Lake County Forest Preserve District

Middlefork Savanna Trail Connection

Making a Connection

Within the Middlefork Savanna Forest Preserve in Lake County, 一组铁路轨道服务Metra和一些货运线路, prevented residential communities, Lake Forest Academy, and Townline Community Park, 从安全进入伊利诺伊自然保护区的多用途步道.

A Divide that Needed Bridged

米德尔福克草原步道连接为行人和骑自行车的人创造了一个更安全的环境,它提供了一条新的8英尺宽的共享步道,将用户群与森林保护区步道网络连接起来.  The centerpiece of the project was the new bridge, 提供森林湖内唯一的行人/自行车轨道交叉点. 该步道连接也是连接更大的区域步道网络的努力的一部分,如北岸步道, the Des Plaines River Trail, the Skokie Valley Trail, and the Robert McClory Trail.

Civiltech provided Phase I, Phase II, Phase III, 和结构十大赌博平台排行榜作为这个令人兴奋的项目的主要顾问. 每个阶段都有独特的挑战,需要广泛的利益相关者协调.

This Project Incorporates the Following:

  • Reuse of historic structures
  • Multi-use path realignment
  • ADA compliance
  • Complex construction parameters
  • Metra and railroad coordination
  • Landscape preservation
  • Multiple IDOT department coordination

Scope of Services

  • Project Development Report
  • Preparation of Contract Plans, Specifications, and Estimates
  • Multiuse Bridge
  • Bikeway and Pedestrian Facility Design
  • Traffic Signal Design
  • Interagency Coordination
  • Resident Engineering
  • Construction Documentation
  • Coordination and Public Involvement
  • QC/QA Material Testing

Preserving History, Preserving Nature

湖泊森林学院位于前J. Ogden Armour Estate.  The former estate’s drive had come from the east, crossing the railroad tracks, and terminating at the site on the west side of the tracks.  1954年,阿玛尔庄园原有的桥梁结构被拆除, however decorative, concrete, abutments remained on either side of the tracks.  civtech选择将新桥定位在历史桥台的同一位置, 哪个作为所有对齐方案的起始点.

为新路径开发一致性的一个挑战涉及在仍然满足ADA可访问性需求的同时维护某些树.  为了适应轨道西侧的道路,不得不移走了一大片树木. 由于一些树木的年龄或大小,它们很重要,民用科技公司对替代树木进行了改进,以避免损坏或移除它们.  另一个重要的挑战是确定安全、方便的位置,在轨道西侧的道路和十字路口安装带有行人和自行车驱动装置的新人行横道. 新的人行横道设计用于容纳通往桥梁和森林保护小径的通道,从住宅区的轨道东侧, Lake Forest Academy, and Townline Community Park located on the west side.

广泛的第一阶段利益相关者协调包括几个IDOT局,包括水力学, Traffic, and Geometrics.  因为小路连接包括一座桥在铁路轨道上, 第一及第二阶段的十大赌博平台排行榜均须与metroa密切配合.


Blending the New with the Historic

土木技术公司的结构工程师设计了一个新的221英尺长的桥梁结构,作为铁路连接的最后一环. The new 12-foot wide, 钢架和木板桥被放置在与原有桥相同的位置,用于维修J. 奥格登装甲庄园,设计位于现有的混凝土桥台内.  结构工程师选择利用旧桥的混凝土桥台来保存历史美学,并参考以前的桥和庄园. 现有的桥台只作装饰用途,而新桥的基础结构则隐藏在桥台后面. 新桥梁设计的一个挑战是对现有桥台的尺寸和结构支持进行关键的验证.  Also, 为了运输到现场,这座桥必须被设计成五个独立的部分, with the ability to assemble the single structure in the field.


Anticipation, Coffee, and a 2 a.m. Hoist

步道和新桥的建设是分阶段进行的,这样铁路两侧的步道就完成了.  Then, in the early hours of the morning on Saturday, September 9th, 2018, before an audience of about 40 on-lookers, and with adrenaline, anticipation, coffee, and donuts holding tiredness at bay, 民用技术公司的常驻工程师协调了新桥梁结构的布置, 是新米德尔福克草原步道连接的中心和最后一环. The hearty crowd that had gathered at 2 a.m. to watch the bridge erection included staff from Civiltech, Lake County, and the Lake County Forest Preserve District, as well as curious neighbors.

The planning, preparation, verification, 完成桥架安装所需的协调是复杂和多方面的,在吊装和放置桥架的过程中产生了巨大的预期和焦虑.   最关键的因素是与Metra的时间表的协调,这决定了3个小时的窗口, between 2 am and 5 am, in which the entire bridge installation needed to occur. 在这紧张的时间框架内进一步增加了复杂性和协调性, 货运列车仍被允许通过,但限制了它们的停留时间.

Exceeding Owners Needs

湖区森林保护区面临着从居民区安全进入米德尔福克热带草原森林保护区和美乐蒂农场自然保护区的挑战, Lake Forest Academy, and Townline Community Park, as well as connecting regional trails, 因为铁路和IL 60号公路给行人和自行车造成了障碍.

civtech的桥梁和步道连接设计为社区提供了通往米德尔福克热带草原森林保护区和步道系统的安全通道. 这一改进为社区提供了一座最先进的桥梁和森林湖唯一的行人/自行车轨道交叉, while honoring the history of the region.

Learn more about this project
and its related services.

Contact Jim Ewers