SECTION 714
CULVERTS, STORM DRAINS, EDGEDRAINS,
AND UNDERDRAINS
714.01 DESCRIPTION
This work consists of installing culverts, storm drains, edgedrains, and underdrains.
714.02 EQUIPMENT
Reserved
714.03 MATERIALS
A. Culverts and Storm Drains
Item
Concrete Culvert and Storm Drain Pipe
Reinforced Concrete Culvert and Storm Drain Pipe
Metallic (Zinc or Aluminum Coated Corrugated
Steel Culverts, Underdrains, and Storm Drains
Smooth Wall Steel Pipe Culverts
Polymer Coated Corrugated Steel Pipe
Corrugated Polyethylene Culverts
Section
830.01 A
830.01 B
830.02 B
830.02 D
830.02 G
830.03 F
Provide mortar consisting of a mixture of one part Portland Cement to two parts mortar
sand, and sufficient water to furnish proper consistency.
B. Underdrains
Item
Granular Fill
Perforated, Corrugated Polyethylene, or Plastic Pipe
Section
816.02 A.1
830.03 A.4
C. Bridge Approach Drains
Item
Coarse Aggregate – Size 4
Plastic Pipe (perforated and non-perforated)
Geotextile Fabric – Type D1
Section
816.02 A
830.03 A.4
858
D. Edgedrains
Item
Class 43 Aggregate
Perforated, Corrugated, P.E. Pipe
PVC Discharge Pipe
Geotextile Fabric
Section
816.03
830.03 A.4
830.03 A.3
858
The shale and L.A. abrasion requirements will not be required for Class 43 Aggregate
E. Structural Plate Pipe
Material shall meet Section 830.02.
714.04 CONSTRUCTION REQUIREMENTS
If the Contractor’s operations cause the existing drainage facilities to become inoperable before
the new drainage system is functioning, provide sufficient temporary pumping and/or drainage
facilities to keep the roadway drained to the satisfaction of the Engineer. Include the cost of
providing sufficient temporary pumping and drainage in the price bid for other items.
A. Culverts and Storm Drains
1. Excavation
Where required, construct a longitudinal camber of the magnitude specified in the
trench.
Remove rock, shale, or hard pan to a depth 1 foot below the bedding elevation and
replace with bedding material. The Department will pay for excavation required in excess
of the specified bedding elevation as classified in Section 203.
2. Bedding
Construct bedding to meet the conduit manufacturer’s recommendations
3..Place the backfill in lifts not to exceed 6 inches of loose materials. During placement and
compaction, ensure each side is brought up within 6 inches of the other at all times.
Compact the backfill and bedding to the requirements specified and shown on Standard
plate drawings D714.25 through D714.28.
4Polymer Coated Corrugated Steel Pipe
Use a wide canvas slings or wide padded skids when handling polymer coated
corrugated steel pipe.
Replace pipe that has damaged polymer coating. If the Engineer determines that repairs
can be made to the polymer coating, perform repairs in accordance with AASHTO M
243.
5Laying Pipe
Begin laying pipe at the downstream end. Place the lower segment of the pipe in contact
with the shaped bedding throughout its full length. Place bell or groove ends of rigid pipe
and outside circumferential laps of flexible pipe facing upstream.
6Joining Pipe
The Engineer will allow rigid pipe of bell and spigot or tongue and groove design, Join
pipe sections so the ends are fully entered and the inner surfaces are flush and even.
7Relaid Pipe
Clean all salvaged pipe of foreign material before reinstallation.
Furnish connecting devices or seals needed to join pipe or end sections.
78Deflection Testing
Inspection of installations is limited to a minimum of 25 percent of all installations. Test
allthermoplastic pipes used for mainline and paved intersecting roadways for deflection a
minimum of 30 days after the pipe is installed unless pipe installation is under water.
Pass a nine point mandrel or other approved object through the pipe to check for
deflection. Mandrel testing is only required when visual inspection indicates non-
compliance. Perform the deflection test under the observation of the Engineer. Use a
mandrel with a diameter not less than 95 percent of the inside diameter of the pipe. If the
pipe has deflected more than 5 percent, replace the pipe.
The Engineer may require deflection testing of thermoplastic pipe used for approaches.
B. Smooth Wall Steel Pipe Culvert
Install smooth wall steel pipe culverts using equipment that encases the hole as the earth is
removed. Perform boring concurrently with the installation of the steel pipe. Extend steel
pipe through the undisturbed fill and install it without disrupting traffic or damaging the
roadway grade and surface. Perform the boring or jacking without use of water.
Bore in straight lines. Place the flow line elevation at the starting point for jacking within 0.1
foot of the staked grade. Install the pipe so the flow line is not reversed at any point and the
line and grade at any point within the pipe does not vary by more than 1/2 foot from the
designated line and grade.
Smooth wall steel pipe must be spliced by welders qualified for groove welded pipe position
5G. The Department will require welders be qualified according to AWS D1.1 except the
Department will not require full penetration. Construct the splice so the root pass and the
remaining part of the weld, including the reinforcement, meets the requirements of AWS
D1.1. Use reinforcement that is less than 1/8 inch in height.
When transitioning between smooth wall steel pipe culverts and other pipe material, provide
a connection between the differing materials Provide a connection constructed in
accordance with the pipe manufacturer’s guidelines. Submit a detail drawing showing the
construction of the connection before fabrication.
C. Underdrains
Encase the perforated underdrain in a granular fill trench section with the trench section
enclosed with filter fabric. Use filter fabric that meets the requirements of Section 709.02,
“Filter Fabric Underdrain.” Dig the trench section 1.5 feet wide and 2.0 feet deep. Place the
underdrain to rest on the filter fabric at the bottom of the trench, at the desired grade. Use a
maximum of 1 inch of granular material to adjust the pipe to grade. Overlap the filter fabric a
minimum of 12 inches.
Cement the PVC
recommendations.
joints
with
solvent
in
accordance
with
the
manufacturer’s
Use ordinary backfill above the granular fill material as specified in Section 210 “Structural
Excavation, Structural Fill, And Foundation Preparation.”
D. Bridge Approach Drains
Place and compact backfill using the same density requirements as the adjacent
embankment.
E. Edgedrains
Install edgedrain outlets at intervals of 250 feet. Install double outlets at intervals of 500 feet
and at low points in the edgedrain flow line.
Place the edgedrain with a machine trencher capable of cutting the trench, lining the trench
with a geotextile fabric, and laying the pipe in a continuous operation. Use machine trencher
designed and operated so the excavated material does not fall back into the trench. Place
the edgedrain at a minimum grade of 0.2 percent. Use laser grade control on the trenching
machine whenever the pipe grades do not follow the pavement grades at a constant depth.
Remove and dispose of the excess excavated trench material.
Compact the trench backfill with a hand-held air-operated, mechanical tampers.
If edgedrain is installed adjacent to non-permeable base material, enclose the edgedrain in
a geotextile fabric sock. Use Type D3 or Type D4 geotextile drain fabric as specified in
Section 858, “Geotextile Fabrics.”
Install edgedrain outlets concurrently with the longitudinal edgedrain. Place the discharge
pipe at a minimum grade of 2 percent. . Install headwalls a minimum of 6 inches above the
ditch grade. Use grout to secure the discharge pipe to the headwall. Shape the inslope to
conform to the sides and toe of the headwall. Install the headwall and rodent screen at the
same time as installing the outlet pipe.
Install the rodent screens to be removable. Do not grout the rodent screens into place.
Connect edgedrain outlets to a storm sewer system using grout, rubber or plastic gaskets, or
a gasket joint inserted into a thermoplastic coupling cast into the inlet, manholes, or pipe.
Make the connections to the storm sewer concurrently with the installation of the drain.
Cap the ends of the drainage line where outlets are not required.
Connect all joints securely according to the manufacturer’s recommendations.
F. Structural Plate Pipe
Place the backfill in lifts not to exceed 6 inches of loose material. During placement and
compaction, ensure that each side is brought up within 6 inches of the other at all times.
Compact the backfill and bedding meeting the requirements specified in Section 203. 04
E.2.a “AASHTO T 180”
714.05 METHOD OF MEASUREMENT
The Engineer will measure, completed and in place, as specified in Section 109.01,
“Measurement of Quantities” and as follows:
A. Culverts and Storm Drains
The Engineer will measure newly installed pipe along the bottom of the pipe and round the
measurement to the nearest foot. The Engineer will not measure flared end sections
separately, the end sections will be considered part of the conduit.
The Engineer will include branch connections and elbows in the length measured for pipe.
B. Edgedrains
The Engineer will measure continuously through outlet structures installed along the drain.
714.06 BASIS OF PAYMENT
Pay Item
Pay Unit
Pipe Conduit__inch
Pipe Conduit__inch Storm Drain
Pipe Conduit__inch Approach
__ IN Grates for Reinf Conc End Section
Relaying Pipe (Type and Size)
Relaying End Section (Type and Size)
Bridge Approach Drains
Edge Drain Non-Permeable Base
Headwalls, Precast Concrete, 4 In.
Linear Foot
Linear Foot
Linear Foot
Each
Linear Foot
Each
Each
Linear Foot
Each
Such payment is full compensation for furnishing all materials, equipment, labor, and incidentals
to complete the work as specified.