Table 4 (Continued) 
Date(s) Construction and Rehabilitation History 
1929 For the purpose of flood control, the Brazos River was diverted to a 
point 5 miles south of the jetties. Due to the predominant southerly 
direction of littoral drift, the river ceased to be the major source 
of sediment supply to the jetties. Subsequent evolution of the 
shoreline showed a recession on both sides of the jetties, particu- 
larly on the south shore, where prior to the diversion the shoreline 
had advanced to within a few hundred feet of the jetty's seaward end. 
1933 The jetties were repaired using 20,670 tons of mostly cover stone and 
resetting 1,740 cover stone at a total cost of $96,000. 
1935 | A concrete cap was placed on the north jetty from 9+00 to 25+00 using 
1,653 cu yd of concrete. The cap was 6 ft wide with a top elevation 
of +7 ft mlt. 
1936 The south jetty was capped from sta 0+00 to sta 45+80 using 6,085 cu 
yd of concrete. Top elevation of the cap was +8 ft mlt with widths 
of 2 and 8 ft landward and seaward of sta 15+90, respectively. The 
2-ft-wide cap had 4V:1H side slopes, and the 8-ft-wide cap was 
rectangular. Total cost was $92,300. 
1941 The north jetty was capped with 2,754 cu yd of concrete over a dis- 
tance of 2,500 lin ft. The jetty now was capped from sta 0+00 to at 
least sta 42+50 with top elevations of +4 and +8 ft mlt landward and 
seaward of sta 8+30, and widths of 6 and 8 ft landward and seaward of 
26+30, respectively. Total cost was $47,300. 
1964 An inspection of the jetties indicated that although the concrete 
caps were in good condition, adjacent and underlying stone had con- 
solidated or shifted leaving void spaces beneath the caps. The south 
jetty was in more immediate need of repair, mostly in the general 
vicinity of the south gulf shoreline between sta 0+00 and sta 30+00. 
These repairs were needed to prevent continued scour and undermining 
along this section. Based on available funds, limited rehabilitation 
of the jetties was considered but was rejected due to potential 
project improvements which included moving and rebuilding the north 
jetty and channel deepening. 
1968 Two sections of the south jetty, from sta 11+00 to sta 11+75 and 
sta 17+70 to sta 19+30, were repaired by buttressing the concrete cap 
with stone and placing concrete between sta 18+00 and sta 19+05 
(Figure 5). The landward section was subjected to undermining and 
piping beneath the cap. The cap on the outer section had collapsed, 
due to undermining, with about 20 ft at +1 ft mlt and the remainder 
between +1 and +8 ft mlt. The concrete was placed to the original 
dimensions of +8 ft mlt and an 8-ft width. Stone was placed on the 
gulf side of the cap to +8 ft mlt, a 6-ft top width and 1V:2.5H side 
(Continued) 
24 
