Ronald Ballschmiede
Analyst · risk factors that could affect these projections and assumptions. The company assumes no obligation to update forward-looking statements as a result of new information, future events or otherwise.
Please also note that management may refer to EBITDA, adjusted EBITDA, adjusted net income or adjusted earnings per share on this call, which are all financial measures not recognized under U.S. GAAP. As required by SEC regulations and rules, these non-GAAP financial measures are reconciled to their most comparable GAAP financial measures in our earnings release issued yesterday afternoon. I will now turn the call over to Mr. Joe Cutillo. Thank you, sir. Please go ahead
I'm sorry, Slide 8. The graph presents our deleveraging expectations. Beginning with the October '19 Plateau acquisition and the new 5-year credit facility, our September 30, 2019, pro forma forward-looking EBITDA coverage ratio was approximately 3.5%. Based upon our continued progress in executing the strategic actions to improve our base business results and our confidence in the quality of Plateau's future cash flows, we were comfortable with the higher acquisition-related day 1 leverage ratio.
We set the objective to bring the coverage ratio down to 2.5x by the end of 2021. The graph reflects where we are to date and our targets through the end of 2021. Importantly, only the scheduled funded debt payments are included in the leverage computation for the future periods presented.
During the third quarter, we repaid the $20 million of revolver borrowings, which were outstanding at June 30, 2020. At the end of the third quarter of 2020, we had 0 revolver borrowings and have full availability of our $75 million revolver.
Our confidence in our de-leveraging strategy has been reinforced by the experience of the first 4 quarters of Plateau results, together with Sterling's base business performance and our consolidated expectations. Examples supporting our confidence includes record backlog levels with increasing gross margin.
Secondly, our first 9 months of 2020 performance exceeded our initial expectations, supporting the midyear increase in our 2020 revenue and net income guidance even with the challenges of managing through the continuing COVID-19 issues.
Next, our adjusted EBITDA for the first 9 months of 2020 totaled $99.2 million, a $57 million improvement over the 2019 comparable period. We continue to believe that our full year 2020 adjusted EBITDA will be in the $125 million to $135 million range.
In addition, our cash flow from operating activities for the first 3 months of 2020 totaled $90.9 million, a 10-fold improvement over the $8.5 million of cash flow from operations in the comparable 2019 period.
For the full year 2020, in addition to depreciation and amortization, we expect additional noncash expenses totaling $24 million to $28 million. These noncash expenses include the utilization of our NOL, stock-based compensation and noncash interest expense.
Finally, moving to our balance sheet. Our September 30, 2020, cash and cash equivalent balance totaled $72.6 million compared to $45.7 million at the beginning of 2020. This cash increase reflects investing $20.5 million on net capital expenditures during the year-to-date 2020 period.
Finally, please note that the third quarter 2020 investor deck posted to our website includes an appendix to assist our stakeholders with modeling considerations, understanding the key components of our cash flows and various non-GAAP disclosures. Now I will turn the call back over to Joe. Joe?