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<br />I f~ l"~~,~ OLSSO N <br /> <br />ASSOCIATES <br />143 Union Blvd. Suite 700 Lakewood, CO 80228 720-962-6072 <br /> <br /> <br />AL.AM~O.S~A RJVER <br />DIV'E,RSIO,N STRU.CTU.RE INVENTO,RY' <br /> <br />Structure Name: Terrace Main Ditch <br /> <br />Reported By: Jason Mead <br /> <br />Date: <br /> <br />5/17/06 <br /> <br />Time: <br /> <br />8:00 a.m. <br /> <br />Directions: <br /> <br />From Capulin, head west on State Route 15, go approximately 2 miles and turn <br />north on S.R. 15, go north approximately 4 miles and turn west on County Road <br />BB, go west on C.R. BB approximately 2 miles and turn south on to an access <br />road along the concrete lined ditch and follow it to the headgate. <br />Latitude Longitude Section Township <br />N37019'58.0" W106012'51.4" SW1/4S28 T36N <br /> <br />Range <br />R7E <br /> <br />Location: <br /> <br />Type: <br /> <br />Manually operated 5.5' wide steel slide gate. <br /> <br />Good D No D Reason Submerged: <br />Condition: Fair ~ Submerged: IV! High River Flow <br />Poor DYes LC:,J <br /> <br />Repair(s) Needed: There is significant concrete spalling, and one cell of the headgate is no longer <br />diverting water. The structure is performing well, but will eventually have to be replaced. In the <br />meantime the spalling concrete needs to be patched. <br /> <br />Upstream Configuration: There is a concrete diversion dam that diverts flow along the river to the <br />headgate, which sits along the east bank of the river. <br /> <br />Comments: There are two openings in the headgate, and there is a slide gate in one of the <br />openings and stop boards in the other to prevent river flow from entering. There is a pair of old radial <br />gates still attached to the structure that were replaced by the newer slide gate and the stop boards. <br />Because of the acidity of the water along the Alamosa River the old radial gates rusted out and had <br />to be replaced. The downstream flow measurement device is a rated section with a Stevens <br />Recorder. Downstream of the flow measurement device the ditch is lined with concrete. According <br />to the water commissioner, the owners of this ditch already have three loans from the CWCB. <br /> <br />Estimated Range of Cost: Low <br /> <br />F:\Projects\20060507\Documents\Reports\Alamosa\lnventory Forms\Terrace Main Ditch.doc <br /> <br />OA No. 2-2006-0507 <br />