| 2011 | 1 | 0 | $0 | $0 | - |
| NORTHERN EXCAVATORS, INC. EMPLOYEE WELFARE BENEFIT PLAN AND TRUST TRUSTEE MAVEN LLC | - | - | - | - | - |
| 2010 | 1 | 2 | $180,957 | $0 | - |
| NORTHERN EXCAVATORS INC EMPLOYEE WELFARE BENEFIT PLAN AND TRUST TRUSTEE MAVEN LLC | - | 2 | $180,957 | - | - |
| 2009 | 1 | 2 | $206,707 | $0 | - |
| NORTHERN EXCAVATORS INC EMPLOYEE WELFARE BENEFIT PLAN AND TRUST TRUSTEE PROFESSIONAL BENEFIT TRUST LTD | - | 2 | $206,707 | - | - |
| 2008 | 1 | 2 | $236,166 | $0 | - |
| NORTHERN EXCAVATORS, INC EMPLOYEE WELFARE BENEFIT PLAN AND TRUST TRUSTEE PROFESSIONAL BENEFIT TRUST LTD | - | 2 | $236,166 | - | - |
| 2007 | 1 | 2 | $0 | $0 | - |
| NORTHERN EXCAVATORS, INC EMPLOYEE WELFARE BENEFIT PLAN AND TRUST TRUSTEE PROFESSIONAL BENEFIT TRUST LTD | - | 2 | - | - | - |
| 2006 | 1 | 2 | $267,314 | $0 | - |
| NORTHERN EXCAVATORS, INC EMPLOYEE WELFARE BENEFIT PLAN AND TRUST TRUSTEE PROFESSIONAL BENEFIT TRUST LTD | - | 2 | $267,314 | - | - |
| 2005 | 1 | 2 | $255,819 | $0 | - |
| NORTHERN EXCAVATORS, INC EMPLOYEE WELFARE BENEFIT PLAN AND TRUST TRUSTEE PROFESSIONAL BENEFIT TRUST LTD | - | 2 | $255,819 | - | - |
| 2004 | 2 | 2 | $246,988 | $0 | - |
| NORTHERN EXCAVATORS, INC EMPLOYEE WELFARE BENEFIT PLAN AND TRUST TRUSTEE PROFESSIONAL BENEFIT TRUST LTD | - | 2 | $246,988 | - | - |
| Northern Excavators Inc. Profit Sharing Trust | - | 0 | - | - | - |
| 2003 | 2 | 1 | $0 | $0 | - |
| Northern Excavators Inc. Employees Money Purchase Pension Plan & Trust | - | 0 | - | - | - |
| Northern Excavators Inc. Profit Sharing Trust | - | 1 | - | - | - |
| 2002 | 1 | 3 | $0 | $0 | - |
| Northern Excavators Inc. Employees Money Purchase Pension Plan & Trust | - | 3 | - | - | - |
| 2001 | 2 | 3 | $0 | $0 | - |
| Northern Excavators Inc. Profit Sharing Trust | - | 3 | - | - | - |
| Northern Excavators Inc. Employees Money Purchase Pension Plan & Trust | - | 3 | - | - | - |
| 2000 | 2 | 3 | $0 | $0 | - |
| Northern Excavators Inc. Profit Sharing Trust | - | 3 | - | - | - |
| Northern Excavators Inc. Employees Money Purchase Pension Plan & Trust | - | 3 | - | - | - |
| 1999 | 2 | 3 | $723,629 | $23,188 | $7,729iApproximate average salary by contribution assumption: employee only about $193,233 at 4% or $128,822 at 6%; with 50% employer match about $128,822 at 4% or $85,881 at 6%; with 100% employer match about $96,617 at 4% or $64,411 at 6%. |
| Northern Excavators Inc. Profit Sharing Trust | - | 3 | $545,130 | $13,913 | $4,638iApproximate average salary by contribution assumption: employee only about $115,942 at 4% or $77,294 at 6%; with 50% employer match about $77,294 at 4% or $51,530 at 6%; with 100% employer match about $57,971 at 4% or $38,647 at 6%. |
| Northern Excavators Inc. Employees Money Purchase Pension Plan & Trust | - | 3 | $178,499 | $9,275 | $3,092iApproximate average salary by contribution assumption: employee only about $77,292 at 4% or $51,528 at 6%; with 50% employer match about $51,528 at 4% or $34,352 at 6%; with 100% employer match about $38,646 at 4% or $25,764 at 6%. |