Montgomery Reservoir
The reservoir and dam viewed from Highway 9
(North Star Mountain in the background)
Montgomery Reservoir is located in Colorado
Montgomery Reservoir
Montgomery Reservoir
Montgomery Reservoir
LocationPark County, Colorado
Coordinates39°21′20″N 106°04′33″W / 39.35556°N 106.07583°W / 39.35556; -106.07583[1]
Primary inflowsMiddle Fork South Platte River
Hoosier Tunnel
Primary outflowsBlue River Pipeline
Basin countriesUnited States
Managing agencyWater Resources Department, Colorado Springs Utilities
Built1957[2]
Surface area95 acres (38 hectares)[3]
Water volume5,088 acre-feet (6,276,000 cubic metres)[4]
Surface elevation10,873 feet (3,314 meters)[1]
Frozenin winter

Montgomery Reservoir lies high in Colorado's Mosquito Range near Hoosier Pass a few miles north of Alma, Colorado. The reservoir sits at an altitude of 10,873 feet (3,314 meters).[1] It is owned by Colorado Springs Utilities and delivers water to Colorado Springs, Colorado for municipal use.[4] Built in 1957,[2] the reservoir stores water from the Middle Fork South Platte River and from a tunnel that brings water from the Blue River on the west side of the continental divide.

Transbasin diversion

Most of the water entering the reservoir comes through the Hoosier Tunnel which collects water from the Blue River watershed on the west side of the continental divide and conveys it to the east side, an instance of a transbasin diversion.[5] Because the reservoir lies near the top of the headwaters of the Middle Fork South Platte River, the watershed above the dam is rather small — only 7.7 square miles (20 square kilometers) in size,[6] so its catchment basin is limited. Thus the chief source of the lake's water is the Hoosier Tunnel.

The reservoir is drained by the Blue River Pipeline, a 70-mile (110-kilometer) long pipeline that flows by gravity to the Colorado Springs Utilities-owned North and South Catamount reservoirs on the slopes of Pikes Peak. From there, the water is treated and delivered to municipal water customers in Colorado Springs.[6]

Dam

Montgomery Dam[7] is a rockfill structure. It is approximately 1,900 feet (580 meters) long and 113 feet (34 meters) high. When it was built, the dam was sealed with an asphalt concrete facing.[2]

References

  1. 1 2 3 "Montgomery Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
  2. 1 2 3 Hickey, M. E. (1971). Asphaltic concrete canal lining and dam facing. Denver, Colo.: Applied Sciences Branch, Division of General Research, Engineering and Research Center, U.S. Dept. of the Interior, Bureau of Reclamation. hdl:2027/uc1.31210025039171.
  3. ↑ "Exhibit A: Scope Of Work, Montgomery Reservoir improvements". Doc Player. Retrieved 2020-07-18.
  4. 1 2 Black & Veatch (1996). Water resource plan for Colorado Springs Utilities (PDF). [Colorado Springs]: Water Resources Department, Colorado Springs Utilities.
  5. ↑ "Hoosier Tunnel East Portal and Montgomery Reservoir, Colorado". The Center for Land Use Interpretation. Retrieved 2020-07-18.
  6. 1 2 "Statement of work: Technical feasibility and alternatives analysis for Montgomery Dam upstream face rehabilitation" (PDF). Rocky Mountain E-Purchasing System. Retrieved 2020-07-18.
  7. ↑ "Montgomery Dam". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
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