeter control along curbs and inlets, slope protection perpendicular to slope contours, and ditch protection installed perpendicular to ditch configurations. Installation length measurements are taken along the device itself, with run-ups included in total length calculations. Extra material required for overlap installation is not included in the installation length. The specification was revised on 10-19-21 with labeling changes on Sheet 3. Reference materials include links to the Iowa DOT Design Manual (01e-06.pdf), providing additional context and design guidance for sediment control applications on Iowa road projects.
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Text version
PERIMETER CONTROL
Contour Lines
LEGEND
Flow
INLET PERIMETER PROTECTION
PERIMETER CONTROL ALONG CURB
Wood Stake
(Overlap Joint)
DETAIL 'A'
Perimeter and Slope Sediment Control Device
INLET
45 typ.
Right of Way or Protected Area
Perimeter and Slope Sediment Control Device
See Detail 'A' (Typ.)
See Detail 'A' (Typ.)
See Detail 'A' (Typ.)
12" min.
2' min.
(measured along device)
Installation Length
DETAIL 'B'
See Detail 'A' (Typ.)
Control Device
Slope Sediment
Perimeter and incidental to Perimeter and Slope Sediment Control Device.
and compacting rills and gullies, and minor ground shaping, is
Control Device. Minor ground shaping may be required. Filling continuous contact with Perimeter and Slope Sediment
Ensure ground surface is smooth in order to provide placing Perimeter and Slope Sediment Control Device.
Fill and compact rills and gullies (see Detail 'B') prior to
Not intended for use in perennial or intermittent streams.
Sediment Control Device
Perimeter and Slope
Perimeter and Slope Sediment Control Device.
Fill and compact rills and gullies prior to placing
12" min.
8 Install staples every 2 feet on upslope side.
ground.
All stakes to be placed at approximatly 45 degree angle to minimum actual stake size 3/4" x 3/4" wood stakes.
Upslope stakes spaced at ends and middle of device. Use
Install downslope stakes at 4 foot maximum spacing.
included in the installation length.
Extra material required to install overlaps will not be installation length.
along the device. Run-ups will be included in the run-ups and/or means may be required to reduce erosion such that runoff is conveyed along the device, additional each run up the slope to help contain runoff. When placed
Overlap joints per Detail 'A'. Turn the lower 10 feet of
100-19
Possible Tabulation:
Ditch Check Sediment Control Device
Perimeter and Slope Sediment Control Device
Possible Contract Item:
EC-204
REVISION
10-19-21
SHEET 1 of 3
REVISIONS: Changed labeling on Sheet 3.
APPROVED BY DESIGN METHODS ENGINEER
STANDARD ROAD PLAN
SEDIMENT CONTROL DEVICES
PERIMETER, SLOPE AND DITCH CHECK
DESIGNER INFORMATION
https://www.iowadot.gov/design/dmanual/01e-06.pdf http://www.iowadot.gov/design/dmanual/01e-06.pdf
SLOPE PROTECTION
30 typ.
A
A
(measured along device)
Installation Length
Top of Slope or Undisturbed Area
Sediment Control Device
Perimeter and Slope
Sediment Control Device
Perimeter and Slope Filler Material
SECTION A-A
Installation
(Typ.)
See Detail 'A'
(Typ.)
See Detail 'A'
(Typ.)
See Detail 'A'
12" min.
Contour Lines
LEGEND
Flow
Wood Stake
12" min.
Install staples every 2 feet on upslope side.
length.
runaround. Run-ups will be included in the installation feet of each device up the slope to prevent flow contours). Overlap joints per Detail 'A'. Run the last 10
Install Slope Protection perpendicular to slope (parallel to staples every 2 feet on upslope side.
minimum actual stake size 3/4" x 3/4" wood stakes. Install
Upslope stakes spaced at ends and middle of device. Use
Install downslope stakes at 4 foot maximum spacing.
EC-204
REVISION
10-19-21
SHEET 2 of 3
REVISIONS: Changed labeling on Sheet 3.
APPROVED BY DESIGN METHODS ENGINEER
STANDARD ROAD PLAN
SEDIMENT CONTROL DEVICES
PERIMETER, SLOPE AND DITCH CHECK
DITCH PROTECTION
Foreslope
Ditch
Backslope
Control Device Ditch Check Sediment
Control Device Ditch Check Sediment
12" min.
INSTALLATION IN DITCH
(measured along device)
Installation Length
Contour Lines
LEGEND
Flow
Wood Stake
12" min.
Install staples every 1 foot on upslope side.
joints per Detail 'A'.
Install Ditch Protection perpendicular to ditch. Overlap minimum actual stake size 3/4" x 3/4" wood stakes.
Upslope stakes spaced at ends and middle of device. Use
Install downslope stakes at 2 foot maximum spacing.
EC-204
REVISION
10-19-21
SHEET 3 of 3
REVISIONS: Changed labeling on Sheet 3.
APPROVED BY DESIGN METHODS ENGINEER
STANDARD ROAD PLAN
SEDIMENT CONTROL DEVICES
PERIMETER, SLOPE AND DITCH CHECK
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