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Larimer County, Colorado: records in the National Inventory of Dams

Larimer County, Colorado had 156 records in the inventory, 64 of them high hazard, as of October 30, 2026, according to the National Inventory of Dams.

The NID prints the county as Larimer. A count is of records, which include the separate structures recorded with a dam.

Larimer County, Colorado, October 2026

64
High-hazard records
October 2026
1st of 63 counties the NID names in Colorado; 41.0% of the county’s 156 records. A hazard class is not a risk.
49
High hazard, condition published
October 2026
0 rated Poor or Unsatisfactory.
15
High hazard, condition not published
October 2026
15 not provided to the NID, 0 with no condition assessment in its file.

Records by hazard class

1 more column on a wider screen

The 156 records the NID places in Larimer County, Colorado, by the hazard class the responsible agency assigned, October 2026. A class is the consequence of a failure, not its likelihood.
Hazard classRecords
High64
Significant30
Low62
Undetermined0

Every record in Larimer County

High hazard first, then by Federal ID. Each opens the record’s own page, with every field the NID publishes for it. Names are the NID’s, as printed.

2 more columns on a wider screen

The 156 records the National Inventory of Dams lists in Larimer County, Colorado, with the hazard class and the condition assessment of each, as of October 30, 2026
Federal IDDam nameHazard class
CO00123Barnes MeadowHigh
CO00127Chambers LakeHigh
CO00129Cobb LakeHigh
CO00130ComancheHigh
CO00138HourglassHigh
CO00139Indian CreekHigh
CO00140Long DrawHigh
CO00143Milton SeamanHigh
CO00145PanhandleHigh
CO00146Park CreekHigh
CO00150Peterson LakeHigh
CO00154Water Supply No 3High
CO00157Boyd LakeHigh
CO00165Lon HaglerHigh
CO00166MarianoHigh
CO00167Rist - BensonHigh
CO00512Floodwater Ret. B-3High
CO00524Floodwater Ret. B-4High
CO00823Loveland Water StorageHigh
CO00837North Poudre # 2High
CO00838North Poudre # 3High
CO00841North Poudre # 6High
CO00842North Poudre #15High
CO00845RichardsHigh
CO00850Terry LakeHigh
CO00851Cache La PoudreHigh
CO00852Warren LakeHigh
CO00855Windsor #8High
CO01163DouglasHigh
CO01164ElderHigh
CO01165Fossil CreekHigh
CO01169HalliganHigh
CO01174Long PondHigh
CO01187Lake LovelandHigh
CO01406Floodwater Ret. B-2High
CO01650Carter Lake Dam 1High
CO01650S001Carter Lake Dam 2High
CO01650S002Carter Lake Dam 3High
CO01654Flatiron DamHigh
CO01659Horsetooth DamHigh
CO01659S001Horsetooth-Dixon CanyonHigh
CO01659S002Horsetooth-Satanka DikeHigh
CO01659S003Horsetooth-Soldier CanyonHigh
CO01659S004Horsetooth-Spring CanyonHigh
CO01660Marys Lake Dike 1High
CO01660S001Marys Lake Dike 2High
CO01662Olympus DamHigh
CO01663Rattlesnake DamHigh
CO01759Water Supply No 4High
CO01766Joe WrightHigh
CO01769HandyHigh
CO01771Ish #3 (Main Dam)High
CO02015College #3High
CO02018North Poudre # 5High
CO02020Rocky RidgeHigh
CO02036KluverHigh
CO02363East Portal DamHigh
CO02364Lily Lake DamHigh
CO02667RawhideHigh
CO02719EqualizerHigh
CO02905Flood Control Basin No. 1High
CO02922Dry CreekHigh
CO02932Crow Lane No. 1High
CO02979East Side Detention FacilityHigh
CO00131Curtis LakeSignificant
CO00132Dowdy LakeSignificant
CO00156BerthoudSignificant
CO00164HerthaSignificant
CO00551Floodwater Ret. B-5Significant
CO00836North Poudre #1Significant
CO00839North Poudre # 4Significant
CO01155Annex #8Significant
CO01159Clarks LakeSignificant
CO01162Dixon CanyonSignificant
CO01170ParvinSignificant
CO01176HiawathaSignificant
CO01183FairportSignificant
CO01184Horseshoe Lake (East Dam)Significant
CO01190Loveland LakeSignificant
CO01192George RistSignificant
CO01194Ryan GulchSignificant
CO01195South SideSignificant
CO01196Sunny SlopeSignificant
CO01734Lone TreeSignificant
CO01765WorsterSignificant
CO01768Donath LakeSignificant
CO01990SherwoodSignificant
CO02014ClaymoreSignificant
CO02022Twin Lakes ReservoirSignificant
CO02238Floodwater Ret. B-6Significant
CO02352FairwaySignificant
CO02360Carriage Hills #1 (Upper)Significant
CO02836Horseshoe Lake (South Dam)Significant
CO02962Aspen LodgeSignificant
CO00124BarrettLow
CO00125Box I #1Low
CO00126Box Elder #1Low
CO00133Dry CreekLow
CO00136Fox AcresLow
CO00141Martin Seepage #2Low
CO00142MattinglyLow
CO00152Slab CanyonLow
CO00153WassonLow
CO00155Mountain Supply #10Low
CO00160Cattail #1Low
CO00375JohnsonLow
CO00376Little HohnholtzLow
CO00584Fox Acres #3Low
CO00606Lone PineLow
CO00738Cattail PondLow
CO00848Snake LakeLow
CO00849South GrayLow
CO00858CulverLow
CO01152Lost LakeLow
CO01156BellaireLow
CO01158Box Elder #3Low
CO01167North GrayLow
CO01173LindenmeirsLow
CO01177Mountain Supply # 7Low
CO01767Cedar SpringsLow
CO01865Box Elder #5Low
CO01867HinkleyLow
CO01986CaverlyLow
CO01988Mountain Supply # 6Low
CO01991Zimmerman LakeLow
CO02013RamonaLow
CO02016Groth Pumping SystemLow
CO02034Deer LakeLow
CO02035Box Elder #2Low
CO02038Mitchell #3Low
CO02039Mountain Supply # 9Low
CO02040North Poudre #11Low
CO02041Twin LakesLow
CO02042Upper StonewallLow
CO02064Erie LakeLow
CO02065Watson LakeLow
CO02200Fox Acres #2Low
CO02215Mountain Supply # 1Low
CO02255GeistLow
CO02256DixonLow
CO02257DyekmanLow
CO02258HoutsLow
CO02297Nakomis LakeLow
CO02353Mountain Supply # 2Low
CO02357Apache Lake ReservoirLow
CO02359Rist CanyonLow
CO02717Meadow LakeLow
CO02727Willow LakeLow
CO02790Pavel #4Low
CO02792Westerdoll LakeLow
CO02965Bellvue Water Treatment Pond #1Low
CO02966Bellvue Water Treatment Pond #2Low
CO03000Rainbow LakeLow
CO03001RiddleLow
CO03010Treiber Lakes ReservoirLow
CO82913Little Hell Creek Diversion DamLow

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The immigration link above is EOIR’s courts, which sit in this state. CBP’s encounters are not by state and will not be: its sectors and field offices are areas of responsibility rather than a geography, and assigning them to states would be a claim the data does not make. Immigration and the border.

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Sources

Compiled automatically from National Inventory of Dams — national CSV by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved