Thread by @shayshinecastle

Alright, quick update on the flood mitigation work at CU South, including a very depressing timeline of where we are in the process. Depressing bc we've been doing this for so. long. and there's still a long way to go.

See for yourself. Slide 15

documents.bouldercolorado.gov/WebLink/DocVie…

This is the first check-in with this council.

Council's not doing or deciding anything tonight, or even this year, as Utilities' Joe Tadeucci says. The next thing they'll vote on is disposal of open space land in early to mid-2023.

We're still in the Preliminary Design phase, which will wrap this year. Pretty sure we've been here since 2018... although maybe only since 2020 when we settled on a design.

What does that include?
1.) Groundwater Modeling – development of a baseline groundwater model and analysis of a proposed groundwater system.

2.) Hydraulic Modeling – development of an updated floodplain model and design of the earthen embankment dam and concrete spillway and excavation area.

3.) Civil Design Layout – provide grading layout and sizing for the embankment dam, spillway, outlet works, groundwater conveyance system, and other project components.

4.) Geotechnical Investigations – characterize the soils, groundwater, and bedrock conditions in the project area for borrow sources, groundwater design and excavation conditions.

5.) Environmental Permitting – submit initial permit documents, including federal permits: waters of the US and threatened and endangered species.

Idk that you need to know that, but it's nice to explain what the city is up to.

South Boulder Creek is 17 miles long and has seriously flooded 3 times - 1938, 1069 and 2013. Its 36-square-mile watershed is the second-largest in Boulder, behind Boulder Creek

Boulder, of course, has huge flood risk, as we have 16 major drainageways here.

That's why we're doing this project, Brandon Coleman says: It's all about life safety.

@threadreaderapp please unroll. Thanks!