Stormwater and flood management utility funds come from user charges (a dedicated enterprise fund)
70-80% of revenue from monthly utility bills
Allows bonds (debt) to be issued to pay for big projects
South Boulder Creek (Phase 1) $66-$99M (that's the big one we talk about all the time as CU South)
Upper Goose Creek: $24M
Gregory Canyon Creek: $10M
Fourmile Canyon Creek at 19th Street: $10M
Four-mile flood mitigation / Broadway culvert: $3M
Bluebell Canyon Creek & King’s Gulch: $1M
Wonderland Creek stormwater improvements: $1M
13% of the city is in 100-yr floodplain, and 2,000 structures
Boulder Creek flooded 1914, 1929
South Boulder Creek flood 1938, 1969
Sunshine Creek: 1906
Two-mile Canyon Creek: 1909 (2 deaths)
Fourmile Canyon Creek: 2011
September 2013: 19 in rain over 8 days (5-100-yr flows depending on location)
Total insured coverage of $1,065,934,000
Premium costs of $3,540,676
500-yr floodplain: 0.2% chance of occurring in any given year
100-yr floodplain: 1% of being equaled or exceeded in any given year.
High-hazard zone: Greatest risk of loss of life. Should not be occupied by ppl during a flood
Development in 100-yr floodplain must also have sewer backups and no parking lots where flood water will be deeper than 18 inches, since cars float.
Yearly expenses (+4% every year for inflation)
Local drainage improvements: $850K
Preflood property acquisitions: $660K
Storm sewer rehab: $630K
Transportation-related flood and stormwater improvements: $630K
Stormwater quality improvements: $190K
Greenways - lottery fund: $150K (no 4% increase)
Greenways - flood fund: $98K (no 4% increase)
Utility billing computer system: $100K (one-time cost)
It's an "opportunity-based" program, meaning they have a list of priority properties and buy them as the opportunity arises. (Not often)
Like the E. coli TMDL Implementation Plan
$6M operating / $9M for capital improvement projects
Of course, we help fund that through property taxes. In BoCo, .608 mills ($304/year for home worth $500,000)
CIP for South Boulder Creek, Gregory Canyon Creek, Fourmile Canyon Creek
Flood mitigation planning studies for Upper Goose Creek, Two-mile Canyon Creek, Skunk Creek, Bluebell Canyon Creek, King’s Gulch
Floodplain mapping study for Sunshine Canyon
For flood projects, $2.1M is funded through cash and $4.2M by debt service
Yes, Sullivan says. Cities tend to do projects to that level if they can because of National Flood Insurance Program requirements.
Katie Knapp: It's encouraged by the national program. We did ours in 2013.
Yes, Sullivan says. (Expounding on that) bc parts of it doesn't have ability to convey much water without flooding
It's about $15M in a pipe network and $10M to improve capacity of section behind Edgewood to 5-10-year conveyance level.
Sullivan: That's an incorrect number, based on old data.
Yes, Baird says.
Wallach: "So we're looking at very, very significant" increases.
Baird: Yes, in terms of percentage.
Keep this in mind as we go through financial strategy and budget, he says.
$1.5M, on average. They don't tell us what to use it on, Sullivan says. But it's cooperative work with them.
The map we shared today is a great start to a convo about "what is realistic?" What can we build in the community?
"We will do our best as we scope the master plan to help council understand the interplay of these 16 drainage ways and what's realistic moving forward."