LACKLAND AFB INVENTORY & CONDITION ASSESSMENT BASE SEWER COLLECTION &WATER DISTRIBUTION SYSTEMS
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1 LACKLAND AFB INVENTORY & CONDITION ASSESSMENT BASE SEWER COLLECTION &WATER DISTRIBUTION SYSTEMS Presenter: Ann Quinn ARCADIS / Malcolm Pirnie Date: May 12, 2011
2 Background Key Drivers AF implementation of activity management plans Outdated inventory records many locations Limited / changing environment Goals Update inventory records Standardize processes for collecting, maintaining, and reporting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
3 What is Needed to Develop the Utilities System AMPs? Accurate Inventory Resource Allocation Standardized Specifications Assets Attributes AMPs Budget Allocation Current & Future Demands Prioritization
4 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
5 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
6 Overview of Assets Lackland Training Annex (MPYJ) Lackland Main Base (MPLS) Excluded Areas: Privatized Housing High Secured Areas Active Construction Areas Sanitary Sewer System Assets Manholes Lift Stations - 7 Pipelines - 52 miles (270,000 linear feet), 1790 segments WaterDistribution System Assets Valves Hydrants Pipelines - 75 miles (360,000 linear feet), 4882 segments Tanks - 7 Wells - 9
7 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 Lackland AFB Utility Grids Asset Number an unique number Assets found in field are given a new ID For Example: WAT-VLV-5-501
8 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
9 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
10 Inspection Equipment Sanitary Sewer Inspection Cont
11 Sanitary Sewer Inspection Cont
12 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
13 Sanitary Sewer System Condition Assessment Examples O&M Grade 3- Encrustation Structure Grade 4- Corrosion Infiltration Grade 5- Gusher
14 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
15 Water Distribution System Inspection Cont
16 Water Distribution System Condition 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
17 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.
18 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
19 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
20 20 18 May ARCADIS Questions?
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