48 U. S. COAST AND GEODETIC SUmTTT 



5, by a comparison of simultaneous tides consisting of 13 high waters 

 and 11 low waters observed during the period July 14 to July 22, 1926: 



Bench mark 1 (established in 1926) is a Coast and Geodetic Survey standard 

 disk, stamped ''1/1926," cemented in drill hole flush with the horizontal top 

 surface of the stone bridge pier at the southerly side of the railroad bridge lift 

 span. The mark is about 1 foot from the bridge span on its easterly side. Ele- 

 vation, 9.14 feet above sea-level datum; 14.01 feet above Boston low-water datum. 



Bench mark 2 (^established in 1926) is a Coast and Geodetic Survey standard 

 disk, stamped "2,1926," cemented in driU hole flush ^ith the horizontal top 

 surface in the next stone pier to the south of bench mark 1. Elevation, 9.06 

 feet above sea-level datum; 13.93 feet above Boston low-water datum. 



Bench mark 3 (.established in 1926) is a Coast and Geodetic Survey standard 

 disk, stamped '"3 1926," cemented in drill hole flush v^ith the horizontal top 

 surface of stone bridge pier on the southerly side of the railroad bridge, just north 

 of that in which bench mark 1 is located. Elevation, 8.49 feet above sea-level, 

 datum; 13.36 feet above Boston low-water datum. 



NUT ISLAND 



The following bench marks are referred to the Boston standard 

 datums through the primary tide station at Commonwealth Pier No. 

 5, by a comparison of simultaneous tides consisting of 89 high waters 

 and 88 low waters observed during the period June 9 to July 27, 1926: 



Bench mark 1 '.established by the city of Boston) is a stone monument on the 

 westerly side of Xut Island and reported to be easily found. Elevation, 24.55 

 feet above sea-level datum; 29. -42 feet above Boston low-water datum. 



Bench mark 2 (established in 1916) is a Coast and Geodetic Survey standard 

 disk set in northeast corner of granite foundation of sewer pumping station. 

 Elevation, 27.11 feet above sea-level datum; 31.98 feet above Boston low-water 

 datum. 



Bench mark 3 established in 1916) is a 1^2-inch brass bolt set vertically in 

 granite block of retaining wall just north of shore end of coal pier. Elevation, 

 18.88 feet above sea-level datum; 23.75 feet above Boston low-water datum. 



Bench mark 4 (.established in 1926) is a Coast and Geodetic Survey standard 

 disk, stamped "4, 1926," cemented in a drill hole in the concrete coping of a sewer 

 manhole about 40 yards northwest from the shore end of the pier. Elevation, 

 22.03 feet above sea-level datum; 26.90 feet above Boston low-water datum. 



Bench mark 5 (.estabhshed in 1926) is a Coast and Geodetic Survey standard 

 disk, stamped "5, 1926," cemented on top of a granite block on the upper sea wall 

 about 50 yards south from the boathouse. Elevation, 14.37 feet above sea-level 

 datum; 19.24 feet above Boston low-water datum. 

 • 



WEYMOUTH FORE RIVER BRIDGE 



The following bench marks are referred to the Boston standard 

 datums through the primary tide station at Commonwealth Pier 

 Xo. 5, by a comparison of simultaneous tides consisting of 14 high 

 waters and 14 low waters observed during the period June 17 ta 

 July 14, 1926: 



Bench mark 1 (established in 1926) is a Coast and Geodetic Survey standard 

 disk, stamped "1/1926," set flush with the concrete surface of the stair platform, 

 on its southeast corner south of brick building of Edison coaling plant. Eleva- 

 tion, 10.68 feet above sea-level datum; 15.55 feet above Boston low-water datum. 



Bench mark 2 (estabUshed in 1926) is a Coast and Geodetic Survey standard 

 disk, stamped "2/1926," set flush with the surface of the concrete wharf near 

 the southwest corner, just south of the concrete mooring bitt block. Elevation, 

 9.77 feet above sea-level datum; 14.64 feet above Boston low-water datum. 



Bench mark 3 (established in 1926) is a Coast and Geodetic Survey standard 

 disk, stamped "3/1926," set flush with the surface of the concrete-fence top 

 that makes out from the extreme easterly side of the wharf running normal to 

 the road. Elevation, 14.40 feet above sea-level datum; 19.27 feet above Bostoa 

 low-water datum. 



