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Fast Facts
Environmental Creek Assessments
Photo Gallery |
| Fast Facts |
| Population |
2000: 13,976
2030: 24,742 |
| Creek Length |
7 miles |
| Drainage Area |
4 square
miles |
| Drains To |
Colorado
River below Town Lake through Boggy Creek |
| Well Known Sites |
Morris Williams
Golf Course, Bartholomew Park, Highland Mall, Robert Mueller
Airport |
| Land Use |
Residential
Business
Civic
Parks
Roadways
Undeveloped |
23%
17%
3%
11%
38%
10% |
Watershed Facts
- Like the larger Boggy Creek, Tannehill Branch
has had serious flooding and erosion problems.
- In response to citizen complaints, investigators
find an average of 37 pollution problems each year in Tannehill
Branch. Sewage is the most common problem, followed by petroleum
then trash.
- Elevated nutrient and bacteria levels in
2000*(2001 Water Watchdogs EII Phase 1 Watersheds Report (monitoring
conducted in 2000)
- Trash and debris are a consistent problem
- The monitoring site at Highland Mall has
the worst water quality in the creek; but water quality improves
further downstream*.(2001 Water Watchdogs EII Phase 1 Watersheds
Report (monitoring conducted in 2000)
- Tannehill maintains more baseflow than other
streams in the transitional zone from the Edwards Plateau to
the Blackland Prairie ecoregions.
- Restoring
Tannehill Creek
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| Creek
Assessments
Environmental
| Index |
Score |
Category |
Notes |
| Overall
Score |
62
|
Fair
|
Tannehill Branch ranks
24 out of 46 watersheds in overall quality |
Water
Chemistry |
65 |
Good |
Water quality is above
average |
Sediment
Quality |
75
|
Good |
PAHs are high, herbicides/pesticides
are very low, metals are very low |
| Recreation |
76 |
Very
Good |
During dry weather conditions,
bacteria is not a threat |
| Aesthetics |
65 |
Good |
Litter is very bad, no
odor, some of the creek bed is dry |
| Habitat |
50 |
Marginal |
Increased sediment deposition,
major channel alteration, bank stability is marginal, bank
vegetation is marginal, buffer zone is small |
| Aquatic
Life |
39 |
Marginal
|
Benthic macroinvertebrate
community is poor; diatom community is marginal |
- Austin Clean Water Program is working on
rehabilitation of wastewater lines that may be the cause of
phosphorous and odor.
- Channel restoration and erosion control project
in Bartholomew Park may benefit watershed habitat.
- Robert Mueller Airport Redevelopment may
impact water quality and hydrology.
- Water quality scores improved in Tannehill
more than other watersheds in the City.
Learn
More
How to Help
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| Photo Gallery |
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| Tannehill Creek at Bartholomew
Park |
Tannehill Creek upstream
of Boggy Creek |
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Tannehill Creek at Desirable Drive |
Tannehill Creek ay Lovell Drive |
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