Manhole Risers

ET Simonds manhole
Case Studies July 05, 2018
Since 2006, adjustable manhole risers have been just right for a project detail that had previously been a bit of a hassle for E.T. Simonds Construction Company in Carbondale, Ill. “We do all sorts of road-related work, and of course we do a lot of paving jobs that require the raising of manholes...
Manhole riser in Jefferson County, Ala.
Case Studies May 31, 2018
Home to Birmingham, and more than 660,000 residents, Jefferson County is Alabama’s most populous county. The sewer network the county maintains includes 3,600 miles of pipe and 80,000 manholes. That last figure represents a sizable amount of annual maintenance; though manholes themselves are...
Milwaukee road adjustable risers
Case Studies April 13, 2018
Several years ago, the city of Milwaukee was experiencing issues with their cast-iron manhole risers installed throughout the area. “They’re usually fine, but on occasion they would slip or rattle out, and that led to car damage and claims—there was definitely room for improvement,” said Milwaukee’...
St. Louis sewer district relies on manhole risers
Case Studies August 14, 2017
With a population of about 320,000, St. Louis is the 60th-largest city in the United States. But due to an unusual arrangement, St. Louis, its metro area (which has a population of approximately three million), and the surrounding St. Louis County (which has a population of approximately one...
American Highway Products’ (AHP) Pivoted Turnbuckle Manhole Riser
Case Studies July 06, 2017
Fairhope is a small city, just 15,000 residents, situated on the cliffs and shoreline of Mobile Bay in Alabama’s Gulf Coast. It can seem like Fairhope is a long way from anywhere, but people seem to like it—the city has been named one of the best small towns in the South by Southern Living magazine...
Manhole risers, safety ramps help Chicago maintain streets, reduce lane closure times
Case Studies June 01, 2017
In July 2000, the Illinois Department of Transportation (IDOT) sent a letter to Scott Fier, president of American Highway Products, approving the use of his company’s adjustable riser rings when raising utility and manhole rims to grade after pavement lifts. Formal language describing acceptable...
American Highway Products (AHP) Pivoted Turnbuckle Manhole Riser
Case Studies August 03, 2016
Lower Allen Township Authority, a regional municipal sewer authority in Pennsylvania, provides service in Cumberland and York counties, west of the busy Harrisburg metro area. Superintendent David Ramsey deals with the same paving and manhole maintenance challenges as any municipal sewer system...
AHP risers boast precise custom sizes to match finished pavement grade
Case Studies June 01, 2016
Gray & Son, Inc. is a family-owned contracting firm in Maryland with roots going back to 1908. They are currently one of the biggest paving contractors serving Baltimore and the surrounding counties, and have a reputation for introducing state-of-the-art solutions that cost-effectively keep the...
A completed riser project in Grand Rapids, Mich.

A completed riser project in Grand Rapids, Mich.


AHP adjustable manhole risers can be installed by a one-man crew.

Case Studies April 14, 2016
Founded in 1916, Rieth Riley Construction is a large paving firm, serving Indiana and Michigan with 30 asphalt plants. With that kind of paving volume, and a nearly century-long history, the firm has rigorously tested hundreds of infrastructure solutions, and the tools and techniques that make the...
Construction crew member adjusting concrete final grade on a manhole riser.

Construction crew member adjusting concrete final grade on a manhole riser. 


Completed manhole riser adjustment

Case Studies April 17, 2015
State Highway 183, from Euless to Dallas/Fort Worth, Texas, underwent a major reconstruction in 2014, a project totaling $1.6 billion. On projects of this size, even small changes can lead to a great deal of extra work, and such was the case when an unexpected grade change was required to correct...
Article May 14, 2008
“My history with adjustable risers is that they’ve been very successful,” said Chuck Swan, construction engineer for Norfolk, Va. “As long as the installer cleans out the rim properly, we’ve had no problems with them.” Swan oversees the repaving of about 30 lane-miles annually, and estimates that...
Manhole cover
Case Studies
Traditionally designed manhole covers or other street castings can contribute to problems such as bumpier streets, affecting the quality of life in cities for pedestrians, cyclists and vehicle occupants. The SELFLEVEL® access assembly by EJ is an innovative solution, with easy installation,...
manhole riser
Case Studies
Chicago is the nation’s third most populated city, after New York and Los Angeles. And though it has a total of about 9,500 lane-miles, it ranks last of all major U.S. cities in terms of freeway miles per capita. This means Chicago’s paving contractors, such as Bigane Paving, are usually working on...
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