U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 9447773 PUBLICATION DATE: 07/14/2015 Name: TULALIP, TULALIP BAY WA NOAA Chart: 18443 Latitude: 48° 3.9' N ( 48.06500) USGS Quad: TULALIP Longitude: 122° 17.3' W (-122.28800) To reach from the intersection of I-90 and I-5 in Seattle, proceed north to exit 199. Turn left on Marine Drive for 5.7 mi (9.2 km) turn left on 76th place NW 0.1 mi (0.2 km) to a left on an unnamed road, 0.25 mi (0.4 km) to a right into the marina parking lot. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 4 1935 DESIGNATION: 944 7773 4 MONUMENTATION: Tidal Station disk VM#: 20811 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: DP1176 SETTING CLASSIFICATION: Dam wall for fish hatchery OPUS PID: LATITUDE: 48° 3.9' N ( 48.06536) LONGITUDE: 122° 17.2' W (-122.28636) The bench mark is a disk set flush in the top of concrete dam for Tulalip Fish Hatchery, 36.51 m (119.8 ft) west of a power pole, 12.5 m (41.0 ft) east of sewer manhole, 4.60 m (15.1 ft) north of the centerline of road, and 0.52 m (1.7 ft) higher than the sidewalk.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 9447773 PUBLICATION DATE: 07/14/2015 Name: TULALIP, TULALIP BAY WA NOAA Chart: 18443 Latitude: 48° 3.9' N ( 48.06500) USGS Quad: TULALIP Longitude: 122° 17.3' W (-122.28800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: TIDAL BM 8 1974 DESIGNATION: 944 7773 TIDAL BM 8 MONUMENTATION: Tidal Station disk VM#: 20812 AGENCY: National Ocean Service (NOS) IDB PID#: DP1178 SETTING CLASSIFICATION: Conc wall of fish ladder OPUS PID: LATITUDE: 48° 3.9' N ( 48.06478) LONGITUDE: 122° 17.1' W (-122.28539) The bench mark is a disk set flush on top of the south wall of the fish ladder for the Tulalip Fish Hatchery, 8.03 m (26.3 ft) east of west end of fish ladder, 4.82 m (15.8 ft) north of a wood light pole, 1.80 m (5.9 ft) west of chain-link fence at east side of property, 0.25 m (0.8 ft) north of chain-link fence on south wall of fish ladder, and 0.65 m (2.1 ft) above ground. BENCH MARK STAMPING: TIDAL BM 7 1974 DESIGNATION: 944 7773 TIDAL BM 7 MONUMENTATION: Tidal Station disk VM#: 20813 AGENCY: National Ocean Service (NOS) IDB PID#: DP1177 SETTING CLASSIFICATION: Dam wall of fish hatchery OPUS PID: LATITUDE: 48° 3.9' N ( 48.06481) LONGITUDE: 122° 17.1' W (-122.28567) The bench mark is a disk set flush on top of the east dam wall for the Tulalip Fish Hatchery, 15.67 m (51.4 ft) NW of a power pole and electric meter, 12.60 m (0.7 ft) west of a wood light pole, and 3.14 m (10.3 ft) SW of SW support beam for lift platform.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 9447773 PUBLICATION DATE: 07/14/2015 Name: TULALIP, TULALIP BAY WA NOAA Chart: 18443 Latitude: 48° 3.9' N ( 48.06500) USGS Quad: TULALIP Longitude: 122° 17.3' W (-122.28800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5 1935 DESIGNATION: 944 7773 5 MONUMENTATION: Tidal Station disk VM#: 20814 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: DP1175 SETTING CLASSIFICATION: Flagpole foundation OPUS PID: LATITUDE: 48° 3.9' N ( 48.06525) LONGITUDE: 122° 17.1' W (-122.28581) The bench mark is a disk set flush in a concrete foundation for a now missing flagpole in the yard of an abandoned wood building with address 7615, 11.5 m (37.7 ft) east of east end of concrete dam, 7.48 m (24.5 ft) north of north edge of road, and 6.89 m (22.6 ft) NW of NW corner of building. BENCH MARK STAMPING: 7963 A 2013 DESIGNATION: 944 7773 A MONUMENTATION: Tidal Station disk VM#: 20815 AGENCY: National Ocean Service (NOS) IDB PID#: DP1174 SETTING CLASSIFICATION: Concrete stairs OPUS PID: LATITUDE: 48° 3.8' N ( 48.06264) LONGITUDE: 122° 16.8' W (-122.27936) The bench mark is a disk set flush in the top step of a concrete stairs between the bathrooms and Tulalip Fisheries building, 3.54 m (11.6 ft) west of a power pole, 1.95 m (6.4 ft) NE of N handrail of ramp to floating dock, and 1.05 m (3.4 ft) east of SE corner of Tulalip Fisheries building.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 9447773 PUBLICATION DATE: 07/14/2015 Name: TULALIP, TULALIP BAY WA NOAA Chart: 18443 Latitude: 48° 3.9' N ( 48.06500) USGS Quad: TULALIP Longitude: 122° 17.3' W (-122.28800) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 7963 B 2013 DESIGNATION: 944 7773 B MONUMENTATION: Tidal Station disk VM#: 20816 AGENCY: National Ocean Service (NOS) IDB PID#: DP1173 SETTING CLASSIFICATION: Concrete stairs OPUS PID#: DP1173 LATITUDE: 48° 3.7' N ( 48.06169) LONGITUDE: 122° 16.7' W (-122.27847) The bench mark is a disk set flush in bottom concrete step of stairs to boat ramp from south end of parking lot, 27.15 m (89.1 ft) south of top of ramp where it meets parking lot, 3.75 m (12.3 ft) NE of centerline of ramp, and 1.95 m (6.4 ft) NW of wood power and light pole.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 9447773 PUBLICATION DATE: 07/14/2015 Name: TULALIP, TULALIP BAY WA NOAA Chart: 18443 Latitude: 48° 3.9' N ( 48.06500) USGS Quad: TULALIP Longitude: 122° 17.3' W (-122.28800) T I D A L D A T U M S Tidal datums at TULALIP, TULALIP BAY based on: LENGTH OF SERIES: 4 MONTHS TIME PERIOD: August 2013 - November 2013 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 9447130 SEATTLE, PUGET SOUND Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 3.371 MEAN HIGH WATER MHW = 3.116 MEAN TIDE LEVEL MTL = 1.981 MEAN SEA LEVEL MSL = 1.974 MEAN LOW WATER MLW = 0.847 North American Vertical Datum NAVD88 = 0.622 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 4 1935 12.440 9.324 TIDAL BM 8 1974 6.386 3.270 TIDAL BM 7 1974 5.663 2.547 5 1935 13.254 10.138 7963 A 2013 5.702 2.586 7963 B 2013 4.554 1.438
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 9447773 PUBLICATION DATE: 07/14/2015 Name: TULALIP, TULALIP BAY WA NOAA Chart: 18443 Latitude: 48° 3.9' N ( 48.06500) USGS Quad: TULALIP Longitude: 122° 17.3' W (-122.28800) 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.