PERMFILE105538

• Permit No: M1989044
• IBM Index Class Name: Permit File
• Doc Date: 6/6/1989
• Doc Name: ADEQUACY REVIEW-TWIN CREEK CAMPGROUND FN M-89-044
• From: MLRD
• To: CLARE CORP
• Media Type: D
• Archive: No

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DEPARTMENT OF NATURAL RESOURCES

COLORADO
Amer, Gove
MINED LAND RECLAMATION DIVISION
FRED R. BANTA, Dlreetor
June 6, 1989
Mr, Harold E. Clare II
The Clare Corporation
18061 Teller Co. One
Florissant, Colorado 80816
RE: Adequacy Review, Twin Creek Campground, File No. M-69-044
Dear Mr. Clare:
The Division has reviewed the application you submitted for the sand and
gravel operation known as Twin Creek Campground which was determined complete
on May 16, 1989. In addition, the Division completed an inspection of the
site on May 17, 1989. The following questions and comments on the adequacy of
the application require clarification after review by the Division.
Exhib it C - Mln1n0 Plan
1. The mine plan states that the old lake previously present on the site has
been filled in by sediments. The lake was drained more than 25 years ago
under direction of the State Engineer's Office when it appeared a flood
may occur which would overtop the dam. Since that time the stream has
downcut the previously-laid deposits and left a steep channel or gullet'
through the north portion of the area to be mined. A permit from the
Army Corps of Engineers has been obtained to replace the fill to create
the dam and restore the lake.
The Division recommends .you modify the lake configuration to include a
sf~diment forebay at the mouth of the lake. This forebay is constructed
by placing an embankment across the upper (upstream) portion of the lake
to cause sediment to be preferentially deposited behind the embankment
and not uniformly across the entire lake bottom. Thus, sediment (sand)
can be dredged from this localized area on an annual basis while leaving
thie greater portion of the lake relatively clean and sediment free.
Maintenance of the lake is reduced for longer periods and disturbance is
concentrated in the forebay area. Water quality should benefit.
The forebay embankment itself can be constructed in either of two ways.
It can be either: (1) built to protrude above the expected waterline
(one foot or so) with a culvert placed through the embankment to connect
the forebay with the lake; or, (2) built to be submerged below the
expected waterline (one foot or so) so that the two waterbodies are
215 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. [phone]