DelDOT Standard Specifications Section 707: Riprap

707.1Description.

This work consists of riprap and channel bed fill construction.

707.2Materials.

A.Stone Section 1006

B.Bagged Riprap Section 1030

707.3Construction.

707.3.1 Pre-Sacked Concrete Riprap.

A.Protect pre-sacked concrete riprap from moisture using a waterproof covering if the contractor

does not place the riprap the same day of delivery. The Department will reject bags containing material that has begun to hydrate.

B.Follow the manufacturer’s recommendations for weather limitations.

C.Place geotextile in accordance with Section 708 and the contract.

D.Place pre-sacked riprap on slopes in accordance with the contract. Stagger the bagged riprap

joints, in a regular pattern. Tamp into place to conform the riprap bags to the prepared slope and to adjacent bags already placed. Remove and replace all ripped or torn bags.

E.Wet the installation with water to initiate the cement hydration process in accordance with the

manufacturer’s recommendations. Wet each new course of bagged riprap thoroughly before placing the next course when the contract requires multiple courses. Do not use a paper pre- sacked rip rap product for underwater applications.

F.In multi-level construction, ensure that each surface is clean before placing the next layer of bags.

Provide good bag-to-bag contact to ensure bonding in accordance with the manufacture’s recommendations. Do not disturb the placed bags until the concrete has sufficiently cured. 707.3.2 Stone Riprap.

A.Excavation within the riprap area template.

B.Prepare the bedding area.

1.Level placement area without voids or cavities.

2.Ensure the area is free from stones 2-inches or larger, vegetation, debris, and soft material.

3.Preparation of the area may include: clearing and grubbing, excavating, removing unsuitable

material, backfilling, and placing embankment.

C.Place geotextile in accordance with Section 708 and the contract.

D.Place the riprap carefully on the geotextile to produce an even distribution of pieces, with a

minimum of voids, and without tearing the geotextile. Place the riprap to the full-course thickness in a manner that prevents segregation of stone sizes and prevents displacement of underlying material. Arrange individual stones to ensure a uniform distribution.

707.3.3 Channel Bed Fill

A.Place channel bed fill to the dimensions and at the locations shown on the plans.

707.4Method of Measurement.

A.The Department will measure the quantity of pre-sacked concrete riprap as the number of cubic

yards of riprap placed and accepted.

B.The Department will measure the quantity of stone riprap as either the number of square yards,

cubic yards, or tons of riprap for each class placed and accepted. When the Department measures stone riprap by the square yard, the Department will determine the quantity by computations based on field measurements. The Department will take measurements along the completed finished surfaces, no horizontal projection, and the specified placement thickness for the class. When the Department measures stone riprap by the ton, the Department will determine weight in accordance with Section 109.1.

C.The Department will measure the quantity of channel bed fill as the number of cubic yards of

material placed and accepted.

707.5Basis of Payment.

A.The Department will pay for pre-sacked concrete riprap at the contract unit price per cubic yard.

The Department will pay for stone riprap at the contract unit price per square yard, cubic yard, or ton. Price and payment will constitute full compensation for:

1.Preparing the bedding areas, including excavation and backfilling;

2.providing and placing all materials; and

3.removing and replacing rejected bags.

B.The Department will pay for channel bed fill at the contract unit price per cubic yard. Price and

payment constitute full compensation for:

1.Providing and placing all materials;

2.salvaging and stockpiling;

3.hauling; and

4.removal and disposal of materials.

C.The Department will pay for geotextile in accordance with Section 708.

D.The Department will pay for excavation above the final top of riprap elevation with other

excavation items on the contract. ITEM DESCRIPTION UNIT 707001 RIPRAP, R-4 SY 707002 RIPRAP, R-5 SY 707003 RIPRAP, R-6 SY 707004 RIPRAP, R-7 SY 707005 RIPRAP, R-8 SY

707010 RIPRAP, R-4 CY 707011 RIPRAP, R-5 CY 707012 RIPRAP, R-6 CY 707013 RIPRAP, R-7 CY 707014 RIPRAP, R-8 CY 707015 RIPRAP, R-4 TON 707016 RIPRAP, R-5 TON 707017 RIPRAP, R-6 TON 707018 RIPRAP, R-7 TON 707019 RIPRAP, R-8 TON 707020 PRESACKED CONCRETE RIPRAP CY 707021 CHANNEL BED FILL CY

Referenced in this section

Sections that cite this one

RIPRAP in other states

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Source: Delaware Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 372–0 of 786. View official source ↗

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706 MONUMENT

708 GEOTEXTILES

707RIPRAP

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