U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 5 Station ID: 9445958 PUBLICATION DATE: 07/12/2023 Name: BREMERTON WA NOAA Chart: 18449 Latitude: 47° 33.7' N ( 47.56170) USGS Quad: BREMERTON EAST Longitude: 122° 37.4' W (-122.62300) To reach the tidal bench marks from the intersection of Burwell St (304) and Pacific Ave. in Bremerton, proceed 0.19 km (0.12 mi) S along Pacific Ave. to the Washington State Ferry Terminal Landing. The tidal bench marks are from the Bremerton Ferry Office to the maintenance shed which houses the tide station electronics. Most marks are located along the ferry ramps and infrastructure underneath the elevated departure/arrival deck above. The remote met is located on the northeast end of the roof of the Kitsap Transit building above the Washington State Ferry Port. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5958 C 2021 DESIGNATION: 944 5958 C MONUMENTATION: Tidal Station disk VM#: 23926 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Concrete footing supporting a column OPUS PID: LATITUDE: 47° 33.8' N ( 47.56269) LONGITUDE: 122° 37.5' W (-122.62483) The bench mark is set into the top of a concrete footing supporting a column which supports the arrival/departure deck for pedestrian ferry traffic, 24.1 m (79.1 ft) south of light pole #12, 7.5 m (24.6 ft) west of light pole #13, 0.23 m (0.8 ft) south of the north column leading up to the stairs for the Bremerton ferry terminal.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 5 Station ID: 9445958 PUBLICATION DATE: 07/12/2023 Name: BREMERTON WA NOAA Chart: 18449 Latitude: 47° 33.7' N ( 47.56170) USGS Quad: BREMERTON EAST Longitude: 122° 37.4' W (-122.62300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5958 B 2021 DESIGNATION: 944 5958 B MONUMENTATION: Tidal Station disk VM#: 23927 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Curb OPUS PID: LATITUDE: 47° 33.7' N ( 47.56236) LONGITUDE: 122° 37.5' W (-122.62497) The mark is set into the top of eastern curb of the road leading to slip #2, 25.5 m (83.7 ft) NW of the vehicle arm for slip #2, 13.2 m (43.3 ft) north of a large green breaker room, 2.74 m (9.0 ft) south of first light pole of slip #2. BENCH MARK STAMPING: 5958 A 2021 DESIGNATION: 944 5958 A MONUMENTATION: Tidal Station disk VM#: 23928 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: OPUS PID: LATITUDE: 47° 33.7' N ( 47.56208) LONGITUDE: 122° 37.5' W (-122.62539) The mark is set in the top of the threshold of a rollup door for the ferry terminal maintenance shed, 23.3 m (76.4 ft) SW of a green breaker room, 17.98 m (59.0 ft) SE of a large white generator, 0.19 m (0.6 ft) NW of the SE side of the rollup door to the maintenance shed.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 5 Station ID: 9445958 PUBLICATION DATE: 07/12/2023 Name: BREMERTON WA NOAA Chart: 18449 Latitude: 47° 33.7' N ( 47.56170) USGS Quad: BREMERTON EAST Longitude: 122° 37.4' W (-122.62300) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5958 D 2021 DESIGNATION: 944 5958 D MONUMENTATION: Bench Mark disk VM#: 23929 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Retaining wall OPUS PID: LATITUDE: 47° 33.8' N ( 47.56286) LONGITUDE: 122° 37.5' W (-122.62519) The mark is set on top of the west barrier wall separating the ferry holding area from Burwell st., 6.8 m (22.3 ft) SE of a fire hydrant in ferry lane # 13, 4.2 m (13.8 ft) SSW of the centerline of Burwell st., 0.33 m (1.1 ft) south of the handrail on the barrier and 0.94 m (3.1 ft) above the asphalt holding area. BENCH MARK STAMPING: 5958 E 2021 DESIGNATION: 944 5958 E MONUMENTATION: Tidal Station disk VM#: 23930 AGENCY: National Ocean Service IDB PID#: SETTING CLASSIFICATION: Sidewalk OPUS PID: LATITUDE: 47° 33.8' N ( 47.56333) LONGITUDE: 122° 37.6' W (-122.62589) The mark is set in the corner of a pedestrian ramp leading from the ferry holding area to Burwell st., near the ferry terminal office building, 6.05 m (19.8 ft) SSW of middle the walkway over the Burwell st. Tunnel, 2.7 m (8.9 ft) south of the south corner of the ferry office building, 0.4 m (1.3 ft) NE of the corner of the walkway.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 5 Station ID: 9445958 PUBLICATION DATE: 07/12/2023 Name: BREMERTON WA NOAA Chart: 18449 Latitude: 47° 33.7' N ( 47.56170) USGS Quad: BREMERTON EAST Longitude: 122° 37.4' W (-122.62300) T I D A L D A T U M S Tidal datums at BREMERTON based on: LENGTH OF SERIES: 1 YEAR TIME PERIOD: September 2021 - August 2022 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9447130 SEATTLE, PUGET SOUND Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: HIGHEST OBSERVED WATER LEVEL (12/27/2022) = 4.740 MEAN HIGHER HIGH WATER MHHW = 3.571 MEAN HIGH WATER MHW = 3.298 MEAN TIDE LEVEL MTL = 2.084 MEAN SEA LEVEL MSL = 2.077 MEAN LOW WATER MLW = 0.870 MEAN LOWER LOW WATER MLLW = 0.000 LOWEST OBSERVED WATER LEVEL (04/29/1998) = -3.628 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5958 C 2021 6.530 3.232 5958 B 2021 5.794 2.496 5958 A 2021 5.506 2.208 5958 D 2021 6.323 3.025 5958 E 2021 10.041 6.743
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 5 Station ID: 9445958 PUBLICATION DATE: 07/12/2023 Name: BREMERTON WA NOAA Chart: 18449 Latitude: 47° 33.7' N ( 47.56170) USGS Quad: BREMERTON EAST Longitude: 122° 37.4' W (-122.62300) 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.