Table 9.6

Bridge Scour and Stream Instability Countermeasures: Experience, Selection, and Design Guidance-Third Edition

Table 9.6 Fixed Instrumentation Selection Matrix Countermeasure Characteristics
Types of Fixed Instrumentation	Functional Applications					Suitable River Environment
	Local Scour		Contraction Scour	Stream Instability		Waterway Type		Flow Habit	Water Depth	Bed Material	Extreme Conditions	Foundation Type	Capabilities		Maintenance	Survey Respondents		Installation Experience
	Abutments	Piers	Floodplain and Channel	Vertical	Lateral	Tidal	Rivenne	E=Ephemeral I=Intermediate P=Perennial PF=Perennial Flashy	A=<3ft B=10-30ft C=31-50ft D=51-75ft E=>75ft	F=Fine Bed S=Sand Bed C=Coarse Bed R=Riprap	D=Debris T=Temperature S=Sediment Loads I=Ice Flows V=High Velocity Flows	P = Piles SF = Spread Fig	Continous Data Monitoring	Remote Technology	H=High M=Moderate L=Low	No. of Bridge Sites	No. of Instruments	Installation Experience by State from Surveys (Note: States in bold have indicated they plan to use fixed instrumentation in the future)	Additional Installation Experience by State from Other Sources
Sonar										4	T, I, V		Yes	Yes	M - H	48	164	AK, AR, CA, FL, GA, HI, IN, KS, MD, NC, NJ, NV, NY, TX, VA, WA	CO, NM, OR, RI, WI
Magnetic Sliding Collar									A, B	F, S, C			Yes	Yes	M	8	22	CA, HI, IN, MN, NJ, NY	CO, FL, ME, MI, NM, RI, TX, WI
Tilt Sensors													Yes	Yes	L	4	35	CA, WA
Float Out Device								E, I	A, B	F, S			No	Yes	L	3	35	AL, CA, NV	AZ
Sounding Rods									A, B	C	T, S	SF	Yes	No	H	0	0		AR, IA, NY
Time Domain Reflectometers								P, PF	A, B	F, S, C			Yes	Yes	M	1	2	VT