You may download the DWG drawing into Auto CADD 2000 (or later) for your use/modification. If you are not familiar with DWG format, please utilize the PDF format for easier viewing capabilities. You can download each drawing individually below or view all four drawings in one PDF document.

Installation Guidelines of RECPs during Channel Applications

Step One:
Site Preparation - The first step in installation of RECPs in channels is site preparation. The site should be fine graded to a smooth profile and relatively free from all weeds, clods, stones, roots, sticks, rivulets, gullies, crusting and caking. Fill any voids and make sure the channel is compacted properly.

Step Two:
Seeding - Seed the area to be vegetated. Select a seed mix for vegetation adapted to the local geographical area. The seeding types may vary based on the water conditions expected immediately after installation. The types of seeds planted above the anticipated water line may different from the seed planted below the anticipated water line.

Step Three:
RECP Deployment in the Channel Bottom

RECP Deployment in the Channel Bottom #1
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RECP Deployment in the Channel Bottom #2
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The RECPs should be unrolled in the direction of water flow. First the RECP is deployed in the channel bottom. It is also necessary to prevent a seam from going down the center of the channel bottom or in areas of concentrated water flow.

When installing two RECPs side by side in a waterway the center of the RECP should be centered in the area of concentrated water flow. Install adjoining RECP’s away from the center of the channel bottom. If the manufacturer recommends overlapping the RECP, the overlap will generally be two to four inches. Continue to install a common row of staples at two-foot minimums along the length of the offset center overlap.

The RECP must be secured at the beginning of the channel. The anchoring method recommended in the Federal Highway Administration’s proposed FP-03 Specifications is a six-inch x six-inch check slot is dug perpendicular to the direction of water flow across the entire width of the channel. The RECP is laid in the check slot with 30 inches of the RECP extending upstream of the check slot. Stake or staple the RECP in the check slot on 12-inch centers. Backfill the anchor trench and compact the soil. Place seed over the compacted soil if necessary. Cover the compacted soil with the remaining 12 inches of the terminal end of the RECP. Staple or stake terminal end down slope of the anchor trench on 12-inch centers.

Step Four:
Check Slots

Check Slots
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Check slots are recommended in the Federal Highway Administration’s proposed FP-03 Specification to be placed perpendicular to the flow direction across the entire width of the channel at 25-foot intervals and at the terminal end of the channel.

The check slots placed at 25-foot intervals can be done in one of two ways. The check slots drawing shows the option of putting in a check slot six-inches wide x six-inches deep, secure RECP in the upstream side of the check slot with staples or stakes on 12-inch centers. Flip the RECP roll on the upstream edge. Back fill the check slot as shown in the RECP Deployment of the Side Slopes drawing and compact the soil. Continue rolling the RECP down stream over the completed check slot.

Step Five:
RECP Deployment on the Side Slopes

RECP Deployment of the Side Slopes
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Continue to roll the RECP along the channel bottom and side slopes in the direction of the water flow.

As the RECP is installed from the channel bottom up the slope a shingle type installation is recommended with the up-slope RECP overlapping the lower RECP approximately two inches to four inches

Anchor the RECPs with a minimum staple pattern of one staple every 24 inches across the width and one staple every 36 inches down its length.

If the RECP needs to be spliced, be sure the RECP is “shingled” with the up-stream RECP overlapping the down-stream RECP. There should be four inches of overlap in a splice. Use a staple check slot to secure the overlap.

Anchor the RECP placed at the top of the channel slope in the same manner as described in the slope section.

Step Six:
Terminal End - Secure the RECP at the terminal end of the channel with a check slot similar to the one made at the beginning of the channel.

View all four drawings in one PDF document.

For more information regarding RECPs and their effective useage, please contact the Erosion Control Technology Council. In addition, please also review the document regarding Guidelines for Installing Rolled Erosion Control Products in Slope and Channel Applications on the website for more detailed descriptions of the steps listed above.