U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Datums Page Page 1 of 6 Station ID: 8725902 PUBLICATION DATE: 05/25/2011 Name: SHAKETT CREEK FL NOAA Chart: 11424 Latitude: 27° 7.6' N ( 27.12670) USGS Quad: VENICE Longitude: 82° 26.8' W ( -82.44670) To reach the tidal bench marks from the intersection of U.S. Highway 41 and Pocono Trail, proceed 2.7 km (1.7 mi) to Buena Vista Drive, then 0.6 km (0.4 mi) north on Buena Vista Drive to Ceil Drive, proceed 0.2 km (0.2 mi) on Ceil Drive to house #437. The bench marks are located along Ceil Drive and the seawall behind the houses. The tide gage and staff were located on a private dock behind house #437. T I D A L B E N C H M A R K S PRIMARY BENCH MARK STAMPING: 5902 C 1977 DESIGNATION: 872 5902 C TIDAL MONUMENTATION: Tidal Station disk VM#: 6099 AGENCY: National Ocean Survey (NOS) IDB PID#: AG7755 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 27° 7.5' N ( 27.12500) LONGITUDE: 82° 27.0' W ( -82.45000) The primary bench mark is a disk 36.58 m (120.0 ft) west of Bench Mark 5902 A 1977, 31.09 m (102.0 ft) north of the centerline of Ceil Drive, 21.58 m (70.8 ft) north of power pole #14, and 4.48 m (14.7 ft) south of the water's edge. The bench mark is crimped to the top of a copper-clad steel rod driven an unspecified depth to refusal, and encased in a PVC pipe and concrete kickblock.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 2 of 6 Station ID: 8725902 PUBLICATION DATE: 05/25/2011 Name: SHAKETT CREEK FL NOAA Chart: 11424 Latitude: 27° 7.6' N ( 27.12670) USGS Quad: VENICE Longitude: 82° 26.8' W ( -82.44670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: 5902 B 1977 DESIGNATION: 872 5902 B TIDAL MONUMENTATION: Tidal Station disk VM#: 6098 AGENCY: National Ocean Survey (NOS) IDB PID#: AG7756 SETTING CLASSIFICATION: Concrete sea wall OPUS PID: LATITUDE: 27° 7.5' N ( 27.12500) LONGITUDE: 82° 27.0' W ( -82.45000) The bench mark is a disk set flush in the concrete seawall, 34.75 m (114.0 ft) NW of power pole #14-1, 19.20 m (63.0 ft) west of Bench Mark 5902 C 1977, and 2.01 m (6.6 ft) south of the waters edge. BENCH MARK STAMPING: 5902 F 1977 DESIGNATION: 872 5902 F TIDAL MONUMENTATION: Tidal Station disk VM#: 6121 AGENCY: National Ocean Survey (NOS) IDB PID#: AG7752 SETTING CLASSIFICATION: Copper-clad steel rod OPUS PID: LATITUDE: 27° 7.5' N ( 27.12500) LONGITUDE: 82° 27.0' W ( -82.45000) The bench mark is a disk located 35.66 m (117.0 ft) SE of Bench Mark 5902 B 1977, 8 m (26 ft) NW of the centerline of Ceil Drive, and 3.75 m (12.3 ft) SE of power pole #14-1.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 3 of 6 Station ID: 8725902 PUBLICATION DATE: 05/25/2011 Name: SHAKETT CREEK FL NOAA Chart: 11424 Latitude: 27° 7.6' N ( 27.12670) USGS Quad: VENICE Longitude: 82° 26.8' W ( -82.44670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: W 699 2007 DESIGNATION: W 699 MONUMENTATION: Flange-encased Rod VM#: 19931 AGENCY: National Geodetic Survey (NGS) IDB PID#: DL2733 SETTING CLASSIFICATION: Stainless steel rod OPUS PID: LATITUDE: 27° 7.5' N ( 27.12481) LONGITUDE: 82° 27.3' W ( -82.45436) The bench mark is a stainless steel rod located 6.9 m (22.7 ft) east of the west end of the center median, 5.9 m (19.2 ft)north of the approximate centerline of Albee Road eastbound lanes, 4.8 m (15.6 ft) south of the approximate centerline of Albee Road westbound lanes, and 0.4 m (1.4 ft) east of a carsonite witness post. The bench mark is a stainless steel rod driven to refusal at a depth of 5.6 m (18.3 ft) with an NGS logo cap flush with the ground and about 0.2 m (0.8 ft) above the level of Albee Road, the datum point being recessed 0.03 m (0.1 ft) below the level of the NGS logo cap.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 4 of 6 Station ID: 8725902 PUBLICATION DATE: 05/25/2011 Name: SHAKETT CREEK FL NOAA Chart: 11424 Latitude: 27° 7.6' N ( 27.12670) USGS Quad: VENICE Longitude: 82° 26.8' W ( -82.44670) T I D A L B E N C H M A R K S BENCH MARK STAMPING: P 252 1965 10.40 DESIGNATION: P 252 MONUMENTATION: Bench Mark disk VM#: 19932 AGENCY: US Coast and Geodetic Survey (USC&GS) IDB PID#: SETTING CLASSIFICATION: Round concrete monument OPUS PID: LATITUDE: 27° 7.5' N ( 27.12506) LONGITUDE: 82° 26.8' W ( -82.44719) The bench mark is a disk set in the top of a round concrete monument recessed 0.2 m (0.6 ft) below the level of the ground and level with Colonia Lane, 9.8 m (32.3 ft) south of the approximate centerline of Colonia Lane, 8.1 m (26.6 ft) east of the approximate centerline of a bike trail median, 6.8 m (22.3 ft) west of a chain link fence, 6.7 m (22.1 ft) west-SW of a chain link fence corner post, and 0.4 m (1.3 ft) west of a metal witness post.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 5 of 6 Station ID: 8725902 PUBLICATION DATE: 05/25/2011 Name: SHAKETT CREEK FL NOAA Chart: 11424 Latitude: 27° 7.6' N ( 27.12670) USGS Quad: VENICE Longitude: 82° 26.8' W ( -82.44670) T I D A L D A T U M S Tidal datums at SHAKETT CREEK based on: LENGTH OF SERIES: 6 MONTHS TIME PERIOD: July 1977 - December 1977 TIDAL EPOCH: 1983-2001 CONTROL TIDE STATION: 8726520 ST. PETERSBURG, TAMPA BAY Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS: MEAN HIGHER HIGH WATER MHHW = 0.535 MEAN HIGH WATER MHW = 0.451 North American Vertical Datum NAVD88 = 0.396 MEAN SEA LEVEL MSL = 0.276 MEAN TIDE LEVEL MTL = 0.266 MEAN LOW WATER MLW = 0.080 MEAN LOWER LOW WATER MLLW = 0.000 North American Vertical Datum (NAVD88) Bench Mark Elevation Information In METERS above: Stamping or Designation MLLW MHW 5902 C 1977 1.839 1.388 5902 B 1977 1.697 1.246 5902 F 1977 1.402 0.951 W 699 2007 3.549 3.098 P 252 1965 10.40 3.211 2.760 Foot Notes: Geodetic heights of the bench marks meet all NOAA/NOS/NGS quality control standards for Second Order, Class 1 leveling. It is advised that a confirmation set of levels be established for bench marks P 252 1965 10.40 and W 699 2007 to verify height differences before using tidal bench mark elevation information.
U.S. DEPARTMENT OF COMMERCE National Oceanic and Atmospheric Administration National Ocean Service Page 6 of 6 Station ID: 8725902 PUBLICATION DATE: 05/25/2011 Name: SHAKETT CREEK FL NOAA Chart: 11424 Latitude: 27° 7.6' N ( 27.12670) USGS Quad: VENICE Longitude: 82° 26.8' W ( -82.44670) 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.