We report the discovery of two damped Ly \alpha absorption-line systems ( DLAs ) near redshift z = 1 along a single quasar sightline ( Q1727+5302 ) with neutral hydrogen column densities of N _ { HI } = ( 1.45 \pm 0.15 ) \times 10 ^ { 21 } and ( 2.60 \pm 0.20 ) \times 10 ^ { 21 } 
atoms cm ^ { -2 } .
Their sightline velocity difference of 13,000 km s ^ { -1 } corresponds to a proper separation of 106 h _ { 70 } ^ { -1 } Mpc if interpreted as the Hubble flow ( \Omega _ { m } = 0.3 , \Omega _ { \Lambda } = 0.7 ) .
The random probability of such an occurrence is significantly less than 3 % .
Follow-up spectroscopy reveals neutral gas-phase Zn abundances of [ Zn/H ] = -0.58 \pm 0.15 
( 26.5 % solar ) and -1.32 \pm 0.28 ( 4.7 % solar ) , respectively .
The corresponding Cr abundances are [ Cr/H ] = -1.26 \pm 0.15 ( 5.5 % solar ) and -1.77 \pm 0.28 ( 1.7 % solar ) , respectively , which is evidence for depletion onto grains .
Follow-up IR images show the two most likely DLA galaxy candidates to have impact parameters of \approx 22 h _ { 70 } ^ { -1 } 
kpc and \approx 32 h _ { 70 } ^ { -1 } kpc if near z = 1 .
They are significantly underluminous relative to the galaxy population at z = 1 .
To investigate the possibility of additional high- N _ { HI } 
absorbers we have searched the SDSS database for z > 1 
quasars within 30 arcmin of the original sightline .
Five were found , and two show strong Mg ii-Fe ii absorption near z = 1 , consistent with classical DLA absorption \approx 37 % of the time , but almost always N _ { HI } > 10 ^ { 19 } atoms cm ^ { -2 } .
Consequently , this rare configuration of four high- N _ { HI } absorbers with a total sightline velocity extent of 30,600 km s ^ { -1 } may represent a large filament-like structure stretching over a proper distance of 241 h _ { 70 } ^ { -1 } Mpc along our sightline , and a region in space capable of harboring excessive amounts of neutral gas .
Future studies of this region of the sky are encouraged .