C153664 Engineering report - Laserfiche WebLink

Home Browse Search

I I I I I I I I I I I I I I I I I I I EXHIBIT 1 Oescnptlon cf Sourtlem Water Supply PrCject P:peline T::e Souc.~ec:1 'Vater Sc.:;:piy PrOject P!pelir.e IL'1e'Pipeline') consists of ",-oCJ:caucr.s ~o t..~e e:dstlng Caner Lai<e Outlet Works and tr.e first 2.300 feet of the St. Vrain Supply Car.al together '''lth the construction of 34 rrules of pressuJ"'.zed. bUrled pipeline and vanous ...a.!ve and '..ent fac:llues. The Pipeline ....111 convey untreated water fror.! the Caner Lake Reseryc;c. :ocated :n Lar.mer County. to various Participant delivery pOInts located in Ldr.r::er. 2c'c:cer, ar.d Adams Countles. The location of the Pipeline and PartiCipant delivery pomts a.:e shc.'"'1 on L'1e attached map. The modiflcatlons to the Carter Lake Outlet Works and St. Vrain Supply Canal. located at ar.d below Carter Lake Dam :-10. I. include raising the walls and covering the eldsUng sulling bas;n and Parshall Flume. The modifications also include replacing the first 2.300 feet of the trapezoidal. shaped canal ....ith a covered rectangular section. constructing an emergency splllway on the canal. and constructing a turnout structure for the 34-rrule bur1ed pipeline. The route for the 34-rrule bur1ed pipeline begins at the turnout structure. constructed as part of the modiflcations to the St. Vrain Supply Canal. and proceeds east and south for approximately 3 rrules. The route continues south for another 3 mlles (leaVing Ldr~'!ler County and entering Boulder County) unUl the route abuts the r1ght-of-way for an eldSting electI1cal transmission line. At this pOint. the route turns southeast and is parallel to the nght-of-way for the electrical transrrussion line. The route sk1rts Table Top ~ountain. diverges from t..'1e electI1cal transmission line. and crosses over Table Top ~ountain at its south end near an abandoned gravel mine approximately 3 miles southeast of the route's inJtial abutting to the electI1cal transmission line. From thIS location. the pipeline continues south for another 4 rrules. pasSing west of the Longmont urban area to a pOint Just south of St. Vraln Creek. The route turns southeast for somewhat more than 1 mile. passing between St. Vrain Creek ;:nd the Longmont Airport. The route then continues south and east for approximately 3 rrules to a pOint '.4-rrule east of the intersection between Airport Road and the Diagonal Highway. The route then turns east for 2 miles unUlit again abuts the right-of-way for an existing electrical transmission line which the route parallels to the south for nearly 4 rrules. South of Lookout Road. the route diverges from the electrical transmtsslon line and continues south for a distance of about 3 miles. The route then turns east for 3 miles to the Boulder-Weld County Line. The route follows the Boulder-Weld County LIne south for 2 m1Ies before turning southeast for 3 miles to the Broomfield dellvery pOint which Ues in Adams County. The Plpellne W1l1 also include vaI10us appurtenant facilities. Some of the more sigruflcant appurtenances Include a master metenng facility near the turnout structure for the 34-rrule buned pipellne. a m~fnl1r'\e valve near Table Top Mountain. another mainline valve near the Diagonal Highway. and a flow control structure for Broomfield \4-mile south of the existing Ene Water Treatment Plant. Other facilities. such as air-vacuum release valves and blowoff valves will be prOVided along the length of the pipeline. [n addition. proVisions for connectlons to the Pipeline will be proVided at Participant dellvery locations for future connections by Participants other than Broomfield.