lackland afb inventory & condition assessment...

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– Outdated inventory records – many locations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



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



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



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



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



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

Sanitary Sewer InspectionCont’

Inspection Equipment

Sanitary Sewer InspectionCont’



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



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

Water Distribution System Inspection Cont’



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.



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



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

lackland afb inventory & condition assessment...

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