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Z AERIAL INSPECTION REPORT Subject: Mesa Lake Reservoirs #1, #2 and #3 Mesa Creek No. 4 Reservoir Jumbo Reservoir Dam W. Div. 5 W. Dist. 72 Date: July 25, 1979 The dams are located approximately 25 miles east of Grand Junction, Colorado, and just off Stato highway 65 through the Grand Mesa National Forest. Most of the dams are on tributaries to Mesa Creek and within about 1/2 mile empty into Mesa Creek. The general land use for this area is forest land. The analysis of the reach will extend for about 12 miles to the north to Plateau Creek. Mesa Lake Reservoirs #2 and #3 empty into Mesa Lake No. 1 within 500 feet. Cabins near Mesa Lake No. 2 and Mesa Lake No. 3 seem to be located outside of a dam breach floodwave. Jumbo--The Jumbo channel empties into Mesa Creek within about 2,000 feet. No hazards were seen in this reach. Mesa Creek #4 is on an unnamed tributary which empties into Mesa Creek one mile west of the dam. The channel crosses under State Highway 65, which is the only hazard in this reach. Reach #1--The reach begins at Mesa Creek No. 1 Dam and heads in a northerly direction through heavily forested land, heavy vegetative growth, and a meander. There are tall trees within the stream channel. There are some lodges and also some campgrounds near the dams. They all seem to be above the flood channel and out of harms way, except for the homes located below Beaver Lake No. 1. These homes are located about 25 feet laterally from the stream channel and about 5 feet vertically above the stream channel. The dam height of Mesa Lake No. 1 is about 30 feet high. The channel which goes beside the homes has a live and flood stream channel width of about 300 feet and is relatively flat. The vegetative growth is moderate beside the hazards. Reach #2--Reach no. 2 begins at a point where a canal empties into Mesa Creek about 5 miles downstream from the dam (see photo no. 15). In this reach there is heavy vegetative growth, rough bottom, and meandering stream. A picture of a small barn was taken in this reach. At a point about 7 miles downstream from the dam there are numerous homes. The reach has a similar description through this area. The homes are located about 300 feet laterally left and from 25 to 40 feet above the stream channel through this section. The live stream channel has a width of about 5 feet and a depth of about 5 feet. The flood channel has a width of about 100 feet and a depth of about 25 feet, with side slopes of about 3:1. Up above the 25 feet, the area is relatively flat. About 10 miles downstream from the dam are two homes located laterally left by about 100 feet and about 20 feet vertically above the stream channel (see picture 19). The stream channel through this section has a width of about 100 feet for the i'lood channel, side slopes are 3:1, and a depth of about 20 feet. A house located at the confluence of Plateau Creek with Mesa Creek is about 25 feet laterally right of the streambed and about 5 feet above the stream channel.