LACKLAND AFBINVENTORY & CONDITION ASSESSMENT –BASE SEWER COLLECTION &WATER DISTRIBUTION SYSTEMS
Presenter: Ann QuinnARCADIS / Malcolm PirnieDate: May 12, 2011
Environment, Energy Security &Sustainability
Symposium & Exhibition
Background Key Drivers– AF implementation of activity management
plans
– Outdated inventory records – many locations
– Limited / changing environment
Goals– Update inventory records
– Standardize processes for collecting, maintaining, and reporting of information
– Maximize GIS geodatabase to become the Authority on current asset inventory and condition information
– Optimize limited money through informed planning
2
What is Needed to Develop the Utilities System AMPs?
Resource Allocation
Budget Allocation
Prioritization
Accurate Inventory
Standardized Specifications
Assets Attributes
Current & Future Demands
AMPs
Environment, Energy Security &Sustainability
Symposium & Exhibition
Scope of Project
Set-Up Tasks– Data Gathering and Review
• Available drawings, reports, personnel interviews– GIS Database of the Sewer Collection and Water
Distribution Systems• Develop Data Dictionaries of Asset Attributes• Standardize Geodatabases
Field Inspection Activities– Field Inspection Plan– Sanitary Sewer System Inspection
• Manhole, Lift Station, and Pipeline Segment Condition Assessment and Attribute Information Collection
• As- Built Field Maps– Water Distribution System Inspection
• Hydrant and Valve Condition Assessment and Attribute Information Collection
• Pipeline Condition Assessment• As- Built Field Maps• Desk Top Water Model• UDF Sequence Development and Execution
Environment, Energy Security &Sustainability
Symposium & Exhibition
Scope of Project
Cont’
Final Deliverables– Updated GIS
• Current Inventory• Updated Physical Attributes• Condition of Assets
– Asset Management Reports• List of Assets to be Repaired/Replaced in
the Near Future and Future• List of Assets Requiring Maintenance• List of Assets Requiring Further Monitoring• List of System Defects
– GIS Needs Assessment Report for Implementation and Maintenance of the GIS
Overview of Assets
Lackland Main Base (MPLS)Lackland Training
Annex (MPYJ)
Excluded Areas:•Privatized Housing•High Secured Areas•Active Construction Areas
• Manholes - 907 • Lift Stations - 7• Pipelines - 52 miles
(270,000 linear feet), 1790 segments
Sanitary Sewer System Assets
• Valves - 2177• Hydrants - 414• Pipelines - 75 miles
(360,000 linear feet), 4882 segments
• Tanks - 7• Wells - 9
WaterDistribution System Assets
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Standardization of Data –
Asset Identification
LAFB Mapping grid system LAFB assigned unique asset ID
–Type of Asset – follows USAF Installation Geospatial Information & Services (IGI&S) Standards
– Grid Number – follows LacklandAFB Utility Grids
– Asset Number – an unique number
Assets found in field are given a new ID For Example: WAT-VLV-5-501
Environment, Energy Security &Sustainability
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Standardization of Data –
Utilities GIS
Attribute information organized in utility layers using USAF IGI&S Standards
– Everything linked to Asset IDs– Physical, Service and Construction
Attributes– Structural and O&M Condition Ratings
Standardization of Spatial Representation
– GPS coordinates– Connectivity - Segments and point
features snapped correctly– Hydraulic Modeling - Direction of
segments digitized correctly Media Files: Personal geodatabase
hyperlinked to media files held on ORACLE server
Environment, Energy Security &Sustainability
Symposium & Exhibition
Sanitary Sewer
Inspection
Manhole and pipeline zoom camera inspection
As-built field maps with revised manholes and pipelines
Verified flow direction with dye testing Collected asset attributes Condition assessment using Pipeline
Assessment Certification Program (PACP) and Manhole Assessment (MA) protocol criteria by National Association of Sewer Services Companies (NASSCO)
Assessment includes structural, O&M, and infiltration and inflow (I&I) condition of each asset
Environment, Energy Security &Sustainability
Symposium & Exhibition
Sanitary Sewer
System Condition
Assessment
O&M grade determined by potential for developing blockage and other flow impediments which may lead to backups and overflows
I&I grade determined by observed source: gusher, runner, dripper, weeper, or no I&I
The overall condition rating of the asset determined by the highest grade defect or observation
Sanitary Sewer System Condition Assessment Examples
O&M Grade 3-Encrustation
Structure Grade 4-Corrosion
Infiltration Grade 5-Gusher
Environment, Energy Security &Sustainability
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Water Distribution
System Inspection
Valves and fire hydrant inspected and evaluated for mechanical structural condition ratings
Valves are actuated to determine sizing Water pipeline inspection includes leak
detection, pressure flow, and Hazen-Williams coefficient tests
– Leak detection test is a two-step-process which consists of a hydrophone survey of all fire hydrants followed by use of correlators to find specific leak locations along the pipeline
– The flow tests are performed on 20 locations throughout the system to determine the efficiency and adequacy of the system to deliver water
– The Hazen Williams coefficient test are performed at 12 locations to determine the condition of the pipelines
Environment, Energy Security &Sustainability
Symposium & Exhibition
Water Distribution
SystemCondition
Assessment
Fire Hydrants:Assessment of the mechanical condition is prioritized based on urgency to restore
– Immediately – impossible to operate or major defect
– Urgent – major condition related to outlet, caps, corrosion
– Urgent – minor condition related to outlet, caps, corrosion or fire hydrant water tightness – need to dismantle to restore
– Urgent - minor condition related to outlet, caps, corrosion – do not need to dismantle to restore
– Eventually – minor condition related to fire hydrant environment
Valves:– Mechanical condition is related to manipulation,
water tightness, and corrosion– Structural condition is related to breakage,
defects and deterioration
GIS Update
Attribute information collected in the field is downloaded into the GIS.
Field as-built markups are entered into the GIS.
Condition ratings are downloaded into the GIS.
Videos are hyperlinked to the GIS.
Environment, Energy Security &Sustainability
Symposium & Exhibition
GIS Needs Assessment
Maintenance of Utilities GIS – Need to develop protocol to maintain
the GIS up-to-date with new projects and future maintenance activities.
– Need to provide access to departments requiring information from the GIS to perform their job responsibilities.
Requirements– Standardization of data required from
Contractors– Implement dataflow and workflow
processes – Collaborate effort– Provide hardware and software– Training of personnel
Environment, Energy Security &Sustainability
Symposium & Exhibition
Lessons Learned
Additional efforts required to investigate inventory Digitization of As-built archive
DWG’s into GIS Required LAFB Shop support Active versus abandoned assets