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What is Water Height? LUMCON water height measurements are displayed on our website relative to NAVD88 Mean Sea Level. This relationship to Mean Sea Level is calculated using the following method. A mark on the station platform is surveyed relative to the closest practical survey benchmarks. The location of the YSI Sonde pressure sensor, relative to the station mark, is accurately measured. The YSI Sonde pressure sensor is carefully maintained at the same vertical distance from that station mark. Below is a description of the most recent station measurements. LUMCON Marine Center Station: A survey was conducted on July 12, 2003 to determine the vertical elevation of a reference point near the Pump House located behind the DeFelice Marine Center. To review the full version of this survey in PDF format Click Here. The survey was conducted by: Morris P. Hebert Inc. Surveying - Engineering - Environmental Services 283 Corporate Drive PO Box 3106 Houma, LA. 70361 The following correction factors should be applied:   Feet Meters   NAVD 88 Correction Term (Subtract from Database Sonde Value) 4.10 1.25   EXAMPLE: Given a water height reading from the sonde of 5.25 feet (1.6 meters) the following calculation can be made: Water Height = Sonde Water Height - NAVD 88 Correction Term 1.6 meters (5.25ft) - 1.25 meters (4.1 ft) = 0.35 meters (1.15 ft) RESULT: 0.35 meters (1.15 ft) Relative to NAVD 88 Datum Note:All archive depth data is reported in meters. Return to LUMCON Home © Louisiana Universities Marine Consortium