FLOOD01761

• Designation Number: 83
• County: Larimer
• Community: Unincorporated Larimer County
• Stream Name: Big Thompson River
• Title: Floodplain Information Report - Big Thompson River, Loveland to the Larimer-Weld County Line, CO, and the Little Thompson River, Boulder and Larimer Counties, CO
• Date: 6/1/1977
• Designation Date: 11/1/1977
• Floodplain - Doc Type: Floodplain Report/Masterplan

Table 8 (continued)
Flood Plain Reference Data
Little Thompson River
Boulder and Larimer Counties Near Berthoud, ColoradO
StreaJ/ IO~Year 50-Year I DO-Year 5()0~Year
Reference Distance "," """" Flood FlOOd FlOOd
Point '9 Elev(ltion Elevation Elevation Elevation Elevation
Identification Nunber Feet Ft.-"I.S.L. Ft.-+LS.L ft....M.S.L. ft.-+1.S.L. ft.-M.S.L.
" 110,090 5025.5 5031.5 5032.9 5034.2 5036.5
" 109,280 5022.0 5027.1 5026.8 5029.4 5030.8
Cross Section 3...3 50 108,630 5017.5 5023.5 5025.0 5025.7 5027.3
" 107,<100 5013.5 5019.0 5020.5 5021.3 50n.<I
52 107,200 5011.2 5018.9 5011l.3 5019.0 5020.5
" 107,C70 5011.1 5016.5 5018.0 5018.6 5020.Q
" 106,970 5011.0 5015.8 5QI7.1 5017.9 5019.5
" 106,400 5007.5 5012.0 5013.3 5013.9 5015.6
" " 105,720
0 5005.0 5009.9 5011.2 5011.9 5013.2
" 105,080 5002.0 5007.0 5009.2 5009.7 5011.0
;S 104,475 4998.0 5004.9 5006.6 5008.2 5010.0
Co~nty >'Glld 59 104,250 49<17.5 "IS 5003.4 "IS 5005.8 0/5 5007.4 U/S 5009.6
O/S 5001.1\ '" 50m.:> 0/5 5004.0 015 5005.5
00 104,200 '-995.5 5000.9 5001.8 5003.3 5005.3
" 103,700 4992.8 4999.2 5000.9 5001.7 5004.5
" 103,300 4992.0 4998.0 5000.1 5001.2 5004.0
" 102,860 4991.0 4996.0 4997.0 4997.7 5000.8
" 102,600 4990.5 4995.7 4996.8 4997.5 5000.0
!J Low water elav~tjon a5 deternined by 30ri,,1 photoqrllmmetric methods.

T~ble 8 (continued}
Flood PI"ln Reference Data
Little T~pson River
Boul<lerand Larimer Counties Near Berthou<l, Colorado
'I 10-Year 50-Year 100-Year 500-Year
Stream-
Reterence Distance """ Flood """" """" flood
Point '9 Elevation Elev"tlon Elevation Elevation Elevation
Identi/iC3tion N\lmt,er feet !' t. -~4. S . L. ft.--I>1.S.L. Ft.-+1.S.L. ft.-M.S.L. Ft.-M.S.L.
-
',5 101,600 4986.5 4992.8 4994.2 4994.9 4996.0
" 101,000 4984.7 4990.5 4991.8 4992.4 4994.7
" 100,510 4983.0 4988.4 4990.2 4991.1 4993.9
,~ 100,200 4982.0 4987.8 4999.7 4990.7 4993.8
,,- , Hi<]hwlly287 " 99,670 4980.5 U/54987.! U/S4988.1 UIS 4989.4 "" 4993.0
,-
0/54965.5 0/$4987.0 015 4987.9 015 4990.2
" 98,870 4977.0 4981.5 4983.1 4983.9 4986.6
" 98,200 4975.0 4979.8 4981.8 4982.6 4985.8
. " 91,100 4973.5 4979.0 4981.1 4982.1 4985.6
0
" 97,120 4972.0 4978.5 4980.7 4981.8 4985.2
'/3" 96,950 4971.7 4978.4 4980.7 4981.7 4984.1
County R""d " 96,915 4971.5 UIS 4978.4 UIS 4980.6 U/S4981.6 "15 4983.8
0/$4977.1 D/S4979.0 0/$4979.8 0/54981.8
Diversion " '16,550 4970.0 4974.5 4976.7 4977.3 4979.7
Structure " 96,520 4967.0 4970.2 4973.0 4973.9 4976.~
n 96,150 4963.0 4968.5 4970.4 497!.3 4974.1
" 95,950 4962.5 4966.8 4968.5 4969.3 4972.6
" 95,400 4959.0 4965,2 4967.3 49611.1 4970.3
J.! Low water elevation as deterMined by aerial photogrammetrlc methods.