Gas Line Study at Fort Leavenworth, KS
The study provides computerized modeling of the existing natural gas distribution system using the Gas Piping software package from KYPipe program. The study also provides modeling of three alternate situations, one which provides a back loop tie-in for the north disciplinary barracks area with a new 4-inch main, one which establishes a new city gate station and a 12-inch feeder main from the Southern Star pipeline, and one which reduces the existing peak 70 psig distribution pressure to 60 psig. The output from the KYPipe modeling software is provided in the tabular form for the existing, base situation as well as the three alternate situations in Appendix C through F. A portion of the modeling program results are presented graphically in the form of fifty-nine site plan drawings at a scale of, when plotted in a full size 30” by 42” format, 1-inch equals 50 feet. An overall site plan is also provided that indicates where existing main pressure regulators are located and the pressure reduction that occurs at each one. A total of six (6) recommendations for modifications to the existing system are included at this time and the estimated cost for construction is included.
The written narrative describes the existing natural gas system distribution system and the parameters used to evaluate the system. The narrative also describes the alternate situations, the new feeder main and odorizing station, etc., and the impact each has on the overall gas distribution system performance. The written narrative also identifies those portions of the distribution system where the gas velocities and pressure drops are too high and presents solutions for dealing with each case. Main gas regulators to be replaced are identified and the requirements for the new regulators are provided. The study then provides the estimated cost of construction for each recommendation using the most recent version of MII(MCACES 2nd Generation). The existing main gas pressure regulator stations are judged using the U. S. Army Corps of Engineers’ nine-point rating scale and condition is then used to determine which should be replaced. As Alternate No. 3 provides an alternative feeder main for the distribution system, a new odorizing station will be required. The study defines the recommended odorant blend to be used, as defined in the American Gas Association’s Odorization Manual, Revised December 2000
Role: Civil Engineering