2026 RTP Trail Improvements
Springfield, South Dakota
Bid Date: September 14, 2026
Bid Time: 3:00 P.M. CST
Project Engineer: Jacob Sonne, P.E.

Billings Builders Exchange
2050 Broadwater Ave Suite A
Billings, MT 59102
PH: 4066521311 Fax: 4066521391
bbx@billingsplanroom.com
Sioux Falls Builders Exchange
1418 N. C Avenue
Sioux Falls, SD 57104
PH: 6053578687 Fax: 6053578655
info@sfbx.com
Master Builders of Iowa
4100 Westown Pkwy
Des Moines, IA 50266
PH: 5152105541 Fax: 5152105541
source1@mbi.build
Aberdeen Builders Exchange
302 N. Jackson St.
Aberdeen, SD 57401
PH: 6052904210 Fax: 0000000000
dakotabuild@midconetwork.com
FM Builders Exchange
1010 Page Drive
Fargo, ND 58103
PH: 7012376772 Fax: 7012321653
info@fmbx.org
Bismarck_Mandan Builders Exchange
PO Box 550
Mandan, ND 58554
PH: 7016674322 Fax: 7016674322
bismanblderex@gmail.com
Oldcastle Infrastructure
1601 E. 39 St. North
Sioux Falls, SD 57104
PH: 3203916336 Fax: 3203916336
Douglas.schmidgall@oldcastle.com
Rounds Construction Company, Inc.
1124 34th Street
Brookings, SD 57006
PH: 6056957420 Fax: 6056935811
kevinh@roundsconstructioninc.com
Construction Industry Center
2771 Plant St.
Rapid City, SD 57702
PH: 6053435252 Fax: 6053434591
cic@constructionindustrycenter.com
Plains Builders Exchange, Inc.
220 N Kiwanis Ave
Sioux Falls, SD 57104
PH: 6053348886 Fax: 6053340112
info@plainsbuilders.com
Lincoln Builders Bureau
5910 S 58th St Suite C
Lincoln, NE 68516
PH: 4024218332 Fax: 4024218334
info@buildersbureau.com
Bismarck Builders Exchange
723 Memorial Hwy, Ste 2
Bismarck, ND 58504
PH: 7012584215 Fax: 7012581391
info@bbxnd.com
Highway Improvement, Inc.
1104 S Enterprise Ave
Sioux Falls, SD 57110
PH: 6053107725 Fax: 6053350315
brett@highwayimprovementinc.com
Central Specialties, Inc.
6325 County Road 87 SW
Alexandria, MN 56308
PH: 3207627289 Fax: 3207627290
quotes@centralspecialties.com
PWXPress
1900 Coffeeport Rd
Jacksonville, Florida (FL) USA, FL 32208
PH: 4086768941 Fax: 4086768941
bids@pwxpress.com
ConstructConnect
3825 Edwards Rd #800
Cincinnati, OH 45209
PH: 5134585981 Fax: 8665708187
content@constructconnect.com