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Photo 1
All but a few of the following photos from 23 sites were taken between 5:00 pm and 6:00 pm on July 19, 2021 during a 1.85 inch rain. If noted, some were taken the following morning. All of the sites are in the Zilker neighborhood except for two in the Barton Hills neighborhood. Seven of the sites are in the Barton Springs Zone.
Back to erosion control issues on other dates.
It is unclear whether this mulch sock was moved or simply swept away by the flow because it wasn’t staked, but it allows sediment and muddy runoff to leave the site (Photo 1). Mulch socks butted up against each other instead of overlapping allows runoff and mud to escape between them (Photo 2). This site has been and is going to be a constant problem because the silt fences do not have j-hooks as required by the criteria. In a photo from the next morning (Photo 3), you can see the sediment that is remaining in the street after the builder left and replaced the mulch sock (closing the barn door after the cow has left).
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This builder almost never replaces the mulch sock across the driveway when they leave, and the results are apparent.
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Although the triangular dike overlaps the silt fence j-hooks, it is sitting over uneven ground allowing muddy runoff to exit below it (Photo 1). A mulch sock would be more appropriate here. The mulch socks along Folts do not provide any control when they are sitting out in the gutter (Photo 2 & Photo 3). The water flow simply floats them away.
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This site has been a continuing problem because of the slope but in this case they simply haven’t provided controls along the right side of the driveway and at the bottom (Photo 1). Additionally, muddy runoff is being channeled down the fence line, and without controls, it exits onto the neighbor’s driveway and down to the street (Photo 2).
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This site flows to Barton Creek below Barton Springs Pool.
From the next morning, you can see the evidence of sediment having left the site (Photo 1). This site continues to be a problem because of the slope with virtually no j-hooks up the slope and not providing multiple controls laterally across the slope as required by the criteria.
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This site is a problem because of the slope. One can see the small erosion channels cut into the soil bank on the right side of the driveway. The open-ended triangular dike does not control the runoff because runoff simply flows under it where it sits on the curb or exits around the left end of the triangular dike. This site needs a silt fence running up the slope on both sides of the driveway and multiple controls laterally across the slope. Otherwise, this is going to be a constant problem like 809 Azie Morton.
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This site is also a problem because of the slope and the now-flattened mulch socks. The mulch socks do not control the runoff because the runoff simply flows over the mulch sock or exits around the left end of the mulch sock. This site needs a silt fence running up the slope on both sides of the entrance and multiple controls laterally across the slope. Otherwise, this is going to be a constant problem like 809 Azie Morton.
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This site is at the corner of Montclaire and Rae Dell and has been an ongoing problem and will be until it is fixed. Muddy water is pouring off of the site which is in the Barton Springs Zone. Muddy runoff is flowing around the left end of the mulch sock. The mulch socks need to be installed so they don’t allow flow around the ends. The left end of the mulch sock should overlap the left silt fence, not butt up against it. The mulch socks should be slightly angled diagonally down the driveway and overlap the silt fence on the right side of the driveway. This should direct the flow behind the silt fence where it would be contained.
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These mulch socks are not staked or secured so the water floats them out of position, and they are no longer offering any control. The runoff is just channeled into the gutter.
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In photos taken the next morning, the sediment is visible in the street at the site (Photo 2) and at a number of locations downstream of the site (Photo 3, Photo 4, and Photo 5). If the builder is not going to be required to control the runoff, they should at least be required to clean up the sediment all the way down to Rundell.
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This is in the Barton Hills neighborhood. It is a continuing problem site. The photo is pretty self-explanatory. Open piles of sand need to be covered regardless of the perimeter controls. These perimeter controls are obviously inadequate.
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This site is in the Barton Hills neighborhood. The crushed silt fence and the mulch sock simply funnel runoff to the opening. The j-hook needs to run all the way up the driveway.
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There is muddy runoff leaving this site which has no controls. This could not be considered final landscaping meeting the code.
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This site has been reported several times. The triangular dikes are only part way across the driveway do not prevent runoff. Runoff just runs around the end.
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It is not clear what the purpose of the mulch sock in the street is. The runoff quickly fills up in the driveway excavation and leaves the site down the gutter. These excavated driveways being prepared for paving need to be covered with plastic or somehow prevented from contributing to the sediment leaving the site. These driveway excavations are especially problematic because they usually have a lot of loose, uncompacted dirt which contributes to a higher sediment load. The silt fence should run all the way up the driveway.
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Uncontrolled runoff leaves this site. This site has no controls.
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Runoff from the site simply goes around the right end of this lonely mulch sock. A single mulch sock that does not extend across the entire driveway and does not have j-hooks is pretty much ornamental and non-functional.
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No controls across drive allows sediment to leave site (Photo 1) and be swept away or deposited in the gutter (Photo 2).
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Like other individual controls that do not connect to anything, this triangular dike is ornamental and non-functional, allowing any runoff that it might intercept to simply flow around the ends (Photo 1). Further down the block is sediment in the street, most likely from this site or at least part of it (Photo 2).
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Although not as sloping as some sites, this site still has enough slope to create problems. Sediment is still leaving the site even though there are two sets of mulch socks (Photo 1). The problem may be that the upper mulch sock does not overlap the mulch sock on the right, and it looks like it only butts up to the silt fence on the left allowing sediment to escape around the ends. If the builder is not going to be able to control sediment leaving the site, they should at least be required to clean up the released sediment all the way down the block to Dywer and part way down Dywer. See the photos from the next morning of the sediment that was deposited along Oxford from this site (Photo 2, Photo 3, Photo 4, Photo 5).
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From the next morning, these flattened mulch socks were likely not very effective in containing the muddy runoff.
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No controls except the rolled up silt fence to the far left.
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No perimeter controls at all.
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Construction is occurring in the back corner of this lot. From the next morning, there appears to be a pretty defined conduit for runoff without any controls (Photo 1). There was a fair amount of sediment in the street (Photo 2), but it could also have come from 2104 Ann Arbor.
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