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It is recommendcd that a 54-inch Rep with headwall and 66 inches of headwater he placed across Eaton Avenue on the west side of Second Street to intercept flow in the channel between Golden Avenue and Eaton Avenue. Also a 36-inch Rep culvert with 4-foot of headwater should be placed , diagonally across Eatlln Avenue and Second Street to intercept flow at the northeast side of the intersection and convcy it tuthe soutllwest eornerofthe intersection. 11 8. M prcviously indicated,the existing channel on the west side ofSec ondStreet between Golden Avenue and Eaton Avenue is poorly developed and in very poor condition. This channel should be riprap lined and constructed with a 2-foot bottom widtb and flow deptll of approximately 3 feet as indicated on Figure 4 in Appendix A. Approximately 300 feet of this channel lining is required. 9. Existing structure no. 28 (24.inch CMP with 24 inches of headwater) is scvcrclyundersizcd to adequately convey flow from the lO-year design storm. This structure is located on the west side of Second Street andcro,ses Carr Avenue. This culvert is also in a location, as previously descrihed above. which has severe consequences on the flooding which occurs in the downtown district. A review of the existing drainage facilities along Seeond Street between Eaton Avenue and Bennett Avenue led to thc recommendation that an outfalllinc be constructed in Second Street between Eaton Avenue and Bennett Avenue. This outfall line will convey flow intercepted from the open channel at Eaton Avenue underground to the storm sewer system at Bennett Avenlle. It is reCommended that the outfall Hne be 42-inch RCP installed at a slope of approximately 5%. In addition, small swales shall be con,tructed on each ,iue of Second Street between Eatoll Avenue and Bennett Avenue. Inlets sl10uld bc installed in these swales at Carr Avenue, one on each side of Second Street. 600 lineal feet of 42-inch RCP outfall will be required. 12. VI-9 , 10. Existing structure no. 95 (16-ineh CMP with 24 inches of headwater) is inadequate to convey runoff from the to-year design storm. ft IS recommended that this culvert be replaccd with a 24-inch CMP with 30 inches of headwater. Existing structure no. 67,68 and 36 were originally intended to convey runoff from the westerly portion of the Second Street Tributary around the courthouse and into tlle Bennett Avenue storm sewer system. These facilitiM are in very poor condition, all outlets cannot be located and discuss ions with loeal resident~ indicate that they may not function at all. It is recommendcd that these existing stmctures be replaced a, follows: A new inlet should be installed in the area of the inlet to existingstfUcture no. 67. This inlet should be sized to intercept all overlot flow which reaches it. From this inlet a new 36-inch RCP storm sewcr should be imaalled which runs north of the courthouse to First Strect then south to Bennett A venue. At the intersection of First Street and Bennett Avenue. this pipc will be conneeted to the new Bennell Avenue storm sewer system. Approximately 300 lineal feet of 36-inch RCPis required. The existing Bennett Avenue storm sewer system between first Street and Third Street consists primarily of small grated inlets with small (less than 24.inch CMP) Storm sewer piping. Discussions with city staff indicatc that the storm sewer piping has severely deteriorated. Also. inlet capacity appears inadequate even though large amounts of potential runoff will be interceptcd by the recommendcd upstream improvements. In addition, existing inlet locations do not appear suitable whcn the futurc Bennett Avenue slrectscapc project tS undertaken. 'Ihe ioilowing improvements 10 the Bennett Avenue storm scwer system within the Second Street Tributary arc recommcnded: VI.lU