the fourth quarter. Of that total, the company gathered over 23,300 barrels per day on pipe (up 102% from fourth quarter 2019). With 57% of managed water on Blue Mountain’s pipe, Blue Mountain exceeded its guidance range. Furthermore, Blue Mountain completed construction of its third wholly owned and operated salt water disposal well.
Blue Mountain began construction of its crude oil gathering system in October 2019. The initial segments on the South system were placed in service on February 1,2020 and the initial segments on the North system were placed in service on March 2, 2020.
Starting in April, due to consistently low commodity prices, certain producers have elected to curtail production. As a result, Blue Mountain expects to see lower second quarter throughput at its gas processing plant versus the prior quarter. At the end of April, natural gas throughput was approximately 80 mmcf/d. Given the dynamic environment, the Company has chosen not to provide second quarter guidance for Blue Mountain.
Finally, I would like to take a moment to thank all our employees for their tremendous efforts over the last couple of months as we have found productive ways to implement social distancing including in many cases working remotely. In the face of all the distractions and challenges we have confronted during the quarter we continue to find ways to meet or exceed expectations. So, Thank you!
With that, I will turn the call over to Jim to discuss the financials in more detail.
Jim Frew
Thanks, Dave. Before opening the call up for Q&A, I’d like to discuss the following items: 1) first quarter performance, 2) balance sheet and liquidity, 3) return of capital to shareholders, and 4) 2020 upstream guidance.
First Quarter Performance
We had another solid quarter with production averaging 72 MMcfe/d. This was above the midpoint of our guidance range. Operating costs came in at the lower range of our guidance, driven by much lower lease operating expenses partially offset by higher transportation costs. For the quarter, adjusted EBITDAX came in above guidance while capital expenditures werein-line with guidance.
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