ENFORCE20174

• Permit No: M1978052
• IBM Index Class Name: Enforcement
• Doc Date: 8/8/2001
• Doc Name: BULL SEEP MEETING MINUTES
• Media Type: D
• Archive: No

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BULL SEEP
MEETING MINUTES
AUGUST 8, 2001 10:00 nrvI
(REV IsEn 8/28/01)
MINUTES
Attendance: (SEE ATTACHED LIST)
Location: Urban Drainage & Flood Control District Board Room
Time: 10:00 AM
Date: Wednesday, August 8, 2001
Meeting Minutes:
1. Ben Urbonas (UDFCD)began the meeting by providing a brief introduction to the project and
introducing ICON Engineering to the attendees. ICON had been hired by the district as an
engineering consultant to the project.
2. Bryan Kohlenberg (UDFCD) followed Ben's introduction with a more comprehensive
summary of the project at hand. This included detail into the site's hydrology as provided in
a report entitled: "Mobile Premix Concrete, Inc., Final Drainage Report for Howe Pit,
Adams County, Colorado," prepared by Tuttle Applegate, Inc.. (1990). The report provides
that nuisance flows (i.e. flows in excess of 200 cfs) will be routed by way of First Creek
through the permitted Howe Pit mining operation to the South Platte River. The report
provides that the tailwater ditch called Bull Seep (or Bull Ditch) would be configured as an
open channel and sized to handle a flow of up to 150 cfs. The Bull Seep flow would join
with the Firs[ Creek nuisance flow channel and continue northward along the west edge of
the property where it would outlet into a slough at the northwest corner of the property.
Nuisance flows in excess of 200 cfs in First Creek would flow through by way of a 430 foot
side channel spillway." In addition, 4800-cfs is the 100-year discharge from First Creek that
passes through the pit.
3. Matt Ursetta (ICON) continued the presentation with a discussion of the exhibits provided by
ICON. The exhibits included an Existing Conditions Map, a map depicting the original Bull
Seep Relocation Plan, and two conceptual design alternatives to rehabilitate the Bull Seep
channel upstream of the confluence with the South Platte River. Observations from these
plans included: the existing alignment of Bull Seep was no[ consistent with the alignment
shown in the Reclamation Plan; Alternative 1 consisted of the construction of a 100-year
channel sized to convey 4800-cfs discharge from the Howe Pit overflow of First Creek,
Alternative 2 consisted of a smaller channel designed to carry nuisance flows from First
Creek and Bull Seep. This alternative would involve installing multiple spillway connections
between Denver Water's ponds to handle the 4800-cfs, 100-year, discharge from First Creek.
The final spillway would discharge directly into the South Platte River instead of the Bull
Seep Slough. Both alternatives included the installation of drop structures to help bring the
channel grade back to the existing conditions before the breakout occurred. Alternative #1
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