Buried heat tape with insulation to prevent freezing?

I have a situation where the main water line coming to my house goes through a bridge so it cannot be buried deep enough to prevent freezing. Water company suggested heat tape but most heat tape is restricted to 100-150m and the pipe length is 185m (around 600ft) Will it be enough to only put heat tape in the critical area?

I have the feeling where it’s not worth it if i cannot put heat tape for the whole length of the pipe even if the pipes are buried (word around here is that 60-80cm ~2ft deep should be enough)

I also don’t feel comfortable burying such a complicated system, it sounds prone to fail.

Any tips or experiences will be appreciated.

Thank you 🙏🏼

(I added a drawing, it is in french but should be clear enough: red line is heated pipe, blue line is insulated but not heated pipe with heating tape and black line is an electrical wire to power the heated piped)

I have a situation where the main water line coming to my house goes through a bridge so it cannot be buried deep enough to prevent freezing. Water company suggested heat tape but most heat tape is restricted to 100-150m and the pipe length is 185m (around 600ft) Will it be enough to only put heat tape in the critical area?

I have the feeling where it’s not worth it if i cannot put heat tape for the whole length of the pipe even if the pipes are buried (word around here is that 60-80cm ~2ft deep should be enough)

I also don’t feel comfortable burying such a complicated system, it sounds prone to fail.

Any tips or experiences will be appreciated.

Thank you 🙏🏼

(I added a drawing, it is in french but should be clear enough: red line is heated pipe, blue line is insulated but not heated pipe with heating tape and black line is an electrical wire to power the heated piped)