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Diameter: 120 ft

Height: 40 ftCapacity 80,500 BBLBuilt: 1931Shell: RivetedFoundation: Earthen

Floating Roof: Steel AnnularPontoon

Fixed Roof: Aluminum Dome

Foundation Repairs for Out-of-Round Tanks

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Condition:

Tank was inspected in 2002

Maximum elevation difference of 0.53 ft or6 3/8 inches

Tank could only be filled half way

Aluminum dome installed mid 1980s

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Tank Foundation Settlement

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Edge Settlement was Found

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Out-of-Roundness

-8.75 in

+6.14 in

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Measuring

Out-of-

Roundness

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Windgirder Riveted to Shell

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Possible Solutions:

Continue service as the tank is

Remove the tank and build a new one

Re-level the existing tank

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Chosen Solution:

Re-level the foundation

Correct out-of-roundness

Allow utilization of the entire tank

Correct internal edge settlement

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The Plan:

A.R. Watson, U.S.A. to lift the tank level

with highest elevation

TCMS to excavate the area and install anew concrete ringwall foundation

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Implementation:

A.R. Watson started lifting

the tank

Aluminum skirt damage

observed on the dome Work stopped to consider

options

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Moving Forward

Remove the dome

Hold the dome over the tank

Re-level the Tank with the dome in Place

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Dome positionsmarked on Shell

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Wire Rope

Come Along to tension wire rope

Wire Rope Layout

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Dome Roof Support

Tank Windgirder

Bracing

Cross Bracing Between Supports At 4 Positions Around Dome

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New Foundation Installed

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New Foundation Installed

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New Foundation Installed

N k h t ill

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Never know what you will

find

T k

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Tank

Details

Built 1963

70 Diameter

51 Tall

Altered 1993

Dome

IFD

Windgirder

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Work Progressed on the Tank

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g

The Concrete ring was extended almost two feet

New Anodes added

A Leak Detection System added

Leak Containment Added

A New Bottom was installed

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Hot Asphalt Tank

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Tank BottomInspection Report

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Over Pressure Event

180 ft Diameter CRT Tank

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Breakout Tank for Pipeline Usage

Stores Diesel Fuel

Bottom Recently replacedAnnular Ring

5/16 inch bottom plates

Pipeline Nitrogen DisplacementTank Being used for Nitrogen Blow-down

Over Pressure Event

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Areas of bottom plate lifting.

These locations were directly

below the areas in the cone roof

where the over-pressurization

had damaged the roof plates.

Area of top shellcourse damage.

Over Pressure Event

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eformed Roof Plates.

C l t l b

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Columns are not plumb.

P

L

U

M

B

L

I

N

E.

Shell Failure.

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Twisted Roof Structure.

P

L

U

M

B

L

I

N

E.

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Twisted Roof Structure.

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New Tank Construction

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Diameter = 90 ft (27.4 M)

Height = 51 ft (15.48 M)

Internal Aluminum Skin& Pontoon Deck

Aluminum Dome Roof

Service = Gasoline

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ppen xO

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Hydrostatic Test

Testing of the shell

1. To the maximum design height

2. For a tank with a tight roof, 2in. Above weld

connecting roof plate, or

3. To a level lower than 1 or 2 when restricted by

overflows, internal roof, or other freeboard

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Finished ?

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