Banqiao Dam discharge of the reservoir is 15000 m/s (about 3.96 million gallons/s). After the disaster of the Banqiao dam failure, the Chinese government became very focused on surveillance, repair, and consolidation of reservoir dams. China has 87,000 reservoirs across the country; most of which were built in the 1950s–1970s using low construction standards. Most of these reservoirs are in serious disrepair, posing challenges to the prevention and control of flood-triggered geological disasters in areas with a population of 130 million or more. China's medium and small rivers are considered to be the Achilles' heel in the country's river control systems. According
What Is and What Should Never Be (Supernatural) its original broadcast, "What Is and What Should Never Be" was viewed by an estimated 3.11 million viewers, one of the lowest ratings for the season. Conversely, writer Raelle Tucker won the Constellation Award for "Best Overall 2007 Science Fiction Film or Television Script" for her work on the episode, and the episode garnered positive reviews from critics. Tina Charles of TV Guide "adored" the episode, and considered it to be Jensen Ackles' best performance of the series. She experienced an "emotional roller coaster the entire hour", finding Dean's monologue at his father's grave to be "crushing" but the lawnmower