Tailwater is defined as the depth of flow in a channel immediately downstream of a drainage facility. Since a drainage structure can create a constriction, the tailwater is usually a starting point, from which the resulting headwater is calculated. Early in my career I was confused by this, because it would seem that building a […]
How to Calculate Runoff
October 1, 2013 by Leave a Comment
Calculating the design flow, or runoff, is usually one of the most difficult parts of an engineering project. We’ve come a long way towards defining some of the abstractions, but unfortunately it is still an inexact science. There are three primary methods to calculating a design flow (and one additional important consideration): Rational Method SCS […]
The Work Energy Principle Explained
September 30, 2013 by Leave a Comment
Since energy can be neither created nor destroyed, external work performed on a system changes the system’s total energy. $latex W = {\Delta}E = E_2 – E_1$ The work energy principle introduces some simplifications into many mechanical problems, such as: You don’t need to know the acceleration of a body to calculate the work performed […]
All About Asphalt Aggregates
September 25, 2013 by Leave a Comment
Aggregates comprise about 90 – 95% by weight and 75 – 85% by volume of the average asphalt mix. The properties of the final asphalt product are greatly affected by the grading of the aggregate. Coarse Aggregate is material retained on the #8 sieve (2.36 mm and larger). Fine Aggregate is material passing through the […]
What are the types of Portland Cement?
September 24, 2013 by Leave a Comment
Portland cement is the primary ingredient in concrete. It is produced by burning a mixture of lime and clay in a rotary kiln and grinding the resulting mass. ASTM C-150 describes 5 classifications of portland cement Type 1: Normal portland cement Type 2: Modified portland cement Type 3: High-early strength portland cement Type 4: Low-heat […]
How to Determine USCS Soil Classification
September 23, 2013 by Leave a Comment
The Unified Soil Classification System is a method of categorizing soils for use in engineering and geological applications. Soils are classified in USCS groups that are designated by a group symbol and a corresponding group name. The governing standard is ASTM D2487. Classification Groups The following are the soil classifications: Symbol Description GW Well graded, […]
Alberta Transportation pre-qualification
July 26, 2013 by Leave a Comment
This morning I was informed by Allan Donovan of Alberta Transportation’s Professional Services section that Roseke Engineering has achieved pre-qualification for the category of “Design of Standard Bridges and Culvert Structures.” This is a milestone we at Roseke Engineering were striving for and we are very excited about it. This is a “pre-qualification” for Alberta […]
Southern Alberta flooding
June 21, 2013 by Leave a Comment
Due to heavy rains in southern Alberta, many rivers are high and over 100,000 people have been ordered to evacuate. The bulk of the news coverage is around Canmore and Calgary, but all of southern Alberta, particularly the southwestern part, is affected. Here are some photos from the Nanton News: Advisories Here are some links […]
We are COR Certified!
February 12, 2013 by Leave a Comment
Great news! Roseke Engineering has received its Cerficate of Recognition (COR) from the Alberta Construction Safety Association (ACSA). The Certificate of Recognition is the highest level of safety certification a company can achieve with the ACSA. It demonstrates an ongoing commitment to safety in all areas of the business. Firms must submit to annual safety […]
Welcome to the New Website
February 8, 2013 by Leave a Comment
Welcome to the new Roseke Engineering website. Definitely have a look around and if you have any questions, drop me a line at bernie.roseke@roseke.com. I’m excited about the work that we are doing and will be doing in the future. We came flying out of the gate in 2011 and I can now safely say […]