This article describes the process I used to create HDR photographs of a night time concrete pour for the Ohio River Bridges Project Downtown Span Tower base.
Tag: KY
I-65 Southbound Section Was Nearing Completion
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During the last days of construction of Phase One, Section One, of the I-65 Southbound Section, on the Ohio River Bridges Project the activity was fast and furious. There were areas that needed to be paved and concrete forms that needed building in order to stay on schedule and have it open for traffic by Sunday night.
In some of the following photos of the I-65 Southbound Section you will see areas that were almost completed and had the yellow and white traffic lane lines in place. In others the people were hard at work putting the finishing touches on their work.
Everyone was working long hours on the I-65 Southbound Section as the schedule was for 24 hours a day so the crews were constantly moving. In this group of photos you can see the amount of progress that was made in a single day. I was there early in the morning to catch the first light of day and returned in early evening to capture the progress and take advantage of the sunset light in the sky and clouds.
All the images in this post are HDR images from three frame bracket sets of +2, 0 and -2 EV exposures that were then merged in NIK HDR Efex Pro 2 and finished with Aperture 3. Using HDR techniques allows me to capture the broad dynamic range that exists at these times of day and to then use the tone mapping tools to reveal details in the shadows while also capturing the vibrance in the clouds and sky.
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It’s Independence Day!
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Today is Independence Day here in the USA. Rather than go out to a fireworks show tonight I decided to share these shots from last year’s fireworks in Waterfront Park in Louisville.
HDR Image of 127 Feet Tall Caisson
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Last Wednesday the Ironworkers placed a 12 foot diameter, 127 foot tall caisson in the pier near the Kentucky shore. It weighed over 170,000 pounds and was going in one of the deepest piers of the project. Watching them lift it from a horizontal position into a vertical position was amazing. It took two cranes to do it and the coordination required was incredible.
This HDR image is from a three frame handheld bracket set consisting of +2, 0 and -2 EV exposures. I took the three frames into NIK HDR Efex Pro 2 where I merged them and applied the Balanced preset. While there I set the Detail slider to accentuated and the Drama slider to deep. In order to suppress some serious halos that were showing up along the vertical elements in the sky I reduced the Method strength slider until the halos were gone. I then took the merged file back into Aperture 3 for final adjustments to colors, sharpening and contrast.
HDR Photos of Progress on the Ohio River Bridge North Tower
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The Ironworkers and Carpenters have been very busy over the winter and the North Tower of the Downtown Span is progressing well. In this first image you can see the tower base as it stands today. The Ironworkers are tying the rebar for the next section and as soon as that is done the Carpenters will form that section for the next concrete pour.
I regret that I was under the weather for the first two months of this year and unable to get out to the Ohio River Bridges project very often. In looking back at the images from the end of 2013 I can see that there has been a great deal of progress. I’m back on the job now and will be posting on a regular basis as I did throughout the end of summer and into fall.
All of these images today are HDR images processed in NIK HDR Efex Pro 2 and Aperture 3. As is my standard practice I shot everything handheld in three frame bracket sets of +2, 0 and -2 EV exposures. I applied 60% anti-ghosting during the merging of these three exposures and used the Balanced Preset as my starting point. After merging them and applying the preset I went back into the tone mapping settings and changed the Detail slider to Accentuated and the Drama slider to Deep. That is all I did in NIK HDR Efex Pro 2 before returning the merged file to Aperture 3 where I adjusted the color channels, sharpening, contrast and applied a small vignette.
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In this image the Ironworkers are working with the crane Operator to lift more materials onto the tower scaffolding. They have to communicate with the Crane Operator using hand signals and radios to safely manage material transfers. I am always amazed at the skill of these crane operators to place everything from a small bundle of steel reinforcing to massive concrete forms on the job with pinpoint accuracy.
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In this HDR image the concrete form is being removed from the angled surface of the eastern side of the eastern pier of the North Tower. The carpenters have unbolted it and rigged it for the crane Operator to lift it and transfer it to a waiting barge until it is needed again. Seeing the Carpenters alongside these forms gives scale to their size. Once again the Crane Operator and the Carpenters are working through radio and hand signals to safely move this massive piece of concrete form.
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For this HDR image I chose to shoot the removal of the concrete form in a vertical format to better capture the cranes and the upward momentum that the project exudes as it progresses.
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This HDR image shows both bases for the North Towers of the Ohio River Bridges Project Downtown Span. The progress that is being made really comes out in this HDR photo. The concrete forms have been removed from the base of the western side of the towers and scaffolding is surrounding the transition point as the base morphs into it final cylindrical shape which will be approximately 150 feet in the air when it is completed.
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This HDR image shows a cooling manifold being lifted into place. It is used to distribute cooling water through the concrete as it cures. When concrete cures there is a lot of heat inside it; this is due to the catalytic reaction of the materials that are used to make concrete. Without cooling this reaction would cause the concrete to overheat and lose it’s strength. The cooling process goes on until sensors built into the structure provide the information to show that it is safe to stop cooling the concrete and allow it to finish curing.
I’m really glad to get back to shooting the Ohio River Bridges Project and posting my work again. I hope that small hiccup at the beginning of the year won’t be repeated and I can complete my project of documenting the Ohio River Bridges Project and the men and women who are doing it.
