Lilydale Regional Park “North Knob” Stabilization Meeting February 1, 2018
Me e ting Ag e nda 1. Introductions & Project Background – General – Cherokee Heights Ravine 2. Engineering Design Items – North Knob Slope Design/Geometry – Disposal Site – Restoration-3D simulation 3. Schedule – Bidding – Construction 4. Questions/Discussion 2
Location Map Pleasant Ave Avon St S Cliff St Linwood Ave t Harriet Island Webster St Michigan St S Linwood Ave Western Ave S Linwood Ave n City of Saint Paul n e Regional Park Milton St S 35E t A v t S S A Saint Clair Ave Nugent Ave D e l o s S t W e Smith r e l Duke St e Parks and Recreation P n i k r r E y r t o e Lombard Ave S b Av r Isabel St W t n l S o e e a d C Lilydale Regional Park b Grace St i Richmond St u e e Grace St C o n g r e s s S t W n 7th St W e Ben Hill Rd D O v A t Daly St Shepard Rd S e e A Ayd Mill Rd i l c n Clay St k e o o Winifred St W r S t Webster St e t l h r t Colborne St C a S h Water St C e c Jefferson Ave Robie St W Robie St W Edgcumbe Rd n a t S V t S o Manomin Ave r G e o r g e S t W Juliet Ave Pleasant Ave Monroe Ct t o n Duke St b o Fulton St Palace Ave r r t A o S T Palace Ave t Palace Ave n S Stevens St W o e t Bidwell St S f i c King St W l S C n Cherokee t James Ave S a Webster St James Ave James Ave S t V Erie St K i n g S t W Orleans St t S S Bellows St n View St e o Regional Park a n Waseca St v t o l i A i r Randolph Ave M o t l t a r Baker St W a c t l S o i h Baker St W Chatsworth St S V e C y c e Cherokee Ave a Lexington Pkwy S Juno Ave s v Ohio St B O t A Winslow Ave S Morton St W e e k Fossil r a Armstrong Ave a Blvd Dodd Rd w r D Ground Page St W a l Waseca St Heights e Watson Ave Parking D Seminole Ave P W a t s o n Watson Ave A v e Ottawa Ave l e Lot a Sidney St W s a ee T u s c a r o r a A v e ok n e r Ch t d Sumac St A Smith Ave R Curtice St W v e e l Bayard Ave B a y a r d A v e P b m Stewart Ave m Chippewa Ave F o r s t e r S t Butternut Ave u l Winona St W a c Scheffer Ave g c Canton St Mercer St t d n Bidwell St P l E o r Wyoming St W M e t * S Eleanor Ave Eleanor Ave m l a n P i r r e O O t t o A v A n n a p o l i s S t W Otto Ave Bruce Vento Alaska Ave t S Scenic Overlook Fossil e c Ground a R Lilydale Rd Fossil Ground Area Adrian St May St t S e To Parking Lot c Pickerel Lake a Water R M i s s i s s i p p i R i v e r Fall Albion Ave Lilydale i l a T r y a l W o n a Regional Park a l e g i Pickerel Lake 7th St W e Echo r t n R C o g a n Cave Fossil d M o v S l o r n Bed E B l M a Fossil c a t h Sa m b r s t g Montreal Ave e Bed C i t e e Brick H l a y e Oven P e Elway St t i k o Benson Ave r e h Trail C Rail Road Ivan Way Head Annapolis St r T e e n G l Key A ± @ ? Fossil Echo Cave d Bed R R d Brick Oven r Parking Lot a a ± ? @ A p l i Water e 35E R M h Water Fall S o Fall i a d Scenic Overlook d Wetland Water d Clay Pitt l e Fall C Stream Boat Launch l a y Fossil Be d P i t Trails - Off Streets Crosby Farm Wetland Streets Bruce Vento Regional Park Concrete Slab Fossil Scenic Fossil Ground W Bed Overlook e s Caution t St. Paul Parks and Recreation Cla Lilydale fossil ground trails Wetland Parks and Rec GIS are on steep slopes. No y Map Prepared By: Ger Pha P water available. i t Nov, 2006
History of Site Annapolis Cherokee Regional Park Cherokee Hts Ravine Hwy 13 North Knob Brickyard Trail Mississippi River Pickerel Lake Former location of Twin Cities Brickyards
Drainage Areas k Waterfall W Sidney St k Seep W Water St ! < Bruce Vento Scenic Overlook S Cherokee Heights Ave Storm Sewer Manholes Culvert Crossing W Curtice St Chippewa Ave Storm Sewer Pipes Ravine/Stream Channel Included in Study Subwatershed Divides k k A: North Cherokee Major Watersheds Heights Culvert W W i n o n a S t k k k Cherokee Heights Cherokee Ravine k k k Cherokee Ravine 2 S Ottawa Ave B: Cherokee Heights Culvert S Smith Ave Fremont W Wyoming St Fremont Ravine Cherokee Heights Blvd e Fremont Ravine 2 v A e r a Fremont Ravine 3 w a l e D Trail C: Fremont Avenue Culvert S A n n a p o l i s S t F r e m o n t A v e 49 acres k k G a r d e Hiawatha Ave n L Dewerff St a k M i n a S t Manomin Ave 22 acres I 13 Simard St < ! e v A e r 149 a 0 150 300 w Chippewa Ave a l e D Feet e v A h e t Ottawa Ave i m v Miriam St A S C i r u t c l i f f S e W Bernard St e k o r e STORMWATER MODELING h C Brickyard Area of Diego La Lilydale Regional Park D o w St. Paul, Minnesota n d i R n g d S d t o D Winston Ct FIGURE 4-1
Brickyard Trail Culvert Cherokee Regional Park Parking/Picnic Area ü Æ Ravine Lower North Stream Channel Brickyard Trail - Lower Section North Ravine Falls North Cherokee Heights Culv k k Northwest Slope Failure Brickyard Trail k Lower Falls k k North Ravine North Knob k Old Scarp East Clay Pit k k Falls Cherokee Heights 2013 Slope Failure Area Ravine # V Fossil Site 2 ? ! Fossil Site 1 Brickyard Trail - Fossil/Brick Oven 0 Section Cherokee Heights Culvert East Clay Pit Annapolis St North Knob Fremont Avenue Culvert Sinkhole Brickyard Trail - Connector Section F r e m o n t A v e Cherokee Heights Blvd Fossil Site 3 k k Garden La Brickyard Access Trail - Bluff Section k Ravine
Pre-construction condition (March 2015) 4’ gully across path- culvert 100% blocked and P washout around P
Culvert Repair (April 2015) Culvert removed, ravine channel regraded and culvert replaced.
Post Rain Event (May 8, 2015) 75% blockage after rain event. Upstream channel diverted during rain event and resulted in erosion west of culvert.
Post Rain Event (May 28, 2015) 100% blockage after additional rain events.
Sediment carried to Mississippi River via Pickerel Lake Sediment from North Knob area will continue to be deposited into Pickerel Lake and Mississippi River until North Knob stabilized. Sediment caught by floating silt curtain
Funding Request Summary February 2016 - request $4.584 million to Minnesota Board of Water and Soil Resources (BWSR) - Unsuccessful. May 2016 - resubmitted request to BWSR for Disaster Relief Funds (DRAP) for $1.905 million focusing on steep slope stability. December 2016 - Received $925,000 in DRAP funds. Need for additional funds for restoration - Received $164,500 Conservation Partners Legacy to enhance 61 acres of forest and prairie habitat in Cherokee Regional Park. Portion of funds will go towards bluff restoration. - Reviewing application for restoration funds from Natural Resource Trust Fund in partnership with Ramsey Conservation District and Great River Greening. February 2018 deadline.
Me e ting Ag e nda 1. Introductions & Project Background – General – Cherokee Heights Ravine 2. Engineering Design Items – North Knob Slope Design/Geometry – Disposal Site – Restoration-3D simulation 3. Schedule – Bidding – Construction 4. Questions/Discussion 4
Upstre a m Dra ina g e Are a Che ro ke e He ig hts Ra vine Municipal Boundary Storm Sewer Manholes Storm Sewer Pipes k Waterfall Stream/Ravine Cherokee Heights Ravine Cherokee Heights Study Area Brickyard Area Study Limits Cherokee Heights Watershed 1
Che ro ke e He ig hts Ra vine I mpro ve me nt Alte rna tive s Co nside re d 1. Downstream channel stabilization Engineered and bioengineering techniques • Selective planting and vegetation management • 2. Peak flow reduction (US storage/culvert modifications) Upstream storage & infiltration reduced bluff slope stability • Significant excavation changed park aesthetics • Loss of trees and park space • 3. Downstream piped system Riprap channel & piped system • to Mississippi River High construction cost • 6
Che ro ke e He ig hts Ra vine 2018-2019 I mpro ve me nts 1. Downstream channel stabilization 2. Underground stormwater treatment systems 7
Che ro ke e He ig hts Ra vine I mpro ve me nts F unding So urc e s Project to be funded by BWSR Clean Water Fund grant award and contributing cities: Mendota Heights • West St. Paul • St. Paul • 8
Me e ting Ag e nda 1. Introductions & Project Background – General – Cherokee Heights Ravine 2. Engineering Design Items – North Knob Slope Design/Geometry – Disposal Site – Restoration-3D simulation 3. Schedule – Bidding – Construction 4. Questions/Discussion 9
L ilyda le Pa rk – Site Ma p North Knob Area Brickyard Trail Next image 10
2015 Ae ria l I ma g e (Po st-June 2014 F a ilure ) Failed Seepage Soils and New Stream Channel Large 2014 Failure Lower Area Waterfall Upper Waterfall 11
Slo pe F a ilure Are a & L o we r No rth Stre a m Cha nne l March 30, 2017 12
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