Our customer confidence and request for our services continues at a high demand and we are well positioned to generate long-term value for our shareholders. Our most recent report from our contact management system shows our addressable opportunities continuing to grow quarter-over-quarter.

We are pleased to finish the year with solid results across our operating segments. We achieved our goal of nearly $3 billion in revenue by 2019 with contributions from both our legacy business units and our acquired companies.

Of particular note is the 70% growth in our MSA revenue and MSA backlog of $1.3 billion, or nearly half of our total backlog. This is a result of a clear goal we set for ourselves back in 2017, as we believe a strong MSA backlog provides a solid counter balance to the sometimes cyclical nature of the E&C business.

Primoris ended the year with a strong balance sheet, having already paid down nearly a-quarter of the debt associated with the Willbros acquisition. I'm also pleased to report, we are well along our path as a successional integration of that acquisition and it is within the guidelines we set for ourselves and reported to our shareholders when we made the acquisition. We were also notified this week that Primoris has been named as one of the finalists by D CEO's 2019 Mergers & Acquisition Awards as recognition for acquisition excellence.

Our outstanding fourth quarter cash balance allowed us to end the year with a strong cash balance and a reduction in our debt-to-equity ratio and we're gratified by our success in continuing to reduce our overall overhead expense in 2018.

We achieved all of this, while maintaining a safety TRIR record of 0.51, below our internal goal and well below the construction industry average. Our employees are dedicated to building the best company in the services industry and are committed to delivering safe, quality, reliable and industry best-in-class performance. This dedication helps us deliver profitable, predictable and financial performance.

Driving down to our operating segments. I'll start with our Power, Industrial & Engineering segment, where we now have over 2,000 employees working hard every day. During the fourth quarter, Tim Healy's ARB Industrial team wrapped up the successful Carlsbad power project. The plant was fully commissioned and achieved power to the grid flawlessly. Our client recognized the ARB team and later awarded them the 2018 safety award for the year for that company.

We also saw increased revenue with a large refining customer in California, as California's SB 54 is driving this work toward the union contractors. Refining work, power jobs like the recently announced power plant with a battery storage component and our oilfield maintenance MSAs will help our team stay busy in 2019, while we continue to pursue the larger projects where timing is more uncertain.

Our ARB Industrial Group's project opportunities continue to grow as we're bidding on work for long-term maintenance agreements, power projects, both renewable and carbon-based and compressor and terminal operations.

Our Primoris Renewable Energy team achieved substantial completion of the largest solar installation to date in Texas. Although, that project will not hold that title for pretty long, as we have just recently announced the new Texas solar project that is more than double in size. It's a great win for Primoris Renewable Energy and a reflection of the quality performance they deliver on 2018's solar project.

Our two engineering groups have been staying busy also. Randy Kessler and the OnQuest team are working on the modularization of the PDH heaters in Canada, while also completing the engineering design of our most recent 260,000 gallon per day peak shaving LNG facility in the New England area.

Their prospects look ever promising in the peak shaver LNG market, as we're seeing more demand for these size units, a market where we have an extensive resume. The LNG cycle, both for these size units and the larger facilities, is definitely here and continuing to be released.

Kevin Maloney and the Primoris Design & Construction team have been actively teaming up with other Primoris business units to develop work, such as the $20 million refining award for our I&M group we announced in this quarter.

Our PDC team is actively working on FEED development and design projects for green diesel projects, isomerization units, alkylation units and refining upgrades to process the lighter crude slates. The refining and petrochem markets we serve through this group are definitely continuing to emerge and through this business unit, we not only get the engineering design, but also the ability to supply the fabrication and construction through Primoris' other business units.

Primoris Canada had a big win, with the award of the engineering, procurement and construction of three new storage tanks in the Canadian oil sands. While under previous management, this business unit had struggled to achieve consistent performance.

We commend Jeremy Kinch after joining Primoris' via the acquisition, for taking steps to cut overhead and right-size the business. While their normal prospect list of the MSA maintenance work in the oil sands facility continues, we are seeing other opportunities for their services as noted by this recently announced win.

Primoris industrial contractors is also actively partnering with sister companies to pursue new work such as the award to our renewables teams for the new solar project and our PD&C group for the refining sector. Recent announcements by customers to move forward with major petrochemical, LNG expansions and greenfield projects have set the stage for Kevin Smith's team to have a strong year, though timing of the new awards for them will likely mean their year will be back-end loaded.

Moving on to our Civil segment. Those new projects should also lead to increased work for Jonas Beatty and that Primoris I&M team. Right now they are staying busy with MSA work for major chemical customers and cross selling their abilities with business units in the Power Industrial & Engineering segment.

As customers have made steps to proceed with the new projects they've announced valued at billions of dollars, the first step for those facilities will be site, prep and earth work which is where Primoris' I&M team shines. We are seeing demand for their services in LNG projects, some recently sanctioned refining projects, PBC and MDI plants.

Our Primoris Heavy Civil team had a steady fourth quarter and Mark Buchanan's team did a great job of navigating an exceptionally wet October. We continue to have a controlled attitude toward growth for this business units as we wrap up the legacy Belton area jobs this year.

TxDOT has multiple $100 million plus projects out for bid this year and we are taking a disciplined approach to the growing market. With the funding now being released in Louisiana, we have redirected some of the efforts to our design build projects for Louisiana Department of Transportation and expect to be making some favorable project award announcements, an area where we have extensive experience and very favorable past financial performance.

Our Transmission and Distribution segment led by Jeff Prim now employs over 2,300 workers. We have opened training centers in North Carolina and Texas and we are working along alongside our clients in their local community college and training facilities to help provide the qualified alignment needed to grow this business.

As we approach its one year anniversary in this second quarter, this acquisition is on track to deliver the results we expected, a growth in MSA revenue, geographic expansion across the Southwest and East Coast and relationships with new utility customers.

Our plan for 2019 is to continue expanding our training facilities, continue our move toward more owned rather than leased equipment and negotiate favorable renewables as legacy MSA agreements renew. The MSA business, our backlog for this segment was a large contributor to our record year-end MSA backlog. As we have previously announced some awards more are under way as we continue to see great growth opportunities in this market and the demand for our services. The client base has been and continues to be very supportive of our entry into this market.

The largest component of our MSA backlog comes from our Utilities & Distribution segment. Starting this year we will move the results of Willbros' gas distribution unit out of the T&D segment and into the U&D segment where it more properly belongs. Mike Christy oversees this segment's 3,000-plus employees with work for Utility customers ranging from the East Coast to the West Coast and everywhere in between.

In California, Scott Summers and the ARB Underground team responded to disaster areas caused by wildfires with teams working around the clock in challenging -- as we stated in our press release earlier this quarter, we stand behind our customers as they go through their bankruptcy process. This is a process we've lived through before with them so we know what we're doing. We have already began receiving payments from them for post petition work and all of our pre-petition work has had the proper protections placed and falls within two of the three critical categories authorized for payment by the proceedings.

We feel confident we will receive all of our payments and we will be patient with our clients as they work through their issues. While the wildfires have been devastating for the residents of California, they are providing opportunities for us to help utilities with fire hardening programs and we expect this to drive demand over the next several years.

Doug Reeves led Q3C to another successful quarter, but the Arctic freeze throughout the Northwest -- in the Midwest, pardon me, last month is sure to intensify the usual seasonal first quarter slowdown as we start off in 2019. After they thaw out we expect Q3C to have another profitable and record year.

Our open shop utility unit, Primoris Distribution Services continues to perform well and combined with the Willbros Gas Distribution unit, we are expanding our ability to serve customers across the Southwest and up to East Coast. Our strategic plan calls for this unit to not only grow through the Southeast, but also the Midwest and Southwest and Jason Osborn will be working alongside Mike Christy to make that a reality.

Our final operating segment is the Pipeline & Underground segment. I'll start by discussing the Atlantic Coast pipeline project as that project has dominated much of the headlines over the last past several months. On February the 1, our client announced that they were halting construction on the project until the fall of 2019. At the same time they also increased the total cost of the project by another $500 million. So it now stands at an estimated $7 billion to $7.5 billion.

This pushes out revenue on this project to the fourth quarter of this year and into 2020 and beyond, but our client was resolute in their commitment to the project and we still believe the pipeline will be completed, albeit not on its original time line. There is not much more I can add other than what has been released by our client in their own press releases.

Our guidance for the year has a limited contribution from ACP. While the time line has been frustrating, Josh Ramsey now has clarity regarding Rockford's crews and availability and he is actively pursuing and securing new work for 2019. There are several projects we believe will help bridge the gap until the remobilization of ACP. We are very close to making a new project enhancement that will keep Josh's team working and will barn revenue quickly albeit not at the same level as the ACP project.

Our open shop pipeline group, Primoris pipeline made significant progress on their two spreads of 24-inch natural gas liquids pipeline in the West Texas Permian Basin despite the project being under heavy rains for much of October. Patrick McRae's team should wrap up this project in the second quarter and the bid list of work for the remainder of 2019 for him looks as strong as it's been years.

While both Rockford and Primoris pipeline had a strong funnel of opportunity, it's safe to assume that 2019 results will be weighted toward the second half of the year for both of them. Jeff Bridges and the Primoris Field Services group continue their strong execution on the 30-inch and 36 import and export gas pipelines projects. And while 2018 was a very back-end loaded year for them, we expect 2019 to be spread more evenly throughout the year.

And at the corporate level, we expect to continue our path of driving down overhead costs reducing corporate debt and being diligent on our receivables and cash collections. We believe our conservative approach to growth offers our shareholders the best opportunity for a meaningful long-term appreciation as we look to our MSA backlog to provide a stable, recurring revenue base while opportunities in the petrochemical, renewable and refining markets provide potential upside.

We are still looking at numerous acquisition targets and as always we keep our eye open for a good fit at the good price which adds value for our shareholders. I'll now turn it over to Ken for his comments about our numbers.

Kenneth M. Dodgen -- Executive Vice President & Chief Financial Officer

Thank you David and good morning everyone. I'll focus on our fourth quarter results, our balance sheet and cash flows and our 2019 guidance before we move on to your questions. Our 2018 fourth quarter revenue was $878 million compared to $579 million in the fourth quarter of 2017, an increase of 51%. Four of our five segments contributed to the increase including our newly formed Transmission & Distribution segment which added $123 million of revenues for the quarter.

And our pipeline segment which benefited from work on the Atlantic Coast Pipeline and two pipeline jobs in West Texas. Our largest customers in the fourth quarter was three large utility customers that collectively accounted for 21% of the revenue and a pipeline operated that accounted for 11.8% of our fourth quarter revenue.

Our gross profit for the fourth quarter was $103 million, compared to $68 million in the prior year, an improvement of $35 million or 51%, which was directly attributable to our revenue growth in the quarter.

Fourth quarter gross margins were 11.8%, which is consistent with our gross margins in the fourth quarter of 2017. We were able to maintain these gross margins as a result of strong performance from both our power and utility segments.

We've previously discussed our attempts to resolve our outstanding receivables from a project that we completed in 2014. We have been successful collecting the money owed to us from several sureties through the first three quarters of this year. And during the fourth quarter we reached a settlement with the last surety.

As a result of this settlement, we recognized approximately $12 million in revenue and $11 million of gross profit during the quarter. It is nice to finally have this settled and behind us.

While SG&A expenses increased from $44 million in the fourth quarter of 2017 to $50 million in 2018 as a percentage of revenue our SG&A declined noticeably from 7.5% in the prior year to only 5.7% in 2018. It's also worth noting that for the entire year our SG&A expenses were 6.2% of revenue, down from 7.2% in 2017. This decrease is in line with our goals and is a direct result of our efforts to reduce overhead expenses as well as our ability to control costs as we grow our revenue.

Interest expense increased in the fourth quarter of 2018 due to higher debt from the acquisition of Willbros and a non-cash $2.8 million unrealized loss on the change in the fair value of our interest rate swap that we entered into, into the third quarter. The provision for income taxes in the fourth quarter was $11 million for an effective tax rate of -- on income attributable to Primoris of 25.6%.

Our full year effective tax rate on income attributable to Primoris was 25%. And in 2019 we expect that rate to be closer to 28% as investment tax credits related to our solar and other investments roll off in early 2019.

Net income attributable to Primoris in fourth quarter 2018 was $32.4 million, a 44% increase over fourth quarter 2017 and our earnings per share at $0.63 match the record EPS we reported in the prior quarter.

For the full year, we earned $1.50 per share compared to $1.40 per share in 2017. When we announced the completion of the Willbros acquisition on June 1 2018 we expected to realize approximately $25 million of EBITDA from the acquisition during the first 12 months of ownership.

Our integration efforts are on schedule and our growth initiatives are starting to bear fruit. After seven months the Willbros acquisition is on pace to achieve and possibly exceed our 12-month goal.

Turning to the balance sheet and cash flows. In the third quarter earnings call we mentioned that we had some very big collection days coming in the fourth quarter. I'm pleased to report that our cash flow from operating activities was almost $140 million in the fourth quarter 2018, compared to only $27 million in the fourth quarter of 2017. This improvement was the direct result of our operating segments and our focused efforts to invoice our customers timely and collect our receivables. As a result, excluding cash from joint ventures we ended the quarter with almost $148 million in cash, which was $100 million increase from the previous quarter.

In the fourth quarter of 2018 we invested approximately $29 million in capital expenditures. And consistent with prior quarters this is primarily spent on equipment and operating facilities to help control our operating costs and support our future organic growth initiatives.

In 2019, we will continue to invest prudently in equipment and facilities and we anticipate our capital expenditures will be between $85 million and $90 million. We also continue to reduce our debt from the peak level we experienced at the end of the second quarter 2018 after we completed the Willbros acquisition.

At the end of the second quarter our total debt was $420 million and our debt-to-equity was 74%. As of the end of the year we had reduced our debt by $52 million to $368 million, reduced our debt-to-equity ratio down to 61% and our weighted average interest rate was a little under 4.1% for the year.

Total backlog at the end of 2018 was $2.8 billion, $1.5 billion of that or 53% is fixed backlog and $1.3 billion or 47% is MSA backlog, as David said the highest our MSA backlog has ever been. During 2019 we expect that over $2.3 billion of our year-end backlog will be turned into revenue.

And finally our guidance for fiscal year 2019. Our range is $1.60 to $1.80 per fully diluted share and is based on our expectations that we'll be working again on the Atlantic Coast pipeline but not starting until late in the third quarter. Based on public statements made by the owner, we believe that is reasonable; however there are still many permitting issues that need to be resolved. And we are anticipating a tax rate of 28% on income attributable to Primoris.

With that we can now turn to your questions. Operator?

Questions and Answers:

Operator

At this time, we'll be conducting a question-and-answer session. (Operator Instructions) Our first question comes from Lee Jagoda, CJS Securities. Please proceed with your question.

Lee Jagoda -- CJS Securities -- Analyst

Hi, good morning.

David L. King -- President & Chief Executive Officer

Good morning, Lee.

Lee Jagoda -- CJS Securities -- Analyst

So just starting with the Utilities segment I think you called out weather and mix in terms of the issues that caused margins to be a little bit lower. Is there a way to parse out the weather versus the mix? And then on the mix side just go through some of the issues you had? And how sustainable that might be into 2019?

David L. King -- President & Chief Executive Officer

Yes, I don't think we can parse it out Lee. Like you're asking with real numbers on things like that. Let me mention the weather was obviously, the arctic weather that hit Q3C and then we had the weather and things in California that caused a lot of issues both at the ARB Underground and obviously the cold weather up in Minnesota area. Some of the mix as there's two things on the mix that I'll mention. One is as we go into a new geographic area, we obviously expand into that area. There will be more cost associated with that job as we expand and set up those offices and set up those crews and things and of course that goes against the cost of the job. So part of that is the mix of going into an area that's new to us as we expand versus already into an established area. And then some of it as we get into some of those new areas we'll take on jobs sometimes to break into those areas that maybe is a little bit different of the mix than what we typically work on until we get well established.

Lee Jagoda -- CJS Securities -- Analyst

Got it. Very helpful. And then just looking at the transmission business, can you talk about some of the actions that you're taking to ultimately get those margins closer to the Utilities segment margins? And are some of the actions that you're taking actually impacting the short-term margin results there?

David L. King -- President & Chief Executive Officer

Yes, yes all around. Let me get -- we mentioned this when we first looked at that and I'll come back and give you some more specifics r some additional specifics although we talked in generalities before on them. One was obviously getting their facilities consolidated, closing down some of their facilities looking at some of their shared services and consolidating them in some locations. They were very fragmented before relative to how that business unit was being operated. So part of it is just the normal savings as we go along in consolidation and those you don't see immediately. I think when we actually did the acquisition, we mentioned that those would be coming over a period of time.

Another thing was that we mentioned on the equipment going from a pure leased basis of equipment to ownership of some of that equipment. And then also as we're looking at some of the ownership and buying some of the equipment investing the CapEx, it's the type of equipment that we're buying. They were using a little bit through the rental agencies from what we considered some antiquated equipment is relative from the productivity standpoint. Bucket trucks and extension trucks and a lot of things like that, so as we upgraded the fleet that helps us get the productivity up.

Still have the same work force, still have the -- maybe the same workforce cost per hour, but we are able to with new equipment and equipment given a little bit more productive. And then another component of it is as we renew some of the MSA agreements and I mentioned that earlier as they come up for renewal, some of those they -- and it was unfortunate that Willbros did it, but it happened. Some of them they took some Ts and Cs that probably they shouldn't have and the clients took a little bit of an advantage of them and that happens when you're in that situation.

And so we've been very open with our client base. And I think I mentioned it in my comments, our clients have been very receptive to us being in this market certainly understand. So as we renew some of those contracts, we'll get a little bit better T&C. So we'll work a little bit on the top side of the profitability equation and then a little bit on the underside from the pure cost side.

Lee Jagoda -- CJS Securities -- Analyst

Great. Its very helpful. I'll hop back in queue. Thank you.

Operator

Our next question comes from Tahira Afzal, KeyBanc. Please proceed with your question.

Tahira Afzal -- KeyBanc -- Analyst

Hi, folks. How are you doing?

David L. King -- President & Chief Executive Officer

Good, Tahira.

Kenneth M. Dodgen -- Executive Vice President & Chief Financial Officer

Good morning, Tahira.

Tahira Afzal -- KeyBanc -- Analyst

So I guess the question that you may not be able to answer, but ACP what are you embedding in your guidance approximately? And I know there are a lot of uncertainties David to the extent you mentioned and how the project rolls out. But as it stands right now statically, does it fill you up fairly notably into next year?

David L. King -- President & Chief Executive Officer

Are you talking about once it restarts, Tahira?

Tahira Afzal -- KeyBanc -- Analyst

Yes, exactly, David.

David L. King -- President & Chief Executive Officer

It will -- it won't fill us up. As we told you, we had always kept one spread capability back, OK. So it won't fill us up once it starts with Rockford all the way. And since it's only Rockford on that not our open shop pipeline. Obviously, that open shop pipeline still there's the capacity in things. Maybe on your -- the first part of your question Tahira. They told us in their own announcements and things late first -- the late third quarter, when you begin to look at if it happens in late third quarter, the reason we haven't put a lot in is because you're really not going to be able to do much up in the hills in the Virginias.

Yes, maybe you can get started in North Carolina area and so we've looked at that. But either way, it's not going to be burning like it would have been, if it had been released in mid year or earlier in the second quarter. I don't know if that answered your question? But that's kind of where we're at.

We had taken the Rockford group and began looking at other business opportunities in anticipation of this. That's why also in my prepared comments I mentioned that I think you'll be pleased to see although we are not -- I don't announce anything until we got it signed sealed and the deal is done. But I think you will see something coming out that will give Josh and them some work to tie them over and then I think we can also add some work on in the event that ACP doesn't materialize this year at all.

Tahira Afzal -- KeyBanc -- Analyst

Got it. Okay, OK. So I mean, I guess David, if there is no ACP this year let me ask it another way, would you still be able to hit the lower end of your guidance?

David L. King -- President & Chief Executive Officer

Yes. Yes, we've looked at the numbers on that Tahira. And of course obviously a 20% -- a $0.20 spread, but we've looked at it in the event that ACP doesn't deliver at all and yes we -- that's why we've given that guidance range in that $1.60 to $1.80. There is plenty of opportunity -- there is a lot of opportunities out there, but we promised our customer and they've told us they think it will start late third quarter, so I've got to keep my resources back for that. If it doesn't then we've got plenty of opportunities to address those resources to other projects.

Tahira Afzal -- KeyBanc -- Analyst

Okay, great. And David just one more and then I'll hop back in the queue. You talked about your -- the increasing petchem LNG opportunities and clearly we've seen several mega projects have been FID-ed and it seems there are many more to come. You were a little more ambivalent on the time line. That said, I know you guys had negotiations with a lot of these companies and developers. I would like to get a little more color on what you're thinking in terms of timing? And if there are uncertainties, what might be driving that?

David L. King -- President & Chief Executive Officer

Okay. And I know your question specifically regarding to LNG and let me answer it in the two ways. I actually think that the time line for our resources being used some of the LNGs don't come in either obviously the first quarter or second quarter. It's probably more in toward the back end of this year, because our first groups that would start would be Jonas Beatty's I&M group. But we're very close also and the reason I mentioned the petchem work is because the other several petchem jobs going on that has the same kind of basis at the start. There is dirt work to be moved and heavy haul roads to be done. And so Jonas group I think will be staying fairly busy until these LNG jobs actually develop toward the latter part of the year. So I really don't see a lot of work on those until the latter part of the year.

Tahira Afzal -- KeyBanc -- Analyst

Got it. Okay. Thank you very much and I'll hop back in the queue.

David L. King -- President & Chief Executive Officer

Sure.

Operator

Our next question comes from Brent Thielmann, D.A. Davidson. Please proceed with your question.

Brent Thielman -- DA Davidson -- Analyst

Thanks. Good morning.

David L. King -- President & Chief Executive Officer

Good morning, Brent.

Kenneth M. Dodgen -- Executive Vice President & Chief Financial Officer

Good morning.

Brent Thielman -- DA Davidson -- Analyst

David I guess on the Power Industrial & Engineering segment you get a nice silver award dropped in the backlog this quarter. I guess as you are finishing up or finished up working and looking on to other opportunities, do you expect that backlog to rebuild as we work through 2019? Are the opportunities robust enough?

David L. King -- President & Chief Executive Officer

I do expect it to be old. I think it will be a little bit slow backlog building in the first quarter. And then I think you will begin to see in the second quarter. Now, obviously, that power project will build it in the first quarter that we got, but there are some of these other projects that we are talking about in the refining and petchem area are just now beginning to be developed and thing. So, I think you won't see those hit the backlog for our industrial group. You will see them hit the I&M and Civil group, but you won't see them hit the Industrial group until possibly late second quarter and then into third quarter.

So, I actually see that beginning to build. And I think I mentioned in my prepared remarks that we kind of see Kevin Smith's team being more backend loaded in the year as opposed to in the first part of the year.

Brent Thielman -- DA Davidson -- Analyst

Okay. And the solar job that you guys announced obviously substantial award. Is that pretty unique or are there other opportunities out there like that?

David L. King -- President & Chief Executive Officer

There's other opportunities. When we committed and we really started with Tim Healy's group and Primoris Renewables group and we can do them either open shop or union depending on which region of the country they're in, but we saw a tremendous opportunity for those.

And then obviously the first fairly sizable one we were able to get our hands around was the one last year out in West Texas, but we see multiple of these. And you can read the same thing, Texas, there are a lot of companies committed to putting more in this Southwest region. And when you look at our West Texas region or even a New Mexico, Arizona wherever you want to go from there for a solar type facility, one of the things you need is obviously the sun and you need cheap land and that kind of comes to bear fruit when you start looking at West Texas. So, yes, we got several of those that we're continuing to look at. So, I don't think you're going to see it as an anomaly. I think you're going to begin to see it as a trend for us.

Brent Thielman -- DA Davidson -- Analyst

Okay, that's great. And then just one on the pipeline business. I know you had a really tough comp last year with respect to the margin, but I was a little surprised to see 10% I guess it's kind of below what we become accustomed to see in the last couple of years. Could you just tell me what the moving parts on the margin for this quarter?

David L. King -- President & Chief Executive Officer

Yes, it was really enough and Ken can add here if he wants to, but it was really to me two things. One, if you remember some of the margin we were getting was obviously of the reimbursable nature of the ACP job. And so it's obviously we don't have the risk side of that so margin there is a little bit smaller which kind of drove our overall typical margins down a little bit.

And the other one although we get the higher margins on the fixed price ,work you mentioned it we had an exceedingly wet time out in West Texas with our Primoris Pipeline group. And so there was probably six to eight weeks there. Those guys were pumping out water and really just redoing work that they've done before. So, obviously, they had a little more cost associated with that than typical. Ken?

Kenneth M. Dodgen -- Executive Vice President & Chief Financial Officer

Yes, David just to add what you said the range we normally expect for that group is 10% to 12%. So, a 10% in Q4 we're a little on the low end of the range for the reasons David talked about. But when you look at the year to your point earlier and compare it to prior years, prior years were much higher than what we would normally expect because of really good weather conditions we have on a couple of jobs down in Florida or for Rockford. So, 10% to 12% is the range we expect for that group. And if you are comparing to prior years, you're going to see prior years being unusually large.

Brent Thielman -- DA Davidson -- Analyst

Okay. I appreciate it. Thank you.

David L. King -- President & Chief Executive Officer

Thanks Brent.

Operator

(Operator Instructions) Our next question comes from Adam Thalhimer, Thompson Davis. Please proceed with your question.

Adam Thalhimer -- Thompson Davis -- Analyst

Hey good morning guys.

David L. King -- President & Chief Executive Officer

Morning Adam.

Kenneth M. Dodgen -- Executive Vice President & Chief Financial Officer

Morning Adam.

Adam Thalhimer -- Thompson Davis -- Analyst

Hey, Ken what are you assuming for interest expense this year?

Kenneth M. Dodgen -- Executive Vice President & Chief Financial Officer

Interest expense is probably going to be very close to what we've experienced in 2018. It's going to be in the low 4s. Our weighted average interest rate as I said was a little under 4.1%. We're seeing interest rates coming back down a little bit and softening right now for new financing on the equipment side. So, I expect it overall it continue to be in the low 4s.

Adam Thalhimer -- Thompson Davis -- Analyst

Low $4 million per quarter?

Kenneth M. Dodgen -- Executive Vice President & Chief Financial Officer

I'm sorry you were thinking dollars I was thinking rate. Per quarter we are looking at probably around and I'm sorry I'm checking something real quick here, probably around $6 million to $7 million per quarter. And that's all in across our term loan and our equipment.

If we -- as we continue to watch this year and how our free cash flow opens up for us if we are able to pay down incremental amounts on our term loan we may see that the interest expense come down in the back half of the year.

Adam Thalhimer -- Thompson Davis -- Analyst

Okay perfect. Let's see you talked about moving some revenue out of transmission into U&D.

David L. King -- President & Chief Executive Officer

Correct.

Adam Thalhimer -- Thompson Davis -- Analyst

How much would that be? And what's the timing on that?

David L. King -- President & Chief Executive Officer

We're going to do it starting in the first quarter so the next quarter results +-- the first quarter results you see from us will have it in there and it's about $40 million. Yes per year of that revenue. That was a I think we mentioned this when we did our due diligence and was really going after that acquisition. They had it stuck in the electrical T&D group. They categorized by default and so by us pulling it out and putting it in the U&D where it more properly belongs we think we can focus it and actually grow that business on the gas side and let the electrical guys grow the business on the T&D side but figure about for the start out about $40 million on annualized basis is really all we're moving over.

Adam Thalhimer -- Thompson Davis -- Analyst

Okay, perfect. And then last one from me. I'm just curious the two pipeline jobs you talked about in West Texas they were under construction in Q4. When do those two jobs finish? And what's your outlook for Texas pipeline in general?

David L. King -- President & Chief Executive Officer

They should finish up this quarter. They may have a little bit that lingers into the second quarter for those two pipeline projects. Now, obviously, as I mentioned also they've got a pretty heavy bid list so getting another one started pretty quickly after that is not too much of a concern for me. What was the other part of that question Adam? I'm sorry.

Adam Thalhimer -- Thompson Davis -- Analyst

Yes. No just if you could expand on the bid list and timing for replacement right?

David L. King -- President & Chief Executive Officer

Yes, most of it is related to really the West Texas Permian Basin. There is still a lot of the bigger pipelines but there's also a lot of lateral lines, smaller lines, both liquids lines as well as some smaller gas lines. And then a lot of people kind of tend to forget that when you have these major projects, whether it's an LNG expansion project or whether it's petchems or anything else, there is a lot of pipelines that go to and from those facilities. And so we -- our Primoris Pipeline group as well as our Primoris Field Services group work on both of those kinds. So it's not only just the stuff coming out of the Permian bringing the actual production, but it's things around the production facilities also.

Adam Thalhimer -- Thompson Davis -- Analyst

Okay. Thanks guys.

David L. King -- President & Chief Executive Officer

Thanks, Adam.

Operator

Our next question comes from Tahira Afzal, KeyBanc. Please proceed with your question.

Tahira Afzal -- KeyBanc -- Analyst

David, I thought I'd bug you a little more.

David L. King -- President & Chief Executive Officer

Sure.

Tahira Afzal -- KeyBanc -- Analyst

I guess, I know the -- if you go back to the Civil construction, I know you kind of hung in there with that. It seems that there might be some chance of an infrastructure bill going through. Any implications for yourself? Or would you like to continue to be fairly selective there and really drive up margins versus early growth?

David L. King -- President & Chief Executive Officer

Yeah, Tahira, we've looked at that. Obviously, when had those Belton area jobs, we looked at that unit, and I mean, we -- as I think, we mentioned to you that meetings and things, we picked that unit up, we turned it upside down, right side out, change management, put better control systems in place relative to what we were bidding and better contract claims, change order processes and everything. That's a great business out there. There's plenty of opportunities. You don't have to worry about the payments and things.

And so now that Mark Buchanan has been running the group for us, it doesn't really reflect yet, because we're still burning off some of those jobs, those legacy jobs that are out there, that don't have any margin with them at all. And so it gets diluted on the jobs that he is actually doing, that he is making pretty good margin performance on. We also as I mentioned in my prepared remarks, we pushed the Civil group to say, we make extremely good margins of our design build projects as opposed to just what we call a rip-and-read, and then obviously, the airports and port facilities.

So on the design build, we said, look, guys, let's get back up there and look at that design build because there are some great opportunities out there. It's kind of public knowledge, although, it's not public knowledge from our perspective, but we've got a design build project. We haven't finished signing the contract only. It has been announced by the Louisiana Department of Transportation. That's a really nice one and that's in an area where we obviously had a lot of experience and strength and things like that.

We also have two other projects in that area that we're currently working on and look at getting some additional work in Louisiana. So both Louisiana and Texas has got plenty of opportunities.

Now that infrastructure bill, it will help, because most of those infrastructure bills have a federal funding portion of that with it, and so any of that continues to help drive that Civil market. So for us, I think, we've turned the corner. I think we said, we were going to be flat and then indeed that's where we kind of a were. I think you'll begin to see the next few quarters hopefully that we'll be turning that ahead in the other direction.

Tahira Afzal -- KeyBanc -- Analyst

Hey, David, that's very helpful. And then I guess last question, it seems like you are largely integrated as you mentioned on Willbros. And I guess not focused on really growth initiatives there. Can you talk a bit on the T&D side a little more if possible, because you follow the budgets from all the utilities and they show pretty promising trends going forward?

David L. King -- President & Chief Executive Officer

Yeah. Tahira, that's a really good question. Let me break it down into two components and I'll hit the distribution, and then I'll come back to the transmission. One reason, we went in that, it's just the growth in there and the number of customers that literally have come to us and tied us up in additional MSAs, and can you get crews over here. And of course, probably our one single biggest problem that we had relative to trying to grow it as fast as we'd like to match the market growth was obviously getting the alignment, which is why we started investing in the training facilities and talking to the customers on what we could do to co-share with them and things of that nature.

But there is a tremendous opportunity. And so what we've done is we've actually been expanding that group organically, OK. And that's where you'll see us expanded organically and as far as the distribution side is concerned. And will our strategic plan will pour a lot of time and effort. Can't remember Ken, can probably tell us the exact number in a moment, but a large portion of our CapEx spending is devoted back to that T&D group.

And if you remember, when we were growing Q3C, we poured a lot of money in the Utilities & Distribution to try to get it in there. So we'll be pouring a lot into there.

Kenneth M. Dodgen -- Executive Vice President & Chief Financial Officer

I think our budget calls for anywhere from $10 million to $15 million of CapEx specifically for T&D group to support their growth initiatives as well as to continue that shift from leased equipment to own equipment.

David L. King -- President & Chief Executive Officer

And then on the transmission side, we began looking at that business and seeing what we can do to expand in some of those areas and it's interesting because it's not only in our T&D group, but we also have a component out in California under our ARB not underground, but under our ARB umbrella that's doing quite a bit of electrical work in California for all the utilities out there not only just PG&E, but all of them.

Tahira Afzal -- KeyBanc -- Analyst

Got it. David, that's very helpful. Thank you.

David L. King -- President & Chief Executive Officer

Thank you, Tahira.

Operator

We have reached the end of the question-and-answer session. And I would like to turn the call over to David King for closing remarks.

David L. King -- President & Chief Executive Officer

Well, thanks to everybody for participating today on our fourth quarter call. We appreciate your interest and we'll be talking with you again at the various conferences. Thank you very much.

Operator

This concludes today's conference. You may disconnect your lines at this time. Thank you for your participation.

Duration: 45 minutes

Call participants:

Kate A. Tholking -- Vice President of Investor Relations

David L. King -- President & Chief Executive Officer

Kenneth M. Dodgen -- Executive Vice President & Chief Financial Officer

Lee Jagoda -- CJS Securities -- Analyst

Tahira Afzal -- KeyBanc -- Analyst

Brent Thielman -- DA Davidson -- Analyst

Adam Thalhimer -- Thompson Davis -- Analyst

More PRIM analysis

Transcript powered by AlphaStreet

This article is a transcript of this conference call produced for The Motley Fool. While we strive for our Foolish Best, there may be errors, omissions, or inaccuracies in this transcript. As with all our articles, The Motley Fool does not assume any responsibility for your use of this content, and we strongly encourage you to do your own research, including listening to the call yourself and reading the company's SEC filings. Please see our Terms and Conditions for additional details, including our Obligatory Capitalized Disclaimers of Liability.

More From The Motley Fool

• 10 Best Stocks to Buy Today

• 3 Stocks That Are Absurdly Cheap Right Now

• 5 Warren Buffett Principles to Remember in a Volatile Stock Market

• The $16,728 Social Security Bonus You Cannot Afford to Miss

• The Must-Read Trump Quote on Social Security

• 10 Reasons Why I'm Selling All of My Apple Stock

Motley Fool Transcribers has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.