Manhole Assessment
Pipeline Assessment and Certification Program (PACP)
&
Manhole Assessment Certification Program (MACP)
Ted DeBoda, PE
Outline
NASSCO
Defects and Observations
Inspection and Defect Coding
Deliverables
4
Introduction to NASSCO
Background
The National Association of Sewer
Service Companies (NASSCO) is a
not-for-profit
corporation serving all
areas of the
pipeline assessment
and rehabilitation industry since
1976
6
Introduction to NASSCO
Mission
NASSCO, the National Association of
Sewer Service Companies, is
committed to setting industry
standards for the assessment and
rehabilitation of underground
pipelines, and to assure the continued
acceptance and growth of trenchless
technologies.
7
Introduction to NASSCO
Membership
• Membership Categories–
Contractor
–
Associate (Manufacturers/Suppliers)
–
Professional (Engineers/Consultants)
–
Public Agencies
• Membership continues to grow (doubled in the last 5 years)
8
Background of Industry
Standardization
Industry in US had no standards NASSCO led effort to develop
Based on Water Research Centre codes
– Many years of use in UK
– WRc providing consulting services to NASSCO
Standardization includes multiple software options,
multiple contractors, industry acceptance, standardized training, and technical support
– Standardization concept more important than the benefits of one code system compared to another
Standardized Learning
Crack and Fracture
Fracture = visibly open Crack = not open
120.3 JO M
120.3 FS J 03 08
30.4 RFB 11
Manhole Component Observations Form Manhole Component Observations Form Manhole Component Observations Form Manhole Component Defect Form
Manhole Component Observations Form Manhole Component Defect Form
Manhole Component Observations Form Manhole Component Defect Form Manhole Component Observations Form
Missing
Note:
When the frame is missing, other fields related to the frame
0.4 CMI MB 12 12 0.4 CMI MML L 12 12
0.5 CMI IR 10 03 1.2 COI IR S 1.9 WI IR S 10 03 10 03 S01
10.4 WI SRC 12 12
9.4 WI MB 05 07
6.2 WI RBB J 05 11
0.4 CMI MB 12 12 0.4 CMI MML L 12 12
10.4 WI SRC 12 12
. . . .
111.3 B J 09 03
. . . .
1
Manhole Rehab
Recommendations
Frame and Cover Replacement Frame Adjustment
Mechanical Seal Liner
2 or
Manhole Rehab
Recommendations
Cured-in-Place Liner ReplacementReference PACP Manhole Specification Guidelines
RECENT CHANGES TO
NASSCO PACP
• Hinge Defects (Ver. 4.43)
– CH2, CH3, CH4 – FH2, FH3, FH4
• Lining Features (Ver. 4.43)
– LFAS – Annular Space – LFBU – Bulges
– LFDC – Discoloration – LFDL – Delamination – LFRS – Resin Slug – LFPH – Pinholes
• Buckling Code (K) (Ver. 6.0)
– KW – Buckling Wall – KD – Buckling Dimpling
– KI – Buckling Inverse Curvature
• When more than one longitudinal crack (CL) and/or fracture (FL) occur at the same footage
• These defects should be parallel and not intersect • These defects are seen at 12, 06 & 03, 09 o’clock
positions
• LFAS – Annular Space
– The liner does not closely fit against the host pipe – A gap between the liner and the host pipe is visible
• LFBU – Bulges
– The host pipe contains intruding defects (broken pipe, taps) that bulge the liner
• LFDC – Discoloration
– Liner with abnormal coloration
• Refer to deformations and other defects without loss of visible structural integrity in flexible pipes • Plastic, pitch fiber pipes, metal, etc.
• Flexible pipes are expected to deflect to allow pipe interaction with soil. However, excessive
deflection and other surface damages are signs of structural distress
Buckling Wall (KW)
Distance (feet) Video Ref Code Continuous defect Value Joint Circumferential location Group / Descrip Modifier / severity S/M/ L Inches % At / from To 1st 2nd 25.8 KW 08 03Buckling – Dimpling (KD)
Distance (feet) Video Ref Code Continuous defect Value Joint Circumferential location Group / Descrip Modifier / severity S/M/ L Inches % At / from To 1st 2nd 7.5 KD 04Buckling – Inverse Curvature (KI)
Distance (feet) Video Ref Code Continuous defect Value Joint Circumferential location Group / Descrip Modifier / severity S/M/ L Inches % At / from To 1st 2nd 1.2 KI 10 12• Measurements of defects less than 3 feet (1 m) may be added to the value-inches column
• Digital measurements allowed to 3 decimal points • Deformed Vertical and Horizontal can refer to
other than brick sewers.
• Syllabus change – 2 full days
• Additional video and training material
PACP Version 6.0 Training
Changes
MACP® Version 6.0 Content Changes
• Two Levels of Inspection
– Level 1
• Basic condition assessment information • Determines if Level 2 inspection
necessary – Level 2
• Fully document defects
• Specific Information to recommend corrective actions
MACP® Version 6.0 Content Changes
• Additional Training Materials
– More component details
MACP® Version 6.0 Content Changes
• Manhole Component Defect Form (for Level 2 Inspections)
– Similar to PACP® CCTV Inspection Form – Includes two additional columns
• Component • Step
MACP® Version 6.0 Training Changes
• PACP is STILL a Prerequisite • New Syllabus – 4.5 to 5 hours
LACP® Version 6.0
• New in PACP® 4.3
• Very similar to PACP® • Emphasis on
– Types of Lateral Inspections and Lateral configurations
PACP®, MACP®, and LACP®
Upcoming Changes
• User Recertification – 3 year certifications
– Recertification Training being developed
• Trainer Recertification
– No automatic recertification – New Application Process – New Training Syllabus