Awk,sed,shell copy ID in new lines

Shell Programming and Scripting
1

Hi all

i want table file in pattern like under

ID(digits and underline) phonetic begin_byte(only plus number) end_byte(only plus number)

but
ID loose in next lines of my file
my input file like this:

input
001_1_174 [g/n 474536 482492
mo[g/n 482492 504062
'er/  504062 517352
ruze 517352 529562
001_1_175 uz[`f 960192 966656
.ire 966656 984416
tuf/[ 984416 1006166

i want copy ID in new line. copy ID of first column in next new line until next new ID.
something like this

001_1_174 [g/n 474536 482492
001_1_174 mo[g/n 482492 504062
001_1_174 'er/ 504062 517352
001_1_174 ruze 517352 529562
001_1_175 uz[`f 960192 966656
001_1_175 .ire 966656 984416
001_1_175 tuf/[ 984416 1006166
2

Rules and requirements as explained by Don Cragun didn't change ever since he closed your other thread.