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Section 38 – Sewer and Storm Drain Construction

the requirements of AWWA C900, or other high strength pipe approved by the Agency shall be

Service sewers entering a manhole shall be set to an invert to crown match with the

outgoing pipe, or internal drops conforming to Standard Drawing 7-3, except at the ends of cul-

de-sacs. Unless otherwise shown on or specified in the Contract, cleanouts shall be provided

for all service sewers that do not require a manhole at property or easement line. The cleanout

shall be installed three feet (3’) maximum back of the sidewalk or easement line if the service is

located within a side or back of lot easement. A concrete or PVC box shall be set to finish

grade of the property. The cleanout and service shall be of like material and diameter, and shall

be installed as shown on Standard Drawing 7-9 or 7-10, as required for the particular situation.

38-5.01 Service Sewer Relocations and Reconnections

Service sewer relocations and reconnections shall be constructed in conformance with

these Specifications and as directed by the Agency. Ductile iron sewer pipe or PVC Pressure

Class 200 (DR-14) pipe conforming to the requirements of AWWA C900 shall be used when the

minimum depth of cover of the reconnected or relocated service sewer is three feet (3’) or less

from the top of the finished subgrade, or if located beneath the drain pipe and the clearance

between the pipes is one-half foot (0.5’) or less. Details for service sewer relocations and

reconnections shall be as shown on Standard Drawing 7-13.

38-5.02 Connections to Existing Sewers

Where a new or relocated service sewer requires that a tap be made to an existing collector

or trunk sewer, such tap will be made by the Agency. An application for such tap shall be made

to the Agency, and the required fees paid, at least five (5) Working Days in advance of the date

the tap is desired. All excavation, shoring and bracing is the responsibility of the Contractor and

must be in conformance with all OSHA and other applicable safety standards. All shoring and

bracing shall be in place before Agency personnel will install the tap. Installation of the service

sewer shall be completed by the Contractor in accordance with these Specifications.

38-5.03 Connections to Manholes

Any service sewer entering a manhole shall be installed with the invert elevation of the

service pipe matching the crown elevation of the exit sewer except when an internal drop

connection is used. If the manhole at the end of a cul-de-sac is connected with a pre-cast base,

the invert of any service stubs shall be a minimum of one inch (1”) above the invert of the exit

pipe. Internal drop connections shall have a minimum length of three feet (3’) and be installed

using a drop bowl in accordance with Standard Drawing 7-3.

38-6 STORM DRAIN INLET LATERALS

Unless otherwise indicated on the Plans or in the Special Provisions, storm drain inlet

laterals shall be a minimum of twelve inches (12”) in diameter. Unless otherwise indicated in

the Contract, materials for inlet laterals shall conform to requirements of Section 50,

“Construction Materials”, of these Specifications for each respective type and class of pipe.

Connections of laterals to manholes and inlets shall be water and soil tight, and shall

conform to Section 39, "Manholes", and Section 27-13, "Drop Inlets and Catch Basins”, of these

All inlet laterals shall be inspected by lamping conforming to Section 38-10.05, "Lamping of

Storm Drain Inlet Laterals", in this Section of these Specifications or TVI. When the radius or

length of the lateral precludes the effective use of lamping methods, a TVI is required

conforming to Section 38-10.04, "Television Inspection (TVI)", in this Section of these

Specifications. Other proposed methods of inspection may be approved by the Agency.