PERMFILE43804

• Permit No: m2004044
• IBM Index Class Name: Permit File
• Doc Date: 11/22/2004
• Doc Name: Adequacy Review Response
• From: Tetra Tech RMC
• To: DMG
• Media Type: D
• Archive: No

Mr. Larry Oehler
TETRA TECH RMC Adequacy Response M-2004-044
November 22, 2004
Page 3 of 20
bridges between Phase 3 and the West Fill Area. Also, use that map symbol
between areas that will not be affected but are in areas that otherwise are to be
affected, such as, the portion of the Kerr McGee Oil Well Tank and Separator
and associated road. See the definition of "Affected Land" Rule 1 Section
1.1(3). For 112 permits, an Affected Land Boundary must be used to show the
boundary between land within the Permit Boundary that will be affected and
land that will not be affected Another example of where the Affected Land
Boundary line should be used is between the West Fill Area and the Brighton
and Brantner Ditches and between the Phase 3 area (including the slurry wall)
and the unaffected corridor for the Brighton Ditch and the power line.
Please refer to the response provided in item (3) above.
S. On sheet 5 of 7 (Mining Map), a solid line is shown extending east -west across
the narrowest portion of Phase 1. This is an unnecessary line and makes the
map a little confusing. Eliminate the line or explain why it should remain.
This line is the parcel line referenced to the legal descriptions on the Existing
Conditions Map. The line has been removed from the Mining Plan Map (Sheet 5
of 7).
Exhibit D -Mining Plan
1. Commit to providing any necessary revisions to the mining plan, in the event
that the County Floodplain Use permit Process requires a different setback
distance from the top of the South Platte River Bank or different protection
measures on the inside reservoir bank.
If the Adams County Floodplain Use permit process requires changes to the
Mining Plan Maps that impact the DMG permit, the applicant will submit a
technical revision to the DMG.
2. Provide plans for Division review, which will ensure adequate erosion and
sediment control measures for protection of the Brantner and Brighton Ditches
and the quantity and quality of water in the ditches. The plan should include
construction plans /designs for al[ facilities such as diversions and sediment
basins or other facilities that will be used to prevent flood and sediment damage
to the ditches. The plans should consider the maximum possible 10 year 24
hour storm event. The earliest possible establishment of vegetative cover would
be a good practice for control of erosion and sedimentation a~:d should be
included in your plans. Your plan for filling the West Fill Area appears to
include creating piles 30 feet high with 1 h: l v slopes. Such lo~ag steep slopes
would cause rapid runoff and be very erosive. Less steep slopes such as 3h:1 v
would be much easier to establish a protective vegetative cover on. The Division
H:\3919_019_OIUILRB\DMG Response\lst Adequacy Response to DMG I I-5-04.doc