These two benchmarks refer to different lights on the same tower. The top light is designated BH3138 Mobile Point Light.
The light in the upper third of the tower is BH3140 Mobile Bay Rear Range Light.
The data sheet for BH3140 Mobile Point Rear Range Light: (
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"BH3140 DESIGNATION - MOBILE POINT REAR RANGE LIGHT
BH3140 PID - BH3140
BH3140 STATE/COUNTY- AL/BALDWIN
BH3140 USGS QUAD - FORT MORGAN (1982)
BH3140
BH3140 *CURRENT SURVEY CONTROL
BH3140 ___________________________________________________________________
BH3140* NAD 83(1992)- 30 13 41.48659(N) 088 01 26.53072(W ADJUSTED
BH3140* NAVD 88 - 26. (meters 85. (feet) VERTCON
BH3140 ___________________________________________________________________
BH3140
BH3140_MARKER: 14 = NAVIGATION LIGHT
BH3140
BH3140 HISTORY - Date Condition Recov. By
BH3140 HISTORY - 1982 FIRST OBSERVED NOS
BH3140
BH3140 STATION DESCRIPTION
BH3140
BH3140''DESCRIBED BY NATIONAL OCEAN SERVICE 1982 (RKM)
BH3140''STATION IS LOCATED NEAR FORT MORGAN.
BH3140''
BH3140''TO REACH THE STATION HEAD W ON HWY 180 FROM INTERSECTION OF
BH3140''HWY 59 AND HWY 180 IN GULF SHORES FOR 35 KMS (22 MI) TO
BH3140''FORT MORGAN. DRIVE AROUND TO THE BACK OF FORT MORGAN TO THE
BH3140''AREA OF COAST GUARD LIGHT STATION. THE TOWER AND STATION ARE
BH3140''JUST N OF THE COAST GUARD STATION. THE LIGHT IS ABOUT HALF
BH3140''WAY UP THE MOBILE POINT LIGHT TOWER. THE STATION IS 184 M N
BH3140''OF STATION WHITING 82 AND 738 M FROM THE FRONT RANGE LIGHT. THE
BH3140''STATION IS JUST ABOVE THE ORANGE AND WHITE DAYBEACON ATTACHED
BH3140''TO THE REAR RANGE TOWER.
BH3140''
BH3140''STATION IS A NAVIGATIONAL LIGHT WHICH IS RED ATTACHED TO A
BH3140''LARGE METAL TOWER WHICH IS USED AS THE REAR RANGE FOR ENTERING
BH3140''MOBILE CHANNEL."