• A three-span, steel beam bridge was removed and a 76-foot single-span pre-stressed, post-tensioned concrete box beam bridge was constructed.
• Included were custom designed railings and connecting abutments into the existing stone walls lining the river.

Services Provided:
Surveying - Hydrological and Hydraulic Analysis - Scour Analysis - Design Engineering - Structure Engineering - Planning - Construction Engineering - Construction Inspection

North Eaton Street Bridge over Kalamazoo River, Albion, MI
The bridge features a 14 ft sidewalk to accommodate a trail crossing.

• A two span, steel beam bridge was removed and a 78.5 ft. single span, pre-stressed, post tensioned concrete box beam bridge was constructed  
• During construction it was discovered that soil and groundwater had been contaminated by groundwater migration from a neighboring site.

Services Provided:
Topographical Surveying - Staking - Hydrological Analysis - Hydraulic Analysis - Scour Analysis - Design Engineering - Construction Inspection & Testing - Construction Bidding

Hayner Road Bridge Replacement, Branch
County, MI

A single-span bridge was replaced by a metal-box culvert.

• A single-span jack-arched bridge was removed and a new 28.3-feet span by 9-feet rise metal-box culvert with head and wing walls on a concrete slab full invert was constructed along with related approach work.

Services Provided:
Topographical Surveying - Staking - Hydrological Analysis - Hydraulic Analysis - Scour Analysis - Design Engineering- Construction Engineering - Construction Inspection & Testing

• An existing six foot wide by 48 foot span concrete arch section was available at cost from a vendor.
• A HEC-RAS hydraulic analysis of the creek modeling this bridge and existing Lemon Creek Road Bridge was required to obtain a MDEQ permit.
• The creek banks were contoured to transition into and out of the bridge to facilitate flow through the bridge.
• Design work included spread footings, headwalls, railings and sidewalks.
• MDNR Land and Water Conservation Fund Grant was obtained.

Services Provided:
Surveying - Hydrological and Hydraulic Analysis - Scour Analysis - Design Engineering - Structure Engineering - Planning - Construction Engineering

• A 40 ft single-span reinforced concrete bridge was removed and a single- span by 44 ft wide, pre-stressed, post-tensioned concrete boxbeam bridge was constructed.

Services Provided:
Surveying - Site Design - Design Engineering - Construction Engineering - Right-of-Way - Construction Inspection and Testing - Permitting

• A single-span steel-truss bridge and a single-span steel-beam bridge were removed and a new 50-foot-span, pre-stressed, post-tensioned, concrete box-beam bridge was constructed over the new channel.
• The channel under the truss bridge was previously abandoned when a new channel was dug, so the old channel was back-filled and compacted.
• A new 14-foot, eight-inch-span by four-foot, one-inch aluminum box culvert was constructed to replace the steel-beam bridge.
• After the structures were completed, the original gravel roadway was compacted and paved.

Services Provided:
Surveying - Site Design - Design Engineering - Construction Engineering - Right-of-Way
- Construction Inspection and Testing - Permitting

• The deck and superstructure of a 203 feet, three span , four-lane bridge were removed and reconstructed. 1995 ft of roadway with two intersections also were constructed.
• The original steel beams were replaced with concrete I beams on modified piers, and abutments with a composite concrete deck. Roadway work included complete reconstruction of drainage, curb, gutter and sidewalk replacements, median removals, and pavement markings.

Services Provided:
Surveying - Site Design - Design Engineering - Construction Engineering - Right-of-Way - Construction Inspection and Testing - Permitting

• This intermediate size dam is currently classified as a high hazard potential dam due to urban development downstream due to the large volume of water impounded behind the dam and the potential of property damage and loss of life in the event of a failure.
• The maximum storage in the Mill Pond behind the dam is about 1,320 acre feet.
• The dam is a composite earthfill structure, 14 feet tall at its highest point and 120 feet long.
• The spillway consists of a rectangular concrete drop inlet with wooden stop logs on the upstream side of the structure to control the water level. After entering the drop inlet, the flow then goes through a corrugated metal multi-plate arch pipe and over a concrete apron into Dowagiac Creek.

Services Provided:
Inspection