1997-06-07_REVISION - M1981302

• Permit No: M1981302
• IBM Index Class Name: Revision
• Doc Date: 6/7/1997
• Doc Name: ANALYSIS OF ISSUES RAISED BY THE BOULDER CNTY COMMISSIONERS IN CORRESPONDENCE DATED 4-17-97 WESTERN
• From: DMG
• To: FILE
• Type & Sequence: AM2
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Departm of of Natural Resources
1 31 3 Sherman 51., Room 21 S
Denver,Colorado 80203
Phone:[phone]b7
FAX:[phone]
DEPARTMENT OF
NATURAL
RESOURCES
Roy Romer
DATE: June 10, 1997 Governor
James S.Lochhead
TO: Gregg Squire Executive Director
Michael B.Long
FROM• Allen Sorenson Division Dveclor
RE: Analysis of the Issues Raised by Jane Bunin in
Correspondence Dated June 4, 1997, Western Mobile, Deepe
Farm Pit, Permit No. M-81-302
In a letter dated 6/4/97, Jane Bunin objects to the changes in the
Deepe Farm Pit reclamation plan proposed in the amendment
application currently under review by the Division. The intent of
this memorandum is to address the objections of Dr. Bunin through
technical and regulatory analysis .
ISSUE # 2
The Floodplain Implications of the Land Contours are Unknown
Quotes pertinent to Dr. Bunin' s concerns in this regard, from the
letter dated 6/4/97 :
All parties who are familiar with the South Boulder Creek
hydrology and floodplain agree that the alluvial floodplain
that includes the Deepe Farm Pit has complex and as-yet
unpredicted flood behavior. All agree that the land contours
of the pit (including the berm) have floodplain implications
with serious health and safety consequences. All are aware of
the current floodplain study by Taggart Engineering under the
auspices of Urban Drainage and Flood Control District that is
addressing flood hazard mitigation. The study is scheduled
for completion in September, 1997 . Without the results of
this study, the floodplain implications of the berm can not be
properly addressed. And current acceptance of the berm and
amendment topography would cripple the ongoing floodplain
planning process by predetermining important land contours.
Delineation of the one percent annual chance floodplain around the
Deepe Farm Pit if the existing perimeter levee is certified by FEMA
would be essentially the flood inundation area mapped in the 1986
Greenhorne and O'Mara, Inc. Flood Hazard Delineation. The "as-yet