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We report spectroscopic redshift measurements for three bright submillimetergalaxies (SMGs) near the GOODS-N field, each with SCUBA-2 850 micron fluxes >10 mJy, using the Northern Extended Millimeter Array (NOEMA). Our molecularlinescan observations of these sources, which occupy a ~7 arcmin$^2$ areaoutside of the HST coverage of the field, reveal that two lie at $z \sim$ 3.14.In the remaining object, we detect line emission consistent with CO(7-6), [CI], and H2O at $z$ = 4.42. The far-infrared spectral energy distributions ofthese galaxies, constrained by SCUBA-2, NOEMA, and Herschel/SPIRE, indicateinstantaneous SFRs $\sim4000 ~{\rm M_{\odot}~yr^{-1}}$ in the $z$ = 4.42 galaxyand $\sim 2500~{\rm M_{\odot}~yr^{-1}}$ in the two $z \sim$ 3.14 galaxies.Based on our sources' CO line luminosities, we estimate $M_{{\rmgas}}\sim10^{11} M_{\odot}$ and find gas depletion timescales of $\tau_{{\rmdepl}}\sim 50$ Myr, consistent with findings in other high-redshift SMGs.Finally, we show that the two $z \sim$ 3.14 sources, which alone occupy avolume $\sim$10 Mpc$^3$, very likely mark the location of a protocluster ofbright SMGs and less dusty optical sources.

NOEMA Redshift Measurements of Extremely Bright Submillimeter Galaxies Near the GOODS-N