What is a Limiting Zone?

What is a Limiting Zone?

Stormwater infiltration testing is required for projects that require stormwater management. In most cases, the infiltration rate computed by these tests are fine, but in some cases, testing doesn’t work due to limiting zones. A limiting zone is defined as the upper limit of any zone or soil layer that is expected to limit the soil’s ability to treat the wastewater. More or less, it means that water cannot infiltrate the ground in this area. Some forms of limiting zones are high water tables, shallow bedrock, and redoximorphic features in soils. High water table and shallow bedrock are pretty much straightforward. You dig down and hit solid rock, there’s your limiting zone. You dig down and the hole begins to fill up with water, there’s your limiting zone.

But what are redoximorphic features? These features can form when the soil is saturated to the point that most all pores are filled with water and there is an absence of oxygen, or when changes to the chemical processes in the soil occur. When the hole is dug for the test, an examination of the soil is necessary to determine if these features occur. A way to determine this is if the soil has a reddish color to it. This shows that the section of soils has a potential to contain groundwater at certain times of the year.

If these features are encountered during the time of testing, a new location must be chosen, or the infiltration system bottom must be set at a minimum of two feet above the limiting zone.  Contact D.L. Howell & Associates, Inc. for all your infiltration testing needs.

Cost of College

Cost of College

The increase in college tuition has been on a consistent rise over the last several years. In fall of 2016, it was determined that tuition costs have reached a record high. For an in-state student to attend a public university, the total costs have gone up more than 2% compared to 2015. One of the reasons for this is because the financial aid and education tax breaks stayed flat. If we compare public tuition costs from 10 years ago and now, the average cost has more than quintupled! Private colleges have seen an average increase in tuition of more than 3%, with some of this increasing by more than 5%.

Of course, we can expect tuition to increase with inflation, but out of the last 35 years, tuition rates have risen faster than inflation. If the tuition rates continue to rise at this steady percentage, in 20 years, a private school could cost close to $120,000 a year and public $54,000.

Most Pennsylvania private colleges that offer four-year bachelor’s degree in civil engineering cost almost $60,000 per year and pu\blic schools cost anywhere from $28,000 to $31,000. Upcoming high school graduates will have to seriously consider if college is actually worth the debt that will be accrued. As cost continues to climb, we may begin to see a rise in university alternatives, such as community college or trade school.

Smoothie King West Chester Opening Weekend is Just Around the Corner.

Smoothie King West Chester Opening Weekend is Just Around the Corner.

Smoothie King is close to completion! Construction is well under way and opening weekend is just around the corner. The weekend of July 22nd and 23rd customers will be able to purchase their delicious and healthy smoothies. Located at 1011 West Chester Pike in West Chester, the site replaced an existing building and parking lot with an 850-square foot smoothie shop to satisfy all your smoothie cravings, especially during these hot summer days.

Access to the Smoothie King will be from Rose Lane, and the store will feature a drive-thru for smoothie drinking convenience. D.L. Howell proudly provided land development plans for the project including but not limited to grading, erosion, and sedimentation control design, and stormwater management design. Be sure to stop by and check them out!

Smoothie King West Chester PA

Smoothie King West Chester PA

Oh, Dam. Oroville Dam Uses its Emergency Spillway

Oh, Dam. Oroville Dam Uses its Emergency Spillway

Usually, when one thinks about California, they think of nice beaches, laid back attitudes, and droughts. Lately, there has been a lot of news about flooding conditions and problems with the Oroville Dam. The Oroville Dam is in Northern California and construction of the tallest earthen dam in the United States was completed in 1968. After a significant amount of rain during the first week of February, a crater began to form in the dam’s spillway. The workers reduced the amount of water that was to flow through the designed spillway to not create any more damage to it. This affected the dam significantly since the inflow to the above reservoir was greater than the outflow of the main spillway. This caused the dam to use its emergency spillway for the first time.

Since the emergency spillway was not designed to handle heavy flows from the dam, workers feared it too would fail just like the main spillway. Use of the emergency spillway caused severe erosion damage, and if it were to fail it would allow billions of gallons of water to flow quickly out of the dam and destroy everything in its path. Once the threat of this was possible, officials evacuated 188,000 people that were located in the floodplain. Most recently, the dam’s main spillway was inspected and was determined it can still handle large flows of water. The main spillway was reopened and allowed the workers to release more water quickly, so the emergency spillway was no longer needed. People were allowed to return to their homes and repair has begun on the emergency spillway to correct all the erosion problems.

Smoothie King Comes to West Chester

Smoothie King Comes to West Chester

​D.L. Howell was contracted to prepare Land Development Plans and stormwater management design for the construction of a new Smoothie King located in West Goshen Township. The new Smoothie King will be located at 1011 West Chester Pike, West Chester. This project is a redevelopment of the site and involved the demolition of an existing building that once was a hair salon. The construction will consist of a new 850 square foot building that will have a drive-thru and also an indoor walk up counter to order smoothies. There will be six parking spaces and one handicapped space for customers to park. Also, an underground infiltration bed was designed to capture runoff from the proposed development. D.L. Howell worked closely with Smooth Operators, L.L.C to complete the plans and get approval from West Goshen Township. Smoothie King will be operational within the near future so go and enjoy a nice healthy smoothie!