Infrastructure output grew marginally last year, official figures have revealed.
The Office for National Statistics released data showing £15.27bn of new build infrastructure work was done across the public and private sectors in 2014.
This was up from £15.16bn the year before, but remained below the 2011 peak of £15.33bn.
Public sector spending on new infrastructure grew 5% in 2014 to £5.9bn – its highest level this century.
This outweighed a 2% drop in private sector new infrastructure work in 2014 to £9.4bn, its lowest level since 2010.
The volume of electricity work soared by almost half in 2014 to £5.4bn, more than was done in 2011 and 2012 combined.
Highways work also grew, by a fifth, to £3.1bn, while harbours output was up 39% to £834M.
The value of gas work was up by £1M to £379M but five infrastructure subsectors saw declining values last year.
Rail output dropped 27% to £3.4bn. Water work slipped 41% to £932M, and the sewerage sector lost 30% at £384M.
Airport opportunities declined 13% to £675M and communications work was down 59% to £127m.
More than half of new build infrastructure work in 2014 was delivered by civil engineering firms, according to the data. Buildings contractors took more than £2bn of the sector’s new build work, however, and specialised companies a further £4.6bn.
On the other hand, less than half of new work carried out by civils firms was classified as infrastructure. Civils contractors pocketed £3.9bn of housing work, £3.3bn of commercial contracts and £1.5bn of other public sector opportunities.
When it comes to repair and maintenance work, 71% of the pie was eaten civil engineering companies.
In the roads sector, firms with between 35 and 59 employees did the most work, bagging £804M last year.
On the railways, however, firms with just 2 or 3 members of staff secured £744M, making this the most profitable size.
The number of people employed by civil engineering firms registered in the UK dropped by 0.9% to 184,200 between the third quarter of 2013 and the same quarter in 2014, according to the data.
This was despite the number of civils firms growing by less than 1% over the same period to 19,436.
Economists this week said the size of the infrastructure sector could double within five years.