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2. Location: Behind property at 2381 Todd St. <br /> Nature of Problem: Slotted manhole inlet (S2W3 -5053) to piped system at the <br /> bottom of a natural draw has plugged with eroded sediment and debris during <br /> heavy rains causing flooding onto this property. Plugging and flooding have <br /> increased in severity recently due to additional runoff in the draw created by <br /> development of Park Hills Subdivision and the extension of Griener St. up slope <br /> fronz.4.1a inlet. - Although the privately engineered drainage for this sirbelivitiOh <br /> crosses this draw and ties into the piped system at this inlet, it does not make provi- <br /> sion to intercept and collect the additional surface flow introduced to the draw as a <br /> result of the subdivision development. <br /> Recommended Solution: Since the problematic inlet is the point where the new <br /> system is designed to connect with existing pipe, modify the design of this inlet <br /> structure to allow collection of the increased surface runoff flowing down the draw. <br /> Alternative would be to construct a catchment structure up stream from the <br /> existing inlet, at the point where the new storm line crosses the draw. <br /> Status: Engineering has designed a modification of the inlet. Maintenance has <br /> opted to postpone construction since ample vegetation had returned to the drainage <br /> area to considerably reduce surface runoff last winter. <br /> 3. Location: Garfield St. to Cleveland St. drainage connection <br /> Nature of Problem: Recently constructed drainage system originating on Morning <br /> View Lp. above Garfield St. cul -de -sac outlets to a natural creek bed behind <br /> property at 2525 Garfield St. (S2W2- 5939). This creek flows across the undevel- <br /> oped right -of -way of W 25th Ave. and through several developed residential lots <br /> that have incorporated it as an integral part of their landscaping. The creek finally <br /> inlets back to the piped system near the intersection of Cleveland St. and W 24th <br /> Ave. (S2W2- 6165). During heavy storms, additional flow introduced to the creek <br /> from this upstream development causes erosion to the creek banks along the <br /> developed residential lots. Property owners along Cleveland St. near the inlet at W <br /> 24th Ave. are concerned that continued upstream development, especially any <br /> improvement of W 25th Ave. and the associated residential construction, will <br /> further overload the creek's capacity and wash out what is an important amenity to <br /> their property. <br /> Recommended Solution: Conduct flow analysis of existing 10" piped system along <br /> Cleveland St. south of W 24th Ave. that roughly parallels the creek to determine <br /> capacity for additional flow. Determine the feasibility of connecting any new storm <br /> facilities associated with future improvement of W 25th Ave. to the Cleveland St. <br /> system in order to bypass the section of creek that runs through the residential lots. <br /> This may require upsizing the existing 10" pipe system along Cleveland St. between <br /> W 25th and W 24th Ayes. up to the next existing manhole north of 24th. Property <br /> owners have already reported this system to surcharge through the manholes <br /> during heavy storms. From the existing manhole north of 24th Ave. a pipe <br /> (possibly 24 ") should be installed continuing north up Cleveland St. where no pipe <br /> aplist.upd 7/95 bne 2 <br />