Aggregates Manager Digital Magazine
Issue link: http://read.dmtmag.com/i/85639
On Our Cover: CalPortland's DuPont Pit ranks #2 in sand and gravel production in the nation. Cover photo by Kerry Clines. 39 14 As with any process equipment, wash plants require periodic operational and maintenance checks to optimize the machine's operation. Case's new 621F wheel loader provides up to a 10-percent increase in fuel economy over the previous model. CONTENTS MARCH 2012 VOLUME 17, NUMBER 3 Customer feedback programs allow operators to play a larger role in equipment design and evolution. 20Can You Hear Me Now? FEATURE ARTICLES 33The Nationʼs Top 25 Construction In 2010, the market appeared to bottom out with production con- tinuing its downward trend and average unit values down for the fi rst time since 1998. Aggregates Producers Long-term operation and maintenance of your classifying tanks can be achieved by following fi ve simple tips. Come to Paris in April for Intermat to see what the con- struction industry has up its sleeves for 2012 and beyond. 39Keeping the ʻClassʼ in Classifying Tanks 44A Look at Intermat Quality Control is Everything These quality control products can help operators test aggregates to make sure they meet the desired requirements. WEB EXCLUSIVES Visit www.aggman.com for expanded editorial coverage. Equipment Innovation Manufacturers chime in on leveraging customer feedback to upgrade equipment. OPERATIONS ILLUSTRATED 27Critical Crushing fl ow can maximize production from your crushing circuit. Ensuring a smooth, steady material COLUMNS & DEPARTMENTS 3 5 9 13 14 19 47 50 55 56 EDITORIAL Counting on a conference committee. AGGBEAT The latest information on AGG1 and other industry news. STATE AND PROVINCE NEWS A roundup of the latest news in North America. SAFETY WATCH Common-sense best practices to help avoid machinery accidents. ROLLOUTS Case's new 621F wheel loader and other new equipment for the aggregate market. DATA MINING The latest fi nancial analysis of issues impacting in the industry. ROCK LAW MSHA's expansive use of Section 103(k) orders is a derogation of the purpose and intent of an enforcement tool. CLASSIFIED ADS Aggregate industry classifi eds. ADVERTISER INDEX See who's who and where to fi nd their products. CARVED IN STONE Detailed studies of geologic joints and other planes of weakness should be included in the exploration and quarrying process.