707016 RIPRAP, R -5 TON

DE · 2025 Standard SpecificationsBook pages 376–377View official source ↗

GEOTEXTILES SECTION 708 366 SECTION 708 — GEOTEXTILES

708.1Description.

This work consists of furnishing and placing geotextiles.

708.2Materials.

Geotextile Section 1060

708.3Construction.

A.Place the geotextile on a prepared base area in a loose, unstretched condition.

B.Join the adjacent fabric edges with a lock -type or chain -type stitch, folded seam, or overlap

adjacent swaths of fabric a minimum of 12 -inches.

C.Overlap the material from upstream over downstream and from upslope over downslope.

D.Anchor the fabric in place using securing pins or other acceptable methods. Do not leave the

fabric uncovered for more than 2 -weeks.

708.4Method of Measurement.

The Department will measure the quantity of geotextile as the number of square yards for each type of geotextile placed and accepted. The Department will determine the quantity by computations based on field measurements taken along the outside perimeter o f the area covered by the geotextile.

708.5Basis of Payment.

The Department will pay the quantity of geotextile at the contract unit price per square yard. Price and payment will constitute full compensation for providing and placing all materials. ITEM DESCRIPTION UNIT 708001 GEOTEXTILES, STABILIZATION SY 708002 GEOTEXTILES, SEPARATION SY 708003 GEOTEXTILES, RIPRAP SY UNDERDRAINS SECTION 709 367 SECTION 709 — UNDERDRAINS

709.1Description.

This work consists of furnishing and constructing underdrains.

709.2Materials.

A.Borrow, Type C Section 1001

B.Stone, Delaware No. 57 Section 1004

C.Polyethylene Pipe Section 1031

1.AASHTO Class 2 Perforation Pattern

D.Geotextile Section 1060

E.Delineator OM-2-2V Blue Reflector

F.PCC Section 1022

G.Sign Post Section 1072

H.Rodent screen Galvanized steel screen - 1/2-inch by 1/2 -inch mesh and

0.063 -inch diameter galvanized steel wires.

709.3Construction.

A.Place the pipe in accordance with the contract and the Standard Construction Details. Make

lateral connections to the pipe with connectors recommended by the manufacturer.

B.Backfill perforated pipe underdrain trench with stone backfill in 6 -inch lifts and consolidate to the

satisfaction of the engineer.

C.Backfill underdrain outlet pipe trenches and outlet structures in accordance with Section 207.3.D .

Use Borrow, Type C material at least 1 -foot over the underdrain outlet pipe. The contractor may use excavated material for backfill above any of the Borrow, Type C in areas outside of the roadway and shoulders, provided that the excavated material meets Borrow, Type F.

D.Video the entire underdrain system before placement of the final layer of roadway pavement

material. If placing guardrail within 3 -feet of the underdrain, video that section of the underdrain after guardrail installation.

E.Install the outfall delineator in accordance with contract documents.

709.4Method of Measurement .

709.4.1 Perforated Pipe. The Department will measure the quantity of perforated pipe underdrains from end -to-end as the linear feet of pipe completed and accepted. 709.4.2 Underdrain Outlet Pipe. The Department will measure the quantity of underdrain outlet pipe from end -to-end as the linear feet of pipe completed and accepted.

Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 376–377 of 779.

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70700 1 RIPRAP, R -4 SY

70800 1 GEOTEXTILES, STABILIZATION SY