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Safety Recommendation Details

Safety Recommendation H-88-015
Details
Synopsis: ON APRIL 5, 1987, TWO OF THE FIVE SPANS OF THE NEW YORK STATE THRUWAY (I-90) BRIDGE OVER THE SCHOHARIE CREEK FELL ABOUT 80 FEET INTO A RAIN-SWOLLEN CREEK AFTER PIER 3, WHICH PARTIALLY SUPPORTED THE TWO SPANS, COLLAPSED. NINETY MINUTES AFTER THE INITIAL COLLAPSE, PIER 2 AND A THIRD SPAN COLLAPSED. FOUR PASSENGER CARS AND ONE TRACTOR-SEMITRAILER PLUNGED INTO THE CREEK, AND 10 PERSONS WERE FATALLY INJURED.
Recommendation: THE NTSB RECOMMENDS THAT THE AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS: ISSUE AN ADDENDUM TO THE MANUAL FOR BRIDGE MAINTENANCE-1987 THAT STRONGLY CAUTIONS THE USER THAT THE CHART ON PAGE 160, WHICH IS A "ROUGH GUIDE TO THE SELECTION OF AN ADEQUATE STONE SIZE AT BRIDGE CROSSINGS," IS PROBABLY INADEQUATE TO ENSURE THAT ALL THE RIPRAP WILL REMAIN IN PLACE UNDER THE AVERAGE VELOCITIES LISTED; ISSUE AN ERRATA SHEET TO CORRECT PREVIOUS EDITIONS.
Original recommendation transmittal letter: PDF
Overall Status: Closed - Exceeds Recommended Action
Mode: Highway
Location: Amsterdam, NY, United States
Is Reiterated: No
Is Hazmat: No
Is NPRM: No
Accident #: DCA87MH005
Accident Reports: Collapse of New York Thruway (I-90) Bridge over the Schoharie Creek
Report #: HAR-88-02
Accident Date: 4/5/1987
Issue Date: 6/8/1988
Date Closed: 5/12/1992
Addressee(s) and Addressee Status: American Association of State Highway and Transportation Officials (Closed - Exceeds Recommended Action)
Keyword(s):

Safety Recommendation History
From: NTSB
To: American Association of State Highway and Transportation Officials
Date: 5/12/1992
Response: The Safety Board commends the AASHTO for eliminating the chart on page 160 of the "Manual for Bridge Maintenance", and has classified Safety Recommendation H-88-15 as "Closed-Exceeds Recommended Action."

From: American Association of State Highway and Transportation Officials
To: NTSB
Date: 1/2/1992
Response: BASED UPON THE RECOMMENDATIONS OF THE SUBCOMMITEE, WE HAVE ISSUED A NEW PAGE 160 TO THE "MANUAL" WHICH ELIMINATES THE CHART AND RECOMMENDS A THOROUGH SCOUR EVALUATION. THIS CHANGE WAS BALLOTED THROUGH THE SUBCOMMITTEE ON HIGHWAYS AND THE EXECUTIVE COMMITTEE.

From: NTSB
To: American Association of State Highway and Transportation Officials
Date: 8/19/1988
Response: We appreciate the information that Safety Recommendations H-88-14 and -15 have been referred to the AASHTO Highway Subcommittee on Maintenance We look forward ,to receiving a further response from your office. In the'meantime, H-88-14 and -15 will be classified as "Open--Acceptable Action."

From: American Association of State Highway and Transportation Officials
To: NTSB
Date: 8/2/1988
Response: Recommendation H-88-12 and H-88-13 have been referred to the Highway Subcommittee on Bridges and Structures, which is the technical body within AASHTO responsible for maintenance and upkeep of Standard Specifications for Highway Bridges. Recommendations H-88-14 and H-88-15 have been referred to the Highway Subcommittee on Maintenance which has similar responsibilities with respect to Bridge Maintenance Manual. AASHTO technical publications are updated and reissued from time to time as directed by the responsible subcommittee and approved by the appropriate senior committees. In the case of Standard Specifications-for Highway Bridges, an annual interim is published which serves to update the document. The Manual referred to is normally reissued on a somewhat less frequent schedule. These recommendations from the Safety Board are currently under active consideration by both subcommittees and responses to them in the form of modifications to these documents will be effected at the earliest. practical time. In the meantime, please be assured that AASHTO member departments have been advised of the circumstances of this tragic accident and of the importance of inspection and maintenance of riprap protection at substructure units subject to scour. (Safety Board Recommendation H-88-23). This advice has taken the form of remarks and presentations at meetings of the appropriate AASHTO committees and through written correspondence to the members.