IGF::OT::IGF SURVEY, MAPPING - ENGINEERING SERVICES (BROOKS ACT) SURVEY AND MAPPING SERVICES: THE WORK WILL PRINCIPALLY BE FOR SURVEYS FOR PREDESIGN TOPOGRAPHIC MAPPING NEEDED IN SUPPORT OF THE ENGINEERING, DESIGN, AND DEVELOPMENT OF FUTURE CONSTRUCTION IMPROVEMENT PROJECTS. SURVEY ACTIVITIES WILL GENERALLY CONSIST OF THE FOLLOWING TYPES OF PRELIMINARY SURVEYS: CONTROL TRAVERSES, TOPOGRAPHIC, PLANIMETRIC, CADASTRAL SERVICE (WITH APPROVAL FROM THE BUREAU OF LAND MANAGEMENT); GPS CONTROL, SUBSURFACE UTILITY RESEARCH AND MAPPING AND AERIAL AND GROUND CONTROL. THE WORK MAY ALSO CONSIST OF CONSTRUCTION STAKEOUT SURVEYS, BOUNDARY SURVEYS AND THE USE OF GROUND PENETRATING RADAR FOR INFORMATION ON UTILITIES, MATERIALS AND POTENTIAL OBSTRUCTIONS. PHOTOGRAMMETRIC FACILITIES MUST BE CAPABLE OF PRODUCING TOPOGRAPHIC MAPPING THAT CONFORMS TO THE ASPRS ACCURACY STANDARDS. PRELIMINARY SITE SURVEYS TYPICALLY RANGE FROM 1 TO 20 ACRES IN SIZE, AND UTILITY AND ROAD SURVEYS ARE USUALLY LESS THAN 4 MILES IN LENGTH. ALL WORK WILL GENERALLY BE ASSOCIATED WITH FEDERAL AND LOCALLY OWNED ROADS ON, OR LEADING TO FEDERAL LAND. ALL WORK WILL BE GUIDED BY A STATEMENT OF WORK FOR EACH TASK ORDER PLUS RELATED NPS POLICIES AND DIRECTIVES.