2013-254A - Laserfiche WebLink

Home Browse Search

Addendum # 1 11 -06-2013 times the square root of the distance in miles . ❑ (c) All surveys and maps or reports with elevation data shall indicate the datum and a description of the benchmark(s ) upon which the survey is based . 13 (d ) Minor elevation data may be obtained on an assumed datum provided the base elevation of the datum is obviously different than the established datum . (2) Horizontal Feature Accuracy : ❑ (a) Horizontal Control : All surveys and maps or reports expressing or displaying features in a publicly published coordinate system shall indicate the coordinate datum and a description of the control points upon which the survey is based . ❑ ( b) Minor coordinate data may be obtained and used on an assumed datum provided the numerical basis of the datum is obviously different than a publicly published datum . ❑ ( c) The accuracy of control survey data shall be verified by redundant measurements or traverse closures . All control measurements shall achieve the following closures : Commercial/High Risk Linear : 1 foot in 10 , 000 feet , Suburban : Linear: 1 foot in 7 , 500 feet , Rural : Linear: 1 foot in 5 , 000 feet , ❑ (d ) When statistical procedures are used to calculate survey accuracies , the maximum acceptable positional tolerance , based on the 95% confidence level , should meet the same equivalent relative distance standards as set forth in 61G17= 6 . 003(3 )( p)(2 . )( c) F .A. C . ❑ (e ) Intended Display Scale : All maps or reports of surveys produced and delivered with digital coordinate files must contain a statement to the effect of: " This map is intended to be displayed at a scale of 1 /_ or smaller" . 61 G17-6 . 004 Specific Survey, Map , and Report Requirements ( 1 ) As= Built/Record Survey : ❑ ( a ) Obtained field measurements of vertical or horizontal dimensions of constructed improvements so that the constructed facility can be delineated in such a way that the location of the construction may be compared with the construction plans . ❑ ( b) Clearly shows by symbols , notations , or delineations , those constructed improvements located by the survey. ❑ (c) All maps prepared shall meet applicable minimum technical standards . ❑ (d ) Vertical and horizontal accuracy of the measurements made shall be such that it may be determined whether the improvements were constructed consistent with planned locations . ( END OF SECTION ) 01025- 19 Technical Specifications F :\Public Works\ENGINEERING DIVISION PROJECTS\1336-Gifford Senior Ballfield\Admin\bid documents\ADDENDUMS\Technical Specifications.doc