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I'm still waiting for my utility engineer to find out what kind of pipe we are dealing with.

Thanks guys. I was out of the office all day so maybe I can get some information on the pipe tomorrow. The reason I'm so concerned about this project is that it will get national attention. The DDI is unique and failure to meet the schedule or a dramatic pipe failure would not look good.

Exposer and surveying is scheduled which I guess will give us an idea of it's condition. I was too busy today to contact the city and find out exactly what the pipe was but it should be in their records. The solution I was shooting for would not be dependent on the pipe or at least that was...

It is my understanding that this line is a weak ductile iron pipe of 1960 vintage.

It's looking like at this point that if I can't find a encase inplace solution the pipe will have to be pushed. The City will not have the paper work ready in time and the work cannot be done until the cool season in the fall. Most of the highway work will be completed by then. A parallel line...

I'm not sure will have to wait until monday.

I believe I was told it was steel.

This is the email reply I got from the cities consultant. "What are the soil conditions? Knowing the soil bearing capacity will help the discussion. What is the normal operating pressure of the water transmission main? I checked w/ the City, operating range is 155 psi to 180 psi (1,070 kpa...

I'm going to try and get the cities consultant to post. It may help to get his perspective. I'll check back in the morning to see what great ideas you come up with.

The project is scheduled to be let in February but the pipe work must be done during the cool season after most of the roadway will be completed. I'm getting desperate here folks please ask anyone you know if a cast in place solution is feasable. An example locatiom would be nice if I meet...

I'm told it is a 20" high presure main. The cost was estimated based on $600 a foot for a pushed pipe. The additional cost comes from trust blocks and addition relocation to make the connections above and below the encased section. I still believe that a concrete encasement over a steel arch...

Your idea is what I first suggested but the objection was raised that the material under the pipe would erode if only three sides were encased.

The length of the encasement would be 800ft. The cost for relocation would be $700,000 to a $1,000,000. The DDI is estimated to cost $7,000,000, it replaced the previous alternative, a conventional diamond with 10 lanes costing about $11,000,000. More than half the cost for each alternative...

In this case we are encasing the pipe to protect the highway in the event that the pipe ruptures. It is also important that the pipe can be easily jacked through the encasement in the event of a failure. The cost of relocation is prohibitive and is the responsibility of the local government...

I'm thinking that a water main can be encased in place with a am aluminum or steel plate jacked under it, a metal pipe arch placed over it, and concrete to hold it all in place. Basically I have a main that cannot be taken out of service while a highway is built over it. The cost of a...

http://www.aashtoware.org/?siteid=28&pageid=76 http://www.tfhrc.gov/pavement/ltpp/rigid.htm http://www.asphaltalliance.com/upload/Pavement%20Type%20Selection%20Processes.pdf

If the original base was designed to drain then the new adjacant pavement base should drain.

Thank You

Jim do you have details for anchoring the barrier and what type barrier. We just upgraded from the old cable joints to a pinned joint.

Why the shy distance may be about 2' the barrier will effect capacity up to 6' of clearance. I have always used Barrier which shipped with the roadside package to calculate crash rates. You will have to get the accident cost data for you institution it varies substatially from area to area. In...