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CEAP Skunk Creek Trail and Environmental Enhancements - Broadway to US 36CITY OF BOULDER INFORMATION ITEM FOR: ~.. TRANSPORTATION ADVISORY BOARD WATER RESOURCES ADVISORY BOARD PLANNING BOARD PARKS AND RECREATION ADVISORY BOARD OPEN SPACE BOARD OF TRUSTEES GREENWAYS ADVISORY COMMITTEE AGENDA ITEM MEETING DATE: October 17, 2001 ~~ ti.~.. SUBJECT: Commwuty and Environmental Assessment Process (CEAP) Skunk Creek Trail and Environmental Enhancements - Broadwa to US 36 REQUESTING DEPARTMENT: Pubhc Works Department - Utilmes Division Ned Williams, Assistant Director of Public Works for Utilrt~es Bob Hazberg, Utilities Projects Coordinator Anne Noble, Intenm Greenways Coordinator BOARD ACTION REQUESTED: Staff requests boazd members to review and provide comments on the Skunk Creek CEAP, and requests the Greenways Advisory Committee to consider approval of the CEAP durmg a public heanng on October 17, 2001 At this time the Greenways Advisory Committee does not have approval authority for CEAPs, but is expected to receive that authonty from CIIy Council If approval authonty for CEAPs is not granted to the Greenways Advisory Committee, the CEAP will be taken to the Transportation Advisory Boazd for publ~c heanng and approval at rts meeting on November 11, 2001 Puroose• Information Item and Greenways Advisory Committee (GAC) Agenda Item Staff is requestmg boazd members to review the Skunk Creek CEAP and provide comments to your Greenways Advisory Committee representahve or Nancy Stemberger at (303) 441-4111 The Greenways Advisory Commmee meehng on October 17, 2001, will include a public heanng and considerahon of the CEAP for approval Baclc¢round• The Skunk Creek Trail and Environmental Enhancement pro~ect mvolves construchon of a mult~-use path, pedestnan underpasses at 27`~' Way and potentially at Ivloorhead Avenue, flood mitrgatron improvements, water qual~ty enhancements, and stream and npanan habitat improvements The project is located along Skunk Creek between the recently completed ~ Broadway underpass and the existing underpass at the US 36 southbound on-ramp. The pro~ect has been identified m the Greenways Master Plan (GMP), the Transportahon Master Plan (TMP), and the Comprehensive Drainage Utility Master Plan (CDUMP). The Greenways program manages sueams for mulhple ob~echves, therefore the pro~ect meets multiple city goals as described below. ~ Transportanon: T'he Skunk Creek pro~ect from Broadway to US 36 will complete an important ""'~ off-street trail connecrion between two existing underpasses. Tlus link will provide a conhnuous trail segment along Skunk Creek allowing users to avoid travehng through pazkmg lots or on Basehne Road neaz the intersection with Broadway. In addrtion, the proposed underpass at 27~' Way and potential future underpass at Moorhead will facilitate pedestnan and bicycle travel between the Williams Village student housing, Creek S~de Apartments, Brookside Apartments, and the commercial azeas at Basemaz and along Moorhead. The underpass at 27~' Way would be of a higher pnority than the one at Moorhead Avenue based on traffic volumes and the relative di~culty for pedestnans and bicyclists to cross these roadways At-grade pedestnan facilities for crossing 27~' Way and Moorhead Avenue aze being proposed as an interim solution wh~le fundmg for one or both underpasses is bemg secured. Flood Conuol The existing box culverts at both 27`~' Way and at Moorhead aze sufficient for accommodating the 100-yeaz dischazge of 1,350 cubic feet per second (cfs) assuming 0% blockage However, because of the vertical wall sepazaung the cells in the existmg box culverts, partial b3ockage by debns is hkely Replacement of the box culverts wrth underpasses would improve the conveyance capacity to accommodate lazger events and would have a factor of safety for debns blockage. In addition, the existing Skunk Creek channel does not have adequate capac~ty to convey the full 100-yeaz flood, resulting in flooding along both the north and south overbanks of the creek No structures in the pro~ect area aze currently m the high hazard zone, but Creek Side apartments and the caz wash aze both withm the conveyance zone on the city's ,,.,,~ regulatory mappmg By widening the stream channel between Broadway and 27~' Way and „ry replacing the exisring box culverts wrth underpasses, the Skunk Creek project will increase the conveyance capacrty of the dramageway for floodwaters If feasible, the design will attempt to contain the 100-year flood withm the stream corridor to prevent mundahon of existmg bu~ldings at Basemaz and Creek Side apartments Contamment of 100-yeaz floodwaters in the segment between Moorhead and US 36 is not possible without significant mod~fications of the highway or addition of a new conveyance structure Flood improvements at US 36 are beyond the scope of the current project Habrtat Improvements The exishng npanan and aquatic habrtat m the pro~ect area is highly impacted by channehzation and the surrounding urbamzed envuonment The proposed pro~ect will have temporary impacts on sechons of the stream channel but will include habitat enhancements to improve the functions and values of the sueam comdor beyond rts current condrtion In addmon, impacts to regulatory wetland azeas will be mitigated on-site at a ratio of 2• 1 Areas with existing good quality stream morphology and tugh quahty vegetation structure will be avoided to the extent possible withm the constramts of the project. Proposed habrtat improvements mclude removal of diseased and non-native trees, control of noxious weeds, mcreasmg vegetation structure by thinnmg shrubs and planting nat~ve trees and grasses, and potentially removing the gabions and widemng the stream channel downstream of Moorhead. Water Oualiri: Enhancements for water quality include addmg a buffer stnp to treat pazlnng lot runoff; planting of native vegetation along the stream banks to improve vegetative bank stabihty "*~ and minim~ze erosion and sedimentat~on into the stream, and cleanup of the trash that currently ~'' , r accumulates at the box culverts. It is expected that mcreased use of the azea m conjunction with the proposed underpass at 27~' Way and the potential future underpass at Moorhead will r^- discourage trash dumpmg and reduce debris accumulation 1,.., Recreation: The multi-use path will be available for a variety of recreahonal achvihes, includmg bicyclmg, rollerblading, running, walking, }uking, and passive recreation. The Greenways trail system serves as a recreational facility m addition to an alternative transportation comdor. Analvsis• The pro~ect alternatives included consideration of several scales of action The lazgest scale mvolved looking beyond the project azea boundaries, includmg connections to other transportat~on facilrties, azea-wide flood concems, water qualiry issues within the Skunk Creek basm, and habrtat hmrtarions of the utban envuonment. Please ref~r to the CEAP document m Attachment A for a complete description of the alternatives considered The preferred pro~ect altemative is to: maintam the current alignment of Skunk Creek, replace the existing box culvert under 27'" Way with a new structure properly designed as a mulh-use path underpass and flood conveyance structure, and; construct a 10-ft wide concrete multi-use path along the creek. An addmonal underpass at Moorhead is also bemg considered as a potential future improvement, wrth at-grade pedestnan facilrties bemg constructed as an intenm solution while funding for one or both underpasses is being secured Action Reauested: Staff requests boazd members to review and provide comments on the CEAP and requests the ~,,,, Greenways Advisory Committee to consider approval of the CEAP for the Skunk Creek Trail ~ and Environmental Enhancements - Broadway to US 36 Attachment A. Commumty and Environmental Assessment Process (CEAP) Skunk Creek Trail and Environmental Enhancements - Broadway to US 36 Attachment B Development Review Results and Comments on the CEAP. The attached CEAP report has been updated to reflect these comments, m addrtion to other mput from staff, consultants, property owners, and the public. ~ ~... ATTACHMENT A ~- COMMUNITY AND ENVIRONMENTAL ASSESSMENT PROCESS Skunk Creek Trail and Environmental Enhancements Broadway to US 36 September 13, 2001 1. Description and location of the project: The Skunk Creek Trail and Environmental Enhancement pro~ect mvolves construction of a multi-use path, pedestnan underpasses at 27~' Way and potentially at Moorhead Avenue, flood mitigation improvements, water quality enhancements, and stream and npanan habitat improvements. The pro~ect is located along Skunk Creek between the recently completed Broadway underpass and the existing underpass at the US 36 southbound on-ramp See vicmity map for pro~ect locahon 2. Background, purpose and need for the project: This pro~ect has been idenhfied m the Greenways Master Plan (GMP), the Transportahon Master Plan (TMP), and the Comprehensive Drainage Util~ty Master Plan (CDUMP) The Greenways program manages streams for mulhple ob~ectrves, therefore the pro~ect meets mulriple crty goals ~ as descnbed below. Transportation. The Skunk Creek pro~ect from Broadway to US 36 will complete an important off-street trail connection between two exishng underpasses This hnk will provide a conhnuous trail segment along Skunk Creek allowing users to avoid traveling through pazking lots or on Baseline Road neaz the mtersechon with Broadway In add~tion, the proposed underpass at 27`~ Way and potenrial future underpass at Moorhead will facilrtate pedestnan and b~cycle travel between the Williams Village student housing, Creek Side Apartments, Brookside Apartments, and the commercial azeas at Basemaz and along Moorhead The underpass at 27~' Way would be of a higher prionty than the one at Moorhead Avenue based on traffic volumes and the relarive difficulty for pedestnans and bicychsts to cross these roadways. At-grade pedestnan fac~lities for crossing 27~' Way and Moorhead Avenue aze bemg proposed as an mterim solut~on while fundmg for one or both underpasses is bemg secured. Flood Control. The ex~sting box culverts at both 27`~ Way and at Moorhead aze sufficient for accommodatmg the 100-yeaz dischazge of 1,350 cubic feet per second (cfs) assummg 0% blockage. However, because of the vertical wall sepazating the cells in the existmg box culverts, partial blockage by debns is likely. Replacement of the box culverts wrth underpasses would improve the conveyance capacity to accommodate lazger events and would have a factor of safety ... w... for debns blockage. In addrt~on, the exishng Skunk Creek channel does not have adequate ~w capac~ty to convey the full 100-yeaz flood, resulting in floodmg along both the north and south ~ overbanks of the creek. No structures m the project area aze currently in the h~gh hazazd zone, but Creek Side apartments and the car wash aze both wrthin the conveyance zone on the c~ty's regulatory mappmg By widening the stream channel between Broadway and 27~' Way and replacmg the existing box culverts with underpasses, the Skunk Creek project will mcrease the conveyance capacity of the drainageway for floodwaters. If feasible, the design w~ll attempt to contazn the 100-year flood within the stream corridor to prevent inundahon of existing buildmgs at Basemaz and Creek Side aparhnents. Containment of 100-yeaz floodwaters m the segment between Moorhead and US 36 ~s not possible wrthout sigmficant modifications of the highway or addrtion of a new conveyance structure Flood improvements at US 36 aze beyond the scope of the current project. Habrtat Improvements The existing nparian and aquatic habitat m the pro~ect area is highly impacted by channelization and the surroundmg urbanized environment. The proposed pro~ect w~ll have temporary impacts on sections of the stream channel but will include habitat enhancements to improve the functions and values of the sueam corridor beyond rts current condition In addrtion, impacts to regulatory wetland azeas will be mrtigated on-site at a ratio of 2.1 Areas with exishng good quality stream morphology and high quality vegetahon structure will be avoided to the extent possible withm the constramts of the project. Proposed hab~tat improvements mclude removal of diseased and non-natrve trees, control of noxious weeds, mcreasmg vegetat~on structure by thmmng shrubs and planring nahve trees and grasses, and ~ potentially removmg the gabions and widenmg the stream channel downstream of Moorhead. ~, W ater Oualrtv Enhancements for water quality mclude addmg a buffer stnp to treat pazkmg lot runoff, planhng of nahve vegetahon along the stream banks to improve vegetative bank stability and mmimize erosion and sedimentat~on mto the stream, and cleanup of the trash that currently accumulates at the box culverts It is expected that mcreased use of the azea m con~unct~on w~th the proposed underpass at 27w Way and the potenhal future underpass at Moorhead w~ll discourage trash dumpmg and reduce debns accumulation Recreahon The mulri-use path will be ava~lable for a vaneTy of recreahonal acrivrties, mcludmg bicychng, rollerblading, runnmg, wallcing, hiking, and passrve recreahon The Greenways trail system serves as a recreational facility m add~tion to an altemative transportahon comdor. 3. Description of project alternatives and summary of major issues: The pro~ect alternatives included wns~derahon of several scales of acUOn The largest scale mvolved looking beyond the pro~ect azea boundaries, includmg connections to other transportahon facilihes, azea-wide flood concerns, water quality issues withm the Skunk Creek basm, and habitat limitat~ons of the urban envuonment. Specific altematrves considered at the large scale were. ~ 2 _,~ ~- ~- • No Achon. 11us altemative was re~ected due to the idenrified need to complete the trail connection between the existing underpass facilities at Broadway and the US 36 southbound on-ramp. The additional investment in this trail segment will greatly enhance the usabil~ty and value of the exisring facilities. Also, the pro~ect will improve the capacity of the existing draznageway for conveyance of floodwaters. • Routing of the trail and/or stream Lazge-scale opt~ons for locahng the trail and/or stream were considered. a Re-Establish Historic Alignment Prior to the construction of Moorhead Avenue, Skunk Creek flowed northeast through the azea which is now a restaurant and hquor store. Re-establishment of the previous stream alignment is not possible due to exishng development. b. New Alignment Flood issues at US 36 are primanly related to insufficient culvert sizes under the highway To mrtigate these flood problems, re-routing of the stteam and/or construction of an overflow channel to the north were also considered as lazge- scale pro~ect alternatives. Adequate azea for construction of a flood control channel does not exist in this locahon. Construct~on of an addrtional culvert undemeath the existing bike path on the south side of the highway overpass may be a future option to consider. Regazding the trail alignment, other alternatives for an east-west multi-use path, including rouhng the trail away from the creek, were considered Due to the existing level of development in the azea, no other acceptable alignments could be identified. Addrtionally, a smgle underpass that would diagonally cross both y roadways at the intersechon of 27th Way and Moorhead was considered Due to significant development on the north side of Moorhead Avenue mcluding access dnves, buildmgs, and landscapmg, there is not enough azea available for a multi-use path Tlus alternative was rejected due to space hmitat~ons c Follow Current Stream Alignment. The most direct way to connect the existing Preferted ~derpasses is to follow Skunk Creek, wh~ch also allows the opportumty to provide Alrematrve add~tional flood conveyance, water qual~ty enhancements, and hab~tat improvements as part of the project Assuming that Skunk Creek will remam m its cunent location and the trail will follow the stream, the following altemahves were considered at the pro~ect scale (note that the numbers correspond to the attached drawmgs): Modification of the existing box culverts to function as mulh-use trail underpasses This altemative was attractrve due to a potenrial cost savings by not having to replace the structures However, the roadway adjusttnents necessary to mcrease the box culvert heights to an acceptable clearance aze also expensive, and aze eshmated to be even more costly than replacmg the culverts with new underpasses. Addrtionally, the existing box culvert under Moorhead Avenue has a bend that would be unamactive to users due to a blind curve. Although rt would be feasible to raise the top of the exishng box culverts to accommodate a r^ v~.. multi-use trail, this alternahve was not considered to be the best design approach ~*-~, 2. Installahon of addrtional underpass cells for the multi-use path only. This altemahve would --/ mvolve keeping the existing box culverts for stormwater conveyance, but constructing one addmonal cell at each box culvert for the mulh-use path The costs involved for adding path- only cells were neazly as high as for complete replacement of the existmg box culverts, and would feel narrow and confining to users. Therefore, this ophon was re~ected. 3 Replacement of one or both of the box culveRs with new underpasses properly designed to meet transportation and flood control ob~ectives. This is the preferred alternatrve The Altemeative ~derpass at 27~' Way would be of a higher pnority than the one at Moorhead Avenue based on uaffic volumes and the relative difficulty for pedestnans and bicychsts to cross these roadways. Wkule a grade-sepazated multi-use path system is prefened, the underpass at Moorhead should be evaluated m terms of a cost-benefit analysis. In addrtion, the ex~stmg box culverts at both 27~' Way and at Moorhead are sufficient for accommodanng the 100- yeaz dischazge of 1,350 cubic feet per second (cfs) assuming 0% blockage However, because of the vertical wall separahng the cells m the existing box culverts, part~al blockage by debns is likely. Replacement of the box culverts with underpasses would improve the conveyance capacity to accommodate lazger events and would have a factor of safety for debns blockage. The top of the new underpasses would match the exishng grade of the roadway so that sigmficant roadway modificahons could be avoided. If constructed, the curved box culvert under Moorhead Avenue would be replaced wrth one straight underpass The exishng double-cell boxes would be replaced wrth a smgle-cell design to mmimize the accumulaUOn of debris and to allow for a more comfortable user expenence ~ ...~, Addrtional considerahons included vanous trail designs, access points, and levels of environmental enhancements as descnbed below. Different trail ahgnments along Skunk Creek were considered. The pazkmg lot and dnveway to Basemar shoppmg center hmrt the available space for a trail along the north side of Skunk Creek west of 27~' Way. On the south side of Skunk Creek, mature trees, extensive landscapmg, and a volleyball court associated with the Creek Side apartment complex hmit the available azea. T'he crty has been workmg wrth both of these property owners to idenrify feas~ble alternatives for this segment of the trail The current design approach is to connect to the ex~stmg trail at the Broadway underpass, route the trail along the edge of the Basemaz pazkmg lot, construct a low water crossmg or bndge over the creek to route the trail to the south side at 27`~ Way for street-grade access, and route the through traffic under 27'~ Way through the north side of a new underpass. In con~unchon w~th pedestnan facility improvements for crossing 27~' Way, the street-grade access would also serve as the mterim trail while fundmg for the 27~' Way underpass ~s being secured The design will attempt to preserve the current minimum width of the Basemaz access dnve and avoid adverse impacts to landscaping along the south bank. Any impacts to the pazking lot at the rear of the Basemaz shopping center will be submitted to Planning staff for a minor modification to the PUD Although sub-standazd trail widths were considered to hmrt impacts, the current ,.-.a r^ design mazntams a 10-ft trail throughout the pro~ect hmits Along Moorhead Avenue the uail ~.... would emerge from the 27~' Way underpass and follow the north side of the creek to the potenhal future Moorhead underpass An access ramp would connect the trazl to the exishng sidewalk and bike lane along the south side of Moorhead Avenue. An at-grade pedestnan crossing for Moorhead Avenue is also bemg proposed. The alternahves for this segment include consideration of the cost-benefit of the Moorhead underpass, and the location of access points. North of Moorhead the trail would follow the west side of the creek, then cross the Moorhead frontage road to connect to the existing underpass at the US 36 southbound on-ramp. The alternatives for this segment include removal of the gabions along the west bank, widemng of the creek, and different ophons for access pomts • Different levels of environmental and aesthetic enhancements were considered. A plaza area was considered for the azea behmd Basemar, which would encourage tenants to open their shops to the creek side of the bmlding to take advantage of the stream environment and pedestnan access. This was not considered feasible due to frequent delrveries and the exishng trash dumpsters. The cost of under-groundmg the overhead utihty lines behind the Basemar shoppmg center is also being evaluated as part of the pro~ect. If under-groundmg is not possible at this hme, installation of condurt will be considered to elimmate future impacts to the path m the event of future under-groundmg Habitat improvements of various types have also been considered. Due to extensive development and the urbanized environment surrounding the pro~ect azea, restorarion of the stream corridor is not possible Instead, habitat enhancements such as removal of diseased and non-nahve trees, control of noxious ~, _ weeds, mcreasmg vegetation structure by ttuiuung shrubs and planting native trees and ~ grasses, and potentially removmg the gabions and widemng the stream channel downstream of Moorhead aze bemg proposed • The Transportahon Engineering group is currently considenng alternatives for improvmg the at-grade pedestnan crossing fac~lities at 27~' Way and Moorhead Avenue for the mtenm penod while funding is being secured for one or both underpasses. 4. Preferred project alternative: The preferred project alternative is to maintain the current ahgnment of Skunk Creek, replace the exishng box culvert under 27`~ Way w~th a new structure properly designed as a mulh-use path underpass and flood conveyance structure, and; construct a 10-fr wide concrete multi-use path along the creek An addmonal underpass at Moorhead is also bemg considered as a potential fuhue improvement, wrth at-grade pedestnan facilities bemg constructed as an mtenm soluhon while fundmg for one or both underpasses is bemg secured 5. Public input to date: There has been publ~c comment on the TMP, the GMP, CDUMP, and the Greenways CIP. In addition, the owners of Basemaz and Creek Side apartments have been mvolved in the discussion of trail and stream comdor options and altematives for the first phase of the project ,.-*, ~ ~ 6. Staff project manager: ~- The Greenways Engmeering Project Manager for this pro~ect is Nancy Steinberger. Other consultants or relevant contacts: Consultants on this pro~ect include: Loris and Associates - structural and traffic engmeenng Love and Associates - hydraulic engineering, flood permittmg Recreahon Engineering and Plamung - trail layout Profess~onal Wetlands Consulting - habitat enhancement, weUand permittmg Goals Assessment: 1. Using the BVCP, describe the primary city goals that the project will help to achieve: General The pro~ect will help to actueve multiple ob~ectives and city goals by combimng transportation, recreation, flood control, habrtat, and aesthetic improvements to the Skunk ~ Creek corndor m the pro~ect area. ~ Communrty Des~gn The Greenways system is an example of a posrtive community design feature. This pro~ect contnbutes to the Greenways program and meets multiple objectives for stream management Faciliries and Services The proposed project mcludes transportahon, flood control, and environmental facilmes Environment The project will enhance the environment of the Skunk Creek comdor m the project azea. Specific improvements include removing nox~ous weeds, plant~ng native vegetation to improve vegetatrve bank stabihty, water qualrty features mcludmg increased buffer vegetat~on along pazkmg lots to reduce pollutant loadmg to the stream, cleanup of the trash and debns, and poss~bly widening of the stream removal of the gabion baskets between the caz wash and the liquor store. Economy The project will increase altemative transportauon access between the Wilhams Village .., ~^ student housmg, Creek Side Apartments, Brookside Apartrnents, and the commercial ~ azeas at Basemaz and along Moorhead. ~ Transportat~on The Skunk Creek project from Broadway to US 36 will complete an important off-street trail connection between two existing underpasses Tlus hnk will provide a contmuous trail segment along Skunk Creek allowing users to avoid travelmg through pazkmg lots or on Baselme Road near the mtersection with Broadway. In addrtion, the proposed underpass at 27`~ Way and potential future underpass at Moorhead will facilrtate pedestrian and bicycle travel between the Wilhams Village student housing, Creek Side Apartments, Brookside Apartments, and the commercial azeas at Basemaz and along Moorhead The mulh-use trail will be maintazned year-round to a transportation standazd Housmg The trail will be adjacent to two aparUnent complexes and will facilitate alternative transportahon to these housing areas, and also to CU's Williams Village student housing Social Concerns and Human Sernces The azea currently has a problem with homeless people loitenng azound the liquor store and occupymg the existing box culverts as shelter Addmonally, numerous achve campsites exist along the Skunk Creek channel behmd Basemaz T'he pro~ect will likely displace these people 2. What are the trade-offs in terms of city policies and goals? Due to the urban nature of the pro~ect azea and the low qualrty habitat that currently exists along Skunk Creek, the pro~ect will be able to have overlap (instead of conflict) between the multiple goals As part of trail and underpass construchon, the impacts to the stream channel and nparian area can be replanted wrth natives and reshaped to improve the functiomng condrtion of the stream. Every attempt will be made to preserve areas of high environmental value To the maximum extent possible, the trail layout will avoid azeas of high vegetative structure, and segments of good stream morphology smce these features aze difficult to replace and take yeazs to re-establish Instead, the trail and stream modifications will impact azeas with more easily replaceable or restorable features, such as azeas wrth non-native plants and poor stream morphology. 3. Is this project referenced in a master plan? If so, what is the context in terms of goals, objectives, larger system plans, etc.? If not, why not? This pro~ect is referenced m the Greenways Master Plan, the Transportation Master Plan, and the Comprehensrve Dramage Utility Master Plan. In terms of lazger system plans, this project ~ ~ completes an important alternarive transportation connechon lmking the Broadway north-south "^R bike route with the Bear Creek trail. Because water quality is not localized, but a funchon of the - basm and the upstream channel, water quahty enhancements in this area (especially the removal of trash and buffer enhancements along pazking lots), would prov~de an important improvement m water quality for Skunk Creek and downstream waters includmg the CU research pazk wetlands, Beaz Creek and Boulder Creek. Due to the urban environment and the predommant use by resistant urban-tolerant wildlife, rt is doubtful that nparian hab~tat improvements w~ll increase the value of the lazger system as a wildlife movement comdor or to support more ecologically important or raze species. 4. How will the project exceed city, state, or federal standards and regulations? Due to sigmficant development in the pro~ect area and other srte constraints there may not be adequate space avazlable to meet ADA slope requirements for the underpass access ramps in all locations The pro~ect will be designed to achieve the lowest feasible slope and to meet ADA reqwrements as much as possible The pro~ect will meet or exceed all other standards and regulations In particulaz, the project will provide enhancements to the stream comdor beyond the requirements for compensatory m~tigahon for the unavoidable impacts from the underpass and uail construchon All necessary permits includmg floodplam and wetland permrts will be obtamed for the pro~ect. Impact Assessment ,,..~ ~ 1. Using the attached checklist, identify the potential impacts of the proposed project or (if applicable) the project alternatives: 8 Community and Environmental Assessment Process Checklist M Project title: Skunk Creek Trail and Environmental Enhancements ~ r^ Broadway to US 36 ~; ~ c `m ~" ~ N a d d A. Natural Areas 1 Disturbance to speaes, communities, habdat, ecosystems~ Y _ Y Y B. Riparian AreaslFloodplains 1 Encroachment upon the 100-year, conveyance or h~gh hazard flood zones~ Y Y Y 2 Disturbance to or fragmentation of a ripanan corndor~ Y Y Y ~~~r ;~ ac-. .. _ ........ . . .._ . . . ~E~,r ~.:r:'~-._ ~.~~i~,'~ti;t,- C. Wetlands ~ E.T Water Quality ~ 1 Impacts to groundwater or stormwater quality~ ___ _ N N_ N_ _ 2 Discharges to the stormwater or sarntary sewer system~ __ N N_ N 3 Potential impacts to streams, ditches, or other water bodies~ N_ _ N_ N 4 Groundwater contamination on site~ N N N "'Ha ~[ . .j ~ aFti~~YV5` s:t°~ ' +~'f I_i±Al~Sl~d4iCC t.muc ia ms+-9°"I~e:R ~~ ~_~i~ ~.~~t .~ . ~ i! 'a'~ -`~..-mFtizyqd S~~9L i ~i.~~~{ ,~ ~g ~ °••.L~d:`_ ~L : ?Lj~~iiF+Vt ~~.n n2 „6xxre ~~ ~ -f x..m~ •~I ~ z ~ ~ ~ ~, y,~ ~ L ~ . 'r~ c v ~ tW ~ w L .. $~i~lEU'~' 'w's,~+~_ .1b a.~&'rt}d2...., `wl4 d:. cI+LV9wh°.~iviu: ~ JR~ -{N.."5uw{~'1 ~ IA m s.i~ .-.°~em`°~ ~q{ _ _ _ _ _ _ F. Air Quality _- --- - --- 1 Impacts to a~r quahty~ N N N . ~'~"~t~d3L"- 7a ~v ~s,a~ ~4~a~°~~.~~p+ `~1 3~:~,~, n~ ~~m ~,~~.~&..r, ~ ~ ;1n.. s ~ ~~§ ~9 4F~~ ' ` ' '~~ -~ ~ _ Y ~Ao- ~ ..._. Y ~ u~e;~:.aelc ~vvn a- „ _ -_- G. Resouroe Conservation 1 Changes in water use~ _ N N N _ 2 Increases in energy use~ N _N N __ 3 Generation of excess waste~ N N N ~'~,. m'^~: .., ws.~--~s~s~m F~.ia, 't ~ 5 '' ` r-r ` ~`~ ~ ' a~ ~ '~ ' ~~ ~Ra ~,~ -, H. CulturallHistor~c Resources 1 a Impacts to a prehistoric or archaeological site~ N N N b Impacts to a budding or structure over fifty years of age~ _ N N N c Impacts to a historic feature of the site~ N N N d Impacts to sipnificant agricultural land~ N N N I. Visual Quality __ '~" 1 a Effects on scenic vistas or pubhc views~ N N N Y = Applicable Page 1 N= Not Applicable Community and Environmental Assessment Process Checklist b Effects on the aesthetics of a site open to public view~ N N N c Effects on views to unique geologic or physical features~ N N N '~'~"^ _~ _ _ E, _ . . ._~~, . J. Safety 1 Health hazards, odors, or radon~ N N N 2 Site hazards~ N - N N : n~ :°.~ - K. Physiolog~cal Well-be~ng 1 Exposure to excessive noise~ N N N 2 Excessive light or glare~ N N N 3 Increase in vibrations? N N N ~^wq°i'aalS~`'w~9kx-~":3 i4r,° n~',.- 4r'~a.v~, ~~~ t,t~ f} §~e~"' ~ '"-~-~` "' ' ~ ' ; ~ U " '~ ~ t3d!"x~°e,-~t' ` w ~ .. ,~ ? ~ '~. ~; ~,z, _ ~ = ~» ,- ' _ F. ~ ~~~ , - L. Services 1 Additional need for a health care/soaal services~ N N N b sanitary sewer services~ N N N c pohce serv+ces? N N N d fire protection~ N N N e recreation or parks facilities~ N N N f libranes~ N N N g transportat~on improvements/traffic mitigation~ N N N h parking~ N N N i affordable housing~ N N N ~ ~ open space/urban open land~ N N N ~ k power or energy use~ N N N I telecommunications~ N N N ^ - e_ _ _ ..=z ~ ~"L°.° N~~YL""' e nn~m~~'<' t 4 iy.ti'.;.i<i +"Srfi4~.j~~...r• -csa ~_~~i - c.....>>~ry x._.}-«_: " `~~" ty °°:`~a`..~S ~r~~•3'~4~"•'.c'°t*'9,m..L-et~wrv4':2~^'}~ „ . 3.ri°^:~ - a'~•'~Xlmkl l ~ di. ~ tl _ ~ rv t a i . . i _ Ti ..,, r ~ . ___ > v.ua »I _, iR~Yiv$il3_L..".._.,. .m _x ~ .. - i . __ _ M• SPecial Populations _ _ _ 1 Effects on a persons with disabilities~ N N N b senior population~ N N N c children~ N N N d restricted income persons~ N N N Y = Applicable Page 2 N= Not Appiicable ~.-. ~ COMMUNITY AND ENVIRONMENTAL ASSESSMENT PROCESS - CHECKLIST Skunk Creek Trail and Environmental Enhancements Broadway to US 36 Note The followeng questtons are a supplement to the CEAP checkkst Only those queshons rnd:cated on the checkltst are answered :n full A. Natural Areas Describe the potenhal for disturbance to or loss of significant species, plant commwuhes, wildhfe habrtats, or ecosystems via any of the activities listed below. (Sigmficant spec~es include any species listed or proposed to be hsted as raze, threatened or endangered on federal, state, COUnty liStS ~- SEE BELOW a. construchon activities b vegetation removal c human or domestic animal encroachment d chemical pollutants (includmg fertilizers, peshcides, herbicides) e behavioral displacement of wildlife species (due to noise from use '"~ achvities) ~ f mtroduchon of non-native plant species m the srte landscapmg g. hydrologic alterahon (groundwater, surface runof~ h. mcreased sedimentahon in any body of water If potential impacts have been identified, please provide the following A descnphon of how the proposed project would avo~d, minimize, or mrt~gate identified impacts. - SEe BELOw A habrtat assessment of the site, mcluding. 1 a hst of plant and animal species and plant communities of special concern found on the site; 2. a wildhfe habitat evaluarion of the site - SEE BELOw Maps of the s~te showmg the location of any Boulder Valley Natural Ecosystem, Boulder County Environmental Conservation Area, or critical wildhfe habrtat - NOT APPLICABLE The pro~ect mvolves construction activrties m and azound the Skunk Creek stream channel. The construction crew will use Best Management Practices as described m the Wetlands Mitigation Guidelines, however some impacts to vegetation and stream morphology will be ,... ~ ~ unavoidable. The project mcludes environmental enhancements for habrtat and water quality ,,~ that exceed the requirements for compensatory mitigatron b. The vegetahon to be removed will be primanly non-natives, and azeas with good vegetative structure will be avoided to the extent possible The overall quality of the wildhfe habrtat will be improved as part of the project. Site landscapmg will be m accordance wuh the Revegetation Rules, and will improve the nahve vegetation and structure Non-nahve plant species will be removed as part of the project. c. Because the pro~ect area is already highly urbazuzed, ~t is not expected that disturbance from humans and domestic azumals will impact the wildlife that currently inhabit the area d. Chemical pollutants will not be part of the project Maintenance of the vegetation after pro~ect completion will be performed by selective mechazucal removal of noxious weed species, wrth limrted use of herbicides. If herbicides aze selected for control, only chemicals certified for use neaz streams will be used. e Although construct~on activities may limit the use of the area by even tolerant species dunng the work achvihes, they aze expected to retum after pro~ect completion It is likely that the resident fauna mclude tolerant urban generalists which are not sensirive to noise or other human disturbances that may be associated w~th trazl use. The environmental enhancements associated with the pro~ect aze not hkely to draw more ewlogically important or sensrtive wildhfe species to the azea due to the surrounding urban uses. f. Only native vegetation will be used in site landscapmg, in accordance w~th the Revegetation Rules g Hydrolog~c alteration will be part of the pro~ect, smce the capacrty of the stream channel and ~ box culvert structures to convey flood waters will be increased The mvert of the stream ""` channel will be lowered to accommodate the increased height of the boxes w~thout requinng extensive roadway modifications. Grade control structures will be added to ensure that ad~ustrnents to the stream channel do not cause instabilrt~es h Sedimentahon will not be increased Water qualrty enhancements such as buffer stnps and improvements m vegetative bank stability will reduce sedimentation to the stream B. Riparian areas/floodplains Descnbe the extent to wtuch the pro~ect w~ll encroach upon the 100-yeaz, conveyance or lugh hazard flood zones - SEe BE[.ow 2. Describe the extent to which the project will encroach upon, disturb, or fragment a nparian comdor - SEE BELOw If potential impacts have been identi5ed, please provide the following. A descnptron of how the proposed project would avoid, mmim~ze, or mmgate ~denhfied impacts. - SEE BELOw 10 v.... • A map showmg the location of any sueams, ditches and other water bodies on or neaz the pro~ect srte. - SEE ATTACHED A map showmg the location of the 100-yeaz flood, conveyance, and high hazard flood zones relahve to the pro~ect site. - SEe ArraCxEu The proposed project lies witkun the 100-yeaz, high hazard, and conveyance zones of Skunk Creek. One of the purposes of the pro~ect is to provide flood mrtigahon by mcreasing the capacity of the stream channel and the box culvert structures under 27`~ Way and Moorhead Ttus project is wrthin the npazian corndor for Skunk Creek, although it is very urban through this area A Greenways Riparian Habitat Assessment was conducted during the summer of 1999. This assessment evaluated the quality of ripanan habrtat along Boulder Creek and all of its tnbutaries through the City of Boulder, mcluding Skunk Creek. Ratings were determmed for the structure of the vegetation, the amount of native vegetahve species and the vanety of b~rd spec~es present Ttus project encompasses two of the Ripazian Habrtat Assessment reaches (reaches 6 and 7) along Skunk Creek. In both of these reaches the ranking for birds was poor The ranking for native species was very poor and poor. However, the vegetative structure m these reaches ranked good and very good. Tlus pro~ect will not compromise the quality of the npazian habitat, and m fact will improve sections of the comdor by removing non-native vegetation, mcreasmg ~ native plants and structural diversity of the vegetation and cleanmg out debns ~ C. WeUands Describe any disturbance to or loss of a wetland on site which will result from the pro~ect - SEE BELOw If potential impacts have been identified, please provide the following• A descnphon of how the proposed pro~ect would avoid, mmim~ze, or mingate identrfied impacts - SEE Be~ow A map showing the location of any wetlands on or neaz the site Idenhfy both those wetlands which are jurisdictional under city code (on the wetlands map m our ordinance) and other wetlands pursuant to federal criteria (defimtional). - SEE ATTACHED The Skunk Creek pro~ect vv~ll impact regulatory wetlands, due to the replacement of the existing box culverts under 27~' Way and potenrially at Moorhead Avenue The quality of the exishng wetland areas is low, and is dominated by weed species The gabions in the sect~on upstream of US 36 lim~t the expression of the wetland area. One goal of the proposed pro~ect is to mcrease ,.~. 4,,. 11 ~ wetland azea and funchon to improve wildlife habrtat and water qualiry. Impacts to wetlands w~ll -- be avoided where possible, and minimized in azeas where activines are required to take place m the stream. The mingation efforts will be on-site and m-kmd, and will exceed the Crty's regulatory requirement of 2.1 The pro~ect also serves as a restoration effort, therefore considerable effort will be devoted to removmg non-native vegetation, native plantings, and improvement of the functiomng of the wetland and npanan azea as wildlife habrtat. D. Geology and soils Describe any a. impacts to umque geologic or physical features b. geologic development constraints or effects to earth condrtions or landshde, erosion, or subsidence c, substanhal changes in topography which will result from the project - No ImrnC'rs The pro~ect will not ~mpact any geologic or phys~cal features Lowenng of the stream mvert may be necessary to mamtam the exisring roadway profiles on 27~' Way and Moorhead Instream grade controls will be used to ensure stability of the stream channel. ,,,,~ E. Water Quality Describe potenhal impacts to groundwater or stormwater quahry which may result from the pro~ect. - No IMPnCTs 2 Descnbe potenhal mcreases m stormwater dischazges which may result from the piOJCCt - NO IMPACTS Descnbe potential water qual~ty impacts to streams, drtches and other water bodies from the project. - No IMrncTs 4 Is there a likelihood of groundwater contammahon from past history on the site or an adjacent site~ - No IMPnCTs The wmpleted project wtll improve water quality by improvmg the filtenng capacrty of the buffer at pazkmg lots, improvmg vegetative bank stabilrty by plantmg nanve nparian spec~es, and providing water quahty features ~ 12 ~ vr,,. Stormwater conveyance will be improved by the pro~ect due to the mcreased flood capaciry of the stream channel and underpasses. Construcnon activihes wrthin and near stream channels have the potenrial to ~mpact water quality. Best Management Practices (City of Boulder Wetlands Guidehnes) will be followed to mimmize impacts No contaminated groundwater impacts have been identified at the srte Air Quality Descnbe potential impacts to air quality resulting from this project. Distinguish between impacts from mobile sources (VMT/trips) and stationary sources (APEN, HAPS). - No IMrnC'rs The project will not cause air quality impacts, but m fact should unprove air qualrty by encouraging alternahve transportahon in the form of bicychng on the trail network. G. Resource Conservation 1. Descnbe potential changes in water use which may result from the project - No '~ IMPACTS ~ Est~mate the mdoor, outdoor (irngation) and total dazly water use for the facihty. Descnbe plans for minimizing water use on the srte. 2. Describe potential mcreases m energy use wkuch may result from the project. - NO IMPACTS a. Descnbe plans for mmimizing energy use on the pro~ect or how energy conservation measures will be incorporated mto the bu~ldmg design Descnbe the potential for excess waste generation resulting from the pro~ect Descnbe plans for recycling and waste mimmization (deconstrucrion, reuse, recycling, green points) - No IMPnCTs The project will not use water or energy, or generate waste. Inihally, planhngs will need to be watered to ensure establishment and survival Planrings will be selected and located along the slope of the channel banks based on the water requirements of the plant and the water table associated with the stream. ~ ,~,,,, 13 H. Cultural/Historic Resources Describe any impacts to: a. a prehistoric or historic azchaeolog~cal site b. a bmldmg or structure over fifty yeazs of age. c a tustoric feature of the site such as an irrigahon ditch d sigmficant agricultural lands. which may result from the pro~ect - No IMPncTs The pro~ect will not impact any cultural or historic resources There aze no identified histonc features in the pro~ect area. I. Visual Quality Describe any effects on: ~ a Scemc vistas or views open to the pubhc b. The aesthehcs of a site open to public view. c. View comdors from the site to unique geologic or physical features ~ which may result from the pro~ect - No IMPnCTs The pro~ect wil] not mcrease the heights of the roadway surface, therefore there will be no effects on scemc v~ews, or view comdors. The aesthehcs of the srte will be improved by removmg the trash and debns, and the possible under-groundmg of overhead utilrty lmes behmd Basemaz J. Safety Descnbe any additional health hazazds, odors, or exposure of people to radon that may result from the pro~ect - No IrvirncTs 2 Descnbe any addrtional site hazards that may result from the pro~ect (Includmg risk of explosion or the release of hazardous substances such as oil, pesticides, chemicals or radiation) - NO IMrnC'r5 The proposed pro~ect will improve safety by prov~dmg a grade-sepazated crossmg of 27`~ Way and possibly at Moorhead Avenue, improving the at-grade pedestnan crossing facilrties at these locarions, and mcreasing the flood capacity of the stream channel and box culverts. Potential site hazards include colhsions among users, nsk to users dunng condrtions of Yugh water, and other path-related concems These hazazds will be mmim~zed by posting speed limit signs to reduce ,.",, 14 ,~., t..,. the speed of trail users, and by providing adequate sight d~stances for accommodahng multiple users K. Physiological Well-being Describe the potenhal for exposure of people to excessrve noise caused by any phase of the pro~ect. - SEE BELOw Descnbe any excessive light or glaze that may result from the project. - No IMPACTS Descnbe any increase m vibrations that may result from the project. - No IMPACTS If potential impacts have been identified, please provide the following A descnption of how the proposed pro~ect would avoid, mmimize, or mitigate identified impacts - SEE BELOw During construchon, noise related to heavy equipment operat~on will be generated dunng the ~ daytime hours. No other phase of the pro~ect will have a negahve impact on phys~ologic well ~, bemg The pro~ect itself will enhance phys~ological well bemg by providing an outdoor recreat~onal opportumty, relievmg traffic congeshon by providing alternatrve transportahon opt~ons, and enhancmg the environment in the pro~ect azea. Lighhng m the underpasses will be designed for safety purposes, and will not cause excess~ve glaze L. Services Descnbe any additional need for the followmg services as a result of the pro~ect - NO IMPACTS a health caze/social services b water or sanitary sewer services c police serv~ces d fire protection e recreation or pazks facilities f hbranes g. transportation improvements/traffic mrtigahon h pazkmg i. affordable housing ~. open space/urban open land ~ ,,,,,,,,, 15 k power or energy use 1. telecommumcahons The proposed project will not increase the need for any of the above services or facilrties. The project should reduce the need for several services, mcluding police by eliminating existing ludmg places and campmg sites, and ttansportahon and pazkmg by providmg altemative transportation in the form of bicycle commuting Proper lighting and landscapmg will be used to discourage cnmes The project will also contribute to urban open land by preserving and enhancmg the Skunk Creek comdor. Describe any impacts to any of the above existmg or planned crty serv~ces or department master plans as a result of this pro~ect. (e.g budget, available parkmg, planned use of the site, public access, automobile/pedestnan conflicts, views) - NO IMPACTS There will be no impacts to any of the above exishng or planned city services or department master plans as a result of this project. M. Special Populations -^-. 1. Descnbe any effects the pro~ect may have on the followmg special populations. - SEE BELOW ~ a persons with disabilrties b. semor populahon c. ch~ldren d restncted mcome persons Due to significant development in the pro~ect azea and other site constraints there may not be adequate space available to meet ADA slope requirements for the underpass access ramps in all locations. The pro~ect will be designed to achieve the lowest feasible slope and to meet ADA reqwrements as much as possible to ensure adequate use and participahon m the trail system by persons wrth disabilihes, seniors, and children. ,..., 16 Skunk Creek Project _ ~ ~ ~ ~ ~ Vicini .. 1 0 7 2 Miles Main Roads ~ , ,V ~ Arterial N ~ Highway ~ , ,% Street Centerlines Survey Polygons E Lakes ~ City Limits S Skunk Creek Project Flood Zones ~ ~ [~ High haz shp ; ^~/ Creek_ditch shp 0 Corney shp ~ 100year.shp Text Street Names Building Footprints Building Mise Tank Main Roads ~ Arterial ~ Highway = Street Centerlines ` Survey Polygons Lakes 0 Ownership Parcels o ~~ ~m~u N E w, S 0.1 0 0.1 0.2 Miles ~. ~ .. ,~«+ v.. ~ Skunk Creek Project Wetiand Areas ,~ ~ fl~d ~o ~ , a ~ ~ ~ ~ Wetlands.shp Text Street Names Building Footprints 0 Building ~ Misc ~ Tank Main Roads ~/ Arterial N Highway / Street Centerlines Survey Polygons - Lakes 0 Ownership Parcels 0 City Limits ~rn~,~ ~~~ N S F' Y E ~ ~ ~ 0.1 0 0.1 0.2 Miles CK'S ?ZA 51 27Tr+ :YA ~ ) OATS LNE55 1TER i I , ~ i i ~ ,~ ~ I~ ~ ~~ ; ~\ ~ i i~ C < ~WV1 WF-W < W U m U < ~J ~ I ~~ \ \ ~ \ `~ ~~ ~'~-- G-Q . \ ~~----~ ~~ \ ~ i I o \ n ~ < N ~ - _ + y _I _ ~ h I - -r- y d~_ \~-~~ O a '' ' q ~ a -'n ---- ~-. + d d o MOORHEAD AVE. ° ~ ~`L---- _ _ _ _ " ' _ " ~ u+o ww iED ~ / ~ 4~~ // /O ~ ~~~~ // / e _ ~~ ~- ' ~ ° ~ ~ ,~ ~ ~ ~ ~'~ !~ ~I i " , CREATION DATE 8/31/Ot INITIALS SJ8 (~ U5T 4~~IFIGTION DATE INRIALS ~ 't 1 FULL PATH ~ DRAN7NG FILE NNAE ~ 'I ACFD VER ROI $CALE A$ $HOWN UNITS ENCUSH ~ COMCNE7E CONCRETE 9REWAY ROODwALI ~ ~ - ~ BAOOKS~DE APPARTMENTS ERP OPERATING LIMITED PARTNERSHIP PROPERTY ~ ao* z uoscNern sueoi~voH c P-28 v-i ~)1 N PLAN 5a 25~ ORICINiL SCPLE I' = SO REMQvE Ek15TINC AOD NEW 10P SL1B TOP $~pg - 10 -0' 7YP ' ° b ~ EXISTING SiRUCTURE ~ r ~ ~ SECTION iHRU STRUCTURES ~,OOKING UP STR A~ Loris and Assceiates, Inc. 5775 Fletlmn PkwY Sutte 207 BouWer. Colorad° ~Ol 303 aa4 2073 ``y pF BOU~~i^ p ~ ~,~~ ~ NO RE4ISIONS ~ = REVISEO ~ voiu ~~~ REUUYtEO d d - - - - - FALB . 1 P~Z2ERIA 0 S n ~ n ~ ~i00MY Ex5~7M: ~ _ _~~~ _ .~ , ~ ~~~ _ _ ~~ _ \ _~~ . ~_ ~ ~~ o° n \P -~ ~ ~ + -.._ P ~ -'~~ ~~ BR00 OE ~ I~~ ~ APAR NT ~- ACCESS rj BROOKSiDE , APARTMENTS ~ 5 ~-- ~ f i \ ~ ~--L~ -J _ ~ ~ 2780 27H9 2780 ~798 ~ -- - - - ra~~RH~ar, av.- R°r~i~ ~'o~ e~i LX~St~~ LoX~S 1 STRUCTURE LAYOUT ALTERNATE 1 ISSUED B'I LORIS AND ASSOCNTES, INC REVISED SHEET SUBSET SUBSET SHEETS PROJECT NO/CODE SKUNK CREEK 00322 SHEET NUNBER i CK'S ?ZA ~~ , ~ \l ~\ 51 ?7Th WA~ ) OATS LNESS 1TER ~C/ ~ < ~~~ I y~N y Z U E%ISfPlL m U < ~ (~N '~ _ ~ `-NEW 8'd ' C . ~ }- i ~ Q ~ ~ -~ ,e•ao• ww- _ w~t~x cx~NC ~ ~ /\ I~ ~ i ~'_"'_'_'Q_-o.'_"__'~_'__'_'__10'-0'_'_' ' " ~ ~ q ~ f~--- --- --------------------- ~-- ~X6TWC $iRUCNRE )RHEAD AVE ° ----- ~ \ ~ ----- - - / uNa1DW~Y CON51NlICiN1N REYOVE E%ISfWG - MWCYULI i - CONCREIE ~ ROOOwuL ___ . i ` r ~ ~ ~^~ r~ ! ~ I v r ~~ f ~ T ' _ _ ' ~ ~ B p + flQ1DM~Y COk ~ ~rs NEW 76'xZ0' LOW- WAI[N CRUSyNC N'E71~41D5 IIDILTS d d ~~~~~ \ i'/--7~~~~~ v l.;! 'Tv.'~.a.i • 4¢~ £ il ~ `~~ fr~CR~[ ` o ~ ~ ~ \r rt -fl~OwK~ ` __ ~ n „ .. ,;,~ na~r ,wo ww . ~ - p ~ `^~._ ~ _ ~ vm ~ ~_ ` _ / _ " _ _ ' _ _ / / ~~~ ~ _ 'Rr _ ___ ~ _ ~ ~ _~ - _' _ _ _' ' WIEi N!D 5 P 1 r~ar~o ~ BROOKSIOE APPARTMENTS N ERP OPERATING UMITED PARTNERSHIP PROPERTY (LOi Z NOSCHE~TI Su80~`~SICrv ° P-28 G-I nl PLAN 50 25 0 50 ~ ORIGINAI SCPLE i' = 50 ~ \ utw rnuroc*r _ SECTION THRU 27th W~ LOOKING UP STREAM COMPUTER FILE INFORMATION CREATI~N pATE BJ31/O7 IN1iL1L5 SJB ~ UST MODIFIGiION DATE INITIALS O FULL PATH 0 otrnwiNG vilE wwE ~ ACAp VER RO1 $CALE AS SHOWN UNR$ ENCLISH ~ \~~ I \ ` , ~ . ~ ~ ~~ ~ . ~ . \ \ ` ~ ~I 1 \ ' ~L ~- ~~ `\ - O BO% LULVERT _ Lons and Associates~ I~C, ``tiy ~F Bp~~dfp 5775Fla1uonP~~ ~ ~r~,~' . ~ NO REVISIONS Surte 207 ~ BO11~~C0~0~~ Z REVISEO i 9IX1 Md 2079 V01~ ACCE55 . I ~ ~i 1 I ' SfR11C7UHE IN-PIACE) ~ I I-l BRO~KSIDE ' ~--J L-.-~ APARTMENTS I- r--- ~ _, i_--~ ~ - ~ ' ^~ 2:80 2798 2~b0 27a"8 --- - - - M~7nRHFAO AVF '_'_"'__"_'_"'_'"___"_"_"_""'_"___' _ '_ __'__' _ __'__'__' ' '_' '_'_ " '._ 10'-0' 70 -0' o T ~ "_ '_'_"_"""'__ "_'_"__'_"'___" '__ " ' _' _" " _ "__ "'__ __' ExIAING $TRUCTURE eoz cuiv¢m` SECTION THRU MOORHEAD LOOKING UP STREA~f 'A~'R' ~~w KI~ ~Or eM1/-I~'1 ~N.LG ~at1,~ STRUCTURE LAYOUT ALTERNATE 2 ~SSUEO BY LORIS nN0 aS50CWiE5. ~NC REVISED SHEET SUBSET SUBSET SHEETS PROJECT NO/CODE SKUNK CREEK 00322 SHEET NUAIB£R 1 ~' ~ ~ ~Z s \, ., ~~ ~ ~ ~~ ~ - ~ ~ ~ ' ; ~ ~ ` '~ i ' ~ ~, ~ ~ ; ~ ~ ~ ~` ~~ ~ ~ ~ \~ !~ ' . ~ ~~-~ ~~ ~ti'^ " 1 ~ ~ \ ` V_-----1 ~ I I f ' \ ` ~~ ~ ~ ' ~ (~~_ ~ d d ~ i ~ _ 1_ I ~ ~\ ~ Q ~ I ~ ` ~. ~J ~ n ~ ,~; I FAlB ~ 5~ 27rH Nai ` + . - ' '± - - - ~ 1 ~~• _ _ - - - - - PIZ2ERIA O O ~ Fl ~ 4 - J OAT$ ~ ' ~~ ~ '" ~---- ~ ~ ~ ~ _ ~n _ _ _ _ ~ ~a e ~v~'~ ~~ _ ~ z 4 LNE55 i ~ i] + d d o AOWwAr r - ~ ~••'~' ~. ~ ~ - _ ITER - l ~ w . / m MOORHEAD AVE. ° ~ ~~~,~°NS'~.° R'`` ~' ~ ~ i~ ~ _' _" _' _ \ ' _ ' ' n ~~ ;l'`,,• ~ i aoww~rc '~\~----------- ~ \ ryy . ` ~~v~ uuns ___--- ------- f,x,~i,~ - - - i ,~ ~ „ ~ J ~. aaow~r AcmNSrmunoN 4 W U C~~CRCTE BtlcETUY 4 GK ~r UYtS mU< ~ ~/ ~~ - - ~ r ^'1 „O ~ ' / "~'~~ _ _- _ _ __ _ _ _ - _ _ _ ~ .f~~ Q _ ~ ~ ~-„ '_ .,: n ~ a ~ a ~ _ _ _ __ - " ~~Y 1EW 95'.20 CONCRETE u I - -- Box cul.vEm a l / _ _ _ __ - _ - _ __ '' ~ _'"`- RELOVF EXKTINC i ~ O\ - - SIMICIURE ~ : , REWYE STRIICIU ->--..- _'_"_ XEPLICE r 9 'i20'a90 / .. - _ ' _ ' _ ' _ ' _ _ (~ i ~ ~ C~CHETE ~ vERTi - - - BRO~ I~E i I ~ ~ i - APAR NT I~ ' ACCESS ~ BROOKSIOE i ,~ ;~ ^ ,~ BROOKSIOE ~ Q , e ~~ ~~ ~ ~ APARTMENTS ~ y APPARTMENT5 ~pw_~pw ~ ~• <J ~u~ts N aura+~~ !- ~--, ~--, ~J ~ ' Z ,I EFP OPERATiNG LiMiTED `'--- ' / ~ ~ PARTNERSNIP PROPERTY ~ ~ y_/C~ ~ i I o (~A~ 1 ~.oSaEtn sueoimsi~N 2780 2788 ' a-ZB c-i nl I 2780 Z'&8 ~IIMRH~Al7 AbF PIAN 50 25 0 50 ~ QRIGINAL $CME I' = 50 70' -0' ~ ~ 0 m ~ ExISTING 5tRUC111ftE ~ ~ i0 BE REMOVED , 1~ -0' M, a -- ------------ - ---- - -- zx ~ 7'r- REWCiION IN STREAU BED EL REOUIRED COMPUTER FILE INfORMATION CREATION DATE 8/31/Ol INITIAIS SIB ~ lAST YOOIFILATION DATE INRIALS ~ FUU PATH 0 ortnvnNC ~~t wwe ~ ACAD VER R01 SCALE AS SHOWN UNRS ENCLISH ~ 4FCTION THRU STRUCTURE LOOKING UP STREAM Lofls 2~Id {1SSO~~at~,S, Inc. ~t+ ~F Bo~~o~,p 5775 Flebron PkMq ~ ~ NO REVISION$ SWe207 ~~ ~- B01~B~• C0~~0 ~~ = REVISED . 303.<d4 2079 V010 ~ rG,q-c r ra.Q ft ~'rcrK.~~~ ~ c I R~PI..« ow~ e~ I.o~-r.. ~DO% LwlVtr}S v~~i'~ Niv~ UMZ~r~fSiGi STRUCTURE LAYOUT PROJECT NO/CODE ALTERNATE 3 SKUNK CREEK issueo ev ~aais uao usocutts, ir+c 00322 REV~SED SHEET SU85ET SUBSET SHEETS $HEET NUHBER ~ 0 ~ m~ ~ a uf E< Ri n~ g$R a i0 ~'~J < wV~ ~- ~ o°E ~u~a ,i~> 1 1r . to M1 i j ~ ' l ~ 'I 11 ~~ Y //' „ _-, , i ~ ~~ / / ~1 ------ - ----'" ' I , : --- ._-- ~ ,- - ' r¢sra ca vrtoaR oastwc . ~ ~ ~ ~ ~ ~ ~ ~ ~ ~l i ~ _Y~MIQE ~1~T4 a / / , y" ~ ~__ ____ ________________ _ \ ~ ' ` ~D / _ _-_ ~ ~ ~ _ i ~ ~~A / - - ~ 00 NOT d51111~ / ~ OF 'iNl Y ~ - - _ -~ - _ ' ~• VNaONC LAT i Y~i./ ~~ l 1 / ~ ~~~ ~ / ~~~~ 1 _:16~ " ' ' r~ G / 1 1 ~1 I I ~ _ 1 / ~ ` // O T BOULEIt IENMACEO / ' ~ ~ ' r~LL $11~ f4 ' _ I . ~~ ~xci ~ F I ! / ' `~ 1 ~ ~ / / ,r" ~, • I /, / 1 / ~1' ~, ~, i il ~ 1 1 . _// , .~~ , // - '~ , .~ ~ ;d~ .r'~ _ ! _ , ~!~ / / ^`` ~~. ~ ~ ~ ~ ~ i~ l~ISiHG~~1RIil 1RN140101R ~ i / ~ ~w - _ _ ~ ~ ~ ~ . . Y ~' SIRUC~~ ~~ ~~ iS' 1Eli0RNfY % i lOl ~ l0'1Y ~ ' )6S 1 ~ ' , ~ u~q' / ~p0 ~ '~ _ i •~ ~ Pos!'e]ul~T orow~cE ~ ~~ - - ~ / ~, i ' - ~ - ' t -' ' , /.' - . .' ,~ ° Rd~ it~cnr - - - °"° ' ' ~ aao ~ ~ - - ---~= - ~ - ' s~'y' _ - " ~ ~, _ - , ~ 'i , s = " o~ , , , `~ y'm ~cs , '--- S~Y~llil i~b~~- 2a00 _ ~ : ~~ ~. ~ ~ A¢RB0FlDS~~ ~ ~ , ~ • ~ \ ~ -' ;I ~ "" -_-- - _-/ "' ` _ /T _ __ ' _ ~ ~,i ~ ~ ~~''~i/// " /.~/~ ` ~ ~ ~ ~. ~ \ •~ • ----- ------___- n y~~E--- --- - -'~-' ~ y' ,: ~ i~ , . _'`' - _ _ =_yc1AWl~' _ _ _ =~1B~T_ = _ - _' _' _ ~ ~ ` ~ _ i' i ('~~__"~01C_ '____'~~ -~-~~"____ ~~ ~ ~ i L ' i . `\ ~J ~____ __ i~__' wroi[croc ' _ _ :' , v ; ~ , °~i~_ ~ ~`~ ~~ ~ _-_____" ~MtlttPOl~rx ' ~ _ r i' ~~~ '~~_t=' r_~~~___ ~-_='-_._~' ~__'._-- / ~ ~~~ I I ,\ ` _-~~~'~~_`~~..~_-_ ~._ -~~~ ~ ~__~~ _ _ ~ ~ ~i / ~ `~ ~ `~ ~ ~ i i/ ~ ~ i .\ ~ \ _ .C\ l i q~ / ~ ~ ~ / \ i i / I `__`~ ~ \ \ \\``~~ `\~~~ ` ~~ ____/_ ~______~ __i ~/- / _ ` I /i y~ ( ~ i' ~ ~ ~ .~ ~ % ~I ~ ~ ~/~ ^ i ~ ~ ! ~~ ~ i / ` ~- `~'---`--'--^--"- ___ `~ 1 ~ -~)~ I ~ i i, ~ . ~ ~~ _~ 1 , ~ 1 I ` ~'_________' ~ . ` ~ ~/ I ~ i 1 `` __-____~___~~` ~ ~-~ / ~ i ~' ~ - - - ~ `" ~ , %" ~ -- , _ ~~~ ~, ~~ ~ ; ~ , ' r. NN Yt(1rP) Fll1ER f~BNIC ~~ (YqM 1MN5 pt EWK) z (iw~ -• -' t uua % ,•' '• ~urasnhmm rumc _ sas aa coua~crzn .. ~ BiW61LL lERRACED BOULDER ~~ WALLS MR TYP~ A TRAI A CROSS SECT70N SCI~IE.~~~S __ --' ~4~~`f ~~ ~ SIwvE ~ I ~ i / I ' _~ ~T fRADE -~-~' r ~ ~ I ~ -- - _. i /i~ ~ ~ ~ __~~^!~ ~ ! ~ ~ 10' CaXOIEIE I 1 • ~ '' mw as ~r ~ ~' <TV°> I i _ - ' ' - ~~- ~ if.µi ~~io r~s'~~ i ~_ 1~: 1~~ ~~ % ~ i~ i i~ i ~ ~' ~ ,i ~ ~.'__~ ~I ~ ~ ~~ 7 i , i ~ _ ~ i i n ' i ~i .;,1 ~~ ~C i 'i , a i .i i . ~ / ' ~~:?` ~ _ .~ ' i~ / ' -~~. . i~ ' ~ ' i <~ ~ ~~ ~ ~ i~ ~ _ / i , i ~ ( / ~ I i ~ i~ 1 ~ i~~' i / ~ i / / _ 1 ii; i ' i ` i ii; ~ ~ ~ r,: ~ i i i \i i i ~;;~ '' '~_ /~~ / ii' ~'~~ i ii ~~/ , / i i i~ ~ i i ` I ,~ , -~ , ,.- , ' ~ , j' , , ~L~'w.i~5 v~l, rrc~rrcoQ "~ ~ A ~ i-G r,n.~.~l-~ ~ c. ~ Zvt}G f ~.N ) °° :o~ ~°" c""Z., ~°' ~~s ~~~ " " SKUNK CREEK GREENWAY IMPROVEMENTS `"•~~ CITY OF BOULDER, COLORADOI ~- a ~~ x!___- BROADWAY TO 28TH STREET ~._~~FE 9~a~ ___ 1`::,' PHASE 1 TRAIL IMPROVEMENTS ~ ofsiac OIAHNEI PoPIiM SpL ~ APPROYED EWi1l COP~CIED 91&JtAOE ~ ~> 1 1~ - 10 M1 I ~ I I' i i -___'_ , ____'_________ ____________• \~~% , 't = i~ i~ / ~ ' i ~'~' ~ ~ 1 / , , , ' , ~ , 1 . ~ / ~ ~ ~ 1 , ~ ~ , , 1,/ -= . -- ~,~' , , , , , 1 / ~~ ~ / I ~ ~ \ ~ ~~ I /~\ ~•~ r' /'' 1RIJ~~ ~ _, ~ / , ~ ~ . `~' ' yi . ~6y ' N ~ / ' J' r ' ~ i ,` ~ ~ `~o / -- _ _ ' ' / i f iy / ~ ' ; ~ ~~ ~~~ ~ ,- ~,?~~~j-~"~ ~ -- ~ i-~. - _ -f /i ~ f ~ ' ~ ~ ~ //~ ~,~, "~._'_'" ~ •~ i ,j ~/ ,~ ~,~,L____' - _ _ . , ' ~ ~~~~ ~~ _ ' ~ ~ ' ' ~// ~ J~' ~~ /i ~ - - SMNHIq~ '___ ~ • ' ]S ~- - ~~ / ~~ , -- i~ ~ i ~~ i ~ U~~ ~ ~ , n ; io ~r w~u. ;" ~ ~~ ` ~ ; ~ ~ 1 / ~ I' i I CONC BOX CUIYEpT `iac swew ~ / iaew.uw ~ ~$ _ , / ~\ ~ {~ ~ ~ ~~~ ^~ ~ i i i i , ' ~-' ~ ~ ~~~ , , ~ ~ ~ ~~~ ' `~DROR(lRUC1U~ H V \~ ~ ('~G 0.E. h ~ t0 ~ ~ ~~ ~(1~~!'SI CLL~4R~ CR~OES/% , I i \ slE \ _ i ii~ , j / . 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I ~ '~_ ' ~\ ~ `\ -' ~ / i % ~' ~ ~ ' ' ~. 1 \ OR9( mE ~ / I ~ ~' (N~1. / ~, - i i i~ / 'i i ~ ~-- ~ i .~ ~ ' i ~ ii%• i~ . , ( ' ~ i~~ i ~ i ii, i ~ ~ ~ i ~~ i~ i i i<< ~ i i , ~ i ~ i ~ ii;~ ~ ~~ ~' .i /~' ~ ~ ~I ~ ~ ~ _ ~ ~~~ / ii~ ~~~ ~ . . ~ i ii ~~ i/ ~ ~i i ~ / t ~~~ ~~/// 1 ~~, / 1 ~/ ~ t , // i= ;~ ; _ ~ ~"' Y ~ . `~\~ ,` \ ~~ ~~ ` ~ ~ ~ _ ~ \ \ `` ~ ~~ ~ _ H Q ~ 17Y d2QIN0 4«US) _'____" r~J _ {___ ____B~os'__- . . . . . ~ < w a ~o~ ~~ a ~ „ ~~ z;a :- ~•i ~ 'R' 3a° _„ ~ _ :'~ "~ 6 ~~ _.u„ .~oE E fr:z°£ i u's' i ~NE]I~iOR~ L B BOlf~YFRT 91 ~LTAIIS I~ ~fG.~rrcR ~ ss xus) A( f't r v~ ~. ~ s. s(os~ 'f'~ ~rC sXosj CF 1J1~1.1> PROPOSED 27TH WAY ~~ BOX CULVERT scuc. r_s. ~~ 5ot ~ 4~, ~ ~ CITY OF BOULDER, COLORADO ~- o~ ~ x~"' ~"` ~ 9/Oi ~~~~~~ _ K CRtEK GREENWAY IMPROVEMENTS '~°~~ ( BROADWAY TO 28TH STREET ~i~ _i~E PHASE 2 TRAIL IMPROVEMENTS t~ G~m~on Oais Cmnnl Dale S~P 11 2pp1 - 2 16pm BY Ixe Nom~ G \~-Pmkcl~\990b\0.9\LA-S~~nY-PNAQ7 O.p ~ umcnmmt~ Vnl (G ~e-Vrowc4\990b\a~a\u-Sx~nx-PneSEi e.el . \ / ~ O O ~ ~ ~ Q r ~ D O ~ ~ ~ ~ ~ _ D m C~ ~ ~ ~ D ~m r ~Z ~ N ~ ~D ,Z~j = -< O ~ ~ ~T7 r~*i m O z --i < ~ ~ z ~ _, ,, ~ j m ~ ~ ~ \ ~'~~~ MA _ ,~`:,. i I v v~ . \`~ ~ ~ . ~~ ~ .i ~ ` , •~ 1~', ~`` ` \~~.. ~ ~ ~ " ~ ~ ~~ ~ ~ \~ ' ~ ~ ~ ~y.• ~~ \``\\\`\\\\` f \\~` \\`~ I ` ~~~~ ~'°-* ' ~• 7 ~ ~~ ~~~~ 4w~ ~ 9 ~ ~ ~ ~ ` ~ ` '3 i ~ '~ . ~ ~ ~~; ~ ~ \ ~ . ~ ~. , i ~ \~~.~¢g i ~r°~ ,~' ~ ~, ~, ~~ :, __ ~~ ~F ~ ', _ _-~ J W/ \,--~\I ~F~,%i~~ ~c~~~~~ s~a~ ~ N ~ 4 u d r '} P ~ ~ ~ ~ n ~ V ~ ( ~ ± / ~' -~ , ~ ~ ~ v~ ~~f ~i i ~i y~ ~ ~ i ~ /,;~~~~~ ~ : I ~ ~ l~~~/ I / ;~1. ~; ~ ' 'I , , ,, i ~~~.~/ ~ ~ ~ , ~ '~~ ~ ~ . ,~ ~~ ~~~.•~ G, , ^ ~ ~,~~~ ~ .~, .L , , ~ ~' ~,,, , ~ ' ~ e ~ ~ ; 4 ;+;~ i„' ~; / ~ ' ~' i „ , 1„ • _'~ ~ ~/ ae~ 11~ ~ ~ \ , ~~~ /,/ ,' ~ `. ~ vP ^'r~A ~ ~ii~ ~ ~~~ 1~ i i ~ ' ii i~ ,, ~/ , ~. i ~.a`9$] ~*' ~ ~~r i i v /l6 ~ ~ /% , ,~-r ~ , , ,. ~ ,~ ; , ~ ` • gY~ / ~~ i ~ / ~ ' ~ i ~ ; ~?/ ~,~'~LDn~ //,d% ii /0 i < ~ / ~ j/ '/ ~/. ` ~$,~ i vN i / ~•T ~ / ~ ' ~ ~ . i /p ~//// • ~I / I % .r i/ ~~ iui /ii ~l i~ ~ , i ~ i ~/ ~ YO~ ~~N I ~t i ~~ ~ / , ~ i ~~ r~ ~~ / i ~i S~i~~ ~ ib ~ ~ ~ ~; ~ ~i i /~ , , y , ~ , , /iu i t~~ i~ ~ yr ~j/-'~ i ~~' iui ~ ~~ n ~ /; //iii~~ ,p I /~ ~'~ r ,/ / . /i~iii~~i~ y ~ ~ / ~ ~C~.~' /, . 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Y No r-\...~ , , ~ 'o , ' '". ~ , - i / ~~ ~. , ~, i % ~ ~-~ 'l / ATTACHMENT B ,~^+ ~ Track #34 DRC Meetmg• 9/6/01 CITY OF BOULDER DEVELOPMENT REVIEW RESU~TS AND COMMENTS ATE OF COMMENTS: Se tember 6, 2001 CASE MANAGER: Don Durso PROJECT NAME: Skunk Creek Trail and Environmental Improvements LOCATION: Skunk Creek between Broadway and US36 COORDINATES: S1W4l5 REQUEST TYPE AND NUMBER: CEAP2001-1 APPLICANT: City of Boulder Greenways DESCRIPTION: Trail and flood improvements to connect the existing trails between the Skunk Creek Broadway underpass, and the US36 entrance ramp underpass. REVIEW FINDINGS AND COMMENTS ~'' ~~ Access/Circulation 1 Impacts to parking lots along the rear of the Base Mar shopping center wdl reqwre a minor modification to the existing PUD approvals for that site Parking spaces and dnve isles wdl be reviewed as part of these revisions 2 Connections to both sides of 27th Way is encouraged to provide good connectivity to serve pedestnans and bicycles accessing the path from the RTD park-n-ride located at the 27th and Broadway intersection Steve Durian, Transportation Engineer, 441-1880 Flood Control Good overall ~ob on addressing the CEAP issues The pro~ect wili be of great benefit Comments as follows Under number 2 Background, purpose and need for the pro~ect - flood contro~ Should also point out that the conveyance capaciry wtll be increased along the drainageway between Broadway and 27th Way to eliminate flood plain areas to the extent practical Also, the pro~ect should present revised floodplain mapping based on the proposed improvements Bob Harberg, Public WorkslUtil~ties Pro~ect Management, 441-3226 Land Uses A number of parcels abutting the location of the trail are sub~ect to previous discretionary approvals Any changes to these site plans which affect parking wdl reqwre at least a minor modification to the site plans A minor modification is a staff admmistrative review which takes approximately two weeks to complete Changes to the approvals are not permitted to reduce open space below today's open space required by current city Land Use Code ~»"° ~~ The following developments are sub~ect to a discretionary review BASEMAR SHOPPING CENTER-The last amendment done (Taco Beii minor modification) showed a parking requirement of 460 spaces with 466 provided (this includes the future retail space approved but not yet built) Removai of more than 6 spaces will have an impact on future square footage that can be added to the site BROOKSIDE APARTMENTS- This development is reqwred to have 200 parking spaces It appears that 202 are provided It appears that the development provides 98,000 square feet of open space where 80,000 square feet is reqwred if it is proposed to reduce the numbers below the required amounts, follow-up discussions with city staff is recommended Other properties surrounding the proposed area (such as Creek Side Apartments and the liquor store) also have simdar requvements based upon by-right uses and development, such as parking, openspace, and minimum lot areas Specific proposals to reduce these requirements should be pursued through follow-up discussions with staff Miscella~eous CEAP alternative analysis may not be adequate for Wetlands ordinance alternative analys~s, and a wetiands permit will be necessary for this pro~ect (which is acknowledged in the CEAP ) ~ There are statements in the CEAP to the effect that some stream segments, mature trees, native vegetation will be avoided during construction Public Works has learned from experience on Silver Lake Pipeline, and Coid Springs segment of Lakewood pipeline - how difficult this can be with contractors Public Works has successfully utilized techniques in the contracts and on the ground - such as clearly markmg trees, vegetation to be protected - plastic fenang marking areas as off-I~mits, and, possibly most important, fines against the contractor for violating the vegetation ~ to be protected Sue Ellen Harrison, City Attorney's Office, 4413020 Neighborhood Comments The following comments were received from the public We strongly support the proposed Skunk Creek Trail We bicycle this route at least a couple of times a week The crossing of 27th Way south of Basemar Center is particularly hazardous Moorhead Ave is much less of a problem Completion of a continuous path from west of Broadway to east of 28th St / US 36 will be an important addition to the Boulder tratl system Tom Van Zandt and Natalie Hedberg 2255 Bluebell Ave Boulder Open Space Review cnteria are met No other comments Don D'Amico, Open Space Pohce Creating pedestnan paths, bike paths and tunnels creates areas for crimes to be committed Proper lighting and landscaping should be considered when developing the pro~ect Possible mstallation of a solar 911 phone should be considered Larry Wieda, Police Dept f"'*, Site Design r Recommend that path be 10' minimum in all locations including immediately west of 27th W ay '~a.. Recommend shifting low water crossing (immediately west of 27th Way) to the east of where currently designed, so that the skew as designed could be mmimized This would allow the low water crossing to be lower, and a shorter cast-in-place structure that can fit the existmg site with little impact to existing vegetation Recommend looking at the possible installation of a low-water crossing on the downstream side of 27th Way to provide a connection from the street sidewalk to the south to the mainl~ne path Recommend considenng the undergrounding of the existing overhead utilities along the backside of the Basemar site in con~unction with pro~ect If not possible at this time, consider installing the conduits necessary to eliminate future impacts to the newly constructed path in the event of future undergrounding Recommend steepenmg the approach to the proposed underpass downstream of Moorhead in order to tie into the parking lot grade qwcker, and better faalitate connections Alex May, Public Works/Transportation, 441-3266 Recommend providing a pedestnan connection from the sidewalk along the east side of 27`" way, into the bike path ~ust after it passes under 27`h Way Wetlands Physical constraints to prov~ding more habitat enhancement on the north side of the creek behind Basemar Shopping Center are noted However, please explore alternative alignments of the trail in this section through a minor modification of the PUD to provide any additional space for nparian enhancement ~ Bev Johnson,303-441-3272 y`"' III. INFORMATIONAL COMMENTS Fiood Control The applicant is required to obtain a Floodpiain Development Permit (High Nazard and Conveyance Zones) pnor to start of any construction activities Bruce Johnson, 303-441-3206 Wetlands The app~icant is reqwred to obtain a Wetland Permit prior to the start of any construction activities Contact Alan Taylor, 303-441-4232