Tidal Datums - Published			updated 2005186+1853 by duff

Station Information

To reach the gauge and benchmarks from the intersection of John F. Kennedy Causeway bridge and the Gulf Intercoastal Waterway (GIWW) proceed south by boat down the GIWW for approximately 30 miles. The gauge is located on a 6' x 6' platform just north of USCG bouy no. 57 on the east edge of the GIWW. The benchmarks are located on the spoil island east of the gauge platform.

Elevations

Status	=	Published
Date Computed	=	05.02.2003
Length of Observations	=	64
Time Period	=	2/91-8/96
Control Station	=	017 (1983-2001)
Accuracy	=	unstated
Note: This station is in an area that the National Ocean Service has designated as non-tidal for datum computation purposes.

	Meters	Feet
Mean Water Level (MWL)	1.594	5.23
Station Datum (STND)	0.000	0.00

	Meters above
Bench Mark Stamping	MWL	STND
6687 E 1990	1.152	2.746
6687 D 1990	0.842	2.436
6687 C 1990	0.766	2.360
6687 B 1990	0.960	2.554
6687 A 1990	1.113	2.707

	Feet above
Bench Mark Stamping	MWL	STND
6687 E 1990	3.78	9.01
6687 D 1990	2.76	7.99
6687 C 1990	2.51	7.74
6687 B 1990	3.15	8.38
6687 A 1990	3.65	8.88

Bench Mark Descriptions

BENCH MARK STAMPING: 6687 E 1990
MONUMENTATION: deep rod
AGENCY:
The benchmark is a brass disk set atop a stainless steel rod driven 44 feet to refusal and encased in a pvc pipe without a kickblock. It is located 76.6 m (251.2 ft) WSW of benchmark 6687 D 1990, flush with the ground, and marked by an orange fiberglass witness post.

BENCH MARK STAMPING: 6687 D 1990
MONUMENTATION: deep rod
AGENCY:
The benchmark is a brass disk set atop a stainless steel rod driven 40 feet to refusal and encased in a pvc pipe without a kickblock. It is located 113.0 m (370.8 ft) SSW of benchmark 6687 C 1990, is flush with the ground, and is marked by an orange fiberglass witness post.

BENCH MARK STAMPING: 6687 C 1990
MONUMENTATION: deep rod
AGENCY:
The benchmark is a brass disk set atop a stainless steel rod driven 40 feet to refusal and encased in a 6 inch pvc pipe without a kickblock. The benchmark is 76.4 m with an orange fiberglass witness post.

BENCH MARK STAMPING: 6687 B 1990
MONUMENTATION: deep rod
AGENCY:
The benchmark is a brass disk set atop a stainless steel rod driven 44 feet to refusal and encased in a 6 inch pvc pipe without a kickblock. It is located 116 m (380.4 ft) SSW of BM 6687 A 1990 and is marked by an orange fiberglass witness post.

BENCH MARK STAMPING: 6687 A 1990
MONUMENTATION: deep rod
AGENCY:
The benchmark is a brass disk set atop a stainless steel rod driven 51 feet to refusal and encased in a 6 inch pvc pipe without a kickblock. It is located on the spoil island east of the gauge and just south of Yarborough Pass cut approximately 230 m (750 ft) SE of the gauge platform, about 30 m (100 ft) east of the water's edge, flush with the ground and marked with an orange fiberglass witness post.