FLOOD01644

• Designation Number: 46
• County: Denver
• Community: Denver
• Title: Flood Hazard Boundary Map - Supplementary Report, Sanderson Gulch & Weir Gulch, Denver, Colorado
• Date: 3/1/1975
• Designation Date: 7/1/1975
• Floodplain - Doc Type: Floodplain Report/Masterplan

I
!I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I

A",'
~ ' '"
- .~'

b!l\
I

r~ ~ ! . \(d i . '-'!
I'~)' !,~r-~__ v, V vU
'1.1 ~ r""': ,-----..___

1;1/'- ',.' , '" , 1/, O[RYL W f!:; ~op)"

\. ,. " _ '. ClMCR C CLAYCOMB ,""",L:! ,/
I " . ',' , ') ,', LARRY A. MULL[R : L
-~-',--_ ',I ,I RICHARD L. HUSMANN
U. . ----- --- !.': FRED R. LAMurT. JR.
. D. ,> ;::'~--,,"'jj
C: . C ' ........._,~ .
. . D. Gl[NWOOD SPRINGS,
COLORADO 81601
JOY 945-86/6
June 26, 1975

Cingery Associates, Inc.

2840 SOUTH VALLEJO STREET
ENGLEWOOD, COLORADO 80110
TElEPHONE [phone]

Mr. Bill DeGroot
Urban Drainage & Flood Control District
181 East 56th Avenue - Suite 600
Denver, Colorado 80216

Re: Weir Gulch - Flood Plain Delineation
GAl Job No. 208.020

Dear Mr. DeGroot:

As agreed at our meeting of June 2, 1975, with Mr. Henry Boland and
Mr. Moe Tabatabai of the Wastewater Management Division, City and
County of Denver, we have delineated the approximate limits of
shallow flooding on Lower Weir Gulch, east of Federal Boulevard.
Maps showing this approximate limit are attached.

As indicated on the maps, we would consider the area within the
limits drawn on the maps to be an ~rea having the potential for
shallow flooding from flood overflows out of Barnum LaKe and Weir
Gulch. The overflow would occur for a 100-year storm event. Be-
cause of the flatness and development in the area, it is impossible
to determine the actual depth of flooding and the exact limits of
inundation. Under the Federal Insurance Administration guidelines,
the flood hazard zone or insurance rate zone for this area would
be AD. This zone is defined as follows:

"Special flood hazard areas with shallow flood depths and/or
unpredictable flood flow paths (sheet flooding)."

For areas of this type, the FIA does not determine base flood eleva-
tions or flood hazard factors.

The approximate limits shown on the maps have been delineated by
field investigation. All areas within the designated area may not
be inundated by flood waters. We would estimate that the maximum
depth of inundation would range from 1-2 feet. In other areas, out-
side of street gutters, flood depths would average from about 2 to
6 inches.

During the field investigation it was noted that most buildings in
the area had been constructed with first flood elevations well above
any potential flood level from Weir Gulch flooding. It is reasonable

'''.J'' ('''''''[VI~,r I ~'IJ1L'll IHi..Ir\JfJf:r J "IRltI"TIIRAI

TRc.r,!,PflRTr,TlnP>J I Wt.T,R g ,r.I~\T:;'llnN I rnv.pl!l\R <:;1 RVlCfc:.