http://news.hankooki.com/lpage/society/201202/h2012020221034721950.htm

홍헌호 시민경제사회연구소 소장
"유지관리비를 줄이려면 보를 폭파해야 한다"

4대강 538㎞ 구간에서 평균 수심 10㎝씩 준설하는 데 매년 3,443억원, 
본류와 지류의 낙차로 인한 역행침식 대비에 또 1,500억원이 든다는 계산

윤석구 서울과학기술대 교수
"4대강에 설치된 16개 보를 해체하는 데 드는 비용은 2,016억원"
"보를 해체하면 국토해양부의 유지관리예산(1,997억원)만큼 매년 아끼는 셈"