{ "item_title" : "An Introduction to Operation and Maintenance of Navigation Dams", "item_author" : [" J. Paul Guyer "], "item_description" : "Introductory technical guidance for civil engineers, mechanical engineers and construction managers interested in operation and maintenance of navigation dams and locks. Here is what is discussed:1. MAINTENANCE AND EMERGENCY CLOSURE2. MAINTENANCE OF GATED NONNAVIGABLE SPILLWAY STRUCTURES3. EMERGENCY CLOSURE OF GATED, NONNAVIGABLE SPILLWAY STRUCTURES4. MAINTENANCE OF GATED, NAVIGABLE SPILLWAYS5. EMERGENCY CLOSURE OF A GATED, NAVIGABLE SPILLWAY.6. MAINTENANCE AND EMERGENCY CLOSURE OF A FIXED-CREST SPILLWAY7. FLOATING PLANT8. GALLERIES, ADITS, AND OPENINGS9. SEEPAGE CONTROL MEASURES AND FEATURES", "item_img_path" : "https://covers1.booksamillion.com/covers/bam/9/79/871/197/9798711978756_b.jpg", "price_data" : { "retail_price" : "47.95", "online_price" : "47.95", "our_price" : "47.95", "club_price" : "47.95", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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