The Galactic CO survey of Dame , Hartmann , & Thaddeus ( 2001 ; hereafter DHT ) is composed of both large-scale unbiased surveys , mainly concentrated within 10 ^ { \circ } of the Galactic plane , and targeted observations of clouds at higher latitudes .
Analysis of all-sky IRAS and 21 cm maps suggests that the DHT survey is nearly complete for clouds larger than \sim 1 ^ { \circ } , even though roughly half of the total area at |b| < 30 ^ { \circ } was not observed .
In October 2001 we began a new survey of all of this unobserved area that is accessible to the northern 1.2 meter telescope , approximately 6,600 deg ^ { 2 } between l = 0 ^ { \circ } and 230 ^ { \circ } , mainly in the latitude range |b| = 10 ^ { \circ } –30 ^ { \circ } .
At least 12 hours per day is being dedicated to this large project , which is sampled every { } ^ { 1 } / _ { 4 } ^ { \circ } ( every other beamwidth ) to an rms sensitivity of 0.19 K at a velocity resolution of 0.65 km s ^ { -1 } .
As of May 2003 , we have obtained 90,000 of the 106,000 spectra required to complete the survey .
While , as expected , the new observations do not substantially change the DHT map , 68 relatively small and isolated molecular clouds at intermediate latitudes have so far been discovered .

The survey has also been extended to b < -30 ^ { \circ } in two regions , one in the vicinity of the large MBM clouds 53-55 at l \sim 90 ^ { \circ } and the other south of the Taurus clouds at l \sim 170 ^ { \circ } .
Substantial amounts of molecular gas were detected in both of these high-latitude regions .