The Fryingpan

The Fryingpan-Arkansas Project Collection System
The North and South Side Collection Systems are located at approximately 10,000 feet elevation. The facilities are designed to divert and carry water from the Fryingpan and Roaring Fork River Basins to the inlet portal of the Charles H. Boustead Tunnel. The tunnel transports water form the collection system through the Continental Divide to the Arkansas River Basin. The North Side Collection is designed to divert, collect, and transport an average of 18,400 acre-feet of water annually through facilities of the Mormon, Carter, Ivanhoe, Granite, Lily Pad, North, Cunningham, Middle Cunningham, and South Cunningham Creeks. The South Side Collection System is designed to transport an average of 50,800 acre-feet of project water annually from the Fryingpan and Roaring Fork River Basins. Facilities located on Hunter, Midway, and No Name Creeks will collect and divert water from Sawyer and Chapman Creeks, the South Fork of the Fryingpan River, and the main stem of the Fryingpan River downstream of Marten Creek.
North Side Collection System Carter Tunnel is the first collection tunnel on the North Side Collection System. Water is diverted into the tunnel by Carter Diversion Dam through the 300-foot, 42-inch Carter Feeder Conduit to the inlet of the Carter Tunnel. The North Fork Diversion Dam is a drop-inlet structure that diverts North Fork Creek water into the Carter Tunnel by the 280-foot-long North Fork Feeder Conduit. Carter Tunnel is 0.54 mile long and has an 8-foot horseshoe cross-section with a capacity of 130 cfs. Water from Carter Tunnel flows to the Mormon Conduit. Mormon Tunnel exists on Mormon Creek. The Mormon Feeder Conduit connects the Mormon Creek diversion structure to the intake portal of Morman Tunnel. The conduit is a 240-foot-long structure, including a partial flume measuring device. The tunnel is 1.4 miles long, with an 8.25 foot horseshoe shaped section having a capacity of 190 cfs. The water from Mormon Tunnel flows to the Cunningham Tunnel. The North Cunningham, Middle Cunningham, and South Cunningham diversion structures are connected to the Cunningham Conduit by feeder conduits which extend to Cunningham Tunnel. The length of the three feeder conduits is 2,700 feet, and the Cunningham Conduit is 4,170 feet long. Cunningham Tunnel is 2.86 miles long and has a horseshoe shape of two sizes: 8.75 and 7.5 feet. The capacity is 270 cfs. The Cunningham Tunnel flows into the Nast Tunnel. Ivanhoe Diversion Dam diverts water from Ivanhoe Creek and the Cunningham Tunnel through the Ivanhoe Creek crossing into the inlet of Nast Tunnel. Granite Diversion Dam diverts water through the Granite Siphon to the Granite Adit, which drops the flow into the Nast Tunnel. Lily Pad Diversion Dam drops the flow into Nast Tunnel. Nast Tunnel is 3 miles long, with a circular-shaped section with two diameters: 7.67 and 9.33 feet. The capacity of the tunnel is 360 cfs. The Fryingpan Conduit, which is 2,481 feet long and 84 inches is diameter conveys flows to the Boustead Tunnel.		South Side Collection System Hunter Tunnel is 7.6 miles long. It transport the flows diverted at No Name, Midway, and Hunter Creeks to Chapman Gulch at the Chapman Diversion Dam. The capacity ranges form 90 cfs at No Name Creek - the point of the beginning of the South Side Collection System--to Midway Creek with 270 cfs at Chapman Gulch on the Chapman diversion site. No Name, Midway, and the Hunter Creek diversion structures are all similar. Each has a sluice gate for bypassing all stream flow when water is not being diverted. When diversions are being made, minimum flow is released through a bypass to maintain the stream. A side overflow section provides for passing flood flows. Flows are diverted through a short flume section to a shaft that drops the water into the Hunter Tunnel. Hunter Tunnel is a semi-horseshoe-shaped structure with two sizes: 8.5 and 7.33 feet. The Sawyer diversion drop inlet diverts water from Sawyer Lake into Sawyer Feeder Conduit (3,098 feet in length), and drops the water at Chapman Gulch. The water then flows to Chapman Diversion Dam, with the flow from Hunter Tunnel, to be diverted into Chapman Tunnel. Chapman Tunnel is a 2.8 mile long, seven foot horseshoe shaped structure, with a capacity of 300 cfs. The South Fork Diversion Dam diverts water from South Fork Creek to the South Fork Siphon, where it combines with the flow from South Fork Creek and is conveyed by the South Fork Feeder Conduit to the inlet of the South Fork Tunnel. South Fork Tunnel is a 3.1 mile long, 8 foot horseshoe-shaped section, and has a capacity of 450 cfs. The tunnel discharges water into the Boustead Tunnel. Fryingpan Diversion Dam diverts water into the Fryingpan Siphon, under the Fryingpan River, to the inlet structure of the Boustead Tunnel.