 A total of 3 @,@ 250 @,@ 000 cubic yards ( 2 @,@ 480 @,@ 000 m3 ) of concrete was used in the dam before concrete pouring ceased on May 29 , 1935 . In addition , 1 @,@ 110 @,@ 000 cu yd ( 850 @,@ 000 m3 ) were used in the power plant and other works . More than 582 miles ( 937 km ) of cooling pipes were placed within the concrete . Overall , there is enough concrete in the dam to pave a two @-@ lane highway from San Francisco to New York . Concrete cores were removed from the dam for testing in 1995 ; they showed that " Hoover Dam 's concrete has continued to slowly gain strength " and the dam is composed of a " durable concrete having a compressive strength exceeding the range typically found in normal mass concrete " . Hoover Dam concrete is not subject to alkali – silica reaction ( ASR ) as the Hoover Dam builders happened to use nonreactive aggregate , unlike that at downstream Parker Dam , where ASR has caused measurable deterioration . 
 A total of 3 @,@ 250 @,@ 000 cubic yards ( 2 @,@ 480 @,@ 000 m3 ) of concrete was used in the dam before concrete pouring ceased on May 29 , 1935 . In addition , 1 @,@ 110 @,@ 000 cu yd ( 850 @,@ 000 m3 ) <a href='uninflect' title='1'><mark>were</mark></a> used in the power plant and other works . More than 582 miles ( 937 km ) of cooling pipes <a href='uninflect' title='2'><mark>were</mark></a> placed within the concrete . Overall , <a href='dey_it' title='3'><mark>there</mark></a> is enough concrete in the dam to pave a two @-@ lane highway from San Francisco to New York . Concrete cores <a href='uninflect' title='4'><mark>were</mark></a> removed from the dam for testing in 1995 ; they showed that " Hoover Dam <a href='null_genetive' title='5'><mark>'s</mark></a>concrete <a href='been_done' title='6'><mark>has</mark></a> continued to slowly gain strength " and the dam is composed of a " durable concrete having a compressive strength exceeding the range typically found in normal mass concrete " . Hoover Dam concrete <a href='negative_concord' title='7'><mark>is</mark></a> <a href='negative_concord' title='8'><mark>not</mark></a>subject to alkali – silica reaction ( ASR ) as the Hoover Dam builders happened to use nonreactive aggregate , unlike that at downstream Parker Dam , where ASR <a href='been_done' title='9'><mark>has</mark></a> caused measurable deterioration . 
A total of 3 @,@ 250 @,@ 000 cubic yards ( 2 @,@ 480 @,@ 000 m3 ) of concrete was used in the dam b4 concrete pouring ceased on May 29 , 1935 . In addition , 1 @,@ 110 @,@ 000 cu yd ( 850 @,@ 000 m3 ) was used in the power plant and other works . More den 582 miles ( 937 km ) of cooling pipes was placed within the concrete . Overall , it is enough concrete in the dam to pave a 2 @-@ lane highway from San Francisco to New York . Concrete cores was removed from da dam for testing in 1995 ; they showed that " Hoover Dam  concrete done continued to slowly gain strength " and the dam is composed of a " durable concrete having a compressive strength exceeding the range typically found in normal mass concrete " . Hoover Dam concrete ain't subject to alkali – silica reaction ( ASR ) as the Hoover Dam builders happened to use nonreactive aggregate , unlike dat at downstream Parker Dam , where ASR done caused measurable deterioration .