New York State Department of Transportation

Structures Design and Construction
Bridge Inspection Unit
Albany, NY

Bridge Diving Inspections & Fathometer Surveys. NBIS bridge diving and scour erosion inspections, including fathometric/scour evaluation assessments, of bridges spanning waterways.

Since 1991 through the end of 2007, the firm will have performed bridge diving inspections on a total of 4,857 substructure units (SSU) encompassing 1,463 bridges spanning waterways, and fathometer surveys on an additional 703 bridges situated over water for the New York State Department of Transportation. The work was performed in all eleven (11) regions of the state.

To date, BOSWELL has been awarded twelve consecutive term agreements for this type of work and is the only consulting engineering firm, acting in the capacity of prime consultant, to be designated for concurrent, overlapping bridge diving inspection contracts by the NYSDOT. This has occurred on four (4) separate occasions.

The NYSDOT Eastern Agreements for the two (2) bridge diving cycles also included construction diving inspection during Phase I of the Robert Moses Causeway over Great South Bay Reconstruction Project, a massive hydraulic study, parallel seismic testing, and a sizeable BIN folder research project that required a time sequence plotting of waterway cross-sections (from all recorded bridge surveys) with respect to embedded pile tip elevations at each bridge structure. A listing of past and current NYSDOT Bridge Diving & Fathometer Survey Contracts are as follows:

Agreement Nos.	Regions	Years	Bridges	SSU	FS Surveys
D006001	10 & 11	1991-1992	54	260	41
D006129	1,2,7,8 & 9	1992-1993	217	494	49
D007403; SA1	3,4,5 & 6	1994-1997	316	646	118
D008928; SA2	10 & 11	1997-2000	122	1367	139
D010140; SA1	1,2,7,8 & 9	1998-1999	150	327	40
D010471	1,2,7,8 & 9	2000-2001	103	209	55
D015139	3,4,5 & 6	2002-2003	125	246	86
D015236	10 & 11	2003-2004	65	651	80
D015361	3, 4, 5, & 6	2004-2005	135	240	19
D015537	1, 2, 7, 8, & 9	2006-2007	176	417	76