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From page 13... ... 13 OVERVIEW OF SURVEY AND LITERATURE SEARCH This overview of bridges with fixed scour monitoring systems includes data from the respondents of the survey, as well as information obtained from the literature search and other sources. This study identified 32 states and the District of Columbia that have installed fixed scour monitoring systems on one or more of their highway bridges. Read the entire page →
From page 14... ... two additional tables that can be used for the selection of fixed instrumentation and are based on the survey respondents and literature search. Bridge Geometry and Size The bridge owners reported that 89% of the structures monitored with fixed instruments were piers. Read the entire page →
From page 15... ... 15 State Bridge Type(s) of Fixed Scour Monitors Date o f Installation Waterw ay Type Flow Habit Waterw ay Depth Alabam a US-82 1 Float-O u t N /A Riverine Perenni al 51–75 f t Alas k a Tanana River Bridge No. Read the entire page →
From page 16... ... 16 State Bridge Type(s) of Fixed Scour Monitors Date of Installation Waterway Type Flow Habit Waterway Depth Georgia Otis Redding Bridge 6 Sonars 2001 Riverine None <10 ft Georgia Highway 384 over Chattahoochee River 4 Sonars 2001 Riverine None <10 ft US Highway 27 over Flint River 6 Sonars 2001 Riverine None 10–30 ft US Highway 17 over Darien River 3 Sonars 2001 Tidal None 10–30 ft Hawaii Kaelepulu Bridge, Oahu 2 Magnetic Sliding Collars 2002 Tidal Perennial but Flashy <10 ft Kahaluu Bridge, Oahu 1 Sonar 2003 Tidal Perennial <10 ft Indiana US-52 over Wabash River and SR-43 1 Sonar, 1 Magnetic Sliding Collar 1997 Riverine Perennial 10–30 ft Kansas Amelia Earhart Bridge (US-59) Read the entire page →
From page 17... ... 17 State Bridge Type(s) of Fixed Scour Monitors Date of Installation Arizona I-10 over Gila River, Bridge No. Read the entire page →
From page 18... ... 18 State Bridge Type(s) of Fixed Scour Monitors Date o f Installation N ew Mexico Bernado Bridge over the Ri o Grande Magnetic Sliding Collars San Antonio Bridge over the Ri o Grande Sonar s N ew Yor k State Rte 30/145 over Schohari e Cree k 1 Manual Sliding Colla r 199 4 US-418 Bridge over the Hudson Riv e r 1 Sona r 199 4 Oregon US-Hwy 101 over Alsea Ba y Sonars early 90s Highway 92 over Wallowa Rive r Sonar s Interstate 84 over Sandy Rive r Sonar s Hwy 226 over Crabtree Creek Sonar s Hwy 22 at Mill Creek Misc. Read the entire page →
From page 19... ... (continued on next page) State Bridge Nam e Bridge Identification Num ber (BIN) Read the entire page →
From page 20... ... State Bridge Name Bridge Identification Number (BIN) Read the entire page →
From page 21... ... State Bridge Name Bridge Identification Number (BIN) Read the entire page →
From page 22... ... 22 Sonar Sensors Magneti c Sliding Collars Tilt Sensors Float-Out Devices Piezoelectric Film Ti me Do ma in Reflectom eter s T ota l Bridge Geom etry Substructure Monitored Abutm en t 1 2 3 Pie r 47 10 3 2 2 1 65 Foundation Type Pile 33 4 2 2 1 42 Spread Footings 19 3 1 1 24 Drilled Shafts 0 Unknow n 0 Othe r 0 Waterw ay Characteristic s Waterw ay Type Tida l 11 1 12 Riverine 37 8 3 3 2 1 54 Flow Habi t Ephem eral 24 1 25 Interm itte n t 17 1 1 1 20 Perennial but flash y 4 4 1 1 1 11 Perennial 37 3 1 1 42 Water Dept h <10 f t (<3 m) Read the entire page →
From page 23... ... 23 Water depth can be another limiting factor. In deeper waterways it can be expensive and difficult to bury monitors in the streambed. Read the entire page →
From page 24... ... Scour History Most of the survey respondents who used fixed scour monitoring systems reported a history of scour and/or scour critical ratings at their bridge sites. The scour observations and evaluations were used in the decision-making process to determine the number and locations of the individual monitoring instruments. Read the entire page →
From page 25... ... 25 damage was often not anticipated by the bridge owner. This resulted in much higher maintenance and repair costs than were anticipated. Read the entire page →
From page 26... ... 26 make it difficult to install, maintain, and repair a fixed scour monitoring system. Figure 25 shows a variety of locations where the master and remote stations have been placed to provide access for maintenance and to protect the stations from vandalism. Read the entire page →
From page 27... ... 27 responses showed that 47% of the scour monitoring systems required access by boat. The high costs of owning or renting a boat and the increased personnel needed to operate the boat have made maintenance of some monitoring installations difficult or, without funding, some have been abandoned. Read the entire page →
From page 28... ... can turn into rapidly flowing rivers for a few hours or days after a rainstorm. Additionally, the railroads often have inspection programs during and after major storms. Read the entire page →

From page 13...

... 13 OVERVIEW OF SURVEY AND LITERATURE SEARCH This overview of bridges with fixed scour monitoring systems includes data from the respondents of the survey, as well as information obtained from the literature search and other sources. This study identified 32 states and the District of Columbia that have installed fixed scour monitoring systems on one or more of their highway bridges.