posted 14 years ago
Greetings all!
We recently had a driveway put in that crosses a creek on our land. The creek is only 24" wide where it went under the old bridge which was constructed of railroad ties. The ties were sinking into the creek so we had the excavator lay a section of blck corrugated ADS tile down then backfill with gravel and dirt to create a new bridge/ creek crossing. The ADS tile was the excavators recommendation and I don't think that I have an issue with the logic on using that type of tile.
The problem is that I don't believe that the creekbed was dug out when the tile was laid and so when backfilled, the end of the tile on the upstream side is about 1-2" above the water, and the water seems to be making its way to the other side of the driveway without going throught the tile. Water always finds a way, doesn't it?
So the delimma is how to correctly fix the problem and get water flowing through the tile so as to avoid the water erroding around the tile. My thought was that the tile needed to be removed and the creekbed to be dug out so that the opening of the tile is just below water level on the upstream side. Another option that I have been presented with is rasing the water level so that water is flowing into the tile. This would be accomplished by adding rock to the creekbed to raise the water level. My concern with the latter is that the water will eventually find its way back under/around the tile. But I am no expert.
Any thoughts would be greatly appreciated!
Thanks,
Mac
