Ahwahnee Hotel, Replace Steam Line to Dorm

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The purpose of this project is to replace the existing steam line from The Ahwahnee Hotel to the Ahwahnee Dorm for consistent and cost effective heating, for energy efficient operations, and to eliminate conflicts with the hotel chiller. Steam from the hotel is piped from the hotel to the dorm to provide for hot water and heating. Frequent steam line failures have caused excessive and costly repairs that only last two or three years. The loss of steam causes the boilers to run continuously causing excessive use of fuel and energy. Since the ruptured steam line runs under the chiller building, it causes it to stay heated, which defeats the purpose of the chiller. This constant heat is also damaging the controls to the chiller, which is causing additional operation problems and maintenance costs. Further, the steam from ruptured pipes is damaging trees, shrubs, and grasses in the pathway of the line. In 2005, an engineering firm investigated and developed a plan to install a new line alongside the existing. The plan will allow the replacement in the same location with little or no additional disturbance, thereby minimizing resource impact.

The satellite staging area will be located in the employee parking area. Up to three spaces will be impacted. Material storage will be located in the designated area located north of the cottages (nearby horse training area).

Basic scope of work is to hire a mechinical contracting firm to provide design build services including revised plans based on NPS stipulations and project revisions.

1. Shut off existing steam line;
2. Remove existing steam line in its entirety;
3. Re-grade existing trench with new bedding material (4'W X 4'D);
4. Install new insulated steam line and insulated condensate return line in same trench as existing; use direct push to install line under chiller building;
5. Backfill and compact over new lines;
6. Miscellaneous cut and patching, valves, and other appurtenances associated with the piping will also be included;
7. Archeological monitoring will be performed during all excavation operations.