Tidal Datums - NOAA			updated 2009036+2203 by jdavis

Station Information

TO REACH THE TIDE STATION FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 NORTH AND TURN NE ON CONCHO. THE MARK IS THE LEVELING POINT OF THE OLD AQUATRAK CAL TUBE. THE WELL IS LOCATED ON THE SOUTHERNMOST PIER IN THE ROCKPORT YACHT BASIN WITHIN THE FENCED TEXAS PARKS AND WILDLIFE COMPOUND.

Elevations

These datums have been provided to TCOON by the National Ocean Service. Official values for this station should be retrieved from NOS directly.

Status	=	NOAA
Date Computed	=	04.21.2003
Length of Observations	=	19 years
Time Period	=	1983-2001
Control Station	=	1st Reduction (1983-2001)
Accuracy	=	unstated

	Meters	Feet
Mean Higher High Water (MHHW)	1.967	6.45
Mean High Water (MHW)	1.966	6.45
Mean Tide Level (MTL)	1.912	6.27
Mean Sea Level (MSL)	1.914	6.28
Mean Low Water (MLW)	1.857	6.09
Mean Lower Low Water (MLLW)	1.856	6.09
North American Vertical Datum 1988 (NAVD88)	1.677	5.50
Station Datum (STND)	0.000	0.00

	Meters above
Bench Mark Stamping	MHHW	MHW	MTL	MSL	MLW	MLLW	NAVD88	STND
NO 11 1975	1.435	1.436	1.490	1.488	1.545	1.546	1.725	3.402
4770 A 2002	1.239	1.240	1.294	1.292	1.349	1.350	1.529	3.206
NO 3 1934	1.111	1.112	1.166	1.164	1.221	1.222	1.401	3.078
NO 12 1975	1.238	1.239	1.293	1.291	1.348	1.349	1.528	3.205
NO 10 1975	0.874	0.875	0.929	0.927	0.984	0.985	1.164	2.841
(no stamping)	1.532	1.533	1.587	1.585	1.642	1.643	1.822	3.499
8 1948	1.418	1.419	1.473	1.471	1.528	1.529	1.708	3.385
4770 C 2004	1.423	1.424	1.478	1.476	1.533	1.534	1.713	3.390
NO 4 1948	0.840	0.841	0.895	0.893	0.950	0.951	1.130	2.807
7 1948	0.844	0.845	0.899	0.897	0.954	0.955	1.134	2.811
4770 B 2004	1.030	1.031	1.085	1.083	1.140	1.141	1.320	2.997

	Feet above
Bench Mark Stamping	MHHW	MHW	MTL	MSL	MLW	MLLW	NAVD88	STND
NO 11 1975	4.71	4.71	4.89	4.88	5.07	5.07	5.66	11.16
4770 A 2002	4.06	4.07	4.25	4.24	4.43	4.43	5.02	10.52
NO 3 1934	3.65	3.65	3.83	3.82	4.01	4.01	4.60	10.10
NO 12 1975	4.06	4.06	4.24	4.24	4.42	4.43	5.01	10.52
NO 10 1975	2.87	2.87	3.05	3.04	3.23	3.23	3.82	9.32
(no stamping)	5.03	5.03	5.21	5.20	5.39	5.39	5.98	11.48
8 1948	4.65	4.66	4.83	4.83	5.01	5.02	5.60	11.11
4770 C 2004	4.67	4.67	4.85	4.84	5.03	5.03	5.62	11.12
NO 4 1948	2.76	2.76	2.94	2.93	3.12	3.12	3.71	9.21
7 1948	2.77	2.77	2.95	2.94	3.13	3.13	3.72	9.22
4770 B 2004	3.38	3.38	3.56	3.55	3.74	3.74	4.33	9.83

Bench Mark Descriptions

BENCH MARK STAMPING: NO 11 1975
MONUMENTATION:
AGENCY:
TO REACH THE BENCH MARK FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 NORTH. THE BENCH MARK IS LOCATED ON THE WEST SIDE OF BUSINESS 35 BETWEEN NORTH ST. AND NAVIGATION CIR. SET FLUSH ON TOP OF A RETAINING WALL AT THE EAST SIDE OF THE PARKING LOT FOR THE WESTERN AUTO STORE, 15 M (49.2 FT) WEST OF THE CENTERLINE OF BUSINESS 35 AND 14 M (45.9 FT) NORTH OF A DRIVE BESIDE WESTERN AUTO, 0.91 M (2.99 FT) SOUTH OF THE NE CORNER OF THE RETAINING WALL, AND ABOUT 0.49 M (1.608 FT) ABOVE THE SIDEWALK.

BENCH MARK STAMPING: 4770 A 2002
MONUMENTATION: 3D Rod Mark
AGENCY:
TO REACH THE BENCH MARK FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 (BROADWAY ST.) NORTH AND TURN NE ON CONCHO. THE 3D ROD MARK IS LOCATED AT THE ROCKPORT YACHT BASIN 27.5 M (90.2 FT) NNW OF A UTILITY POLE MARKED "4", 22.3 M (73.2 FT) ENE OF A UTILITY POLE MARKED "3", 18.3 M (60.0 FT) SW OF A UTILITY POLE MARKED "G70" IN THE CHAMBERS AND VETERANS MEMORIAL/TEXAS MARITIME MUSEUM PROPERTY, AND 7.60 M (24.93 FT) SOUTH OF THE SOUTHERNMOST CORNER OF "MARGARET SURUST FOUNDATION AND HEB" MONUMENT AND ENCASED IN A 6 INCH PVC PIPE WITH A CONCRETE KICKBLOCK.

BENCH MARK STAMPING: NO 3 1934
MONUMENTATION:
AGENCY:
TO REACH THE BENCH MARK FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 NORTH. THE BENCH MARK IS LOCATED ON THE WEST SIDE OF BUSINESS 35 IMMEDIATELY AFTER NORTH ST. SET HORIZONTALLY IN THE CONCRETE SIDEWALK IN FRONT OF A STONE AND BRICK BUILDING, OWNED BY L. M. BRACHT, 1.4 M (4.6 FT) SOUTH OF THE NE CORNER AND 0.18 CM EAST OF THE EAST WALL OF THE BUILDING.

BENCH MARK STAMPING: NO 12 1975
MONUMENTATION:
AGENCY:
TO REACH THE BENCH MARK FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 NORTH AND TURN WEST ON NORTH STREET. THE BENCH MARK IS SET IN THE TOP OF THE SIDEWALK AT THE NE CORNER OF THE INTERSECTION OF MAGNOLIA AND NORTH STREETS, 15.5 M (50.9 FT) WEST OF THE SW CORNER OF THE BUILDING AT 1008 EAST NORTH STREET, 12.5 M (41.0 FT) EAST OF THE CENTERLINE OF MAGNOLIA STREET, 8.8 M (28.9 FT) NORTH OF THE CENTERLINE OF NORTH STREET, AND 0.15 M (0.49 FT) ABOVE THE STREET LEVEL.

BENCH MARK STAMPING: NO 10 1975
MONUMENTATION: DJ
AGENCY:
TO REACH THE PRIMARY BENCH MARK FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 NORTH AND TURN NE ON CONCHO. THE PRIMARY BENCH MARK IS LOCATED AT THE ROCKPORT YACHT BASIN, SET FLUSH IN THE CENTER OF THE CONCRETE SEAWALL AT THE NORTH END OF THE YACHT BASIN, 11.13 M (36.52 FT) SE OF THE CENTERLINE OF THE STREET AROUND THE YACHT BASIN, 5.24 M (17.19 FT) NE OF THE NE CORNER OF BEA'S BAIT STAND, AND 2.13 M (6.99 FT) NE OF A WHITE ELECTRICAL BOX FOR BOAT SLIP NO. 24 AND 25. This benchmark has been destroyed.

BENCH MARK STAMPING: (no stamping)
MONUMENTATION:
AGENCY:
AT THE ROCKPORT YACHT BASIN, THE BENCH MARK IS A DISK SET IN THE TOP OF A CONCRETE POST, AT THE NW CORNER OF THE ROCKPORT YACHT BASIN, IN THE SW PORTION OF A SMALL CITY PARK AND PICNIC AREA, 22.19 M (72.80 FT) NW OF A WHITE FLAG POLE, 17.71 M (58.10 FT) NORTH OF A MANHOLE ON THE EAST SIDE OF HIGHWAY 35, AND 15.21 M (49.90 FT) EAST OF THE CENTERLINE OF HIGHWAY 35, AND 0.15 M (0.49 FT) ABOVE GROUND LEVEL. THE BENCH MARK DISK HAS NO STAMPING.

BENCH MARK STAMPING: 8 1948
MONUMENTATION:
AGENCY:
TO REACH THE BENCH MARK FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 NORTH AND TURN NE ON CONCHO. THE BENCH MARK IS LOCATED AT THE ROCKPORT YACHT BASIN SET IN THE TOP OF THE CONCRETE FOUNDATION OF AN ABANDONED LAMP POST AT THE NE SIDE OF THE ROCKPORT YACHT BASIN, 37 M (121.4 FT) EAST OF THE YACHT BASIN SEAWALL, 23 M (75.5 FT) WEST OF THE THIRD POWER LINE POLE FROM ARANSAS BAY, AND 4 M (13.1 FT) EAST OF THE FOURTH POWER LINE POLE FROM THE NE CORNER OF THE BASIN. THIS WILL BECOME THE NEW PBM SINCE 0513 877 4770 TIDAL 4 HAS BEEN DISTURBED AND THERE IS MORE THAN A 6MM DIFFERENCE FROM PREVIOUS LEVELS.

BENCH MARK STAMPING: 4770 C 2004
MONUMENTATION: Tidal station disk
AGENCY:
TO REACH THE BENCHMARK FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 NOTH AND TURN ON E CONCHO STREET. THE BENCHMARK IS LOCATED AT THE VERTERANS MEMORIAL PARK AREA BETWEEN BROADWAY STREET AND THE ROCKPORT YACHT BASIN. THE MARK IS A SURFACE DISK SET INTO THE NORTHEAST CORNER OF THE MIDDLE OF THREE CONCRETE PICNIC PAVILLIONS. THE MARK IS 29.4M WEST OF A UTILITY POLE MARKED "1", 17.9M EAST OF THE EASTERNMOST CURB OF BROADWAY ST., 16.7M NNW OF THE NORTHERMOST CORNER OF A MEMORIAL GRANITE BENCH MARKED "ROCKPORT VFW POST 3904, MAY 30 1994". THE MARK IS 0.85M SOUTH OF THE NORTHERMOST CORNER OF THE MIDDLE CONCRETE PICNIC PAVILLION. THE MARK IS A BRASS NOS SURFACE DISK.

BENCH MARK STAMPING: NO 4 1948
MONUMENTATION:
AGENCY:
TO REACH THE BENCH MARK FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 NORTH AND TURN NE ON CONCHO. THE BENCH MARK IS LOCATED AT THE ROCKPORT YACHT BASIN SET FLUSH IN THE TOP OF THE CONCRETE SEAWALL ON THE EAST SHORE OF THE ROCKPORT YACHT BASIN AND NEAR THE SE END OF THE SEAWALL, 10.61 M (34.81 FT) NORTH OF THE NORTH EDGE OF THE PIER LEADING TO THE GAGE HOUSE, 7.32 M (24.02 FT) WEST OF THE WEST END OF THE TEXAS PARKS AND WILD LIFE MARINE LABORATORY BUILDING, AND 0.3 M (1.0 FT) SOUTH OF A CHAIN LINK FENCE WITH A GATE.

BENCH MARK STAMPING: 7 1948
MONUMENTATION:
AGENCY:
DESTROYED

BENCH MARK STAMPING: 4770 B 2004
MONUMENTATION: Metal rod
AGENCY:
TO REACH THE BENCH MARK FROM FM 1069 AND BUSINESS 35 IN ROCKPORT, FOLLOW BUSINESS 35 (BROADWAY ST.) NORTH AND TURN NE ON CONCHO. THE 3D ROD MARK IS LOCATED IN THE VETERAN'S MEMORIAL PARK IN BETWEEN BROADWAY AND ROCKPORT HARBOR. THE MARK IS LOCATED 29.9M WEST OF A UTILITY POLE MARKED "2", 17.6M NORTH OF THE NORTHERMOST CORNER OF THE NORTHERNMOST OF THREE CONCRETE PICNIC PAVILLIONS, AND 12.1M SSE OF THE CENTERLINE OF E CONCHO ST. THE BENCHMARK IS A STAINLESS STEEL ROD DRIVEN 52 FEET (15.8 M) AND IS ENCASED IN A 6 INCH PVC PIPE WITH CONCRETE KICKBLOCK AND APPROX. 0.3M BELOW GRADE. MARK IS COVERED WITH GRASS (MUST BE DUG OUT).