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General Provisions (00100-00999)

588Construct skimmer dewatering devices in accordance with the dimensions in the Standard

DE · 2025 Standard SpecificationsBook pages 598–599View official source ↗

DEWATERING PRACTICES SECTION 906 in accordance with the dimensions in the Standard Construction Details and place at the locations shown in the contract.

2.Maintenance

Maintain the skimmer dewatering device in proper operational condition while required on the project.

3.Removal

Remove the skimmer dewatering device from the project site when directed by the engineer.

H.Well Point System

A typical well point system consists of a series of small diameter wells connected via a header pipe to the suction side of a suitable well point pump.

1.Construction

a.Design a well point system capable of controlling groundwater in order to install proposed

structures on a dry and stable sub -base. Select a location for installing the well point system that will not interfere with construction of the proposed structur e until removal is appropriate. If inclusion of the well point system in the work area requires modifications to construction phasing, include the modifications in the shop drawings.

b.Obtain and comply with all necessary permits in accordance with Section 902. Obtain permits

and provide copies to the engineer before beginning excavation.

c.Install and test the well point system in accordance with the approved design to demonstrate

the system's effectiveness to the engineer’s satisfaction before continuing with the excavation.

d.Modify the well point system if it cannot maintain the groundwater elevation required to

provide a dry and stable sub -base.

2.Maintenance

Maintain the well point system to ensure working order and continuous drawdown throughout the dewatering process.

3.Removal

a.Remove the well point system after placement of all proposed structures and backfill affected

by groundwater conditions, or as directed by the engineer.

b.Stabilize areas affected by the well point system, if needed, in accordance with Section 908.

906.4Method of Measurement.

A.The Department will measure the quantity of dewatering work completed and accepted as

follows:

1.Portable sediment tanks by each placed and accepted.

2.Dewatering bag by each placed and accepted.

3.Sump pit by each placed and accepted.

4.Skimmer dewatering device by each constructed, placed and accepted.

DEWATERING PRACTICES SECTION 906 589 B. The Department will not measure the well point system.

906.5Basis of Payment.

A.The Department will pay the quantities of dewatering practices at the contract unit prices for each

acceptably placed. The Department will pay for new dewatering bags using the unit cost of item 906002, dewatering bag. Price and payment constitute full compensation for:

1.Providing all materials;

2.fabricating;

3.excavating, backfill, and backfilling;

4.installing;

5.maintaining and sediment removal;

6.temporary stabilization;

7.relocating within project limits;

8.removal;

9.restoring the site; and

10.permanent stabilization.

B.The Department will pay the quantity of well point system as a lump sum . Price and payment will

constitute full compensation for:

1.Design;

2.Permits;

3.Installation;

4.Operation;

5.maintenance;

6.removal;

7.restoring the site; and

8.permanent stabilization.

C.The Department will consider re -design or modification of the well point system as incidental to

this item; ITEM DESCRIPTION UNIT 906001 PORTABLE SEDIMENT TANK EACH 906002 DEWATERING BAG EACH 906003 SUMP PIT EACH 906004 SKIMMER DEWATERING DEVICE EACH 90600 6 WELL POINT SYSTEM LS

Source: Delaware Standard Specifications for Road and Bridge Construction, 2025 Edition. Pages 598–599 of 779.

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90500 1 SILT FENCE LF

90600 2, dewatering bag. Price and payment constitute full compensation for: