Medallion Design Competition

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Caldecott Tunnel Medallions

Fabrication

From Pencil Drawings to Concrete Medallions

The process of creating the concrete medallions for mounting on the tunnel portals is multi-phased, beginning with the "translation" of the winning paper-borne artwork into 3-D high-density foam models, which were created by professional sculptor Johnathan Roberson-Beery. The foam models were covered by a half-inch layer of clay. Glass Fiber Reinforced Concrete (GFRC) was then placed over the clay, creating a "mother mold."

Photo by John Huseby, Caltrans
 
Photo by John Huseby, Caltrans

After the GFRC dried, the clay was removed, leaving a half-inch gap between the foam artwork and the "mother mold." Liquid polyurethane rubber was then poured into the gap. When the rubber set, the foam and plaster were removed, leaving a negative impression of the artwork, which served as the mold for the concrete casting.

Photo by Karl Nielsen, MTC
 
Photo by Karl Nielsen, MTC

The castings are made of Glass Fiber Reinforced Concrete, which entails spraying a mixture of concrete and glass fibers into the rubber molds.

Photo by John Huseby, Caltrans
 
Photo by John Huseby, Caltrans

After curing for about 18-20 hours, the artwork was removed from the rubber molds in the presence of the young artists, revealing all of the detail on the medallions that will adorn the Fourth Bore for years to come.

Photo by John Huseby, Caltrans
 
Photo by John Huseby, Caltrans

Chaya Tong of Lafayette with the medallion she designed, which will adorn the East Portal of the Fourth Bore along with medallions designed by Daniell McCann and Penelope Watson.

Photo by John Huseby, Caltrans
 
Photo by John Huseby, Caltrans

Ellina Couts of Alameda admires the completed medallion based on her design, which will adorn the West Portal of the Fourth Bore along with medallions designed by Nuala and Aoife Gorshow.

Photo by John Huseby, Caltrans
 
Photo by John Huseby, Caltrans

The six designers pose with the completed medallions.

Photo by Karl Nielsen, MTC
 
Photo by Karl Nielsen, MTC

Workers install medallions on the east side of the Fourth Bore.

CONGRATULATIONS TO THE DESIGNERS!

ALAMEDA COUNTY MEDALLION COMPETITION AWARDS CEREMONY

On Thursday, December 6, in conjunction with the Alameda County Transportation Authority’s monthly board meeting, the Caldecott Tunnel Fourth Bore project held an awards ceremony to honor the Medallion Design Competition participants from Alameda County. The three selected designers from Alameda County were all in attendance, along with several participants selected as Honorable Mentions and competition judge Catherine Kniazewycz, Director of Architecture at University of California.

Alameda CTC Chair Mark Green acted as Emcee, with support from co-presenter Bijan Sartipi, Caltrans District 4 Director.

Check out photos from the Alamada County Medallion Competition awards ceremony!

Photos courtesy of John Huseby, Caltrans.

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Jeanne Gorham, Landscape Architect for Caltrans, explains the medallion casting process to the participants and their families.
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Caltrans District 4 Director Sartipi presents Honorable Mention Emily Henrich with her certificate.
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(from left to right) Selected designers Ellina Bartholomew Couts, Aoife Gorshow, and Nuala Gorshow were presented with their framed artwork and a competition poster.
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Alameda CTC Chair Mark Green presents competition judge Catherine Kniazewycz, Director of Architecture at University of California, with a framed competition poster.
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The participants and the Alameda County Transportation Commission Board.
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Caltrans District 4 Director Sartipi presented Honorable Mention participants with their certificates.

CONTRA COSTA COUNTY MEDALLION COMPETITION AWARDS CEREMONY 

On Wednesday, October 17, the Caldecott Tunnel Fourth Bore Project held an awards ceremony as part of the Contra Costa Transportation Authority's (CCTA) monthly board meeting to honor the participants of the Fourth Bore Medallion Design Competition from Contra Costa County. CCTA Chair Don Tatzin emceed the ceremony, with help from co-presenters Bijan Sartipi, Director of Caltrans District 4, and Amy Worth, Vice Chair of the Metropolitan Transportation Commission (MTC).

Sixteen participants attended the ceremony, including the designers of the three final medallions, a number of the participants selected as Honorable Mentions, and all their respective guests. Also in attendance was Public Art Consultant Regina Almaguer, who acted as a judge for the Contra Costa County portion of the Medallion Competition.

Check out photos from the Contra Costa County Medallion Competition awards ceremony!

Photos Courtesy of Karl Nielson, MTC.

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Contra Costa County selected designers and Honorable Mentions hold up Medallion Competition-themed t-shirts. With them are the three selected designers, Director of Caltrans District 4 Bijan Sartipi, CCTA Chair Don Tatzin, and MTC Vice Chair Amy Worth.
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The three selected designers for Contra County display their framed artwork, along with Ivy Morrison, Public Information Officer of the Caldecott Fourth Bore Project; Amy Worth, Vice Chair of MTC; Bijan Sartipi, Director of Caltrans District 4; Don Tatzin, Chair of CCTA; Rebecca Rosa, Project Coordinator.
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The selected designers were presented a framed copy of their artwork, alongside the competition poster. Nine-year-old Chaya Tong of Lafayette receives her award from Chair Tatzin.
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Chair Tatzin presents 14-year-old Penelope Watson, of Pleasant Hill, CA, with her award.
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Chair Tatzin presents 16-year-old Daniell McCann, of Lafayette, CA, with her award.
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Randy Iwasaki, Executive Director of CCTA, and Amy Worth, Vice Chair of MTC, joined in the celebration.
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MTC Vice Chair Amy Worth presents Public Art Consultant and Medallion Competition Judge Regina Almaguer with a framed competition poster.

Final Medallions Selected!

We are delighted to report that we received hundreds of outstanding entries for the Caldecott Fourth Bore Medallion Design Competition.

The Fourth Bore design plans call for a total of six medallions (three on each side of the tunnel).  The judges from Alameda and Contra Costa Counties faced a daunting task. Of the more than three hundred entries received, thirty from Alameda County and thirty-three from Contra Costa County were advanced to the second round of judging.

After a great deal of deliberation, the judges made their final decisions. The six selected designs are featured below, followed by the sixty-three finalists: our Honorable Mentions.

Thank you to everyone who participated in and supported this effort! Check back to this page, or sign up for our email announcements, as we plan a ceremony acknowledging the contributions of East Bay students to the Fourth Bore's design.

Meet the Artists!

Alameda County

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Nuala Gorshow

Age: 8

School: Thornhill Elementary, 3rd grade

"I think my art is art deco revisited because I used a art deco sun."

Aoife Gorshow

Age: 11

School: Thornhill Elementary, 5th grade

"I chose to draw this because when I think about art deco I think symmetrical. I chose the idea of the sun because suns usually are a sign of happiness and when people look at this I want them to feel happy."

Ellina Bartholomew Couts

Age: 10

School: Frank Otis Elementary

"The Caldecott Tunnels are separate but united.  The sun represents rebirth because the sun visits the earth and the tunnels each day.  In the picture, the sun is blazing much more than our usual sun would be.

Contra Costa County

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Daniell McCann

Age: 16

School: Acalanes High School, 10th grade

"In this design I tried to capture Mt. Diablo’s rugged hills with the classic oak tree in front.  It uses common art deco design defining the most important elements that I believe represent Contra Costa County."

Chaya Tong

Age: 8

School: Springhill School, 3rd grade

"My drawing illustrates what I love best about Contra Costa County: rolling green hills, bright sun, and the many plants."

Penelope Watson

Age: 13

School: Pleasant Hill Middle School, 8th grade

"When I think of the Bay Area I immediately picture San Francisco, but that’s not all the beauty surrounding our home. Entering the Caldecott Tunnel, I see the towering hills with wildlife everywhere, especially deer.

Honorable Mentions

Alameda County

Contra Costa County

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Click on the thumbnails to launch gallery