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i I REDMOND WATERSHED MASTER PLAN NAKANO · DENNIS LANDSCAPE ARCHITECTS ---PAGE BREAK--- . ) , l ; . I I ---PAGE BREAK--- r I REDMOND WATERSHED MASTER PLAN NAKANO · DENNIS LANDSCAPE ARCHITECTS ---PAGE BREAK--- ---PAGE BREAK--- MAYOR: CITY COUNCIL Sharon Dorning, Pres. 1994 Jbn Robinson, Vice-Pres. 1994 Richard Cole CITY OF REDMOND OFFICIALS Rosemarie Ives. Mark Denton Richard Grubb * Warren Appleton, Pres. 1993 (*Terms expired 12/1993) Nancy McCormick Greg Misener * Howard Harrison, Vice-Pres. 1993 WATERSHED PRESERVE MASTER PLAN PARTICIPANTS PARK BOARD: Sterling Leibenguth, Chair Gordon Bluechel, Vice-Chair STEERING COMMITTEE: Gordon BluecheL Chair Park Board Member Jbn Palmer, Vice Chair Trails Committee Member Terri Hartley Local Citizen Glenn Kost Chief of Capital Improvements & Planning for King County Parks Linda Bruns Alanna Nelson Kristin Olpinski Sue Chenault Trails Committee Member Karen Cook-Anderson Trails Committee Member Judy Willman KC Executive Horse Council PARKS & RECREATION DEPARTMENT STAFF: John Couch, Director ✓CONSULTANTS: Landscape Architects: Nakano • Dennis 300 East Pike Seattle, Washington 98122 Surveyors: Barrett Consulting Group 720 South 333rd Street, Suite 200 Federal Way, Washington 98003 Geotechnical Engineers: GeoEngineers 8410 154thAvenueNE Redmond, Washington 98052 REDMOND WATERSHED MASTER PLAN Roy Lehner, Project Manager Architects: Ivary & Associates 5651 University Way NE Seattle, Washington 98105 Civil Engineers: SvR Design Company 911 Western Avenue, Suite 302 Seattle, Washington 98104 Interpretive Designer: Linda Feltner P.O. Box 4251 Seattle, Washington 98104 Thomas Paine James Tyler Howard Harrison City Councilmember Deloa Parrish Backcountry Bicycle Trails Club Roy Lehner Redmond Park Planner Linda Gorremans, Assistant to Project Manager UVWetland & Wildlife Biologists: The Watershed Company 10827 NE 68th Street, Suite B Kirkland, Washington 98033 Trails Construction & Planning: J Conservation Resources, Inc. P.O. Box 31102 Seattle, Washington 98103-1102 3 ---PAGE BREAK--- t: .M N .O n: .Q • . · • {."SS q j" . L : \ Table of Contents 4· Executive Summary Master Plan Recommended Trail Use Plan Introduction Creating A Watershed The Interlocal Agreement Planning Process Site Inventory Soils Slopes Hydrology Vegetation Wildlife Utilities Existing Trails Soils Map Slopes & Landforms Map Hydrology Map Vegetation Map Utilities, Historical, & Current Land Use Map Exisiting Trails Map Site Analysis The Opportunities and Constraints Plan The Development Rating Plan Opportunities and Constraints Map Development Potential and Constraints Map Master Plan Master Plan Guidelines Trail Alternative Plans The Recommended Trail Plan Trail Development Standards Trailhead Services Unique Places The Interpretive Program Informational Signage Architecture Construction Cost Estimate Summary Annual Trail Maintenance Costs 80 Acres Detail Site Plan Conclusion 7 9. 11 15 16 16 21 21 22 23 23 24 24 27 29 31 33 35 37 41 41 43 45 49 51 51 52 54 55 55 56 57 58 58 59 63 NAKANO · DENNIS LANDSCAPE ARCHITECTS I. ---PAGE BREAK--- r r ( r Appendices Appendix 1: Geotechinical Preliminary Site Evaluation 65 Appendix 2: Wetland and Wildlife Report 79 Appendix 3: Surveys of Wetlands and Trails 105 Appendix 4: Plant List of Major Vegetative Areas 117 Appendix 5: Utility Inventory 123 Appendix 6: Trail Survey Example 131 Appendix 7: Trail Plan Alternatives A, B, C, Options 1,2 143 Appendix 8: Interpretive Graphics 157 Appendix 9: Detail Cost Estimates for Option IA Trail Plan 163 Appendix 10: Bibliography 167 REDMOND WATERSHED MASTER PLAN 5 ---PAGE BREAK--- ---PAGE BREAK--- The paramount goal of the Master Plan for the Redmond Watershed is to preserve and enhance the diverse habitats of the site while providing recreational and educational opportunities. The proposed improvements and renovations are sited to produce minimum impact to the site. The goal of educating users supports the goal of habitat preservation. Education about habitat, habitat preservation, wildlife, resource conservation, and hydrology will directly enrich the visitors' experience of the site and provides indirectly for the preservation of the site itself. The Redmond Watershed is an 800 acre second growth forested site located east of the Redmond central business district, north of Novelty Hill Road. Although it has never served its originally intended purpose as a true watershed, the site has become a valuable natural and recreational resource for the region. In 1989, the citizens of King County passed an Open Space Bond which is the source of funding for · the preservation and improvements of the Watershed. An Interlocal Agreement between the City of Redmond and King County outlines the program for the site. The Redmond Watershed is to remain in passive recreational use for the public in perpetuity, except for the 80 acre parcel south of the Puget Power right-of-way which can include active recreation, buildings, and parking. Other provisions of that agreement include the banning of all motor vehicles except for emergency and service vehicles, provision for connection of Watershed trails to a future regional trail network, construction of support facilities for the regional trails, and future paving of the East/West regional trail through the Watershed. The City of Redmond hired a team of consultants headed by Nakano• Dennis to prepare a plan for the site. The Redmond City Council and Redmond Parks Department authorized and appointed a Steering Committee to work with the consultants in reviewing concepts and making recommendations for the Master Plan. The design team conducted a site inventory of the Redmond Watershed using both available mapped information and on site investigations. The site itself yields the most important information both of a quantitative and qualitative nature. An inventory of wetlands and wildlife was compiled for the 80 acre parcel and for areas along the existing trail corridors in the upper 720 acre area. A thorough inventory of the existing trails yielded information about the evolution of the trail system and the physical condition of the trails. Out of the information and impressions gathered, an ecological approach to planning for the Redmond Watershed has been developed. An Opportunities and Constraints Plan identifies ecologically sensitive areas, areas of interpretive interest, and areas where new trails could offer access not available in the existing trail system. A Development Rating Plan rates the site in five categories from most to least restrictive for development based on value of habitat for wildlife, sensitivity to disturbance, presence of priority wildlife species, degree of habitat REDMOND WATERSHED MASTER PLAN Executive Summary 7 : • . • • • • . -j : ) : • • • . . . ---PAGE BREAK--- 8 disturbance, and adjacent land use. Implicit in the rating system are the values of preserving and enhancing habitat diversity, providing education, and offering recreation. A variety of plans have been developed and considered in a process which has included input from the public, Redmond City staff, the Steering Committee, the Parks Board, the Redmond City Council, the Audubon Society, and the team of consultants. In order to evaluate the Master Plan, the Steering Committee and the consultants developed guidelines and recomm.endations which balance the goals of site preservation, user safety, and fairness to existing and potential users. This provides a means of evaluating the merits of the alternative plans relative to project goals. Siting is an important means of preserving the site while providing educational and recreational opportunities. The proposed Master Plan: • Preserves sensitive wetland habitats by restricting trail access to the perimeter of the largest wetland areas. • Allows only lowest impact foot trails and boardwalks in or adjacent to sensitive areas. • Includes an equestrian loop trail which allows that user group to segregate itself from bicyclists at the trailhead. This segregation is desirable for safety reasons. • Locates bicycle trails on a flat area in a relatively tolerant forest habitat. • Locates maintenance, emergency, and police vehicle access in the already impacted utility corridors. • Eliminates existing trails in an area at the north end of the site which has steep slopes and stream corridors. The proposed improvements to existing trails will minimize future impacts to natural systems. Erosion of poorly sited trails, widening trail treads on poorly constructed trails, siltation of streams at trail fords, and invasion of non-native plants will be minimized by implementing the proposed plans. The proposed designation of trails for specific use groups based on ecological criteria will further reduce impacts relative to the existing situation. The Master Plan and the construction phase which will follow are one step in the evolution of the Redmond Watershed. Opportunities to understand and experience the Redmond Watershed's diverse habitat via educational tours, interpretive signage, and community school sponsored improvement or volunteer maintenance projects will provide the visitor with a deepened understanding and appreciation of the site and the natural world in general. Over time it is the involvement of the immediate and wider community which will preserve this valuable resource for future generations. NAKANO · DENNIS LANDSCAPE ARCHITECTS ---PAGE BREAK--- I , I ( I r INTRODUCTION REDMOND WATERSHED MASTER PLAN ---PAGE BREAK--- ---PAGE BREAK--- f [ Redmond Watershed Preserve City of Redmond Department of Parks and Recreation NAKANO♦ DENNIS LANDSCAPE ARCHITECTS TRAIL USE PLAN OPTION 1A KEY © Parking Regional Trail - • - • - 1Multi-use Trail - - - - Equestrian Trail Bicycle Trail Foot Trail r NUITII SCALE , • • •oo·-o· ACIBS ---PAGE BREAK--- ---PAGE BREAK--- Potential Trailhead ( I I N<1uti1Uon1 MC rww 10 •ॷuiR : ll aJu h1101hl)' will un wh&l prupcny U. .:4uimi .,,,jll incl....k pa\'CJ p,uॸ1n1 lur IUkU wilh 1 bil:)'dt -ॹ•na,u..wt bic,ck: r1d.1 and lll'<'Clॺin4f1,111huii,c•ailtrri11 ith ucrin1 uwsh.& and hnchina r.i.il1. ltolh will be rur lhc l'UU\IUffl, 61H, bua,J and c,aithuJJ. Tk,c knu."l, •ill r..:1liLll1C We and cumcniicnt10:l·ui,.1ulhc1i1t. 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An luW UI Ji1v1,, in Lhi1 111::1 i:uulJ illu>.1111.t lO!''bl Wl,'1,0,ॿi•WI. Nbi1.&1J11c11i1y,.,...iN1i.-cph.rnঀ1.aliUotU.. Trail Thi1 pri1ui1i,c ar.jl UIJ bu.u1h•al ..,uuJJ pru•iJr: Ill chc rJs:c ul a 1 ,c 11,rn _tl,.uJ anJ a fi•c•ICJ .....:1Luld II.I 1h1, 11u be o·,11 hk 1,11111 kJ h1lc" UC""'p!•nl .,.jll 1,,1/lu r1• n.i1o11r .i..Jy, ilJlifc phokl11i6phy. aoJ .u'k:h"11 p.i1wn1 WIii, 11,d M11e1P'c1iu ,ian.iic a11hh ,111: noulJ cJ llk chc "u.i1<• 1ta1111 lhc rule ul -.cil4111.b Ill J.1111111 111:1,111,rmrut 11iJ &1 .,iJbiccl.lin•wcu. Ì-----Wetland Preserve Thi11,.,.,ac wcll..W wbidl in1:hdct 111111tc:1 u/ up:11 wKt' •lia;Mw:nl 1,1,ill be rotn,:1el.l 1u W cl.l10 u r 1hr \ll'ctliAIMI lcuinJ 1l111c uu1.11iJi1,4u1bcJ. 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Area Tn.ih and r-.'ili1k:1 wiU1'nllid lhc:prrimc11ttuflht MK a,.1)11:cnt 1u priui.r pupcrlia. llcW,r 1 1Uh whit.:h l'UMa..'1 1hc: M11: &upivllC (Nuprn)' will be bkd.rJ am! pc:1h.pl w,1ঐJ IU l"C\Cl\'C , ul aJja'Cnl l&l,d u nco.. '-----Potential Site Entry Trail A muhi•u.-.c cnay nil tuddlUVICICt W We w the aJও• nc:11hb.■huuJ &111111,1ঔ lknlupuicl\l 1.a:1:un Scr,kc.1 ..,ill irv:luJr pocJ p.,'lin1 riw 11o11u1 wilh 1 ti.·7,·k an:■ anJ bi.:Jt.:lc anJ 11awcl p..,'-in4 lut huu.c •aikr ria• w111:rin1 trova;"111,Jhu,.:h1n111ib. iki4h•iltbc:nc111hc n:,uwm, pk'nic aru. infi.wn11uun bu&,J, ll/lJ lllc,c Ər"kc:1 •111 l11:iliu.1e urc anJ Ï I d II) \ - 'c \ \ RegionalTrails Open Water Wetland t I I I I Fuur opc:11 wa1c, w11&Nh in the ufrcr কখগfঘ c wঙচছ-:; r ur pluiu. Addill\lr'III J, •rtlM!l, IW'IL1 Utl IU জvn1■.in arid 1lu,. ঝunol( and tu rc:ch&lsc waler. a,,JHfC&nll. Trout Stream aibiJW')'. The Wuhinp. Dep,nncn1 ul 19Kit1. AA:cu.. to &hণ an::1 wwlo1 be 1u11.tbk unlr 11,1 hihra. Trail conwna.'1iua. mc1hucb. 111..ii rM.,,J bJ.an.tw1l.t will lhc.in:n ll'\.al lm,-.1.1. An ul'M1e lula't wiJ w&n•SC ill induJr: intumতtul'I abuut cu11hru.1cruut Future Ballfields \ \ l'u..-cr ri1hH-'•-•1 l'III he' uw:il fo, ,i ie n:•uaUUfl uuJr:r the uf' W IMaka-al AJ1Un1Clll. 8crau,c ur o"inai111Cntal -S t.:uik turnu1ill t anJ cin.11la1iua IA'lly 1 1111■ll1lltl1C1011ih.,,.n.11·1.KT1Crul1hi: Weu1.!1c:J i11Wuibk flM b.llliclJ dnclupncn1. School District Property 't a of Tiw UM' Wl.lllinp.m 51.·'-I l>i.a.rii:I J..c& nul f or u dr:'f'duptd 111 Jol'htAII, lhc: W11Cr1hcd wwlJ pu-.* c:&&:c:tlr:n1 wuuc, ru, icn1.ir-. .audr br the: ..ii.Juiu.. In ana11,cmcn( •iah W S.:huul OUukt. ru,় JCtu.il pa,tin1 Ml rwW pn,1oiJc: P611,,,";J Waicn.hcJ 11,c:flr, Mid in :.:a"u1e ::::tuw.i be .knlupc:d Redmond Watershed Preserve City of Redmond Department of Parks and Recreation NAKANO ♦ DENNIS LANDSCAPE ARCHITECTS MASTER PLAN KEY Regional Connector Trail Muhi-use Trail Eques1rian nnd Hiker Trail Bicyclo nnd Hiker Trail !liker Only Trail lঞIC 1nul1i•u11r trlih will bn:umc p,arl uf • rr,:M.KW ul Lia.ii, 111 1i1111r in lhc: lu11uc. lhc: uuJ u,a lhc:.c 1111ih •ill be II r«1 •Mk mini,11um infoট ptwc :;trlic: ÐÑ:fi':la ulU111,1clr be• ll haot pn,: J u.il wil • p.111Jlcl idl 1111hic:c huuc luil. nunhlwulh will be Ill I (UUI wit wif1111:c tr11il w11h a p.uঠlkl w,h 111rh11.'C hwlc: ulli.l. Native Shrub Plantings c ,থদiধ I নপ:! will mccl lhc: tu.ibilil)' 111111 a.nu uldlC ফiric mon:ÓÔrÕÖir1:;×tr.hØÙÚ':'iÛÜÝ llftibc:lfC waluc: ul Mliwc plDU wiJ iafwwe m wlw..l iur:IQI ul W twridut. Mr:ea ,.,.ilablc -.la W 1.-rlucal °'poc:mcaa alluws p.nal ul I IIM!b plantin, 111.i cmc: for lh£ Loop Trail ni1 lwria-fn:ie 1ctn1.aolc n1I a-idli I tlank.cd. paved, ar bo1nlw11l .wrfব lwl UIC .,li.Mu, 1M1111h M4 ••ICf' "lwwh 111d upland fwni.. llk i•ভ•prUi\'C paoich mouম •luns 1hu. 1o.-..p illuwa.11: lhc link lA' habiu,1; diwcn.il.y -t h■biu.i"•luc,iuwikllifc. _ Environmental Learning Center EJuutiufl 1 primlt')' &ual ul lhc লr Piatt Thi1 f11:ility, P,UfVl,CJ fut• fU111n: ph.t,"C. induJo 111nall buililin1 wllh Cl&J.IIUJnl 1nJ ullkc "t*C, 111 W•lf pai•illf, a,)J Jua-111.l.'CH IU lhc l..,up 111.il. The buil1 f•:illl)' u. nu1 wilhin lhc: •lfC u l 1hc bu.Jjc1 1n1lablc unJc, lhc: lnicrk,.:al A"cc:nicnl, W 1hc kcdiuund Ra·n:&l.MI llicpM1men1 h pl&M!" inll:•li'IC k.ou.U, ot lhc Wic. EJu,:a1iun chc •l)!llln:1:,,IM.n ■nJ 1C'f"t'll It.-h.ibi1.i whk·h an cশ-rnliষI C'lc:nicnl 111 the 1,11c:1c:r,,,1iuu ul 1luসM!< a:,J হ..iu;,,J c.i.:mpkn,, 1cN:n,1!1, Facility A .hop াWin& wtlh. িil."C rard will pnn,it.lc and rn..11:rial )lun&C, • ,,u1II ut'fi,"C lf)&'C, Mii WYl\..t.,.,p / m + c rwun: a Cit)' lীnpuুn, lrM ূry Mic n1■y be eJ.kd in lhc SCALE I" 400'-0" r=tJ 400 100 9 FEETIMILES iAI IJ4 n NORTII Þ ACRES 1/2 ---PAGE BREAK--- ---PAGE BREAK--- f f Primarily a forested area, the Redmond Watershed is an 800-acre parcel of land containing several wetlands and streams populated by a variety of birds and animals. Located adjacent to Novelty Hill Road in Redmond, Washington, it is also used by the local community for biking, jogging, horseback riding, and mountain bi.king. It is the existing trail system on the site which serves as the basis for the community uses. This system bas been established not only by users clearing vegetation, but also by the utilization of existing dormant railroad grades and skid roads. Prior to 1926, the Redmond Watershed bad been a source of timber, and these now dormant rail lines traversed the site to serve the logging industry. Due to population growth in the region, recreational activity bas increased in the watershed. Recreationalists travel from all over the King County area to use the site. The Redmond Watershed's popularity will continue to grow as development of surrounding areas increases. Future connections to the regional trail network will further increase the number of users. In 1926, in order to create a watershed and supply water to the city, the City of Redmond purchased 160 acres from the Weyerhaeuser Timber Company for $1000. Following that purchase, two dams were built across Seidel Creek and a pipeline was built to carry water to the city. Subsequent purchases to protect the water quality were made. In 1942, 320 acres was purchased from Weyerhaeuser for $1500; 160 acres from Silver Logging Company in 1943 for $3200; and another .160 acres from Silver Logging Company in 1944 for $2800. Additional dams were soon built, but when the water failed to meet Washington State Health Department standards, the watershed was abandoned as a city water source. Remnants of these dams remain on the site, and beavers have built additional dams adjacent to the man made structures. Subsequent developments include construction of major utility corridors through the site. In 1956, Pacific Northwest Pipeline Corporation built two gaslines which run north to south in a 200 foot wide easement. In 1965, an overhead power line was built by Puget Sound Power and Light Company in a 200 foot easement which runs east to west across the Redmond Watershed. In 1970, the Redmond City Council planned to construct an airport and an industrial park in the Redmond Watershed. This plan was abandoned after a study by the Redmond Planning Department and a subsequent public bearing. A study by McConnell/Burke completed in 1985, identified several potential uses for the site including a city nursery, golf course, firing range and urban development. That study offered a series of plans from REDMOND WATERSHED MASTER PLAN Creating A Watershed 1 5 ---PAGE BREAK--- The Interlocal Agreement Planning Process 1 6 low intensity use to high intensity use with each of the plans setting aside an area around Seidel Creek as a natural area. None of these plans were ever implemented. Adjacent land uses, current and future, arp a significant factor to be considered in planning for the Redmond Watershed. Subdivision developments have bet;n built to the north and south of the site. Privately owned land to the east and southeast of the site is currently under consideration for Master Planned Development. While these may not be approved, some type of development will eventually occur on that land. As regional population grows, the trails in the Redmond Watershed will need to accommodate increasing use. In 1989, the citizens of King County passed the Open Space Bond aimed at reserving park lands to serve the growing population of this region. Some of that money was allocated for the Redmond Watershed. To execute the planned improvements, King County and the City of Redmond entered into an "Interlocal Cooperation Agreement for the Development of Redmond Watershed Trails". That agreement sets some parameters and requirements for the programming of the site. The Interlocal Agreement states in part "as a condition of the use of bond proceeds for the trail system project, the Redmond Watershed Property must be preserved and remain in passive recreational use by the general public in perpetuity, except for up to eighty (80) acres, which may be devoted by Redmond to future active recreational use". Further provisions of the Interlocal Agreement include: • the banning of motor vehicles (except for emergency, maintenance, and motorized wheelchairs) • provision for connection of the Redmond Watershed trails to the planned regional trail network • construction of support facilities for the regional trail network • confinement of active recreation and parking to the 80 acre area south of the Puget Power right of way • future paving of the East/West connector trail. The City of Redmond selected Nakano• Dennis and a team of sub consultants to prepare planning and construction documents for the implementation of the Redmond Watershed improvements outlined in the Interlocal Agreement. The Redmond City Council and Redmond Parks Department authorized and appointed a Steering Committee to work with the consultants in reviewing concepts and making recommendations for the Master Plan. Members of the Steering Committee include representatives of the NAKANO · DENNIS LANDSCAPE ARCHITECTS I I ---PAGE BREAK--- r ( Redmond City Council, the Redmond Parks Board, the Trails Committee, King County Parks Department, the Redmond Parks Department, and community members representing the primary user groups. Nakano•Dennis assembled an interdisciplinary team to look at all aspects of the Redmond Watershed site in developing a Master Plan. The delicate balance of preserving the site, accommodating user demands, and ensuring trail safety is the major task which faces the consultants and the Steering Committee in preparing a Master Plan. That balance has been achieved by soliciting and evaluating the concerns of all interested parties: • Members of equestrian and bicycle organizations have made their desires and concerns known both via public comment and through their representatives on the Steering Committee. • Representatives of the Trails Committee on the Steering Committee have provided historic knowledge about how the site has been used and physical knowledge of the land and the existing trails. • Various public entities have conveyed their comments and concerns through their representatives on the Steering Committee. • Input from the general public was obtained in a forum sponsored by the City of Redmond. This process generated a broad range of opinions and concerns, particularly in the area of trails planning. Input from these sources exposed some conflicting concerns. The Parks Board suggested that the Steering Committee establish guidelines for evaluating alternative plans to justify their decision making process. These guidelines are included in the Master Plan section of this report. REDMOND WATERSHED MASTER PLAN 1 7 ---PAGE BREAK--- ---PAGE BREAK--- { ( f I l · SITE INVENTORY REDMOND WATERSHED MASTER PLAN ---PAGE BREAK--- ---PAGE BREAK--- f Published sources and site reconnaissance provide data about the Redmond Watershed. These published sources, such as topographic maps from the United States Geological Survey (USGS) and soil classification maps from the United States Department of Agriculture (USDA), have provided valuable information about the site. However, it is the site itself which bas provided the most valuable data. The Redmond Watershed is best appreciated by actually experiencing the beauty of its forests, streams, and wetlands. The analysis of the collected data and the considerations borne out of impressions of the site both contribute to development decisions. Based on the maps obtained from the USDA and USGS, the soils map Soils indicates that most of the Redmond Watershed soils are in the Alderwood series. There are two categories of Alderwood-gravely, sandy loam which can be found on this site (one in areas over 15% slope and the other in those under 15%). These soils, formed over glacial till, are moderately well drained, have moderate to severe erosion potential, and produce slow to medium runoff. Severe erosion potential occurs on steep slopes without vegetative cover. What this means is that once organic matter bas been removed from the surface, these mineral soils are sufficiently stable and well drained for the construction and maintenance of properly engineered soft surface trails. The other soil type to be found in the Redmond Watershed is Seattle Muck, an organic soil derived primarily from sedges which forms in poorly drained depressions and in stream valleys. These soils are poorly drained, have little or no erosion potential, and runoff is ponded. The Soils drawing illustrates the extent of those soils. Seattle Muck is not suitable for trail construction under most circumstances. USGS maps indicate that some of the site's soils are formed over glacial outwash. Soils formed over outwash generally have better drainage and less runoff than soils formed over glacial till which is more compacted. Mapped soil information is confirmed through on site investigations by the geotechnical engineer. Test pits have been dug in areas proposed for development of parking areas, buildings, and drain fields. Local soil conditions will be more thoroughly investigated by the geotecbnical engineer during the next design phase (the results of the preliminary survey are found in Appendix This will be particularly important in the area which bas been used as a city refuse site. The slope map illustrates not only the steepness of the site, but also the major landforms and features in the Redmond Watershed which include: REDMOND WATERSHED MASTER PLAN Slopes 2 1 • • • : • • • • • • n • • • • • • • • • • • • • h • ❖ • • • • • • • •R • • • • • • • • • • • • • • • • • • • • : • : : • • • • • • : • • • • : S :R.-T:U:T : • • H • : : • • • • • h • • • • • • : • • V- • • • • • • .W • • • X • • • • ---PAGE BREAK--- Hydrology 22 • a large plateau area which makes up the east half of the site • · the Seidel Creek valley which is flanked by very steep slopes east of the creek, and more gentle slopes west of the creek • another smaller plateau located at the south end of the site which forms the high ground of a ridge which runs north to south along the west boundary of the Redmond Watershed. • topographic depressions in relatively flat parts of the site at the east boundary, the northwest comer, and the southwest which collect precipitation and runoff to form wetlands. The City of Redmond Sensitive Areas Ordinance Section 20C.40 classifies areas exceeding 15% slope as sensitive areas. Restricted activities include filling, dumping, excavation, clearing, grading, and construction. However, the following activities are exempted from these restrictions: • educational activities • scientific research • "outdoor recreational activities including but not limited to interpretive field trips, bird watching and hiking, that will not have significant effect on the sensitive area." • trails under 8 feet in width The Redmond Watershed includes a number of streams in the Lake · Sammamish Basin: Colin Creek, Seidel Creek, and a tributary of Mackey Creek. Within the site these creeks form three sub-basins of which the Seidel Creek Sub-basin is the largest. A small area at the northeast corner of the site is in the Snoqualmie River Basin. Wetlands, because of their special role as wildlife habitat, aquifer recharge, and storm water retention, are important natural resources. Open water areas, in association with other wetland types and upland habitats, provide particularly rich wildlife habitat. A number of open · water wetlands are located in the site: • one straddles the east property boundary line • one occurs at the confluence of the Seidel tributaries in the northwest corner of the site • one is near the south border of the site • a small one is in the northwest comer of the 80 acre parcel located south of the powerline • some smaller wetlands in the 80 acre parcel have an open water component A total of twelve wetlands have been delineated and surveyed in the 80 acre parcel. In addition, wetlands located near the existing trail system have been delineated and surveyed (see Appendix The location of the two major wetlands at the east and west boundaries of the site have been determined by USGS Maps, USDA Maps, and aerial NAKANO · DENNIS LANDSCAPE ARCHITECTS ---PAGE BREAK--- [ f photos. There are wetlands on the Redmond Watershed site not shown in the Hydrology map, because the cost of delineating all the wetlands throughout the site is prohibitive. However, wetlands will be delineated near the location of proposed new trails. The Redmond Watershed is primarily second growth forest with canopy cover over most of the site. A broad range of typical Northwest plant associations are represented including conifer forests, broadleaf forests, and mixed forests. The Vegetation map delineates the configuration of the major vegetation categories in the site. Appendix 4 includes an inventory of the plant species found in each of those major vegetation types. Within those broad categories, moisture and age are the primary determinants of the vegetation community. A number of plant associations of interpretive interest have been identified: • open water wetlands • forested wetlands • hemlock forest • coniferous successional forest • cottonwood forest A small percentage of the site is without forest cover. • The utility corridors: where trees are regularly removed to allow aerial monitoring, access for repairs, and to prevent foliage from growing into the overhead wires. • The larger open water wetlands • An area of windfalls located near the southeast property corner at the east end of the notched boundary • The city's refuse site in the lower 80 acres While most of the site supports native plants, some exotic plants such as Scotch broom and Himalayan blackberry have invaded disturbed habitats, notably the utility corridors and refuse site. The diversity of native vegetation types is a significant factor influencing the presence of wildlife. The forested areas of the Redmond Watershed are contiguous with larger forested areas extending east to the Snoqualmie River. The diversity of habitats offers food, water, and shelter for birds and other wildlife. The extent of the habitat provides sufficient range to support large mammals such as black bear, black-tailed deer, and coyotes. These mammals may disappear from the site in time, as development to the REDMOND WATERSHED MASTER PLAN Vegetation Wildlife 23 ---PAGE BREAK--- Utilities Existing Trails 24 east reduces their range and interrupts forest corridors. Many songbird species, and some raptor and water bird species have been sighted in the Redmond Watershed by the team's biologists. The site's wildlife bas been surveyed throughout the 80 acre site and in the vicinity of the existing trails in the upper 720 acre site. A wildlife report and list is included in the Wetland and Wildlife Report in Appendix 2. The bird list is not a complete list of species living on the site, however it does illustrate the broad range of bird life present. Among the species observed is the pileated woodpecker, which bas been designated a priority species by the Washington Department of Wildlife. A number of small mammals, reptiles, fish, and amphibians were also observed, including another Washington Department of priority species: cutthroat trout. Fingerlings of this species were seen in the Mackey Creek tributary at the south boundary of the site. These observations of numerous species clearly indicate the value of the site as wildlife habitat. They also suggest a direction for the interpretive planning for the Redmond Watershed. More habitat and wildlife study will be conducted along corridors for proposed new trail alignments during the design phase to evaluate the appropriateness of the proposed locations. Although there are major utility corridors passing through the Redmond Watershed, there are currently no utility services connected to the site. However, water and electrical service are reasonably close to the site for connection. The Redmond Watershed is bounded by three water districts which have main lines in proximity to the site. The area is currently in a disputed water service area with both the City of Redmond and Union Hill Water Association laying claim to the area. No sanitary service lines are located near the site, and the existing developments in the project area are on septic field systems. Preliminary investigations by the team's geotechnical engineer indicate that the site soils will support a drainfield. Preliminary calculations by the civil engineer indicate that storm water detention will be necessary to process runoff from the buildings and paved areas proposed. A Utility Inventory prepared by the team's civil engineer gives more details about utilities in Appendix 5. A thorough inventory of 9-1/2 miles of existing trails in the Redmond Watershed by Conservation Resources lnc., the team's trail consultant, provides pertinent information about trail mileage, trail tread material, clearing and tread width, side slope, steepness, and overall condition. This data was averaged over each segment of trail and again over the NAKANO · DENNIS LANDSCAPE ARCHITECTS ---PAGE BREAK--- { entire site. The Trail Survey Summary is included in Appendix 6. Trail surface conditions in the Redmond Watershed clearly need improvement. Current trail conditions in the Redmond Watershed reflect the fact that trails were never deliberately located, but were user developed. Trail treads are not properly drained and are highly subject to erosion. Mud, pooling of water, and exposed tree roots and rocks are common throughout the trail system. When a puddle forms on a trail users tend to bypass it and widen the area around the puddle. Trail tread materials do vary over the site, but two types of surfaces are most common: • The old railroad grades are usually raised above the surrounding area and are formed of compacted mineral materials which have stood up well to use. • Those trails established by informal human use have a layer of organic soil over mineral_subgrade. They tend to be muddy and puddled not only because of poor drainage, but also because they are often recessed into the surrounding grades. The average tread width over the system is 4-1/2 feet, which is relatively wide. Clearing width or travelway varies over the Redmond Watershed, with the average being 7 feet. The utility corridor has a relatively narrow travelway of 4-1/2 feet because of the high brush encroaching on the trail. On the other hand, trails in the conifer forested area are generally wider because the understory is very open and the trees are more widely spaced. For example, Trail 14-15 has a travelway of 7.5 feet. This is a useful point of comparison for evaluating the impact of future trail development. Side slope is the percent of rise over run measured perpendicular to the trail. Side slope provides drainage for the trail tread. Most of the trails in the Redmond Watershed have zero side slope which is typical of trails which are established by users in relatively flat, easily accessible areas. The lack of side slope contributes to puddled, muddy trail conditions. The average side slope of the existing trail system is 1.5%. New trails will have 2% side slope where possible. The trail inventory also includes graphic profiles of the existing trails. Because much of the trail development is concentrated in the flat plateau area the average steepness or grade is low. However, there are some very steep grades of up to 40%, specifically in the utility corridors. These steep trails will need to be relocated to reduce difficulty and erosion potential. Trail steepness, or grade, is calculated by dividing the rise by the run along the trail. The trail inventory supplied two different types of information regarding grade: absolute grade and average grade. Both indicators of trial steepness are expressed as a percentage. Absolute grade reflects the degree to which the trail is steep, while average grade indicated the gain or loss of elevation over the entire length of the trail. REDMOND WATERSHED MASTER PLAN 25 • ---PAGE BREAK--- 26 Analysis of both average and absolute grades for the existing trail system is an essential component of the trails planning process. To minimize recreational impacts of natural systems and to ensure use safety, overly steep portions of a trail must be relocated. The trail survey identifies about 2 miles of trails needing relocation. The popularity of Trillium Trail may be related to its varied topography, its meandering alignments, and its enclosing forest canopy. This suggests that new trail development should include these characteristics typical of forest trails. The proposed trail system will better withstand impact not only because of improvements in drainage, surfacing, and grade, but also due to improved trail maintenance. Maintenance of the existing trails cannot be readily undertaken now due to the extensive drainage problems which can only be addressed by reconstruction. NAKANO · DENNIS LANDSCAPE ARCHITECTS ---PAGE BREAK--- Redmond Watershed Preserve City of Redmond Department of Parks and Recreation NAKANO • DENNIS LANDSCAPE ARCHITECTS SOILS KEY ALDERWOOD SANDY, ALDERWOOO SANDY, Eli. SEAT!l..E MUCK • •USOAS... ( \ r NORTH SCALE 1• • -400'•0• ACRES ---PAGE BREAK--- ---PAGE BREAK--- Redmond Watershed Preserve City of Redmond Department of Parks and Recreation NAKANO • DENNIS LANDSCAPE ARCHITECTS SLOPES & LANDFORMS KEY c=J C5 SLOPE IHHHi:EiH EillIIillill 111111111111 a LD i,-i. SLOPE 15 1o JOii, SLOPE > JOll,SLOPE ( \ r NURTII SCALE 1 • • ◄00'-0 ACRES ---PAGE BREAK--- ---PAGE BREAK--- { Redmond Watershed Preserve City of Redmond Department of Parks and Recreation NAKANO • DENNIS LANDSCAPE ARCHITECTS HYDROLOGY KEY _ j OPEN WATER A.000 IIAZA.RD AREA WEJUND MAJOR DRAINAOE BASIN BOUNDARY PERENNIAL STIIEAM MINOR DRAINAGE. BASIN BOUNDAll.Y ot• -•--•USOSW.,.USIM C-J . • SCALE 1 • • ( r n NORTH ACRES ---PAGE BREAK--- ---PAGE BREAK--- l Redmond Watershed Preserve City of Redmond Department of Parks and Recreation NAl(ANO ♦ DENNIS LANDSCAPE ARCHITECTS VEGETATION KEY CF BF MF s ow G * CONIFEROUS FOREST BROAOLEAF tOREST MIXEDRJREST SCRUB/SIi RUB OPEN WATER Wal.AND CRASSLAND Pl.ANTCOMMUNITT OF INTEkPRl:.71YE INTEREST ( \ ) n NORTH lid SCALE 1· • •oo·-o· ACK ES ILi cFE 1 :TrMILES ---PAGE BREAK--- ---PAGE BREAK--- [ Redmond Watershed Preserve City of Redmond Department of Parks and Recreation NAKANO ♦ DENNIS LANDSCAPE ARCHITECTS UTILITIES HISTORICAL & CURRENT LAND USE KEY MPO BOUNDARIES EASEMEl10" YES SATURATED YES 2.5 Y 3/2@ 1-10" YES SATURATED YES l 42 2.5 Y 3/2 YES VERY DAMP TRANSITION t 43 2.5 Y 4/2 YES SATURATED YES 44 10 YR 3/4 YES DAMP NO 45 10YR3/4 NO DAMP NO l 46 10YR3/4 YES DAMP NO 47 10YR3/3 YES DAMP NO 48 10 YR3/6 NO DAMP NO 49 10 YR 3/3 YES WATER TABLE YES 50 10YR3/2 YES SATURATED YES 51 10 YR 3/2 YES SATURATED YES 52 10 YR 3/3 NO DAMP NO 53 10 YR4/4 YES SATURATED TRANSITION 54 10YR3/3 NO DAMP NO 55 10YR4/4 NO DAMP NO 56 10 YR 2/1 NO SATURATED YES 57 10 YR 3/2 NO SATURATED TRANSITION 58 10YR3/3 NO DAMP NO 59 10YR2/1 NO SATURATED YES 60 10YR4/4 NO DAMP NO 1 3 ---PAGE BREAK--- TABLE II: SOIL TEST PIT DATA (cont.) 61 10 YR 3/2 YES DAMP YES 62 10 YR 3/4 NO DAMP NO 63 10 YR 3/4 NO DAMP NO 64 10 YR 3/1 NO SATURATED YES 65 10 YR 3/3 NO DRY NO 66 10YR4/3 YES SATURATED YES 67 10 YR 3/3 NO DRY YES 68 10 YR 3/4 YES DAMP NO 69 7.5 Y 3/4 NO DAMP NO 70 10 YR 3/3 YES DAMP NO 71 5Y4/1 YES PONDED YES 72 10YR4/4 YES DAMP ·NO 73 10 YR 3/3 NO DAMP NO 74 10YR3/3 NO DAMP NO 75 10 YR 3/4 NO DAMP NO 76 7.SYR3/4 NO DAMP NO 77 10YR5/2 YES SATURATED YES 78 10 YR 3/3 YES DAMP NO 14 ---PAGE BREAK--- ) I TABLE III: SOIL COLOR NAMES ' Soil Color Name 7.5 YR2.5/2 very dark brown 7.5 YR2.5/3 very dark brown 7.5 YR3/3 dark brown 7.5 YR 3/4 dark brown 10YR 2/1 black 10YR2/2 very dark brown 10 YR 3/1 very dark gray l. 10 YR 3/2 very dark grayish brown J 10YR3/3 dark brown 10 YR 3/4 dark yellowish brown [ 10 YR 3/6 dark yellowish brown 10YR4/2 dark grayish brown 1 10YR4/3 brown 10 YR4/4 dark yellowish brown l 2.5 Y 2/1 black 2.5 Y 2.5/1 black I 2.SY 5/2 grayish brown 2.5 y 3/2 very dark grayish brown l. 2.SY 4/1 dark gray 2.5 y 4/2 dark grayish brown t 2.5 y 4/3 olive brown SY 4/2 olive gray SY 3/3 dark olive 15 l ---PAGE BREAK--- TABLE IV: LIST OF WETLAND CLASSES COW ARDIN AND CITY OF REDMOND WETLAND CLASSIFICATIONS Wetland One Two Three Four Five Six Seven Vegetation Classes Aquatic bed Unconsolidated shore Emergent Scrub shrub Forested Aquatic bed Emergent Scrub shrub Forested Aquatic bed Emergent Scrub shrub Forested Emergent Scrub shrub Forested Scrub shrub Forested Emergent Scrub shrub Forested Emergent Scrub shrub Forested Redmond Classification * Type II (probable) 50-100 foot buffer Type I (probable) 100-150 foot buffer Type II (probable) 50-100 foot buffer Type II 50-100 foot buffer Type III 25-50 foot buffer Type III 25-50 foot buffer Type III 25-50 foot buff er * Wetland classification based on available information on off-site portions of wetlands. 1 6 ---PAGE BREAK--- l [ f 1 1 1 l I l ( I i r r Wetland Eight Nine Ten Eleven Twelve TABLE IV: LIST OF WETLAND CLASSES (cont.) Vegetation Classes Emergent Scrub shrub Forested Scrub shrub Forested Scrub shrub Forested Emergent Scrub shrub Forested Scrub shrub Redmond Classification * Type III 25-50 foot buffer Type III 25-50 foot buff er Type II 50-100 foot buffer Type II (probable) 50-100 foot buffer Type IV no buffer * Wetland classification based on available information on off-site portions of wetlands. 1 7 ---PAGE BREAK--- TABLE V: WILDLIFE OB SERVA TIO NS CommonName mallard* cedar waxwing Canada goose red-tailed hawk purple finch* Swainson's thrush brown creeper evening grosbeak olive-sided flycatcher American crow Steller's jay black-throated gray warbler yellow warbler pileated woodpecker western flycatcher Hammond's flycatcher* willow flycatcher varied thrush dark-eyed junco hooded merganser song sparro? black-capped chickadee* chestnut-backed· chickadee* fox sparrow black-headed grosbeak* downy woodpecker* hairy woodpecker* rufous-sided towhee western tanager common bushtit rufous humingbird white-breasted nuthatch violet-green swallow Bewick's wren winter wren American robin* solitary vireo Wilson's warbler Scientific Name Anas Bombycilla cedrorum Branta canadensis Buteo jamaicensis Carpodacus purpureus Catharus ustulatus Certhia americana Coccothraustes vespertinus Contopus borealis Corvus Cyanocitta stelleri Dendroica nigrescens Dendroica petechia Drycopus pileatus Empidonax difficilis Empidonax hammondii Empidonax traillii Ixoreus naevius Junco hyemalis Lophodytes cucullatus Melospiza melodia Parus atricapillus Parus rufescens Passerella iliaca Pheucticus melanocephalus Picoides pubescens Picoides villosus Pipilo Piranga ludoviciana Psaltriparus minimus Selasphorus rufus Sitta carolinensis Tachycineta thalassina Thryomanes bewickii Troglodytes troglodytes Turdus migratorius Vireo solitarius Wilsonia pusilla Habitat Type Codes M=Mixed forest C= Conifer forest W=Wetland Observation visual visual visual visual visual visual visual visual vocal visual visual vocal visual visual vocal visual visual visual visual visual visual visual visual visual visual visual visual visual visual visual visual visual visual visual visual visual vocal visual Habitat Type w M,D (flying over) D M M,C, W C M,D M,C D D,M M M M,C,W M,C,W C M M M,D w M,C,W,D M,C, W, D M, C, W, D M,W,D M M,W M,C, W M,W,D M,D M,C, W, D W,D M,C W,D M,C, W, D C,D M,C, W, D C, W, D M,W,D D= Disturbed-includes entry road, powerline, borrow pit and gas line * indicates nesting activities were observed 1 8 ---PAGE BREAK--- 1 { l ) 1 l l l TABLE V: WILDLIFE OBS ERV A TIO NS (cont.) CommonName Mammals and other wildlife: coyote porcupine Pacific treefrog blacktail deer cutthroat trout raccoon bullfrog douglas squirrel northwestern garter snake tadpoles rrouse black bear Scientific Name Canis latrans Observation visual, droppings scratchings visual Erethizon dorsatum Hyla regilla Odocoileus hemionus clarki Procyon lotor visual, tracks, droppings visual Rana catesbeiana Tamiasciurus douglasii Thamnophis ordinoides unidentified unidentified tracks visual visual visual visual visual Ursus americanus droppings, scratchings Habitat Type Codes M=Mixed forest C= Conifer forest W=Wetland D= Disturbed-includes entry road, powerline, borrow pit and gas line 1 9 Habitat Type M M M,C,W M, C,W,D w W, D w M,C D,W w M M ---PAGE BREAK--- REFERENCES Brown, E.R. 1985. Management of Fish and Wildlife Habitats in Forests of Western Oregon and Washington. USDA Forest Service, Pacific Northwest Region. Burt, W.H. and R. P. Grossenheider. 1976. A Field Guide to the Mammals. Houghton Mifflin Company, Boston. Cowardin, Lewis Virginia Carter, Francis C. Golet, and Edward T. LaRoe. 1979. Classification of Wetlands and Deepwater Habitats of the United States. U.S. Department of the Interior, Fish and Wildlife Service. FWS/OBS 79/31. Ehrlich, P.R., D.S. Dobkin, and D. Wheye. 1988. The Birder's Handbook, A Field Guide to the Natural History of North American Birds. Simon and Schuster, New York. 785pp. Federal Interagency Committee for Wetland Delineation. 1989. Federal Manual for Identifying and Delineating Jurisdictional Wetlands. U. S. Army Corps of Engineers, U. S. Environmental Protection Agency, U. S. Fish and Wildlife Service, U. S. D. A. Soil Conservation Service. Washington, D. C; Coorporative technical publication. 76 pp. plus appendices. · Johnston, Greg. The Watershed Company. Personal communication concerning study conducted in 1991. July 21, 1993. Kozloff, Eugene N. 1976. Plants and Animals of the Pacific Northwest. University of Washington Press. Maser, B.R. Mate, J.P. Franklin, and C.T. Dyrness. 1981. Natural History of Oregon Coast Mammals. USDA Forest Service, Pacific Northwest Forest and Range Experiment Station. Matthews, D. 1988. Cascade-Olympic Natural History. InterPacific Printing Corp., USA/Hong Kong. Munsell Color. 1992. Munsell Soil Color Charts. Macbeth Division of Kollmorgen Instruments Corporation, Baltimore, Maryland. Murie, O.J. 1975. A Field Guide to Animal Tracks. Houghton Mifflin Company , Boston National Geographic Society. 1987. Field Guide to the Birds of North America. National Geographic Society, Washington D. C. 464 pp. 20 ---PAGE BREAK--- \ f 1 I 1 ( [ t l ' REFERENCES (cont.) Nausbaum, RA., E.D. Brodie Jr., and RM.Storm. 1983. Amphibians and Reptiles of the Pacific Northwest. University of Idaho Press, Moscow, Idaho. Peterson, RT. 1961. A Field Guide to Western Birds. Houghton Mifflin Company, Boston. Reed, Porter Jr. 1988. National List of Plant Species That Occur in Wetlands: 1988,Washington. U. S. Department of the Interior, Fish and Wildlife Service. NERC-88/18.47. Robbins, C.S., B. Bruun and H.S. Zim. 1983. A Guide to Field Identification Birds of North America. Golden Press, New York. Soil Conservation Service. 1973. Soil Survey, King County Area, Washington. U. S. Department of Agriculture. 100 pages. Stebbins, RC. 1985. A Field Guide to Western Reptiles and Amphibians. Houghton Mifflin Company, Boston. Williams, R R M. Laramie, and J. J. Ames. 1975. A Catalog of Washington Streams and Salmon Utilization. Volume 1. Puget Sound Region. Washington State Department of Fisheries, Olympia, Washington. 704 pp. 21 ---PAGE BREAK--- ---PAGE BREAK--- APPENDIX 3 SURVEYS OF WETLANDS AND TRAILS REDMOND WATERSHED MASTER PLAN ---PAGE BREAK--- ---PAGE BREAK--- I I I I I I--I WETLAND 3 [ 0.55 ACRES (LOCATED) lYPE 11 (prob.) - . . - -··-WETLAND 1 ) '0r. 0.1 o ACRES (LOCATED lYPE II (prob.) WETLAND • 0.16 ACR D 6 lYPE Ill · -CRES • , • lYPE Ill . - WETLAND 7 0.18 ACRES lYPE 111 I ) WETLAND 2 · 1.89 ACRES . p (prob.).- 0.04 . ACRES · lYPE 111 ' WETLAND 12 . . - . . ws 0.37 ACRES lYPE 111 rl - J l2 -G . I I I (LOCATED) I I I I -I HwUi.-.}I I I Key Plan ' ICALl:1" •100' Exhibit Map Showing REDMOND WATERSHED 80 ACRES Wetlands delineated by The Watershed Co. no SeoAfl Sl.. W• 200 r NOOJ H20,IHJ NOTE: I i.wtK[Jltl 1-21, 11-11. 11-17, NfD 11-11 HOT f0UNl fl THC FlW>. UL w..11. I 1 I J 12.Jlt-lOO ---PAGE BREAK--- ---PAGE BREAK--- I l I :i 1 h I J: . 0 w 0 a. z g' - "i t:i :E O 0 U) z i!l of- w i Iii" jli lu11 I ;5 : : i5 I T _ 8 I I - 1 1 I I I I I I I I I I I 1 I I I I I ltt1 ---PAGE BREAK--- ---PAGE BREAK--- 0 ti Lo.I :r U) Lo.I Lo.I U) 1 "'t-r I I I \ , ' I • \ I • \ I \ \ ' , 0 01 ::EC ·3 _g ii Ul Lo.I Lo.I :r Ul Ul O m it:z g ifo:i; 3' 3: }.1Mt 0 U)l 0 Lo.I \ / I 0 Ci Lo.I :r U) Lo.I Lo.I U) . ---PAGE BREAK--- ---PAGE BREAK--- l. y O t l33HS 33S I I i 0 N uJ uJ Ill ---PAGE BREAK--- ---PAGE BREAK--- ,t ,J ,J C II ,J ,J II SEE SHEET 2 OF 4 j G· • I SGIIL[;f" •100" Exhibit Map Showing REDMOND WATERSHED TRAIL ETLANDS no 5-'lh lll,-d, SI + 100 WA. HOOl s.,4M'INl'20,1Nl Key Plan SHEET 4 OF 4 Ne. Ul1C4-100 ---PAGE BREAK--- ---PAGE BREAK--- APPENDIX 4 PLANT LIST OF MAJOR VEGETATIVE AREAS REDMOND WATERSHED MASTER PLAN ---PAGE BREAK--- ---PAGE BREAK--- CONIFEROUS FOREST Douglas fir Western hemlock Western red cedar Bitter cherry Vine maple Red huckleberry Hazelnut Salal Oregon grape Sword fern Foam flower Cascara Red elderberry BROADLEAE FOREST Red alder Black cottonwood Big-leaf maple Cascara Vine maple Red-osier dogwood Salmonberry Osoberry Hazelnut Sword fern Lady fern Piggy back Skunk cabbage False lily-of-the-valley SCRUB/SHRUB Salmon berry Thimble berry Bracken fern Red elderberry Evergreen blackberry Himalayan blackberry Spirea Twin berry Willow ---PAGE BREAK--- · MIXED FOREST • UPLAND Douglas fir Western hemlock Western red cedar Red alder Big-leaf maple Cascara Vine maple Salmonberry Hazelnut Sword fern Bracken fern Deer fern Dewberry Salal Oregon grape Red huckleberry Red elderberry Osoberry MIXED FOREST - RIPARIAN/WETLAND Western red cedar Red alder Black cottonwood Western crabapple Vine maple Salmon berry Spirea Willow Hazelnut Red huckleberry Red elderberry Devil's club Twin berry Lady fern Sword fern Skunk cabbage Water parsley Sec;jges Piggy back Buttercup False lily-of-the-valley ---PAGE BREAK--- SCRUB/SHRUB (CONT.) Reed canarygrass Small-fruited bulrush Horsetail Fireweed Self-heal Fescue GRASSLAND • PIPELINE Red alder Bracken fern Sword fern Lady fern Creeping buttercup Common plantain English plantain Large-leaf avens Watson's willow-herb Fescue Bentgrass Orchard-grass Reed canarygrass Small-fruited bulrush Spike rush Horsetail Soft rush ---PAGE BREAK--- ---PAGE BREAK--- APPENDIX 5 UTILITY INVENTORY REDMOND WATERSHED MASTER PLAN ---PAGE BREAK--- ---PAGE BREAK--- s V R D E s G N C REDMOND WATERSHED CITY PARK :August 10, 1993 UTILITY INVENTORY -Domestic Water and Fire Protection: 0 M p A N y .The Redmond Watershed property is bounded by three water districts. To the west is ·the City of Redmond Water District. They have an existing 6-inch line that extends northeast along Redmond Road to approximately 116th Street. From here the 6-inch ·line extends diagonally to the northeast to 209th Ave N.E., then runs north along 209th -A venue until approximately 126th Street. There is a moratorium on connections to this · -line due to existing capacity problems. Depending upon the master plan review for developments in the area east of the Watershed, the City of Redmond may consider this ·area within their service area in the future. The Union Hill Water Association currently serves the existing single family -development to the south, and also the small development directly to the east of the Redmond Watershed. Their service area northern boundary is the southernmost .Watershed boundary. The Association has a 10-inch diameter line located in Novelty Hill Road adjacent to the southeast comer of project site and an 8-inch line directly across Novelty Hill Road from the existing access road. This line could serve the -southern portion of the site. It should be noted that the Redmond Watershed is currently within a disputed water -service area. Both the City of Redmond Water District and the Union Hill Water Association lay claim to the area. The Woodinville Water District serves the area just to the north of the Redmond .Watershed. There is an existing 8-inch line extending along N.E. 133rd Street to approximately Colin Creek. The property which the City of Redmond is trying to purchase for the northern portion of the project is considered within the Woodinville Service area, and could easily be served by this line. The City of Redmond Fire Department has jurisdiction over the site. The assistant fire · marshal! indicated a probable maximum fire flow requirement to each parking area is 1,000 gpm. This flow will require construction of an 8-inch line. For estimating purposes it is assumed a watermain extension can be made from the existing lines in Novelty Hill Road and N.E. 133rd Street. The estimate assumes existing pressure and supply in these lines is adequate to support the additional service. page 1 ---PAGE BREAK--- s V R D E s G N C 0 M p A N y ·Sanitary Sewer: :The existing developments around the Redmond Watershed Project are currently on :septic field systems. The closest southern sanitary sewer service line is a line from the :city of Redmond extending to the intersection of Novelty Hill and Avondale Roads. :The City of Redmond has indicated they may be extending the service line along :Novelty Hill Road if the Quadrant and Port Blakely developments are approved. These .two developments are in the master planning phase. At this time it is assumed that the -restrooms will be on a gravity septic drainfield system. -The closest northern sanitary service is from the City of Woodinville service district. .Their closest line is approximately at the intersection of 172nd Avenue N.E. and N.E . .124th Place. There is no plan to extend these lines in the near future. It is assumed that the restrooms in the northern portion will also be on a septic drainfield system. -According to the USGS Soils mapping for the site area there are two types of soils on- site - Alderwood gravelly sandy loam and Seattle muck. The proposed drainfields . would be located within Alderwood type soils. Field investigation of local soil characteristics is required to determine whether suitable sites are available for drainfields. Storm Drainage: The topography for the northern development site is sloping east to west and is within the Siedel Creek drainage sub-basin. The southern development site generally slopes to . the southwest and drains to a creek exiting the site at the southwest comer. The southern development area includes a number of wetlands scattered throughout this portion of the site. The storm water system will be designed to conform with the DOE and King County Surface Water Design Manuals. Based on preliminary calculations detention will be required for both areas of development. An open detention and water quality pond is proposed for the southern developed area. A detention tank or pond is proposed for the northern site. Water quality facilities in the form of biofiltration swales are proposed for both areas. F:\93007\INVENT .REP page 2 ---PAGE BREAK--- Redmond Watershed Park Master Plan Estimate of Probable Utility and Parking Lot Construction Costs by: SvR Design Company, August 10, 1993 SvR No. 93007 South Parking Area North Parking Area Item Unit Price Unit Quantity Subtotal Quantity Subtotal Pavement Asphalt Concrete Pavement $40 TON 830 $33,200 245 $9,800 Crushed Rock Base Course $15 TON 2230 $33,450 655 $9,825 Curb Stop $25 EA 100 $2,500 50 $1,250 Storm Drainage Catch basin $1,000 EA 3 $3,000 2 $2,000 Storm pipe $25 LF 300 $7,500 200 $5,000 Biofiltration swale $30 LF 200 $6,000 200 $6,000 Detention Pond System $45,000 LS 1 $45,000 $0 Detention Tank System $35,000 LS $0 1 $35,000 Sanitary Sewer Septic Drainfield System, 2000 gpd $27,000 LS I 1 $27,000 I $0 Septic Drainfield System, 1000 gpd $18,000 LS $0 1 $18,000 Water Domestic Water/Fire Service $35 I, 1400 $49,000 200 $7,000 Fire hvdrant $2,500 1 $2,500 1 $2,500 SUBTOTAL $209,150 $96,375 Contingency {20%} $41,830 $19,275 f:\93007\mpcost.wk3 Total Cost $43,000 $43,275 $3,750 $5,000 $12,500 $12,000 $45,000 $35,000 I $27,000 $18,000 $56,000 $5,000 $305,525 $61.105 ::11::12t§§QJ\[) 1§ 9! Note: Estimate is based on 100-stall south parking lot and 50-stall north parking lot. Pavement section assumes 2" A.C. on 611 base. Stormwater detention system provides detention for 10-year storm per Dept. of Ecology/King County requirements. Onsite wastewater disposal system consists of septic tank and gravity drainfield. Estimate assumes suitable soil types and sufficient area for drainfield is available within site: Assumes fireflow requirement of 1000 gpm with seivice line to site. Utility fees, and permitting and hookup charges not included. ---PAGE BREAK--- ---PAGE BREAK--- i ) ct ID I- d 2 fw, 0 z CI) 0 C\J 0 w l\'I Zl 23>21 3815 0.87 6.35 3.96 3.45 1015 TRILLIUM TRAIL 8050 7.94 4.74 9.30 0.04 1308 PUGET POWERLINE TRAIL 5500 0.00 3.48 7.71 4.52 5500 N/S CORRIDOR 8500 0.06 6.71 7.71 -0.29 170 EAST BOUNDARY > 14 1642 0.00 6.71 7.71 -0.29 170 9>10 1330 0.00 2.75 1.38 -1.13 0 8>9 1110 0.00 2.64 2.14 1.86 0 8>7 1140 0.00 4.40 2.20 2.20 0 7>6 2000 0.00 3.45 1.09 -0.36 0 6>9 700 0.00 5.00 0.20 -0.20 0. 5>6 965 0.00 4.17 2.17 1.17 • 0 4>3 440 0.00 4.00 2.25 -2.25 0 21>18 1470 4.20 4.10 8.56 3.70 600 21'>18' 600 0.00 4.80 1.80 1.80 0 20>10 W 1575 4.36 4.36 1.82 1.82 0 19>20 ' 275 0.00 4.50 10.75 1.75 2015 19>13 970· 5.33 3.50 2.17 1.83 0 18>19 267 5.75 5.50 8.25 1.75 0 18'>17 630 0.00 3.20 4.00 4.00 0 17>16 370 4.00 7.33 2.00 -2.00 0 16>18' 1390 2.50 4.13 7.67 -1.00 0 16>15 460 1.00 3.33 3.67 3.67 0 15>14 1570 0.78 4.33 1.56 1.33 0 14>12 785 0.00 4.33 1.33 1.33 0 13>15 1890 3.92 4.08 6.33 -0.67 0 12>13 115 0.00 3.50 4.00 2.00 0 12>11 870 0.00 3.80 0.00 0.00 0 11>8 1240 0.00 3.40 1.40 1.40 0 11>10 550 0.00 5.42 6.50 1.83 58 10>20 E 930 5.00 3.00 2.00 -1.67 0 TOTAL LINEAR FEET= 51149 AVERAGE SIDESLOPE= 1.52 AVERAGE TREADWIDTH= 4.37 AVERAGE ABS. GRADE= 4.05 AVERAGE GRADE= 1.05 TOTAL RELOCATED FT.= 10836 ---PAGE BREAK--- ---PAGE BREAK--- \ ( TRILLIUM TRAIL PROFILE TOTAL LINEAL FEET= AVERAGE SIDESLOPE= AVERAGE TREAD WIDTH= AVERAGE ABSOLUTE GRADE= AVERAGE GRADE= TOTAL RELOCATION= 8050 8 5 9 0 1308 40 10 0 00 ogoo li58go0 go NN STATION (FT) ---PAGE BREAK--- 0, ThAIL: TRILLIUM TRAIL TREAD TRAVEL- STATION STATION DISTANCE RE- SIDE- GRADE GRADE GRADE WIDTH TREAD TRAVEL- WAY # 15' 0 5 organic 5 2 Iona and 5" deep · 1 3 organic 8 0 heavy organic soils ---PAGE BREAK--- : STATION STATION DISTANCE # fFT\ fFT\ 60+00 6000 200 62+00 6200 200 63+00 6300 100 64+00 6400 100 66+00 6600 200 68+00 6800 200 68+51 6851 51 69+40 6940 89 70+00 7000 60 70+82 7082 82 71+84 7184 102 73+29 7329 145 75+24 7524 195 RE- LOCATION n n n n n n v: beain Iv: cont IV IV IY IY V SIDE- SLOPE 3 0 0 0 2 2 1 0 0 1 0 20 18 20 GRADE GRADE ( (ABS) -1 6 -1 4 -1 2 -1 12 -1 12 -1 16 1 8 -1 18 1 1 0 -1 12 -1 19 1 4 -1 30 7 ' · TREAD TRAVEL- GRADE WIDTH TREAD TRAVEL- WAY I (FT) MATERIAL WAY fFT' fCLASS\ REMARKS mineral -6 5 w/duff 8 0 UI puddles 6000- 6200': large 3' stump in tread, corridor is -20' due to O: 8" alder trail on either side in -80' of unneccesary -4 4 orqanic 8 travelwav trail meanders -2 4 mineral 8 0 6300-6400': a 2.5' diam. hemlock in tread, trail goes around both sides and corridor widens to -12 5 mineral 8 0 -15' -12 4 orqanic 8 0 6400-6600': ouddlina -16 3 mineral 8 0 begin downgrade 8 3 mineral 8 1 section base of gully: large 15' -18 5 organic 8 0 Iona, 4" deeo ouddle 10 5 mineral 8 0 -12 4 mineral 8 0 end trail relocation: sludgy puddle here -19 4 orqanic 8 0 with 4" H2O 0: 12" hemlocks in 4 5 mineral 8 travelwav ! aood trail and tread end relocation: good -30 6 mineral 8 0 trail and tread ---PAGE BREAK--- t ' STATION STATION (FT) 76+00 7600 77+60 7760 78+00 7800 79+55 7955 80+00 8000 80+50 8050 DISTANCE (FT) 76 160 40 155 45 50 RE- LOCATION n 1y: begin 1v: cont V IV IY SIDE- GRADE GRADE SLOPE ( (ABS) 20 -1 1 22 1 16 20 -1 22 5 -1 25 0 1 22 0 1 20 TRILLIUM TRAIL SUMMARY r TREAD GRADE WIDTH TREAD (FT) MATERIAL -1 3 organic 16 7 mineral -22 3 mineral -25 6 organic 22 3 mineral 20 1 0 mineral The Trillium Trail passes through dense forest. A portion of the trail follows an old railroad grade, offering users a gentle grade and wide travelway. Significant sections of the trail have organic soils, resulting in muddy conditions and puddling. Several portions of the trail possess a steep grade which is discontinuous with the remainder of the trail. Approximately 1300 feet of trail relocation will result in a more consistent trail experience. 7 TRAVEL- TRAVEL- WAY WAY il r n NUKTII SCALE , • • ,oo·-o· ACUI ---PAGE BREAK--- ---PAGE BREAK--- APPENDIX 8 INTERPRETIVE GRAPHICS REDMOND WATERSHED MASTER PLAN " . . . . . . . . : : . : . : ---PAGE BREAK--- ---PAGE BREAK--- Wildlife Artist ■ Graphic Designer P.O.Box 4251, Seattle, WA 98104 (206) 767-9937 Interpretive Graphics for Redmond Watershed Four interpretive panels are to be created for the barrier-free interpretive trail surrounding one of the large ponds in the Redmond Watershed. 1his area is an ideal location to present interpretive messages which explore the importance of wetlands and woodlands, and their benefit to wildlife. 1his nature preserve provides homes and food for a diverse number of plants and animals. The access around the pond provides an excellent opportunity for closer observation of both aquatic and terrestrial life. Porcelain enamel is recommended for the outdoor panels. Four panels, 20x24", will be printed and fired with one background color and two print colors. The colors will harmonize with the surrounding landscape. · Objectives: That the visitor will be able to • understand that this area was set aside for open space as a nature preserve for wildlife. • understand that a wetland hosts extraordinary biological diversity. • heighten their awareness of the wildlife activity around the area (bird song, traces of life, look closer, listen, smell) • .learn about the relationship of wildlife to habitat. • establish a positive relationship between visitors and wildlife, leading to visitor interest, empathy, and support. Topics: In general, we want to tell visitors about. Panel 1. . the space provided for wildlife and people. Panel 2. . the abundance of food available for wildlife. Panel 3. ...the shelter that the forest furnishes for wildlife. Panel 4. the signs oflife to be found by looking & listening. ---PAGE BREAK--- Interpretive Graphics for Redmond Watershed Panel (A place for wildlife) Wildlife benefits from open space areas. This is a place, dose to an urban area, where wildlife can be observed relatively undisturbed. The initial panel would introduce the value of wetlands, including lessening the impact of flood waters upon the areas. This ecosystem provides food, shelter, water, & breeding habitat for animal and plant life. Wetlands house a myriad of life forms (biodiversity). Look closer, look quietly, animals hear & see the visitor before the visitor will hear or see them. The relationship of water to the abundance and diversity of wildlife depends upon the quantity and quality of water. Panel (Food) A food web develops within pools of water which supports fish (cutthroat trout to be illustrated), and other life. A healthy and balanced ecosystem, provides nourishment for many different kinds of plants and animals. Slow-moving streams and pooling water will allow a variety of plankton, insects, tadpoles, and small fish to flourish. Snails, dams, bullfrogs, amphibians, garter snake, raccoon, Pacific treefrog, tadpoles, and ducks, could. be some of the illustrated subjects. An above-and below-water scene could be created, showing a log with plants growing on it. Different types of vegetation,and animals could be shown in situ, including a cut-away view through the layers of soil. The deciduous and conifer trees surrounding the pond provide provide berries, nuts and fungus for food for terrestial and arbo real wildlife. Coyote, bear, mouse, Douglas squirrel, deer, and birds are possible animals to illustrate. Panel (Shelter) The surrounding woodland provides numerous places for verte brates and invertebrates to feed, nest, and roost. ---PAGE BREAK--- Interpretive Graphics for Redmond Watershed There is an abundance of remnant standing trees (snags), downed logs, and hollows in living trees. These provide cavities important to wildlife. Plants and animals use many parts of the snags for food and shelter. The old and decaying wood is rich with life. Discover the paths of beetles and termites in the down and dead wood. These open up ways for other insects and fungi to enter the tree. Each stage of decay supports a unique accumulation of insects and fungi to break down and decompose the wood. Foraging birds such as woodpeckers and chickadees, along with salamanders and spiders, search for insects. The pileated wood pecker excavates cavities in which to nest. Listen for the drum ming or loud call. The abandoned cavitity could become shelter for Douglas squirrels, raccoons, or small owls. The illustration could depict the pileated woodpecker and its distinctive chisled holes. Panel #4 (Signs of Life) By looking and listening, an extraordinary world awaits discov ery. Quietly observe. Listen for sounds of birds in the early morn ing or late evening. The singing frogs and toads proffer an un usual chorus. Signs of life that the visitor may find could be a dropped feather, partially eaten nuts, shreaded fir cones, wood pecker holes, bird calls, deer tracks, scat droppings, scratched trunks. Smell the fragrance of conifers, ripening berries, or the musty aroma of the bog and forest compost. A group of images could illustrate items which may be found along the trail, such as nibbled nuts, tracks, or varieties of wood pecker holes. ---PAGE BREAK--- ---PAGE BREAK--- APPENDIX 9 DETAIL COST ESTIMATE FOR OPTION lA TRAIL PLAN REDMOND WATERSHED MASTER PLAN ---PAGE BREAK--- ---PAGE BREAK--- Trail Type Width Linear Feet Mileage Cost/Foot Total Cost Equestrian Reconstruction 3 16896 3.20 $3.50 $59,136.00 New I Rerouted 3 5280 1.00 $3.50 $18,480.00 Total 22176 4.20 $77,616.00 Hiking Trails East Interpretive Reconstruction 2 0 0.00 $ 3.50 $ 0.00 New I Rerouted 2 10309 1.95 $ 4.7.0 $43,297.80 Boardwalk 2 1000 0.19 $ 65.CO $ 65,0CX).OO Total 11309 2.14 $108,297.80 South Interpretive Reconstruction 0 0 0.00 $0.00 $0.00 New I Rerouted 6 2500 0.47 $ 8.40 $ 21,0CX).00 Boardwalk 6 500 0.90 $ 100.00 $ 50,0CX).OO Total 3000 0.57 $71,000.00 Bicycling Reconstruction 3 0 0.00 $ 3.50 $0.00 New I Rerouted 3 8448 1.60 $3.50 $29,568.00 Total 8448 1.60 $29,568.00 Multi-use Non-regional Reconstruction 4 3200 0.61 $3.50 $11,200.00 New I Rerouted 4 0 0.00 $ 5.00 $0.00 Total 3200 0.61 $11,200.00 Regional North/South (Gas Line) Reconstruction 8 9504 1.80 $ 16.00 $ 152,064.00 New I Rerouted 8 0 0.00 $ 16.00 $0.00 Parallel Equestrian 3 9504 1.80 $ 3.50 $33,264.00 Total 9504 1.80 $ 185,328.00 East/West (Puget Power) Reconstruction 12 0 0.00 $0.00 $0.00 New I Rerouted 12 5500 1.04 $ 25.00 $ 137,500.00 Parallel Equestrian 3 5500 1.04 $3.50 $19,250.00 Total 5500 1.04 $156,750.00 GRAND TOTAL 63137 11.96 $639,759.80 REDMOND WATERSHED MASTER PLAN 165 ---PAGE BREAK--- • ---PAGE BREAK--- APPENDIX 1 0 BIBLIOGRAPHY REDMOND WATERSHED MASTER PLAN • • • • U • : • • • • • • • • • • • • • • • • • • • • • • • • • • • • • : • • • • • • • • • • • • • • • • • • ---PAGE BREAK--- ---PAGE BREAK--- l Conservation Corridors. A Highway System for Wildlife. ENFO. 1985 ElAidi, Polly. "Innovations in Wetland Trail Construction". Landscape Architecture. July 1993. Fink, Charles A. and Searns, Robert M. Greenways. A Guide to Planning. Design. and Development. Island Press. 1993 Harris, Larry D. & Gallagher, Peter B. Preserving Communities and Corridors: New Initiatives for Wildlife Conservation. Defenders of Wildlife. 1989. Keller, Kit. Mountain Bikes on Public Lands: A Manager's Guide to the State of the Practice. Bicycle Federation of America, Inc. 1990 Labaree, Jonathan M. How Green ways Work: A Handbook on Ecology. Rivers, Trails, and Conservation Assistance Program. National Park Service. 1992. Noss, Reed F. "Protecting Natural Area in Fragmented Landscapes". Natural Areas Journal. Vol 7 1987. "Redmond Watershed Study". Land Use Analysis /Recommendations Final Report. McConnell/Burke Planning and Development Services. 1985. United States Forest Service. Trails Management Handbook. FSH 2309.18. United States Forest Service. Washington, DC. 1985. Smith, Daniel S. and Hellmund, Paul Cawood. Ecology of Green ways. University of Minnesota Press. 1993 Steiner, Frederick. The Living Landscape An Ecological Approach to Landscape Planning. McGraw-Hill Inc. 1991 Wall, Geoffrey and Wright, The Environmental Impact of Outdoor Recreation. Department of Geography, University of Waterloo. 1977 REDMOND WATERSHED MASTER PLAN 169 ---PAGE BREAK---