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\textit{Top}: Position-velocity diagram of CO and NH$_{3}$ emission for BC\_335.31-0.29. Blue background shows $^{12}$CO (1-0) emission integrated between $-1 < \textrm{b} < 1$ degrees \citep{Dame_2001}. Black dots show HOPS sources associated with BC\_335.31-0.29. The black Colored  lines are fits toCO data for the Scutum-Centaurus arm, from \citet{Dame_2011}. \textit{Bottom}: Plane of the sky map integrated between -50-30 km/s, the approximate velocity range of  the Scutum-Centaurus arm in the region around BC\_335.31-0.29. A trace of BC\_335.31-0.29, as it would appear as a mid-IR extinction feature, is superimposed on the CO emission map. The correlation between BC\_335.31-0.29's mid-IR extinction feature and the Scutum-Centaurus's arm more intense CO emission hints that BC\_335.31-0.29 may be a spine of Scutum as traced by lower density CO gas (see text for references).