APWA Goes Social

Many established professional organizations and associations are still trying to figure out social media or worse, have not yet even heard about it. Which can be frustrating for members because social media provides a great way for members to network. And networking is one of the main reasons people join associations. However, members of APWA will find that their organization not only understands social media, but is well on its way to using it for membership engagement and interactions.

Earlier this year, APWA launched a Ning-based network: We Are Public WorksWe Are Public Works Screenshot This network offers not only members, but anyone interested in public works, a place to discuss common issues, share photos and videos, and announce events. Launched earlier this year, the site already has over 700 members.

In addition to the network, APWA has a Twitter account for the APWA Reporter. This account regularly Tweets information from the organization’s publication. The Arizona Chapter has also established an account at http://twitter.com/APWAArizona. Other Twitter accounts related to APWA are: APWASnow and APWACongress

For those of us on Facebook, APWA has set up a Facebook page.

Lean budgets have reduced networking and education opportunities for many of us working in public works. By taking advantage of APWA’s social networks, we can stay connected and find ready access to resources.

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Trench Backfill: Is it best to compact, jet, fill, or dump?

In construction, there are many methods to accomplish the same result. The main requirement is that the work is done according to the specification written for that particular project. When it comes to trench backfill, the specification usually allows the contractors several choices for filling the area over the pipe and under the pavement. But those of us working in the field long enough have probably come to prefer one over the other. After watching trench performance for about 20 years, I have come to prefer sand backfill compacted by some mechanical means.

Compact
The sand/compact method I prefer is described best in the Standard Specifications for Road and Bridge Construction in Illinois. This spec allows for material meeting the following requirements: a wet, coarse aggregate gradation such as CA 6, CA 10, and CA 18 or a moist, fine aggregate gradation such as FA 1, FA 2, FA 6, or FA 21. This material is then compacted using some mechanical means such as a compactor on an excavator or a "jumping jack" type compactor. My experience has been that, if properly compacted, the pavement over the trench has minimal chance for failure. The video below shows a person compacting around a pipe with a jumping jack.

 

 

Jet
In my earlier days, I inspected projects designed by other engineers. Some allowed what is known in our industry as "water jetting." This practice allows the backfill of the trench with specific material but no compaction. Instead the contractor returns to the trench at a later date and forces pressurized water into the trench using a long, metal device. On the projects this method was allowed, I noticed that within a couple years, the area of pavement over the trench would "dip" or fall creating a depression in the roadway.

My thoughts on water jetting are that it might work in the right soil conditions such as in sand or in a highly fissured bedrock. But most of my projects have involved the installation of pipe in heavy clay. Not necessarily the best soil type for conveying water out of a trench. So I envision the water introduced by jetting as filling a bathtub. Only after a few years does the water dissipate, reducing the volume of the trench, and causing a pavement failure. This is why I do not allow this method on my projects.

Fill
Another material used to backfill the trench is referred to as flowable fill. This is a cementious material with a low water/cement ratio that is delivered to the jobsite by a ready-mix truck. The material flows straight from the truck chute into the trench.

In my experience, flowable fill has performed well. The primary tip to remember, if choosing this method, is to make sure the pipe is covered first with an aggregate material. Allowing flowable fill to engulf the pipe can create problems for those needing to hand dig around the pipe in the future. The other challenge with using flowable fill is that the material does flow. So the contractor needs to block off sections of the excavation each day to allow the material to fully fill the excavated trench and remain out of the area left unexcavated for the next day. The contractor also needs to plan his backfill operations so they are synchronized with the delivery of the flowable fill.

Dump
The last method is one I have just started seeing used by contractors within the last five years. This involves the dumping of an open graded coarse aggregate such as CA7 or CA11 in the trench with no method of compaction. While I have seen a few specifications written by consulting engineers allowing this practice, I have not seen a government agency with this specification although there could be some out there. My concerns with this method have been that the open graded backfill has voids into which fine material from the soil can migrate. Of course this would happen over time and instead of the area over the trench failing, the area just outside the trench would fail due to a loss of material. And I have seen this failure occur on a privately funded project. However, I have talked with other engineers who have not witnessed any failures. I would agree that lining the trench with a fabric would allow this method to work. 

Contractors seem to prefer this "dump" method because it requires no mechanical compaction and therefore eliminates the time spent compacting the trench. Their argument is that the stone compacts itself, and the trench will not fail. While I would still think the stone needs some compaction, I would agree that I have not seen trenches backfilled in this manner failing. Instead it is the area just outside that fails.

While I have, as an engineer, made my decision on the methods I feel comfortable specifying, I realize others have chosen to spec some of the others. I would be very interested in hearing the choices made by others, the reasons behind the choice, and their experiences. Feel free to leave a comment or take the quick poll on our main Website page!

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Selling off Assets: A Road to Failure?

Today I read an article on Reuters indicating voters are increasingly supportive of government leasing infrastructure assets. I cannot imagine how anyone who truly understands infrastructure and government can come away with a blanket statement supporting privatization of government assets.Highway
From reading the story, I can only think that these voters are making this decision after politicians have given them little background information and the choice of selling/leasing or paying more taxes. Of course most voters presented with only that information would choose to privatize.

But let’s look at what really happens in many cases when government decides to privatize:

Why do those in charge of our assets even consider something like this?

  • Those in charge decide they need cash, and fast, without raising taxes. So they start looking around at what they can sell.
  • Those in charge are approached by a private entity with a privatization proposal.
  • The government entity might lose key workers responsible for the operation and maintenance of a facility and not want to bother looking around for new employees.
  • Those in charge are trying to cut costs and start looking at dumping assets that require large expenditures.

Often these deals are set up with all the best of intentions. Government leaders are truly trying to cut costs and save money; private companies are just trying to make a living and see a revenue stream that allows them to offer a service.

So why is privatization so risky for government?

First of all, because what is being sold is usually vital to the health, safety, and/or welfare of the community. Let’s just look at two examples of assets that are owned and maintained by government.

Roadways
Major thoroughfares in our country were initially built for the purpose of helping the U.S. in times of war to allow for fast movement of troops and equipment across our country. They also allow for fast movement of goods and services across our country and as such have now become vital to the economic well-being of our country.

Water and Wastewater Operations
In the late 1800s and early 1900s our country lost thousands due to outbreaks of disease and sickness – much of it linked to poor sanitation and contaminated drinking water supplies. People today are so used to having safe drinking water and effective elimination of wastes that they might take all this for granted. But all of this is only possible because of strict regulations by the EPA, trained professionals who provide treatment and maintenance of our water and wastewater facilities, and continued investment in the systems by our politicians.

So let’s consider some of the risks that can occur in each of these examples if a community leases or sells government assets:

Example 1: A government entity approves a long-term lease to a private company for a major tollway that is designed with a 20 year life. After 20 years of collecting tolls, the company is now faced with a 40 million dollar road and bridge reconstruction project. If they were a well-run business, they would have banked a portion of their revenue to help fund this. The other alternative available is a bond for the project backed by future revenues.

But what if they didn’t bank this money or they do not want to or can’t afford to give up future revenues. Looking at losing millions, they decide to fold or go bankrupt? What is the government entity to do? Not fixing the asset is not an option. People depend on it; the economy depends on it. So the government is then faced with spending 40 million after not collecting tolls for all those years and having to pledge future tolls to the project. And in the end, the taxpayers have to pay anyway – they just put it off 20 years. The government must also spend money ramping up their road maintenance departments to handle the return of this asset.

And where is the money government got in the up front lease purchase? Who knows. Often these funds seem to be spent on non-infrastructure related expenditures. Many times used to shore up failed funds that were poorly managed.

Example 2 – a major tollway is sold to a private company. After about 10 years of little to no maintenance, the road starts to fail considerably or perhaps the traffic on the road increases to the point that there are increase accidents and travel times. People complain to the company, but why should the company listen to them. The road is a major corridor, and they know people will drive it. People have little to no recourse – there is no one to be voted out in this case. So people are forced to have to use a failed asset with no voice in the matter.

Example 3 - God forbid our country goes to war and fighting occurs on U.S. soil. We need to move troops and equipment across the land and provide vital services to our citizens, but the country we are at war with owns our assets: roads, water, wastewater. Even if we somehow secure these facilities, enough significant damage could have been done before this could happen. And now with many assets controlled over the Internet, who knows what damage they could do or have provided for in these facilities in case of this type of situation. Is this a paranoid outlook and extreme. Yes, but is it worth the risk? Just because some politician doesn’t want to work a little harder or better at managing the asset.

Example 4 - Now let’s look at an asset that might at first not even seem that vital to the well-being of a community: parking meters in a downtown. The community for whatever reason decides to approve a long-term lease to a single company. The company is ill-prepared to handle the resulting maintenance and user interactions. People are upset and complain to the government, but they have their money and have no further leverage to get the company to address complaints.

Because the volume of complaints to the government rise to a level that concerns politicians, the government decides to go ahead and perform the maintenance and repairs to the meters themselves using their own staff. And the company continues to collect revenues from the meters as they will for the next 50 or 100 years while the government tries to address citizen concerns. Oh, and by the way, shortly after getting the lease approved, the company raised parking meter rates considerably. And again, the government officials have no leverage to prevent this.

What happens now? In this case, the economic well-being of the community might be threatened if people decide against driving to this community and paying these fees. Local business loses out on sales; local tourism loses visitors.

(The example above might resonate somewhat with those living in Illinois.)


Example 5
- This example will only address privatization of a service – not even selling or leasing an asset, and this example is based on strictly on a real scenario that played out. A city hires a local hauler to provide solid waste pickup. The deal is the city pays the hauler a flat fee per household for pickup only. The city then pays the landfill the charge for the city’s waste that is dumped there by the hauler. This goes on for many years with the city paying both entities.

Eventually the waste hauler is bought out by another person who discovers the drivers of the garbage trucks have been telling the landfill that all the garbage they dump there came from this city even though the hauler picks up waste from other communities. This city ended up paying for waste from other cities to the tune of about $300,000 that could be documented. Fortunately the new owner agreed to pay it back over time. But now the city is obligated to hire this particular hauler for fear of not getting their money in the future. And even worse, the hauler will not divulge the amount of waste taken each day out of this community – there is no provision requiring him to. Nor can any citizen ask for it because FOIA rules do not cover a private entity.

I could go on and on with examples but will leave it at that since this post is already long enough!

So what is the answer? Is all privatization bad?

I realize some of these examples are worse extremes, but two of the examples relate what has already been experienced by at least two communities. Are there success stories? Yes, most definitely. But as the say, “the devil is in the details.”

So most definitely privatization can work, but not in all cases and not at all if the agreements are poorly written.

If politicians do not have an adequate business background to cut privatization deals, they need to find someone who does to ensure all the issues and potential risks are addressed. And if the risks do not outweigh the upfront payoff, privatization of the asset must not be approved. Because at the end of the day, the citizens are the ones who will be paying the tab for a failed or poorly executed deal.

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Getting Ready for Census 2010

Census 2010As a genealogist I have found the census to be invaluable to my research; but even more important has been its impact on the economic development of my community. And here is the reason why, taken directly from the Census Bureau’s Website:

“Census data are used to distribute Congressional seats to states, to make decisions about what community services to provide, and to distribute $300 billion in federal funds to local, state and tribal governments each year.”

So, the census numbers can determine services provided by a community and can affect the amount of funding a community receives for improvements and programs. The census can also affect what regulations and laws the community is obligated to follow. Smaller communities usually have less restrictions and lighter regulations than large communities.

Because the census is so important to the country, the Census Bureau is trying to get the word out. If you want to help distribute informational materials at your own agency, you can find them at the Census Bureau Website.

The Public Works Group is doing its part by hosting a Census 2010 educational site on Public Works Island in Second Life. Visitors to the site can see photos from the Census Bureau, watch a movie about the census, access census-related job information, and find links to related Websites. Eventually, I will have Census T-shirts available too.

If you have a Second Life account, you can visit by clicking the following SLURL:
http://slurl.com/secondlife/Public%20Works/165/238/51

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Getting Calls about Rats?

Rats - Credit: NIHI think most of us working in public works have at one time or another gotten the “rat call.” In our city, we had one person who called annually about “rats coming out of the sewer.” We would call the exterminator, and the problem would appear to be solved for that year. Of course, we never got calls from other residents, and I always wondered if the rats came to this particular home because this person placed food out on a picnic table each day for the local wildlife. I even stopped by one day after getting a call to check something else out at this address, and a squirrel followed me into this person’s home.

Anyway, when we get calls like this it is nice to have a little background knowledge. So today, when I saw a study funded by the National Science Foundation, I thought I better call some attention to it. Working in this field, you never know when this type of information might come in handy.

You can view the report by clicking the title below:
City Rats Loyal to Their ‘Hoods, Scientists Discover

And if you have any rat stories of your own, feel free to share them in the comments.

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A Failure in the Making

Today I read a story about a massive hole in the road in a community in New York that has not been repaired for a month. Even though at first glance this might seem an excessive amount of time to neglect repairing a hole in the road, I can certainly understand the delay after reading the entire story. It seems to be a clear case of too many government agencies/bodies having jurisdiction over a common area without a clear understanding or agreement of responsibilities. Unfortunately for the public and the governments dealing with the problem (because many dealing with it are not the ones responsible for the setup), this sort of thing seems to happen too frequently all over.

In this case, it appears that the roadway with the damage is located within a village, but the actual roadway is under the county jurisdiction or control. This is a very common situation. Then the water line installed under the road appears to be owned by a city. So when the water line broke and damaged the pavement, the city was deemed responsible for the repairs. But it appears this took quite some time for everyone to figure this out.

In the last city where I worked, we had similar issues along some roadways that were located between our city and the neighboring city. In one particular area of a road, there were three jurisdictions involved: our city, the neighboring city, and the county. At one point the state even had jurisdiction in the same location. So when an accident occurred, law enforcement from each of the four agencies would have a conversation over who would respond. Most of the time, they decided based on which direction one of the cars was traveling. Can you imagine this happening with each accident prior to anyone responding or taking a report?

So how can these types of situations be improved or avoided? My first thought was always try to minimize the jurisdictions involved. We had another situation come up where a road was going to end up between two communities with again the county and the state being involved. I desperately tried to convince everyone to arrange to have only one government body responsible for the area (remembering the other location), but no one seemed to understand the benefit of doing so and allowed another poorly organized arrangement to go through.

Why? Because in the end, the county, state, or other city did not want to give up any control. But more importantly because the decision makers involved were not the ones who would be receiving the phone calls for accidents, traffic signal failures, road maintenance. They still would have jurisdiction over decisions in this area, but knew our city would be the one typically called to handle any problems.

My next thought is where these types of arrangements are unavoidable, such as in the case of utility easements, an agreement should be prepared stating everyone’s responsibilities. Better yet, place this online somewhere for everyone to see and make sure if you have turnover in your department, these agreements are obvious to those taking over.

In my own frustrating case above, were any agreements drawn up to cover these issues for this area? No, so this will also be an area where the pavement falls apart and accidents occur, and the public will again wonder why government never responds in a timely manner. Never really knowing that all this could have been avoided with some planning, cooperation, and clear understanding and acceptance of responsibilities.

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