Ron Bumann

Construction Practices Specialist

State Aid for Local Transportation

1123 Mesaba Avenue

Duluth, MN.. 55811

cell: 218/310-1644ronald.bumann@state.mn.us

http://www.dot.state.mn.us/stateaid/sect_construction.html

Mn/DOT AUDIT

STATE AID FOR LOCAL TRANSPORTATION DIVISION

FISCAL YEAR 2010

SINGLE AUDIT

11 City/County Projects Audited Fiscal Year 2010

• St. Louis County $1,895,908• Cook County $3,159,060• Kittson County $809,842• Kittson County $774,234• City of St. Michael $2,153,763• City of Moorhead $17,720,630• Traverse County $1,441,828• Goodhue County $2,996,740• Steele County $3,875,394• Martin County $2,443,450• City of Richfield $25,224,918• City/County Project Total $62,495,767

FINDING 1 – ADDITIONAL PROJECT MANAGEMENT ATTENTION NEEDED TO ATTAIN COMPLIANCE WITH MATERIALS CONTROL REQUIREMENTS FOR BRIDGE

CONCRETE AND STEEL

Certified Mill Test Reports were not obtained for 18% of the bridge structural steel valued at $4.8 million.

Monthly concrete aggregate quality testing not done.

Material passing the #200 sieve for coarse aggregate testing, required as part of aggregate quality testing, was not done.

Slump tests not taken after corrective action.

Project personnel missed concrete admixture testing for the air entraining agent and water reducer.

After receiving written instruction to ensure that the concrete was properly mixed, the Contractor continued to place concrete into the roadway that was not properly mixed.

All 4 Quality Assurance (QA) tests for material passing the #200 sieve for coarse aggregate did not meet requirements, with results ranging from 1.08 to 2.39 percent compared to the standard of 1.0 percent. All 4 Contractor Quality Control (QC) tests met requirements. Acceptance is based on QA results. Project personnel did not perform additional Quality Assurance (QA) testing required to verify corrective action taken. Project management was unaware of the tests not meeting requirements of which was identified by the audit.

Cores for thickness not taken

FINDING II – NEED TO IMPROVE COMPLIANCE WITH MATERIALS CONTROL REQUIREMENTS FOR

PAVING CONCRETE

Questioned costs totaled $1.3 million, a significant improvement over the Fiscal Year 2009 Grading and Base Materials Control questioned costs total of $9.9 million. However, the Audit Report recommends taking appropriate action as necessary to hold responsible personnel accountable.

Bitumen Content – Sample and test prior to placement.

Quality Assurance Gradations – Review the Random Sampling Gradation Acceptance Method.

Moisture Content – Requirement of Quality Compaction, unless modified in the special provisions.

Grading & Base Reports are required to be submitted to the Grading and Base Office.

Review specifications for crushing requirements.

FINDING III – IMPROVEMENTS NOTED FOR GRADING AND BASE MATERIALS CONTROL

COMPLIANCE

Review the special provisions and Schedule of Materials Control for testing requirements.

Review the special provisions and specifications placement requirements.

FINDING IV – NEED TO COMPLY WITH MATERIALS CONTROL REQUIREMENTS FOR STABILIZED FULL DEPTH BITUMINOUS PAVEMENT RECLAMATION

Project personnel did not ensure that the Notification of Intent to Perform a Bridge Demolition was submitted to Minnesota Pollution Control Agency 10 days prior to the start of demolition as required.

Project personnel used a “Local Bridge Replacement Program Asbestos Screening Tool” to assess asbestos for a bridge removal. The screening tool did not address other regulated materials, such as lead. The bridge materials included lead paint. 40 Code of Federal Regulations 61.145 requires an inspection prior to demolition. Minnesota Rules Chapter 4620.3 requires the inspection to be performed by a person certified by the Minnesota Department of Health.

These processes are required regardless of funding types.

Proper documentation of disposition of materials is crucial to the requirements.

FINDING V – BRIDGE AND BUILDING REQUIREMENTS WERE NOT MET

http://www.dot.state.mn.us/stateaid /index.html

http://www.dot.state.mn.us/stateaid/sa_construction.html

http://www.dot.state.mn.us/const/tools/index.html

http://www.mrr.dot.state.mn.us/pavement/bituminous/ bituminous.asp

% Density (2)

SP Wear, and SP Shoulder (4%

Void)

% Density (2)

SP Non-Wear, SP Shoulder (3% Void)

Mat Density Pay Factor A

Traffic Level2 & 3

Traffic Level4 & 5

93.6 and above 94.6 and above 1.03(3) 1.05(3)

93.1 – 93.5 94.1 – 94.5 1.02(3) 1.04(3)

92.0 - 93.0 93.0 - 94.0 1.00 1.0091.0 - 91.9 92.0- 92.9 0.98 0.9890.5 - 90.9 91.5 - 91.9 0.95 0.9590.0 - 90.4 91.0 - 91.4 0.91 0.9189.5 - 89.9 90.5 - 90.9 0.85 0.8589.0 - 89.4 90.0 - 90.4 0.70 0.70

Less than 89.0 Less than 90.0 (4) (4)

DRAFT / NEWTable 2360.6-B4

Payment Schedule for Maximum Mat Density

% Density (2)

Long. Joint (Confined Edge)

LJ Pay Factor B(Confined Edge)

% Density (2)

Long. Joint(Unsupported

Edge)

LJ Pay Factor C(Unsupported Edge)

Traffic Level2 & 3

Traffic Level4 & 5

Traffic Level2 & 3

Traffic Level4 & 5

92.1 and above 1.02 (3) 1.03 (3) 91.0 and above

1.02 (3) 1.03 (3)

91.6-92.0 1.01 (3) 1.02 (3) 90.1-90.9 1.01 (3) 1.02(3)

89.5-91.5 1.00 1.00 88.1-90.0 1.00 1.0088.5-89.4 0.98 0.98 87.0-88.0 0.98 0.9887.7-88.4 0.95 0.95 86.0-86.9 0.95 0.9587.0-87.6 0.91 0.91 85.0-85.9 0.91 0.91

Less than 87.0 0.85 0.85 Less than 85.0 0.85 0.85

DRAFT / NEWTable 2360.6-B4a LJ (5)

Payment Schedule for Longitudinal Joint Density

(SP Wear and SP Shoulder (4% Void)

% Density (2)

Long. Joint (Confined Edge)

LJ Pay Factor A(Confined Edge)

% Density (2)

Long. Joint(Unsupported

Edge)

LJ Pay Factor B(Unsupported Edge)

Traffic Level2 & 3

Traffic Level4 & 5

Traffic Level2 & 3

Traffic Level4 & 5

93.1 and above 1.02 (3) 1.03 (3) 92.0 and above

1.02 (3) 1.03 (3)

92.6-93.0 1.01 (3) 1.02 (3) 91.1-91.9 1.01 (3) 1.02(3)

90.5-92.5 1.00 1.00 89.1-91.0 1.00 1.0089.5-90.4 0.98 0.98 88.0-89.0 0.98 0.9888.7-89.4 0.95 0.95 87.0-87.9 0.95 0.9588.0-88.6 0.91 0.91 86.0-86.9 0.91 0.91

Less than 88.0 0.85 0.85 Less than 86.0 0.85 0.85

DRAFT / NEWTable 2360.6-B4b LJ (5)

Payment Schedule for Longitudinal Joint Density (SP Non-Wear and SP Shoulder (3% Void))

Crow Wing County

Pine County

Hubbard County - Benedict

St Louis County - Ely

St Louis - Ely

Park Rapids

Norman County

CSI – Patcher

Douglas County

City of Duluth

Clay County

Clay County

Park Rapids

Park Rapids

Pine County

Crow Wing

Crow Wing

City of Grand Rapids

Aitkin County

City of Brainerd

Deck Failure

Becker County – Detroit Lakes

City of East Grand Forks

City of East Grand Forks

Aitkin County – Hill City

City of Moorhead

City of Moorhead

Blue Earth - Mankato

Polk County – Red River

Polk County – Red River

St Louis County – Giants Ridge

Todd County - Staples