Platte Canyon

The High Line Canal (HLC) is a man-made waterway, used for irrigation and recreation, that serves the Denver-Aurora metropolitan area. It begins at a diversion dam on the South Platte River, some 1.8 miles (2.9 km) above the mouth of Waterton Canyon. From its headgate, the HLC runs generally northeast for 66 miles (106 km) (historically 71 miles), passing through Douglas, Arapahoe, Denver, and Adams Counties.

Waterton, Colorado is a populated place located along the South Platte River in Platte Canyon (also known as Waterton Canyon) of Jefferson County, Colorado. Cañon Spur in Waterton was a Denver, South Park and Pacific Railroad (DSP&P) station. It was a settlement named Enterprise, with a post office from 1879 to 1881. Its name was changed to Platte Cañon, legally changed to Watertown in 1916, and is now known as Waterton. It is located near Kassler, another DSP&P station, established in 1872.

Roxborough Park is an unincorporated community and a census-designated place (CDP) located in and governed by Douglas County, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The population of the Roxborough Park CDP was 9,416 at the United States Census 2020. The Roxborough Village Metropolitan District and the Roxborough Water and Sanitation District provide services. The Littleton post office (Zip Code 80125) serves the area.

Sterling Ranch is an unincorporated community and a census-designated place (CDP) located in and governed by Douglas County, Colorado, United States. The population was 1,789 at the 2020 census. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. Douglas County governs the unincorporated community and the Sterling Ranch Community Authority Board provides services through several metropolitan districts. The Littleton post office (Zip Code 80125) serves the area.

Chatfield State Park is a state park located in Douglas and Jefferson counties of Colorado, United States. The park centers on Chatfield Reservoir, a 1,423 acre surface area lake fed by the South Platte River and two other creeks, including Plum Creek.

Roxborough State Park is a state park of Colorado, United States, known for dramatic red sandstone formations. Located in Douglas County 20 miles (32 km) south of Denver, Colorado, the 3,339-acre (13.51 km2) park was established in 1975. In 1980 it was recognized as a National Natural Landmark.

Hildebrand Ranch is located near Littleton, Colorado. In 1866 Frank and Elizabeth Hildebrand settled in Deer Creek and homesteaded on 160 acres. In the 1950s there was a plan that was authorized to control flooding in Denver but the funds never came. In 1971 the Army condemned 333.73 acres of the ranch and created Chatfield Reservoir. In March 1973 Denver leased 750 acres from Chatfield and 67 for the Denver Botanic Gardens which included the ranch's original buildings. In February 2001 Jefferson County Open Space purchased 1,450 acres of Hildebrand Ranch

Chatfield Dam and Reservoir is a dam and artificial lake located on the South Platte River, south of Littleton, Colorado. The dam and reservoir were built by the United States Army Corps of Engineers as a response to the disastrous flood of 1965. In addition to its primary purpose of flood control, it serves as one of many water supply reservoirs for the city of Denver, Colorado. In 1966, the U.S. Atomic Energy Commission projected a total federal cost of $74 million. Construction of the project was begun in 1967 and the dam was completed in 1975. The massive breastworks of the dam measure approximately 13,136 feet (4,004 m) in length with a maximum height of the dam of 135 feet (41 m) above the streambed. The normal depth of the lake is 59 feet (18 m) at its deepest point. This means the dam towers 88 feet (27 m) above the mean surface of the reservoir. The lake drains an area of more than 3,000 square miles (8,000 km2). The 1,500 acre (6 km2) lake has a conservation storage capacity of 27,000 acre⋅ft (0.033 km3) with a flood-control pool of over 350,000 acre⋅ft (0.43 km3)

Collegiate Academy of Colorado is a small charter school located in the Ken Caryl area of unincorporated Jefferson County, Colorado, United States. It is a kindergarten through twelfth grade charter school with approximately 480 students (2009–10 enrollment). The school has a postal address of 8420 S. Sangre de Cristo Road, Littleton, Colorado, 80127. It opened in 1994. The school has its own athletic field which it rents out for other uses. It has a gym, a cafeteria, and a playground. Its mascot is a wolf, and the school colors are crimson and dark green.

Plum Creek is a stream in Douglas County, Colorado, United States. It is formed by the confluence of West Plum Creek and East Plum Creek near the intersection of North Perry Park Road and Manhart Avenue in Sedalia. Prior to the construction of Chatfield Reservoir in the 1960s and 1970s, Plum Creek merged with the South Platte River in far northern Douglas County. Now, however, it empties into the southern side of the reservoir itself, just west of Santa Fe Drive and within the boundaries of Chatfield State Park. The Chatfield Storage Reallocation Project, scheduled to start in fall, 2017, will add capacity to Chatfield Reservoir and raise its level about 12 feet. This higher reservoir level will cause the mouth of the creek to move about 7,000 feet further upstream. As part of the expansion project, a mitigation project will also be undertaken to deal with increased sediment deposition and channel erosion along Plum Creek caused by increased urban runoff.

Acequia is an unincorporated community located in Douglas County, Colorado, United States.

Ken Caryl, commonly known as Ken Caryl Ranch, is an unincorporated community and a census-designated place (CDP) located in and governed by Jefferson County, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The population of the Ken Caryl CDP was 33,811 at the United States Census 2020. The Ken Caryl Ranch Metropolitan District and the Ken Caryl Ranch Water District provide services. The Littleton post office (Zip code 80127) serves the area.