Water Tank Floor Pour Time Lapse

Provo City is constructing two new water storage reservoirs with associated transmission lines to provide better water reliability for Provo residents, businesses and guests now and in the future. These new tanks are part of what will be the West Side Pressure Zone. The Main Zone currently includes about 75% of the city but has less than a third of the storage. The new West Side Zone will be separated from the Main Zone tanking the portion south and west of the railroad tracks. This will remove more than half of the area and nearly doubles the storage. The new tanks are designed to alleviate the demands on the Main Zone and reduce high pressure associated problems on the west side of Provo.

West Side Tank #1 (6 Million Gallons) is located on the east side of Columbia Ave near the intersection with 1950 N. Tank #2 (4 Million Gallons) is on the west side of Slate Canyon Drive at about 600 S. Both concrete tanks were designed as post tension AWWA D115, which requires the installation of the floor and roof slabs to be done in a monolithic procedure (no joints or seams). After pouring, tendons running through the floor from edge to edge are tightened to compress the concrete and practically eliminate cracking.

Tendons and connectors prior to floor pour


Tendons and connectors prior to floor pour


The floor pour for West Side Tank #2 was done on June 16 starting at 4am and continued until a little after 1pm. The pour started early to keep the concrete from curing too fast in the heat of the day. Check out the time lapse video below to see the floor pour progress.


The contractor then covered the floor with water to allow it to cure slowly over the next week to achieve maximum strength.

Water Cure


The first section of the wall was formed and poured on July 12, and the next two sections are being formed now and will be poured this week. Tank #2 is expected to be complete by the end of 2016.

Progress to July 19, 2016


Progress to July 19, 2016


Work on Tank #1 is starting up again now that the pad has had a chance to settle and achieve maximum compaction. This tank will be substantially complete around the end of April, and we will start putting water in both tanks at that time to transition to the new West Side Zone before the peak demands hit in July and August. Work on the site will continue for another couple months to complete the work including grading and landscaping.

Pressures should go up a little during peak demand times in the Main Zone since we are not trying to shove as much water through each pipe. The tanks will help all areas, the new high school included, with better reliability and flexibility in the system and reduce the current storage deficit that we have. We still need some more storage, but this is a great boost since it increases overall storage by 1/3.

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  1. I’ve always been curious about water storage. I think it’s so interesting that they lit the water sit for so long to cure so it would be at maximum durability! It makes sense that they would want it to be so strong, especially when it’s storing something as important as water.

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