Table 9. FRF tide gage histories. 



Water 



depth, MSL 



(m) 



Type of gage 



Proper operation 

 Beginning End 



Explanation 



FRF pier sta. 

 19+60 (NOS 

 gage 865-1370) 



FRF pier sta. 

 7+20 (NOS 

 gage 865-1371) 



Digital recording 

 float type (Leupold 

 Stevens; Fischer - 

 Porter) 



Digital recording 

 float type (Leupold 

 Stevens; Fischer- 

 Porter) 



June 1978 

 13 Nov. 1979 

 13 July 1979 

 19 Jan. 1978 

 11 Apr. 1978 

 2 June 1978 

 31 June 1978 

 18 Oct. 1979 

 7 June 1979 

 10 Sept. 1979 



2 Oct. 1979 



3 Dec. 1979 



10 Nov. 1979 

 2 July 1979 

 Present 

 8 Apr. 1978 

 1 May 1978 



15 June 1978 



16 Oct. 1978 

 5 June 1979 

 5 Sept. 1979 

 I Oct. 1979 



1 Nov. 1979 



Battery problem. 



Gage stopped, possible 

 orifice problem. 



Orifice closed due to 

 biological fouling. 

 Orifice silted in. 



Problem unknown. 



Orifice silted in. 



Problem unknovm. 



Orifice silted in. 



Battery problem. 



Orifice silted in. 



150 

 120 



_ 90 



E 



60 

 a 



1 30 



w-30 

 -60 

 -90 

 -120 



EH = Extreme High MSL = Mean Sea Level 



MR - Mean Range MLW - Mean Low Water 



MHHW = Mean HIglier High Woter MLLW = Mean Lower Low Water 



MHW = Mean High Water EL = Extreme Low 



a Extreme Values 



,, ,, , * Mean Ronqe 



• Mean Volues ^ 



1 1 1 



1 1 1 



* 



it 



1 



ft 



1 

 a 



# 



I 



A 



1 



a 



* 





1 1 1 

 EH 



a^ 



r 



T 



a 



* 



1 



1 1 1 1 



MR 



a \a 



* i * i 



- 



A 







• 





• 







a 





a 







MHHW " 



- 



• 



• 

 • 



• 

 • 





• 



• 



• 

 • 



• 

 • 



• 



• • 

 • 



• 

 • 



• 

 • 



• 

 • 



t 



MHW"^ 



- 









• 





• 

















- 



- 



• 



• 



• 





• 





• 



• 



• 

 • 



• 



• 



• 



• 



• 



• • 



• _ 



MSL^^"^ 











t 





^ 

















MLW 



- 



• 



a 



t 

 a 



t 

 a 



a 



• 

 a 



a 



t 



t 



• 

 • • 



a 



t 

 a 



t 



A 



• 

 • 



a 



t 



a 



MLLW— >**- 



1 1 1 



r r 1 









1 





a 



a 



a, 

 1 1 



^ 



-EL 



1 



1 



a " « 

 a 



1 1 1 1 



90 

 60 



30 I 



C 



I 

 30 •= 

 60 

 90 

 120 



(978 



1979 



Figure 10. Tide-water level statistics for the pier-end 

 tide stations 865-1370. 



34 



