Notes

Outline

Floods 2001 - 45 Busy Days Flood potential in District --- 25 days Serious flash flood threats --- 13 days Flash flood warnings issued --- 3 days (July 8, 10 & 13) July 31 was the 25th anniversary of the Big Thompson Flood

Harvard Gulch Flood Management Facilities

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Goldsmith Gulch Flood Management Facilities

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Temple Pond at George Wallace Park in the DTC

Sunday, July 8, 2001 The storm (rainfall & flooding conditions) Human impacts Performance of drainage and flood control facilities Things that worked well Things that could have worked better

The Storm Denver was hardest hit Streams & drainage systems impacted Goldsmith Gulch Harvard Gulch Cherry Creek I-25 (between Alameda & Evans)

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Human Impacts Cherry Creek Arts Festival Interstate closed Traffic problems at many locations Parking lot/cars flooded

Performance of Facilities Some things that worked well: Goldsmith Gulch at Temple Pond, Rosamond Park, Highline Canal crossing, Bible Park, Iliff detention & improved channels Harvard Gulch improved channels, road crossings, golf course detention & Logan Street outfall structure Cherry Creek

Performance of Facilities Some things that could have worked better: NWS chose not to issue flash flood watch (flash flood warning was issued during event) Plugged trash rack on Goldsmith Gulch at Iliff---caused flooding of cars in parking lots and on streets (vicinity of  Monaco and Evans---apartments, K-mart, Walgreen's affected) I-25 underpasses “Lake Logan” and Evans (T-REX expected to improve conditions)

Harvard Gulch July 8, 2001 Flood Event

Harvard Gulch at Jackson Street downstream of Colorado Blvd.

Harvard Gulch at University

Harvard Gulch upstream of Downing

Harvard Gulch at side channel detention spillway near Hole #4 green—Harvard Gulch Park G.C.

Harvard Gulch at Logan St.

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Harvard Gulch at Logan Street a.k.a. Harvard Gulch Park

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Goldsmith Gulch July 8, 2001 Flood Event

George Wallace Park at DTC a.k.a. Temple Pond

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Goldsmith Gulch at Rosamond Park & downstream along Tamarac

Goldsmith Gulch culvert inlet at Tiffany Plaza

Goldsmith Gulch at Eastman Avenue

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Iliff Detention Basin—offline storage facility (Monaco Street is left of photo)

Iliff Detention Basin

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Goldsmith Gulch trash rack @ Iliff

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Apartments @ Iliff

Flooding near K-Mart at Monaco & Evans

Monaco & Evans--Walgreens in background

Goldsmith Gulch looking upstream from Jewell Avenue (Monaco is on left)

Goldsmith at Jewell--the next day

Goldsmith flow-splitter at Jewell

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Looking upstream from Mexico

Looking upstream from Mexico

Goldsmith Gulch at Cook Park

Goldsmith Gulch at Cook Park

Cherry Creek July 8, 2001 Flood Event

Cherry Creek upstream of Champa

I-25 ‘The Valley Highway’ July 8, 2001 Flooding

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Veterans Park near I-25 and University

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‘Lake Logan’ (I-25 underpass)

Recreation at ‘Lake Logan’