HomeMy WebLinkAbout20060994.tiff fi DEPARTMENT OF PUBLIC WORKS
"An APWA Accredited Public Works Department"
/ Public Work Department STORMWATER MANAGEMENT DIVISION
/ City of 1001 9th Avenue, Greeley, Colorado 80631 • (970) 336-4074 • FAX (970) 336-4019
Greeley
March 21, 2006
Mr. Dave Jula
355 Union Blvd. Suite 200
Lakewood, CO. 80228
RE: CITIZEN COMMENTS TO FEMA FLOODPLAIN MAPS
This letter is to transmit information to the FEMA Mapping Contractor concerning citizen
comments about the proposed floodplain maps for Greeley, Colorado. This information concerns
the floodway delineation on the downstream side of 71'4 Ave. where it crosses the Cache Le Poudre
River.
Included with this letter is a copy of a March 14, 2006 letter from Mr. J. Freese, P.E. and land
surveyor who has collected 71s`Ave. roadway profile elevations South of the River. He is
questioning the accuracy of the Cache Le Poudre River floodway delineation in this area and
downstream of the roadway.
If you have any comments or questions, please contact me at 970-336-4031.
Sincerely,
Ron Hoagland, P.E.
Stormwater Division Manager
City of Greeley Public Works Department
cc: Chuck Esterly, P.E., Public Works Director, City of Greeley
Mr. Doug Bellomo, P.E., CFM, Chief, Hazard Identification Section, Mitigation Division,
Federal Emergency Management Agency, 500 C Street Southwest, Washington, DC 20472
Mr. Dan Carlson, Senior NFIP Specialist, U.S. Department of Homeland Security DFC,
Building 710, Box 25267, Denver, CO. 80225-0267
Mr. Joel Hemesath P.E., Floodplain Administrator, City of Greeley
Honorable Mike Geile, Chairman, Weld County Board of Commissioners, P.O. Box 738,
Greeley, CO. 80632
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SERVING OUR COMMUNITY • I T ' S A TRADITION
70e promise to preserve andimprooe lEe yua/ily of*,for Sreefey i/irou9Fe limey, courteous and cost e//eclioe service.
FREESE ENGINEERING
P.O.BOX 913
217 EAST 18*s STREET j_ �� !,
OREELEY,COLORADO 80631 f I I
.IA4ER'NY F1 19701352-0100 ..• I` 6 axe
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MUSTERED El'RH' ER f G1 T�' tiq A.": �.
Plod LAND SLRVE5IIt NA?, OFF ICE
March 14th, 2006
Honorable Mike Gale
Chairman,Weld County Board of Commissioners
P.O. Box 738
Greeley Colorado,80632
Subject FEMA Map Sta 788+06
WCR#29 (AKA 71st Avenue)
Dear Sir
At the request of Mary Jane Duran-Blietz of 760 N. 71st Ave, Greeley Colorado, Freese
Engineering made an elevation survey of the centerline of 71st Ave, south from the south
end of the existing bridge. (Map of elevations enclosed).The centerline of 71st Ave. appears
to correspond with Sta 788+06 as shown on the FEMA preliminary Map. From the draft
Flood Insurance Study Revision- Cache La Pourde River, City of Greeley and Weld County,
Colorado, July 2003. The water surface elevation without floodway is 4698.0 at Sta
788+29.
The results of our survey show an elevation of 4698.74, 300 feet south of the south end of
the bridge.The bridge de&itself is at 4703.85,nearly six(6) feet above the 100-year flood
elevation. While not within the scope of our employment, I feel that the elevations leading
up to the north side of the bridge would be similar to those on he south side.
It appears that the bridge and WCR #29 may act as a dam across the river. From the
elevations shown on the flood map (Copy Enclosed), it is difficult to determine if the effects
of the elevated road and bridge have been considered in the defining the floodway and
floodplain.
We would therefore request that prior to the approval of this portion of the FEMA Map that
this situation at WCR#29 (71st Ave.) and the Cache La Poudre be more fully investigated.
If you have : re.t ;F,.s,please contact me at(970)352-0100.
_ •Misr• F
Jasper l. �'r;`alllO��Jir�a'� Cr
Eric (1. Sa, �r'�.� e.)
(2. „I al;. •.3 d' ,•
CC: City of _ eyy"-
FEMA
Mary Jane Duran-Blietz
Job 4 2004-012
ROAD PROFILE WCR #29 (AKA 71ST AVENUE)
FREESE
ENGINEERING 760 NORTH 71ST AVE
217E 18th Street GREELEY COLORADO, 80634
GREELEY, COLORADO
(970) 352-0100
0+00 4703.85
SOUTH END OF BRIDGE CONCRETE
0+50 470339
1+00 4702.65
APPROXIMATE
STATION NORTH
788+06 N.T.S.
(FLOOD STUDY MAP) 1+50 4701.85
WCR #29
1+70 4701.44
€ e DRIVEVAY
2+00 4700.79
2+26 4700.27 469760
E e NV HOUSE CORNERD ELEVATION
e NV HOUSE CORNER
2+50 4699.68
FF. NORTH £ 469805
FF. SOUTH 5 469650
BASE FLOOD ELEVATION
(BFE) 46973
3+00 4698.74
ELEVATIONS BASED
ON CPU. KING SURVEYORS
4F NAVD '29'
3+50 4697.98
3+63 4697.86
c e rL DRIVEVAY SOUTH JOB 12004-012
I certify the elevations on the above descrbed road profile, this FRFF--date-16-Feburayr-2604. , o_
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