U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8633777 PUBLICATION DATE: 08/11/2003 Name: SAXIS, STARLING CREEK VA NOAA Chart: 12228 Latitude: 37° 55.3' N ( 37.92170) USGS Quad: SAXIS Longitude: 75° 43.7' W ( -75.72830) To reach the tidal bench marks from the post office in Saxis, proceed WSW on State Road 695 (Saxis Road) for 1.1 km (0.7 mi) to the intersection with State Road 817 (Harbor Road), turn left and continue SE on Harbor Road for 0.3 km (0.2 mi) to a small boat harbor. The bench marks are along Harbor Road, at the boat basin, and at the intersection of State Roads 695 and 817. The tide gage and staff were on the wooden bulkhead near the fourth finger pier from the NE, opposite the Shore Seafood Restaurant. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 3777 C 1988 DESIGNATION: 863 3777 C MONUMENTATION: Tidal Station disk VM#: 4869 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID#: BBCV66 LATITUDE: 37° 55.3' N ( 37.92170) LONGITUDE: 75° 43.7' W ( -75.72830) The primary bench mark is a disk located between Harbor Road and the wooden bulkhead at the first finger pier from the SW, 7.62 m (25.0 ft) SSE of the centerline of Harbor Road, 3.96 m (13.0 ft) NNW of the bulkhead, and 1.07 m (3.5 ft) NNW of power pole #43050/76916. The bench mark is 0.06 m (0.2 ft) below the ground, crimped to the top of a stainless steel rod driven 12.2 m (40 ft) to refusal, and encased in a 4-inch PVC pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8633777 PUBLICATION DATE: 08/11/2003 Name: SAXIS, STARLING CREEK VA NOAA Chart: 12228 Latitude: 37° 55.3' N ( 37.92170) USGS Quad: SAXIS Longitude: 75° 43.7' W ( -75.72830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3777 A 1988 DESIGNATION: 863 3777 A MONUMENTATION: Tidal Station disk VM#: 4867 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 37° 55.3' N ( 37.92170) LONGITUDE: 75° 43.7' W ( -75.72830) The bench mark is a disk set flush in the top of a concrete monument near the fourth finger pier from the NE end of the basin, 4.97 m (16.3 ft) north of the piling on the west side of the fourth finger pier from the NE end of the basin, 5 m (16 ft) SE of the centerline of Harbor Road, 1.07 m (3.5 ft) NW of power pole #591J, and 0.06 m (0.2 ft) below the ground. BENCH MARK STAMPING: 3777 B 1988 DESIGNATION: 863 3777 B MONUMENTATION: Tidal Station disk VM#: 4868 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Concrete monument OPUS PID: LATITUDE: 37° 55.3' N ( 37.92170) LONGITUDE: 75° 43.7' W ( -75.72830) The bench mark is a disk set flush in the top of a concrete monument between Harbor Road and the wooden bulkhead of the basin, 5.79 m (19.0 ft) SSE of the centerline of Harbor Road, 4.18 m (13.7 ft) NNW of the bulkhead, and 0.84 m (2.75 ft) NNW of power pole #591G/6, and 0.06 m (0.2 ft) below the ground.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8633777 PUBLICATION DATE: 08/11/2003 Name: SAXIS, STARLING CREEK VA NOAA Chart: 12228 Latitude: 37° 55.3' N ( 37.92170) USGS Quad: SAXIS Longitude: 75° 43.7' W ( -75.72830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3777 D 1988 DESIGNATION: 863 3777 D MONUMENTATION: Tidal Station disk VM#: 4870 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 37° 55.3' N ( 37.92170) LONGITUDE: 75° 43.7' W ( -75.72830) The bench mark is a disk located at the intersection of Route 695 and Harbour Road (Route 817), 6.40 m (21.0 ft) east of the centerline of Harbor Road, 3.60 m (11.8 ft) SE of a stop sign at the intersection, and 1.52 m (5.0 ft) SSE of power pole #76/591. The bench mark is set 6 cm (0.2 ft) below the ground, crimped to the top of a stainless steel rod driven 11.0 m (36 ft) to refusal, and encased in a 4-inch PVC pipe. BENCH MARK STAMPING: 3777 E 1988 DESIGNATION: 863 3777 E MONUMENTATION: Tidal Station disk VM#: 4871 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 37° 55.3' N ( 37.92170) LONGITUDE: 75° 43.7' W ( -75.72830) The bench mark is a disk located along the south side of Route 695, 61 m (200 ft) NE of the intersection of Route 695 and Harbour Road (Route 817), 17 m (56 ft) north of power pole #53024/76960, 5.33 m (17.5 ft) east of the centerline of a driveway, 3.35 m (11.0 ft) south of the south side of Route 695, and 2.74 m (9.0 ft) SSE of power pole #589/283. The bench mark is set 6 cm (0.2 ft) below the ground, crimped to the top of a stainless steel rod driven 11.0 m (36 ft) to refusal, and encased in a 4-inch PVC pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8633777 PUBLICATION DATE: 08/11/2003 Name: SAXIS, STARLING CREEK VA NOAA Chart: 12228 Latitude: 37° 55.3' N ( 37.92170) USGS Quad: SAXIS Longitude: 75° 43.7' W ( -75.72830) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 3777 F 1988 DESIGNATION: 863 3777 F MONUMENTATION: Tidal Station disk VM#: 4872 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 37° 55.3' N ( 37.92170) LONGITUDE: 75° 43.7' W ( -75.72830) The bench mark is a disk located in a grassy area near the entrance to the small boat basin, 23.47 m (77.0 ft) south of Harbor Road, 8.44 m (27.7 ft) west of a piling at the west end of the wooden bulkhead, and 0.91 m (3.0 ft) north of power pole #591E/4. The bench mark is set level with the ground, crimped to the top of a stainless steel rod driven 13.4 m (44 ft) to refusal, and encased in a 6-inch PVC pipe. BENCH MARK STAMPING: 3777 G 1988 DESIGNATION: 863 3777 G MONUMENTATION: Tidal Station disk VM#: 4873 AGENCY: National Ocean Service (NOS) IDB PID#: SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 37° 55.3' N ( 37.92170) LONGITUDE: 75° 43.7' W ( -75.72830) The bench mark is a disk located NW of the intersection of Route 695 and Harbour Road (Route 817), near the wooden bulkhead facing Pocomoke Sound, 13.17 m (43.2 ft) NW of power pole #42981/76966, 7.62 m (25.0 ft) ESE of the wooden bulkhead, and 1.01 m (3.3 ft) ESE of power pole #42978/76970. The bench mark is set level with the ground, crimped to the top of a stainless steel rod driven 12.2 m (40 ft) to refusal, and encased in a 6-inch PVC pipe.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8633777 PUBLICATION DATE: 08/11/2003 Name: SAXIS, STARLING CREEK VA NOAA Chart: 12228 Latitude: 37° 55.3' N ( 37.92170) USGS Quad: SAXIS Longitude: 75° 43.7' W ( -75.72830) T I D A L D A T U M S Tidal datums at SAXIS, STARLING CREEK based on: LENGTH OF SERIES: 4 MONTHS TIME PERIOD: August 1988 - November 1988 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8632200 KIPTOPEKE, CHESAPEAKE BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.774 MEAN HIGH WATER MHW = 0.724 MEAN TIDE LEVEL MTL = 0.383 MEAN SEA LEVEL MSL = 0.381 MEAN LOW WATER MLW = 0.042 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 3777 C 1988 1.389 0.665 3777 A 1988 1.430 0.706 3777 B 1988 1.393 0.669 3777 D 1988 1.442 0.718 3777 E 1988 1.471 0.747 3777 F 1988 1.270 0.546 3777 G 1988 1.724 1.000
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8633777 PUBLICATION DATE: 08/11/2003 Name: SAXIS, STARLING CREEK VA NOAA Chart: 12228 Latitude: 37° 55.3' N ( 37.92170) USGS Quad: SAXIS Longitude: 75° 43.7' W ( -75.72830) D E F I N I T I O N S Mean Sea Level (MSL) is a tidal datum determined over a 19-year National Tidal Datum Epoch. It pertains to local mean sea level and should not be confused with the fixed datums of North American Vertical Datum of 1988 (NAVD88). NAVD88 is a fixed datum derived from a simultaneous, least squares, minimum constraint adjustment of Canadian/Mexican/United States leveling observations. Local mean sea level observed at Father Point/Rimouski, Canada was held fixed as the single initial constraint. NAVD88 replaces NGVD29 as the national standard geodetic reference for heights. Bench mark elevations relative to NAVD88 are available from NGS through the World Wide Web at National Geodetic Survey. NGVD29 is a fixed datum adopted as a national standard geodetic reference for heights but is now considered superseded. NGVD29 is sometimes referred to as Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological Survey Topographic Quads. NGVD29 was originally derived from a general adjustment of the first-order leveling networks of the U.S. and Canada after holding mean sea level observed at 26 long term tide stations as fixed. Numerous local and wide-spread adjustments have been made since establishment in 1929. Bench mark elevations relative to NGVD29 are available from the National Geodetic Survey (NGS) data base via the World Wide Web at National Geodetic Survey. NAVD88 and NGVD29 are fixed geodetic datums whose elevation relationships to local MSL and other tidal datums may not be consistent from one location to another. The Vertical Mark Number (VM#) and PID# shown on the bench mark sheet are unique identifiers for bench marks in the tidal and geodetic databases, respectively. Each bench mark in either database has a single, unique VM# and/or PID# assigned. Where both VM# and PID# are indicated, both tidal and geodetic elevations are available for the bench mark listed. The NGS's Integrated Data Base (IDB PID) provides geodetic datum based on traditionally leveled and bluebooked ties to the National Spatial Reference System(NSRS) https://www.ngs.noaa.gov/datasheets/. The NGS Online Positioning User Service (OPUS PID) provides geodetic datum based on GPS position & tie it to the NSRS https://www.ngs.noaa.gov/OPUS/. The NAVD88 elevation is shown on the Elevations of Tidal Datums Table Referred to MLLW only when two or more of the bench marks listed have NAVD88 elevations. The NAVD88 elevation relationship shown in the table is derived from an average of several bench mark elevations relative to tide station datum. As a result of this averaging, NAVD88 bench mark elevations computed indirectly from the tidal datums elevation table may differ slightly from NAVD88 elevations listed for each bench mark in the NGS database.