This coalfield is in Blair County; northern Cambria County; and part of Indiana County and southern Clearfield County. This is where the low-volatile metallurgical coal of the Windber Coalfield is morphing into a medium-volatile met and steam coal (as high as ~14,500 BTU/lb here), specifically in the Lower and Upper Freeport; and Lower and Upper Kittanning coal seams. There were a few beehive coke ovens around Barnesboro, Bennington, and Glen White. In the Allegheny Mountain Coalfield (also sometimes called the Mountain Coalfield) can be found the only area where coal was commercially mined in Blair County. (However there is a small area north of Altoona called the Tipton Run Coalfield, but I don't think the coal was ever mined on a commercial scale.)

Coal company-built houses in Bakerton, Pa. Barnes and Tucker Company operated the coal mines in this northern Cambria County community. (Image by Gregg Doll)

Former Barnes and Tucker company store in Bakerton. (Image by Gregg Doll)

Ancient photo of loaded mine cars waiting to be dumped into the tipple, shown in the background, at Pennsylvania Coal & Coke Corp.'s No. 21 mine. Pennsylvania Coal & coke, headquartered in Cresson, marketed their coal under the "Pardee" and "Webster" trade names. (Circa 1922 "Keystone Coal Catalog" image via Google Books)

On the mountain above Altoona the Glen White coke ovens can still be found. The ovens operated from around 1901 until the 1930's. (Image by Sam Baker)

Trunnel hole through which coal was fed into the top of one of the Glen White coke ovens. There was also a Glen White coal mine that fed these ovens, not to be confused with the Glen White coal mine in Raleigh County, WV. (Image by Sam Baker)

I'm not sure what this metal rod sticking out of one of the Glen White coke ovens is. They were operated by the Glen White Coal and Lumber Company, headquartered in Gallitzin, PA and Baltimore, MD.There was also once a small patch town associated with these coal and coke works, but nothing remains today but the ovens.(Image by Sam Baker)

Barnesboro, PA was named after Thomas Barnes, an official with the Barnes and Tucker Company. Sometimes this firm is also referred to as Barnes and Tucker Coal Company. (Image by others)

Here are some tipple ruins from the Sterling No. 1 coal mine near Barnesboro. This has been demolished and the mine site reclaimed since this picture was taken. (Image by Sam Baker)

What looks like an underground shuttle car at the Sterling Coal Company's Sterling No. 1 Mine ruins in Cambria County (Image by Sam Baker)

Another more intact shuttle car at the same mine ruins. (Image by Sam Baker)

This brick building near Shazen, PA was once an electrical substation for the Cherrytree Coal Company's Emeigh Run coal mine. (Image by others)

Early picture of the Watkins Coal Mine - built by the Watkins Coal Co. and later owned by the Barnes & Tucker Company. (Image source forgotten)

Watkins coal company's company patch town. (Circa 1922 image from "Keystone Mining Catalog" via Google Books)

Beehive coke ovens at what used to be Bennington, PA in Blair County. Bennington Coal Company, and later Argyle Coal Company, operated the Lower Kittanning seam coal mine at Bennington. (2012 image courtesy of Sam Baker)

Ruins of the coal mining town of Bennington. (2012 image by Sam Baker)

Remains of the town dump at Bennington - ripe for excavating for old milk bottles and wash tubs. (2012 image by Sam Baker)

Ruins of a small coal mine near Portage. (2012 image by Sam Baker)

Mine fan next to the mine ruins near Portage. (2012 image by Sam Baker)

More ruins near Portage that the photographer described as "a mine trestle ruin." (2012 image by Sam Baker)

Gob pile with the mine ruins shown above near Portage. (2012 image by Sam Baker)

Also in the Portage vicinity is this collapsed tipple, another great photo by Sam Baker. Sam writes, "I do not have any info on these mines, other than they were closed by the mid 60's." (2012 image by Sam Baker)

Bony pile near the collapsed tipple shown above. (2012 image by Sam Baker)