President Trump has preached his desire for a new wall along the U.S.-Mexico border: Build it “big” and build it “beautiful,” with Mexico footing the bill.

But Trump still does not have the funding from Congress, and Mexico has repeatedly said it will not pay for the wall. However, in this year’s budget, Congress has set aside $20 million for prototypes.

Any wall design must meet the following requirements:

Walls need to be at least 18 feet tall, however, 30 feet is considered ideal.

30 FEET

A person should not be able to climb to the top of the wall unassisted. Walls should include anti-climbing features that prevent scaling, even with the use of climbing aids.

Any exposed fixtures need to be on the U.S. side to shield from possible tampering.

The U.S. side of the wall should also be visually pleasing in color, texture, and fit into the general surrounding environment.

No hole larger than a foot can be made through the wall in under an hour of trying with the use of hand-held tools.

1 FOOT

Wall designs must be cost effective to construct, maintain and repair. The designs should also accommodate Border Patrol-approved pedestrian and vehicle sliding gates.

6 FEET

Walls must accommodate surface drainage and also be constructible on slopes of up to 45 percent.

Wall designs must also be able to prevent tunneling from below for at least 6 feet.

30 FEET

Walls need to be at least 18 feet tall, however, 30 feet is considered ideal.

A person should not be able to climb to the top of the wall unassisted. Walls should also include anti-climbing features that prevent scaling, even with the use of climbing aids.

Any exposed fixtures need to be on the U.S. side to shield from possible tampering.

The U.S. side of the wall should also be visually pleasing in color, texture, and fit into the general surrounding environment.

No hole larger than a foot can be made through the wall in under an hour of trying with the use of hand-held tools.

1 FOOT

Wall designs must be cost effective to construct, maintain and repair. The designs should also accommodate Border Patrol-approved pedestrian and vehicle sliding gates.

6 FEET

Wall designs must also be able to prevent tunneling from below for at least 6 feet.

Walls must accommodate surface drainage and also be constructible on slopes of up to 45 percent.

30 FEET

Walls need to be at least 18 feet tall, however, 30 feet is considered ideal.

A person shouldn’t climb to to the top unassisted. Walls should also include anti-climbing features that prevent scaling, even with the use of climbing aids.

Any exposed fixtures need to be on the U.S. side to shield from possible tampering.

The U.S. side of the wall should also be visually pleasing in color, texture, and fit into the general surrounding environment.

No hole larger than a foot can be made through the wall in under an hour of trying with the use of hand-held tools.

1 FOOT

Wall designs must be cost effective to construct, maintain and repair. The designs should also accommodate Border Patrol-approved pedestrian and vehicle sliding gates.

6 FEET

Wall designs must also be able to prevent tunneling from below for at least 6 feet.

Walls must accommodate surface drainage and also be constructible on slopes of up to 45 percent.

30 FEET

Walls need to be at least 18 feet tall, however, 30 feet is considered ideal.

A person should not be able to climb to the top of the wall unassisted. Walls should include anti-climbing features that prevent scaling, even with the use of climbing aids.

Any exposed fixtures need to be on the U.S. side to shield from

possible tampering.

The U.S. side of the wall should also be visually pleasing in color, texture, and fit into the general

surrounding environment.

No hole larger than a foot can be made through the wall in under an hour of trying with the use of hand-held tools.

1 FOOT

Wall designs must be cost effective to construct, maintain and repair. The designs should also accommodate Border Patrol-approved pedestrian and vehicle sliding gates.

6 FEET

Wall designs must also be able to prevent tunneling from below for at least 6 feet.

Walls must accommodate surface drainage and also be constructible on slopes of up to 45 percent.

In a splotch of remote land along the border outside San Diego, six construction companies have built eight border wall prototypes for U.S. Customs and Border Protection.

In March, the agency solicited vendors to bid for an opportunity to build the test walls.

UNITED

STATES

MEXICO

Tijuana

San Diego

Test site

Existing

border

fence

MEXICO

UNITED STATES

Tijuana

San Diego

Test site

Existing

border

fence

MEXICO

UNITED STATES

Tijuana

San Diego

Test site

Existing

border

fence

Six companies, based in Alabama, Arizona, Mississippi and Maryland, won contracts to build a prototype with concrete or “alternate materials.” Two of the companies won bids to construct both versions.

Beyond the basic requirements, each company also incorporated unique design elements.

Here are what the designs look like:

Click and drag

to rotate models

Click and drag

to rotate models

Click and drag

to rotate models

What’s next for the wall?

The completed wall sections will need about 30 days for the concrete to cure, followed by 30 to 60 days of testing and evaluation.

With about $3.3 million contracted on the prototypes, the Border Patrol will use what it learned from the test walls toward a final design for the nearly 2,000-mile-long Southwest border.

The agency might consider a final wall that uses a hybrid of different features from the prototypes. Or, there’s a chance it might not use any of the designs it contracted out at all.

There is currently about 705 miles of fencing along the 1,969-mile border

ARIZ.

N.M.

CALIF.

TEXAS

Prototype

construction

area in

San Diego

100 miles

200 miles

Pacific

Ocean

The Rio Grande creates a natural partition along another 1,252 miles

100 miles

CALIFORNIA

ARIZONA

NEW MEXICO

There is currently about 705 miles of fencing along the 1,969-mile border

San Diego

Tucson

Tijuana

El Paso

TEXAS

Prototype

construction

area

Juarez

Nogales

Del Rio

Eagle Pass

100 miles

Pacific

Ocean

Laredo

The Rio Grande creates a natural partition along another 1,252 miles

Nuevo

Laredo

Brownsville

Matamoros

CALIFORNIA

ARIZONA

NEW MEXICO

100 miles

Prototype

construction area

San Diego

There is currently about 705 miles of fencing along the 1,969-mile border

Calexico

Tijuana

Tucson

TEXAS

El Paso

Pacific

Ocean

Juarez

The Rio Grande creates a natural partition along another 1,252 miles

Nogales

Del Rio

Eagle Pass

100 miles

Gulf of

Mexico

Laredo

Nuevo

Laredo

Brownsville

Matamoros

CALIFORNIA

ARIZONA

NEW MEXICO

100 miles

Prototype construction area

San Diego

There is currently about 705 miles of fencing along the 1,969-mile border

Tijuana

Calexico

Tucson

TEXAS

El Paso

Pacific

Ocean

Juarez

The Rio Grande creates a natural partition along another 1,252 miles

Nogales

Del Rio

Eagle

Pass

Laredo

Gulf of

Mexico

Nuevo

Laredo

Brownsville

Matamoros

About this story

Information about the prototype contracts, companies and design requirements provided by U.S. Customs and Border Protection. Contract cost and general information about wall designs from Associated Press reports. Illustrations of the wall designs were reconstructed from published images of the completed prototypes. Photograph of U.S.-Mexico border from REUTERS.

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