Field Report for the South Platte River in Littleton South Platte Park

Home Browse Search

a ` for the tops of the March 8 showed that these boulders. This provides velocity boulders were rough slightly above water surface P a fairly wide range of flows. The observationsimatel pp 9 completely submerged as the flow was approx proximity just upstream o Y f boat chute no. 4. These deflectors P pushes Deflectors no. 2 and no. 3 are close fl the water at higher flows which work so that deflector no. 2 pushes water to the right at higher flows and deflector no. 3 P water back to the left. These deflectors deh bitatt through this t reach. This deep habitat is area and scours the area and maintains a d P of material that is scoured from the deflector maintained at low flows by the deposition deposited downstream of those two features. t h a t i cluster no. 4 provides instream habitat for water cover at and 3. Boulder cluster no. 4 p near deflector no. the boulders in the water. j Boulder rov* s at the observe des velocity shelter an Y Depth is approximate 2 feet or greater adjacent to the boulder cluster ow o September 18. re that controls water upstream and focuses the main channel flow to Boat chute no. 4 is a structure poo that is developed upstream and controlled ,i the center of the stream channel. There is a large p chute. The structure at the o f the boat b the boulders and grouting in boat chute no. 4. Pool depth is greater than 3 feet upstream o the auxiliary the structure and a plunge pool has formed e as water cascades through the boulders thro the boat chute and also in some of rs that make observed flow provides passage for channels to the left and right of the boat chut up the face of the chute. t o. 4 and boulder cluster no. 5 are located downstream of er no. 5 have a which is Deflector n } ater back to downstream of Mineral Avenue. Deflector no. 4 and boulder both of these ween the structures. Deflector no. 4 is on the right channel f from moving to the right- 3 that runs bet the left. It also provides bank stabilization and d kees the river develo e loped at the face of the structure. Water is greater the s tructure. Boulder to A scour has P o the left side of the channel, provides velocity shelter and also the structure and providesIienstream cover and velocity shelters tream of bo cluster no. 5, which is m ore formed by the scouring. This scour deposition controls instream cover. The substrate scoured at higher flows has deposite oo owns e 'lout of the p to roved P the upstream wate forms the tai es p d he two s tructures features an conjunction with t r surface and works in ) water habitat at low flows. 5 and boulder cluster no. 6. The opening at boat downstream of the boat chute. Boat chute no. main channel to provide deep t chute kee g s h the channel from s and ma intains rov de stream The right side wing of the boat chute P channel to the center of the stream. There is a small ssp hove spillover up hntodthe channel provide runs move some passage for small fish but large fish could not wino. The main channel provides more than adequ and depth some places of these s er deeper than 2 feet into the right b are similar to the other boat chutehe boulder cluster downstream of the boat chute provides boat chutes, deeper than 4 feet. velocity s helter and instream cover for fish in the channel. The top of the boulders for boulder Habitat-Control Structure Investigations South Platte River Page 4 November 6, 1998 in South Platte Park Consultants, Inc. C -470 Miller Ecological