VTrans Small Culvert Inventory

The Vermont Agency of Transportation (VTrans) is responsible for the maintenance of a large, complex drainage system composed of culverts, drop inlets and access holes. Deterioration of these hidden assets poses potential safety hazards to the traveling public though roadway sinkholes and side slope instability caused by drainage erosion. Subscribe to receive updates to this dataset: https://forms.office.com/g/aeHHFdQNe9 Traditionally, VTrans has maintained a well-developed program as part of the National Bridge Inventory System (NBIS) to address culverts 72” or greater in dimension. The Small Culvert Inventory (SCI) was designed as a compliment to that program intended to locate and catalog all state-owned culverts less than 72” in diameter. However, to ensure that there are no culverts that fall between the NBIS and the SCI, the SCI will inventory all culverts with a measured internal dimension equal to 72”. The inventory of these structures assesses their location, composition, asset condition and local site conditions. The SCI provides the framework for continued monitoring and condition assessments in the future providing the ability to prioritize maintenance, repairs and replacements. At the current point in the program’s maturity, the Agency has collected the initial inventory of culvert data across the state and the focus has shifted from collection of new data to the maintenance and improvement of existing data. At present, the Maintenance Division aims to reinspect all known culverts every 5 years, or roughly 20% of state-owned culverts every year. Inspections are predominantly accomplished using mobile devices with accuracy of 15 ft or better. For culverts that are difficult to access due to configuration (closed system - i.e. drop inlets) or other contextual constraints, Maintenance Division may employ specialized devices, including, but not limited to Utility cameras, 1/10 scale remote controlled off the shelf vehicles retrofitted with cameras (Hydraulic Inspection Vehicle Explorer or HIVE), or purpose-built culvert inspection solutions such as those configured by iPEK. Data is scheduled to update daily.佛蒙特州交通局（Vermont Agency of Transportation, VTrans）负责维护一套规模庞大、结构复杂的排水系统，该系统由涵洞、落水口与检修孔组成。这些隐蔽基础设施的劣化，可能因排水侵蚀引发路面塌陷与边坡失稳，进而对道路出行公众构成潜在安全隐患。订阅此数据集更新请访问：https://forms.office.com/g/aeHHFdQNe9。传统上，VTrans依托国家桥梁库存系统（National Bridge Inventory System, NBIS）建立了完善的项目体系，用于处理尺寸不小于72英寸的涵洞。小型涵洞库存项目（Small Culvert Inventory, SCI）作为该体系的补充方案，旨在定位并编目所有州属直径小于72英寸的涵洞。为确保不存在覆盖盲区，即未被NBIS与SCI纳入范围的涵洞，SCI将对所有实测内部尺寸恰好为72英寸的涵洞开展编目工作。该库存项目会评估各类涵洞的位置、构造组成、资产健康状况以及当地场地条件，为后续的持续监测与状况评估提供基础框架，进而支持养护、维修及更换工作的优先级排序。随着该项目发展至当前成熟阶段，佛蒙特州交通局已完成全州范围内的初始涵洞数据采集工作，当前工作重心已从新数据收集转向现有数据的维护与优化。目前，养护部门计划每5年对所有已知涵洞完成一次复检，即每年完成约20%的州属涵洞复检任务。检测工作主要通过移动设备开展，定位精度可达15英尺（ft）及以上。对于因结构配置（如封闭系统的落水口）或其他环境限制难以进入的涵洞，养护部门可采用专用检测设备，包括但不限于工业摄像头、加装摄像头的1/10比例商用遥控车辆（液压检测车探索者，Hydraulic Inspection Vehicle Explorer, HIVE），以及iPEK定制的专用涵洞检测解决方案等。本数据集计划每日更新。