ENFORCE25630

• Permit No: M1978052
• IBM Index Class Name: Enforcement
• Doc Date: 9/17/2001
• Doc Name: BULL SEEP MEETING MINUTES
• Media Type: D
• Archive: No

13. John Hamilton asked how the new mapping was developed. Matt explained that [he
mapping flown by Denver Water in January 2001 was supplemented with field survey by
ICON and Denver Water, and then combined and re-surfaced to develop a new project
map. The mapping also included a completely new topographic survey aoound the
confluence with the South Platte River and along Bull Seep, south of Ken McIntosh's
property.
14. A discussion followed concerning the installation of a crossing for access between
Mclntosh's property and the Hazeltine Pit. Jim Weldon expressed concern that there was
substantial bank erosion and the crossing may a bit more extensive than what was shown
by the plan. Ken McIntosh agreed and thought that the crossing may be able to be
incorporated into the proposed drop structure to provide additional protection against
another washout. The two 36-inch pipes, shown on the plans, were not proposed to pass
the 350-cfs dischazge.
15. Denver Water mentioned that some access easements might need to be formalized for all
of the access users. Bryan stated that the District might not need a new access agreement.
They currently have an easement along the river on the Hazeltine property which allows
for access to this easement through the pit azea
16. John Hickman asked if the grade control in the South Platte River could be increased in
height in order to reduce the height of the Bull Seep Slough Drop Structure. He also
inquired about the possibility to build the grade control with the potential to increase the
height in the future. Bryan mentioned that they were limited to a 3-foot drop by the COE
404 General permit. Anything above 3-fr would involve an individual permit and would
be subject to EPA, US Fish & Wildlife, and others review. Bryan also mentioned that the
Bull Seep Slough drop would need to be designed congruently with the South Platte
Grade Control. Therefore, the District would not decrease the height or toe depth of the
Bull Seep Drop Structure even if the potential to raise the grade control crest in the future
existed.
17. Ken mentioned that he has noticed a down cutting of over 8 feet in the South Platte River
bottom.
18. Scott Franklin asked about the potential for head cutting upstream of the Bull Seep
Slough Drop, on Bull Seep. Matt mentioned that the design slope above this point was
estimated to be around 0.2%. Therefore, the potential for head cutting would be rather
small. Scott mentioned that if head cutting did occur, it would tend to reduce [he
irrigation flow to the trees.
19. The general soil conditions of the site were discussed. It was mentioned that the general
makeup of the site consisted of a few feet of silty sand above a large gravel deposit.
20. Jim Weldon asked about the preferred location of Bull Seep. Ken mentioned that he had
provided John Hickman with a letter discussing terms for keeping the Bull Seep
discharge on his properq~. Unfortunately, he did not give John the letter until today's
meeting. Therefore, Lafarge did not have a chance to review it and comment.
21. Bryan again mentioned that he was looking for Lafazge/Denver Water and Adams
County to agree on a location for Bull Seep on the Howe-Haller Pit property. John
Hickman suggested taking amm inventory of the size and condition of the trees in the
conservation easement. Matt mentioned that ICON has compiled the tree sizes as part of
their field survey and [his information can be passed ou to Lafarge for their use. The tree
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