{"id":31534,"date":"2017-04-03T10:37:16","date_gmt":"2017-04-03T14:37:16","guid":{"rendered":"https:\/\/www.constructionspecifier.com\/?p=31534"},"modified":"2017-06-08T09:21:26","modified_gmt":"2017-06-08T13:21:26","slug":"ovids-metamorphosis","status":"publish","type":"post","link":"https:\/\/www.constructionspecifier.com\/ovids-metamorphosis\/","title":{"rendered":"Ovid\u2019s metamorphosis"},"content":{"rendered":"
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Earth Services & Abatement\u2019s (ESA\u2019s) engineering reduced the cost of demolition by several million dollars for the Amalgamated Sugar Coop project in Ovid, Colorado. <\/span>
Photo courtesy ESA<\/em><\/figcaption><\/figure>\n

How open-air demolition halved costs for a sugar factory project
\nby Sue Rose
\n<\/strong>The small town of Ovid rests in the far northeast corner of Colorado near the Nebraska border. While its modern amenities are limited to a couple of restaurants, a grocery, and a gas station, the town retains a significant historical landmark: the gleaming white storage silos containing beet sugar from what once was the Great Western (GW) Sugar Company\u2019s finest factory.<\/p>\n

Built during the booming sugar economy of the early 1900s, Ovid\u2019s huge GW factory was built with coal, steam, and mules. The town incorporated in 1925 during the factory\u2019s construction, and by 1940 had grown to a resident population of 650\u2014twice the town\u2019s current population. Unfortunately, Colorado\u2019s sugar economy died off with the expiration of the Sugar Act<\/em> in 1974, and the factory closed two years later.<\/p>\n

By September 2006, the entire domestic beet-sugar industry had become grower-owned. Amalgamated Sugar, a cooperative of sugar beet farmers, bought the Ovid property in 2002. It had been abandoned except for the warehouse and silos, which were still in use. Amalgamated Sugar did not anticipate the liability they had taken on along with the purchase of the property.<\/p>\n

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Photo of original boilers under construction.<\/span>
Photo courtesy TASCO<\/em><\/figcaption><\/figure>\n

As with other abandoned sugar factories now dotting the rural landscape, Ovid\u2019s abandoned factory was truly dangerous\u2014structurally unsound and riddled with asbestos. In 2011, a death at an abandoned sugar factory in a nearby town (a person died after plunging 23 m [75 ft] while exploring the ruins) brought attention to the need to demolish and abate these sites.<\/p>\n

Amalgamated Sugar made the commitment to abate and demolish the factory site, which included 11 smaller buildings, a 10,777-m2<\/sup> (116,000-sf) mill, and a 59-ha (146-acre) site. The enormous price tag for the job would have to be borne by the cooperative\u2019s 750 farmers themselves, with no hope for return on their money. Still, they deemed the investment worthwhile to eliminate the looming liability. They contracted with Schafer Environmental Consulting to devise a plan for abatement and demolition that would leave only the sugar storage silos and one warehouse standing.<\/p>\n

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ESA\u2019s high-reach excavator with misting system and shear was used to safely bring the mill building to the ground. <\/span>
Photos courtesy ESA<\/em><\/figcaption><\/figure>\n

Five years in planning stages
\n<\/strong>For five years, Schafer conducted extensive research and worked a complex series of proposals with the Colorado Department of Public Health and Environment (CDPHE). Several abatement and demolition firms bid on the project, intending to use traditional methods\u2014that is, fully containing the structure in poly sheeting and then demolishing the structures after all asbestos had been removed. The costs were astronomical, ranging from $7.3 to $11 million. Earth Services & Abatement (ESA) proposed an alternate plan that might, if successful, save millions of dollars.<\/p>\n

Central to the problem was the mill. According to Rod Schafer, that building was like a massive city within itself, housing its own power plant, huge boilers, and rusted machinery.<\/p>\n

\u201cThe upper floors were collapsing,\u201d he explained. \u201cEngineers and the local fire department assessed the building, and calculated what would be necessary to rebuild parts of the structure to make it sound enough to proceed with the asbestos abatement.\u201d<\/p>\n

The customary method would have been first to enclose the mill, abate the asbestos, and then to demolish. However, there were tremendous safety concerns related to abating the main structure. Walls were collapsing, floors had dangerous penetrations, and handrails were mangled and broken. In short, it was unsafe to abate. To find a safer, more cost-effective way, ESA teamed up with Schafer and CDPHE.<\/p>\n

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Wet methods were paramount to control air quality. The mill structure debris were pre-wetted for a period of no less than 45 minutes by the use of water cannons set to \u2018mist.\u2019 The state-certified asbestos inspector set air samples in designated locations prior to beginning demolition activities.<\/span><\/figcaption><\/figure>\n

The firm had two main challenges:<\/p>\n