

Table 4. 



Datuing for reference tide stations.' 







Station 



Normalizuig 

 factor^ 



N)SL 



MTL 



NGVU 



MLLW 



MLW 



MIIW 



MIIHW 



Extremes of record 



.Interval for establiBliment 





Highest Lowest 



of datum 









Atlantic ar 



d gulf coasts 















Eastport, Maine 



M 



9.2 



9.10 



9.00 



3 



o.oo 



18.20 



3 



23.0 



-4,4 



1941.61 





Portland, Maine 



M 



4.5 



4.50 



4.28 





0.00 



9,00 





13.9 



-3.7 



1941-59 





Boston, MaBa. 



M 



5.2 



5.05 



4,89 





0.30" 



9.80 





14,2 



-3.5 



1941.59 





Newport, R.I. 



M 



1.6 



1.75 



1,37 





0.00 



3.50 





13.5 



-2.9 



1941-59 





New London, Conn. 



M 



1.4 



1.30 



0,97 





0,00 



2,60 





10,7' 



-3.4 



1941-59 





Bridgeport, Conn. 



M 



3.4 



3.35 



2,86 





0,00 



6,70 





12,4 



-3.5' 



1967(1 yr) 





Willets Point, N.Y. 



M 



3.6 



3.55 



3,02 





0,00 



7.10 





16,7 



-4.1 



1941-59 





New York, N.Y. (The Battery) 



M 



2.3 



2.25 



1.81 





0,00 



4.50 





10,2 



-4,2 



1941-59 





Albany, N.Y. 



M 



2.5 



2.5 



6 





0,00 



4,60 





6 



6 



1941-59 





Sandy Hook, NJ. 



M 



2.3 



2.30 



1.79 





0,00 



4.60 





10,3 



-4.4 



1941-59 





Breakwater Harbor, Del. 



M 



2.1 



2.05 



1.69 





0,00 



4.10 





9,5 



-3.9 



1953-61 





Kocdy Point, Del, 



M 



2.8 



2.75 



2,45 





0,00 



5,50 





lo.o' 



-6.3 



1957-61 





Philadelpliia, Pa. 



M 



3.2 



3.10 



2,14 





0.011 



6.19' 





10.7 



-6.6 



1941-59 





nallimore, Md. 



M 



1.0 



0.97 



0,57 





0.42* 



1,52 





8.3 



-4,5 



1941-59 





WashiiiBlon, D.C. 



M 



1.97 



1.97 



1,43 





0.52' 



3.42 





11.9 



-4,2 



1941-59 





llamploii Koads, Va. (SewcUs Point) 



M 



1.3 



1.25 



1.28 





0,00 



2,50 





8.5 



-3.1 



1941-59 





Wilmini.'ton, N.C. 



M 



1.9 



2,10 



1.52 





0.00 



4,20 





8.2 



-1.7 



Jan, 1969 to Nov 



1973 



Qiarkston, S.C. 



M 



2.7 



2.91 



2.55 





0.3l'° 



5,51 





10.7 



-3.3 



1941-59 





Savaiuiah River Entrance, Ga. (Ft. Palaski) 



M 



3.6 



3.45 



3,32 





0.00 



6,90 





"•'a 



-4.4 



1941-59 





Savaiinali, Ga. 



M 



4.0 



3.7 



6 





0,00 



7,40 





6 



6 



1941-59 





Mayport, Fla. 



M 



2.3 



2.25 



2,00 





0.00 



4.50 





7.4 



-3.2 



1941-59 





Miami Harbor Entrance, Fla. 



M 



1.3 



1.25 



0,96 





0.00 



2.50 





6.4 



-1.6 



1941-59 





Kc> WmI, Fla. 



M 



0.6 



0.65 



0,42 





0.00 



1,30 





3.8 



-1.6 



1941-59 





St. Petersburg, Fla. 



D 



1.2 



1.15 



0,83 





0,00 



2,30 





5.3 



-2.5= 



1948-59 





St. Mark.s Kivcr Entrance, Fla. 



D 



1.8 



1,8 



6 





0,00 



2.40 





8.0 



-3.5' 



1941-59 





Pcnsacola, Fla. 



D 



0.6 



0,65 



0,33 





0,00 



1,30 





8.9 



-2.2 



1941-59 





Mobile, Ala. 



D 



0.8 



0.75 



6 





0,00 



1,50 





9.0' 



-3.0' 



1941-59 





Galveston. Tex. (Ship channel) 



D 



0.8 



0,70 



0.70 





0,00 



1.40 





11.4 



-5.3 



1941-59 





San Juan, P.R. 



M 



0.6 



0,55 



6 





0,00 



1.10 





2,4 



-1.1 



Apr. 1962 to Dec 



1963 











Pacif 



c coasl 















San Diego, Calif, 



D 



3,0 



2.95 



2.79 



0.00 



0.90 



5.00 



5,70 



8.3 



-2,8 



1941-59 



Los Anprli-,s, Calif. (Outer Harbor) 



D 



2,8 



2.80 



2.72 



0.00 



0.90 



4,70 



5,40 



7.8 



-2,6 



1941-59 



S;ni Francisco, (jlif. (Golden Gate) 



D 



3.0 



3.30 



3.06 



0.20 " 



1.30 



5.30 



5.90 



8.6 



-2,5 



1941-59 



Humboldt Hay, Calif 



Astoria, Ong, (Tongue Point)' 



D 



3,4 



3,75 







0,00 



1.20 



5.70 



6.40 



9.i' 



-3.0' 



1962 



D 



4.3 



4,35 



3.03 



0,00 



1.10 



7.60 



8,30 



12,1 



-2.8 



1941-59 



Aberdeen, Wash. 



D 



5.5 



5,45 







0,00 



1,50 



9,40 



10.10 



14,9 



-2.9 



1955, 1955 



Port Townsend, Wash, 



D 



4.8 



5.10 







0,00 



2,50 



7,70 



8,40 



12,0' 



-4.5' 



1972-74 



Seattle, Wash. 



D 



5,6 



6,60 



6.2,-; 



0,00 



2,80 



10,40 



11,30 



14,8 



-4.7 



1941-59 



Ketchikan, Alaska 



D 



8,0 



7.95 







0,00 



1,50 



14,40 



15,30 



21,2 



-5.2 



1941-59 



Juneau, Ala.ska 



D 



8,6 



8.50 







0.00 



1,60 



15,40 



16,40 



23.20 



-5.20 



1966-72 



Sitka, Alaska 



D 



5.2 



5.30 







0.00 



1.40 



9,10 



9,90 



14.5 



-3,8 



1941-59 



(xirdova, Alaska 



D 



6.6 



6.45 







0.00 



1.40 



11,50 



12,40 



16.8 



-4,9 



1965-74 



Seldovia, Alaska 



D 



9.4 



9,35 







0.00 



1,60 



17,00 



17.80 



24.3 



-5,2 



1971-74 



Anchorage, Alaska 



D 



16.8 



15,25 







0.00 



2,20 



28,30 



29.00 



35.5' 



-6,5' 



1964-68 



Kndiak, Alaska 



D 



4.3 



4,30 







0,00 



1,00 



7,60 



8.50 



13,0' 



-4,0' 



1935-36 



Dutch Harbor. Alaska 



D 



2.2 



1,30 







0.00 



1.20 



3.40 



3.70 



6,6 



-2.7 



1935-38 



Sweeper Cove, Alaska (Adak l,<Jand) 



D 



2,1 



1.85 







0,00 











3.70 



7.0' 



-3,3 



1958-60; 1944, 1949 



Mas.^cre liav, Alaska (Attu Islajid) 



D 



1.9 



1.65 







0.00 









3,30 



7.0' 



-3,o' 



1950, 1952, 1960 



Nashagak Bay, ./Alaska (Clarks Pi) 



D 



10.3 



10.15 







0,00 



2.50 



17.80 



19.30 



24.5 



-5,0 



1958 



























Honolulu, Hawaii 



D 



0.8 



0.80 



— 



0.00 



0,20 



1,40 



1.90 



3,5 



-1.3 



1941-59 



Except as footnoted, chart datum is MLW for the Atlantic and gulf coasts and MLLW for the Pacific coast. 

 ^D = diurnal; M = mean. 



MLLW and MHHW were not routinely derived for Atlantic and gulf coast stations for the 1941-59 epoch used for establishing most of the datums. 

 '^Boston Low Water Datum (adopted about 1927). 



Estimated value. 



Data unavailable at the time of compilation. 

 'Oatumi and the mean ranpc for Philadelphia were revL««d in July 1979 based on observations for the period 1969-77. 

 ^Baltimore Low Water Datum (adopted 1922 by NOS and COB based on observations 1903-1921). 



Mean River Level. 

 *°Charlfston Low Water Datum (used since 1905 by NOS, and by COE in May 1929). 



Low Water Datum at the Presidio, Golden Gate, San Francisco^ is based on miscellaneous observations before 1907. 



47 



