NEW YORK (Standard&Poor's CreditWire) Dec. 13, 1999-- Standard&Poor's today affirmed the short-term ratings on 20 Landesbank Hessen-Thüringen Girozentrale liquidity-backed municipal issues and placed them on CreditWatch negative. (See list below) This action follows the Dec. 7, 1999, placement of Landesbank Hessen-Thüringen Girozentrale's rating on CreditWatch with negative implications, Standard&Poor's said. – CreditWire 20 LANDESBANK HESSEN-THÜRINGEN GIROZENTRALE LIQUIDITY-BACKED MUNICIPAL ISSUES Issuer/Issue Amt($mil) Rtg Central Utah Water Conservatory District GO limited-tax refunding bonds (variable-rate tender option bonds) series 1998E 59.510 AAA/A-1+ GO limited-tax refunding bonds (variable-rate tender option bonds) series 1998F 36.255 AAA/A-1+ Dutchess County Resources Recovery Agency, New York Solid waste systems revenue bonds (federally taxable) series 1998A 31.200 AAA/A-1+ Intermountain Power Agency, UT Variable-rate