Laserfiche WebLink
<br />4-2.2 Inventory Data <br /> <br />Accurate inventory records are fundamental to the management of inspection and <br />maintenance programs. Inventory records serve as a data base for planning, <br />scheduling, and reporting inspection and maintenance activities. <br /> <br />Bridge culvert information such as the identification number assigned to the <br />structure, location, type of structure, number of spans, cells or barrels, <br />length of span, road or facility served by the structure, and the stream or <br />feature crossed by the structure should be available since this data is <br />required in accordance with the Coding Guide under items 1 through 57. This <br />data may also be available on inventory cards or forms maintained by <br />maintenance personnel. <br /> <br />If inventory data is not currently available on small culverts, inventory <br />guidelines should be established for the size of culvert to be inventoried and <br />the amount of data to be collected. As previously mentioned an initial <br />inventory requires a significant effort and may represent a sizeable <br />investment of manpower. Inventory listings and cards should be kept current <br />as work is done on a structure or as a replacement is accomplished. A sample <br />inventory card is shown in exhibit 32. <br /> <br />4-2.3 Structure Files. <br /> <br />Structure files are used to maintain detailed information on each important <br />structure. A thorough study of the available historical information can be <br />extremely valuable in identifying possible critical areas of structural or <br />hydraulic components and features. Because this information may require <br />considerable effort to assemble, a separate file should be established for <br />each structure. <br /> <br />The contents of any particular file may vary depending upon the size and age <br />of the structure, the functional classification of the road carried by the <br />structure, and the informational needs of the agencies responsible for <br />inspection and maintenance. A very small culvert may be documented in an <br />inventory listing or with a file that contains little more than an inventory <br />card plus dates and comments of previous inspections. For larger culverts it <br />is recommended that the following types of information be assembled when <br />possible: <br /> <br />a. Construction and Design Data--"As built" or design plans should be <br />included in a structure file. If plans are not available, the following types <br />of construction information should be determined: date built; type of <br />structure including size, shape and material, wall thickness (or gauge); class <br />of pipe; joint types, size of corrugations if applicable; height of cover; end <br />treatments; type and thickness of pavement; design capacity; and design <br />service life. Standard drawings that indicate minimum and maximum allowable <br />depth of cover, wall thickness, gauge, and end treatments are often as useful <br />as plans. Hydraulic data should also be assembled where available, including <br />slope of structure; elevation of inverts, stream channel and water surface <br />during normal and high flows, design storm frequency, drainage area, design <br /> <br />4B <br />