2013NB/T 35006-2013 Design guide of cofferdam for hydropower engineering
1999DL/T 5087-1999 Design guide of cofferdam for hydropower and water conservancy project
DL/T 5087-1999 Design guide of cofferdam for hydropower and water conservancy project was changed to NB/T 35006-2013 Design guide of cofferdam for hydropower engineering.