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| NAVD 88 DOES NOT CONTAIN USGS, COE, OR
STATE DOT |
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| THIRD-ORDER LEVELING DATA. |
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| USGS PERSONNEL HAVE PERFORMED PILOT STUDIES TO |
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| DETERMINE HOW TO BEST INCORPORATE THEIR THIRD- |
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| ORDER DATA INTO NAVD 88 (ABOUT A 5-10 YEAR |
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| PROGRAM) |
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