X0306 4 2013-03-21 0 0000874238 STERLING CONSTRUCTION CO INC STRL 0001205459 HARPER JOSEPH P SR 20810 FERNBUSH LANE HOUSTON TX 77073 1 0 0 0 Common Stock 2013-03-21 4 A 0 2888 0 A 441136 D These shares were awarded to the Reporting Person by the Company as incentive compensation pursuant to the Reporting Person's employment agreement. The shares are subject to restrictions on their sale or other transfer and to forfeiture under certain circumstances. Roger M. Barzun under a Power of Attorney 2013-03-21